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产品型号JFC100C1的Datasheet PDF文件预览

Data Sheet  
October 1999  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input; 15 Vdc Output; 50 W to 100 W  
in redundant and/or distributed power applications.  
Features  
Small size: 61.0 mm x 57.9 mm x 12.7 mm  
(2.40 in. x 2.28 in. x 0.50 in.)  
High power density  
High efficiency: 85% typical  
Low output noise  
Constant frequency  
Metal baseplate  
2:1 input voltage range  
Anti-rollback circuit  
The JFC-Series Power Modules use advanced, surface-  
mount technology and deliver high-quality, efficient, compact  
dc-dc conversion.  
Overcurrent protection  
Primary and secondary remote on/off  
Applications  
Remote sense  
Redundant and/or distributed power architectures  
Workstations  
Output voltage set-point adjustment  
Output overvoltage protection  
Synchronization  
Computer equipment  
Communications equipment  
Forced load sharing (parallelable)  
Output current monitor  
Options  
Current-limit set-point adjustment  
Overtemperature protection  
Power good signal  
Heat sinks available for extended operation  
Choice of primary remote on/off logic configura-  
tions  
Delayed current-limit shutdown  
Thermal warning signal  
Adjustable output voltage  
Case ground pin  
Description  
The JFC-Series Power Modules are dc-dc converters  
that operate over an input voltage range of 18 Vdc to  
36 Vdc and provide a precisely regulated dc output.  
The output is fully isolated from the input, allowing ver-  
satile polarity configurations and grounding connec-  
tions. The modules have maximum power ratings from  
50 W to 100 W at typical full-load efficiencies of 85%.  
ISO* 9001 Certified manufacturing facilities  
UL1950 Recognized, CSAC22.2 No. 950-95  
Certified, and VDE 0805 (EN60950, IEC950)  
Licensed  
The sealed modules have metal baseplates for excel-  
lent thermal performance. Threaded-through holes  
are provided for easy mounting or adding a heat sink  
for high-temperature applications. Listed above are  
the enhanced features for convenience and flexibility  
* ISO is a registered trademark of the International Organization of  
Standardization.  
UL is a registered trademark of Underwriters Laboratories, Inc.  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Absolute Maximum Ratings  
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-  
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess  
of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended  
periods can adversely affect device reliability.  
Parameter  
Input Voltage (continuous)  
Symbol  
Min  
Max  
50  
Unit  
V
VI  
TC  
I/O Isolation Voltage (for 1 minute)  
1500  
100  
Vdc  
°C  
Operating Case Temperature  
40  
(See Thermal Considerations section.)  
Storage Temperature  
Tstg  
55  
125  
°C  
Electrical Specifications  
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature  
conditions.  
Table 1. Input Specifications  
Parameter  
Operating Input Voltage  
Symbol  
Min  
Typ  
Max  
Unit  
VI  
18  
28  
36  
Vdc  
Maximum Input Current  
(VI = 0 V to 75 V; IO = IO, max):  
JFC050C  
II, max  
II, max  
II, max  
4.55  
6.76  
9.10  
A
A
A
JFC075C  
JFC100C (See Figure 1.)  
Inrush Transient  
i2t  
2.0  
A2s  
Input Reflected-ripple Current, Peak-to-peak  
(5 Hz to 20 MHz, 12 µH source impedance;  
see Figure 8.)  
II  
10  
mAp-p  
Input Ripple Rejection (120 Hz)  
60  
dB  
Fusing Considerations  
CAUTION: This power module is not internally fused. An input line fuse must always be used.  
This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone  
operation to an integrated part of a sophisticated power architecture. To preserve maximum flexibility, internal fus-  
ing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The  
safety agencies require a normal-blow fuse with a maximum rating of 20 A (see Safety Considerations section).  
Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same  
type of fuse with a lower rating can be used. Refer to the fuse manufacturers data for further information.  
2
Tyco Electronics Corp.  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Electrical Specifications (continued)  
Table 2. Output Specifications  
Parameter  
Device  
Symbol  
Min  
Typ  
Max  
Unit  
Output Voltage Set Point  
All  
VO, set  
14.77  
15.0  
15.23  
Vdc  
(VI = 28 V; IO = IO, max; TC = 25 °C)  
Output Voltage  
All  
VO  
14.55  
15.45  
Vdc  
(Over all static operating input voltage, resistive  
load, and temperature conditions until end of  
life; see Figure 10.)  
Output Regulation:  
Line (VI = 18 V to 36 V)  
Load (IO = IO, min to IO, max)  
Temperature (TC = 40 °C to +100 °C)  
All  
All  
All  
0.01  
0.05  
50  
0.1  
0.2  
150  
%VO  
%VO  
mV  
Output Ripple and Noise Voltage  
(See Figure 9.):  
RMS  
All  
All  
60  
250  
mVrms  
mVp-p  
Peak-to-peak (5 Hz to 20 MHz)  
External Load Capacitance  
All  
0
*
µF  
Output Current  
(At IO < IO, min, the module may exceed output  
ripple specifications.)  
JFC050C  
JFC075C  
JFC100C  
IO  
IO  
IO  
0.5  
0.5  
0.5  
3.3  
5.0  
6.7  
A
A
A
Output Current-limit Inception  
(untrimmed; VO = 90% of VO, nom)  
JFC050C  
JFC075C  
JFC100C  
IO, cli  
IO, cli  
IO, cli  
3.8  
5.8  
7.7  
4.3†  
6.5†  
8.7†  
A
A
A
Output Short-circuit Current (VO = 250 mV)  
All  
170  
%IO, max  
Efficiency  
(VI = 28 V; IO = IO, max; TC = 70 °C; see  
Figure 10.)  
JFC050C  
JFC075C  
JFC100C  
η
η
η
84  
85  
85  
%
%
%
Switching Frequency  
All  
500  
kHz  
Dynamic Response  
(ýIO/ýt = 1 A/10 µs, VI = 28 V, TC = 25 °C; tested  
with a 10 µF aluminum and a 1.0 µF ceramic  
capacitor across the load; see Figures 5 and 6):  
Load Change from IO = 50% to 75% of IO, max:  
Peak Deviation  
Settling Time (VO < 10% of peak deviation)  
Load Change from IO = 50% to 25% of IO, max:  
Peak Deviation  
All  
All  
3
300  
%VO, set  
µs  
All  
All  
3
300  
%VO, set  
µs  
Settling Time (VO < 10% of peak deviation)  
* Consult your sales representative or the factory.  
These are manufacturing test limits. In some situations, results may differ.  
Table 3. Isolation Specifications  
Parameter  
Isolation Capacitance  
Min  
Typ  
Max  
Unit  
pF  
2500  
Isolation Resistance  
10  
M¾  
Tyco Electronics Corp.  
3
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
General Specifications  
Parameter  
Calculated MTBF (IO = 80% of IO, max; TC = 40 °C)  
Weight  
Min  
Typ  
2,700,000  
Max  
100 (3.5)  
Unit  
hours  
g (oz.)  
Feature Specifications  
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature  
conditions. See Feature Descriptions and Design Considerations sections for further information.  
Table 4. Feature Specifications  
Parameter  
Remote On/Off Signal Interface  
Symbol Min  
Typ  
Max  
Unit  
(VI = 0 V to 36 V; open collector or equivalent compatible;  
signal referenced to VI() terminal; see Figure 11 and  
Feature Descriptions.):  
JFCxxxC1 Preferred Logic:  
Both Primary and Secondary Referenced Remote On/Off:  
Logic LowModule On  
Logic HighModule Off  
JFCxxxC Optional Logic (optional for primary referenced  
remote on/off only):  
Primary Referenced Remote On/Off:  
Logic LowModule Off  
Logic HighModule On  
Secondary Referenced Remote On/Off:  
Logic LowModule On  
Logic HighModule Off  
Logic Low:  
Ion/off = 1.0 mA  
Von/off  
Ion/off  
0
1.2  
1.0  
V
Von/off = 0.0 V  
mA  
Logic High (open collector):  
Ion/off = 0.0 µA  
Von/off  
Ion/off  
20  
15  
50  
35  
V
µA  
ms  
Leakage Current  
Turn-on Time  
(IO = 80% of IO, max; VO within ±1% of steady state)  
Output Voltage Adjustment (See Feature Descriptions.):  
Output Voltage Remote-sense Range  
50  
0.5  
103  
V
Output Voltage Set-point Adjustment (trim) Range  
(Note: Ensure that the combination of remote-sense and trim  
do not exceed 15.5 V on the output.)  
%VO, nom  
Output Overvoltage Protection  
16.7*  
20.0*  
V
Synchronization:  
Clock Amplitude  
Clock Pulse Width  
Fan-out  
4.00  
0.4  
5.00  
V
µs  
1
Capture Frequency Range  
425  
575  
kHz  
Output Current Monitor (IO = IO, max, TC = 70 °C):  
JFC050C  
JFC075C  
JFC100C  
IO, mon  
IO, mon  
IO, mon  
1.28  
0.96  
0.64  
V/A  
V/A  
V/A  
Overtemperature Protection (See Figure 18.)  
TC  
105  
°C  
* These are manufacturing test limits. In some situations, results may differ.  
4
Tyco Electronics Corp.  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Feature Specifications (continued)  
Table 4. Feature Specifications (continued)  
Parameter  
Symbol Min  
Typ  
Max  
Unit  
Forced Load Share Accuracy  
10  
%IO, rated  
Power Good Output  
(Open collector output: low level indicates power good.):  
Output Sink Current (VO ð 1.5 V)  
Maximum Voltage  
200  
50  
36  
mA  
V
k¾  
High-state Internal Impedance to Ground  
Thermal Warning  
(Open collector output; low level indicates overtemperature  
shutdown is imminent.):  
Output Sink Current (VO ð 1.5 V)  
Maximum Voltage  
200  
6
36  
mA  
V
k¾  
High-state Internal Impedance to Ground  
Overvoltage Shutdown Threshold Adjustment Range  
Overcurrent Threshold Adjustment Range  
Overcurrent Shutdown Delay (optional)  
50  
10  
4
100  
100  
%VO, clamp, nom  
%IO, cli, nom  
s
Solder, Cleaning, and Drying Considerations  
Post solder cleaning is usually the final circuit-board assembly process prior to electrical testing. The result of inad-  
equate circuit-board cleaning and drying can affect both the reliability of a power module and the testability of the  
finished circuit-board assembly. For guidance on appropriate soldering, cleaning, and drying procedures, refer to  
the Board-Mounted Power Modules Soldering and Cleaning Application Note (AP97-021EPS).  
Tyco Electronics Corp.  
5
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Characteristic Curves  
The following figures provide typical characteristics for the power modules. The figures are applicable to both on/off  
configurations.  
8
87  
7
6
5
4
3
2
1
0
86  
85  
84  
83  
82  
81  
80  
79  
78  
77  
76  
VI = 6.6 A  
VI = 3.3 A  
VI = 0.33 A  
V
I
= 36 V  
= 28 V  
= 18 V  
VI  
VI  
0
5
10  
15  
20  
25  
30  
35  
40  
0
1
2
3
4
5
6
INPUT VOLTAGE, V I (V)  
OUTPUT CURRENT, IO (A)  
8-1776 (C)  
8-1780 (C)  
Figure 1. Typical JFC100C Input Characteristics at  
Room Temperature  
Figure 3. Typical JFC100C Converter Efficiency vs.  
Output Current at Room Temperature  
16  
14  
12  
V
I
= 36 V  
= 28 V  
= 18 V  
10  
8
VI  
VI  
6
4
2
0
0
1
2
3
4
5
6
7
8
9
OUTPUT CURRENT, I  
O
(A)  
8-1778 (C)  
Figure 2. Typical JFC100C Output Characteristics  
at Room Temperature  
TIME, t (1 µs/div)  
8-2026 (C)  
Note: See Figure 9 for test conditions.  
Figure 4. Typical JFC100C Output Ripple Voltage  
at Room Temperature, 28 V Input, IO =  
Full Load  
Characteristic Curves (continued)  
6
Tyco Electronics Corp.  
Data Sheet  
October 1999  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
TIME, t (500 µs/div)  
TIME, t (5 ms/div)  
8-2028 (C)  
8-1986 (C)  
Note: Tested with a 10 µF aluminum and a 1.0 µF ceramic capacitor  
across the load.  
Note: Tested with a 10 µF aluminum and a 1.0 µF ceramic capacitor  
across the load.  
Figure 5. Typical JFC100C Transient Response to  
Step Decrease in Load from 50% to 25%  
of Full Load at Room Temperature and  
28 V Input (Waveform Averaged to  
Figure 7. Typical Start-Up from Remote On/Off  
JFC100C1; IO = Full Load  
Eliminate Ripple Component.)  
TIME, t (200 µs/div)  
8-2010 (C)  
Note: Tested with a 10 µF aluminum and a 1.0 µF ceramic capacitor  
across the load.  
Figure 6. Typical JFC100C Transient Response to  
Step Increase in Load from 50% to 75% of  
Full Load at Room Temperature and  
28 V Input (Waveform Averaged to  
Eliminate Ripple Component.)  
Tyco Electronics Corp.  
7
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Test Configurations  
Design Considerations  
Input Source Impedance  
TO OSCILLOSCOPE  
CURRENT  
PROBE  
L
TEST  
The power module should be connected to a low  
ac-impedance input source. Highly inductive source  
impedances can affect the stability of the power mod-  
ule. For the test configuration in Figure 8, a 33 µF elec-  
trolytic capacitor (ESR < 0.7 ¾ at 100 kHz) mounted  
close to the power module helps ensure stability of the  
unit. For other highly inductive source impedances,  
consult the factory for further application guidelines.  
VI(+)  
12 µH  
S 220 µF  
C
33 µF  
ESR < 0.7  
@ 100 kHz  
ESR < 0.1 Ω  
@ 20 ˚C, 100 kHz  
BATTERY  
VI(–)  
8-203 (C).l  
Note: Measure input reflected-ripple current with a simulated source  
inductance (LTEST) of 12 µH. Capacitor CS offsets possible bat-  
tery impedance. Measure current as shown above.  
Safety Considerations  
Figure 8. Input Reflected-Ripple Test Setup  
For safety-agency approval of the system in which the  
power module is used, the power module must be  
installed in compliance with the spacing and separation  
requirements of the end-use safety agency standard,  
i.e., UL1950, CSA C22.2 No. 950, and VDE 0805  
(EN60950, IEC950)  
COPPER STRIP  
VO(+)  
For the converter output to be considered meeting the  
requirements of safety extra-low voltage (SELV), the  
input must meet SELV requirements.  
RESISTIVE  
LOAD  
1.0 µF  
10 µF  
SCOPE  
VO()  
If the input meets extra-low voltage (ELV) require-  
ments, then the converters output is considered ELV.  
8-513 (C).b  
The input to these units is to be provided with a maxi-  
mum 20 A normal-blow fuse in the ungrounded lead.  
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or tan-  
talum capacitor. Scope measurement should be made using a  
BNC socket. Position the load between 51 mm and 76 mm  
(2 in. and 3 in.) from the module.  
Feature Descriptions  
Overcurrent Protection  
Figure 9. Peak-to-Peak Output Noise  
Measurement Test Setup  
To provide protection in a fault (output overload) condi-  
tion, the unit is equipped with internal current-limiting  
circuitry and optional delayed shutdown. At the point of  
current-limit inception, the unit shifts from voltage con-  
trol to current control. If the output voltage is pulled  
very low during a severe fault, the current-limit circuit  
can exhibit either foldback or tailout characteristics  
(output current decrease or increase). The unit will  
operate normally once the output current is brought  
back into its specified range. If the module has the  
optional delayed current-limit shutdown, the unit will  
operate normally once the output current is brought  
back into its specified range, provided the overcurrent  
condition is removed before the module shuts down.  
SENSE(+)  
CONTACT AND  
DISTRIBUTION LOSSES  
VI (+)  
VO(+)  
IO  
I I  
LOAD  
SUPPLY  
VI ()  
VO()  
CONTACT  
RESISTANCE  
SENSE()  
8-749 (C)  
Note: All measurements are taken at the module terminals. When  
socketing, place Kelvin connections at module terminals to  
avoid measurement errors due to socket contact resistance.  
[VO(+) (VO())]IO  
[VI(+) (VI())]II  
------------------------------------------------------  
η =  
x 100  
%
Figure 10. Output Voltage and Efficiency  
Measurement Test Setup  
8
Tyco Electronics Corp.  
Data Sheet  
October 1999  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Feature Descriptions (continued)  
Overcurrent Protection (continued)  
If not using the primary remote on/off feature, do one of  
the following:  
For negative logic, short the ON/OFF pin to VI().  
For positive logic, leave the ON/OFF pin open.  
The current-limit set point can be reduced by connect-  
ing a resistor between the overcurrent trim (OCTRIM)  
pin and SENSE() pin. The resistor value is derived by  
the following equation:  
Secondary Remote On/Off  
The secondary remote on/off signal (S-ON/OFF pin) is  
only available with negative logic. The negative logic sig-  
nal turns the module off during a logic high and on during  
a logic low. To turn the power module on and off, the user  
must supply a switch to control the voltage between the  
S-ON/OFF pin and the SENSE() pin (i.e., Von/off, sec).  
The switch can be an open collector or equivalent (see  
Figure 11). A logic low is Von/off, sec = 0 V to 1.2 V. The  
maximum Ion/off, sec during a logic low is 1 mA. The switch  
should maintain a logic-low voltage while sinking 1 mA.  
11 Itrim 1.15 Irated  
1.15 Irated Itrim  
-----------------------------------------------------  
Rcl-adj =  
k  
Where:  
Rcl-adj is the value of an external resistor between the  
OCTRIM pin and SENSE() pin.  
Irated is the output current rating of the module.  
(not the output current-limit inception).  
Itrim  
is the trimmed value of the output current-limit  
set point.  
During a logic high, the maximum Von/off, sec generated  
by the power module is 15 V. The maximum allowable  
leakage current of the switch at Von/off, sec = 15 V is 50  
µA.  
Remote On/Off  
There are two remote on/off signals, a primary refer-  
enced signal and a secondary referenced signal. Both  
signals must be asserted on for the module to deliver  
output power. If either signal is asserted off, the module  
will not deliver output power. Both signals have internal  
pull-up circuits and are designed to interface with an  
open collector pull-down device. Typically one on/off  
signal will be permanently enabled by hardwiring it to  
its return while the other on/off signal is used exclu-  
sively for control.  
If not using the secondary remote on/off feature, short  
the S-ON/OFF pin to the SENSE() pin.  
VI(+)  
Ion/off, sec  
S- ON/OFF  
Ion/off, pri  
+
(SECONDARY)  
ON/OFF  
(PRIMARY)  
Von/off, sec  
SENSE()  
+
Von/off, pri  
Primary Remote On/Off  
VI()  
The primary remote on/off signal (ON/OFF) is available  
with either positive or negative logic. Positive logic turns  
the module on during a logic high and off during a logic  
low. Negative logic remote on/off turns the module off  
during a logic high and on during a logic low. Negative  
logic (code suffix 1) is the factory-preferred configura-  
tion.  
8-1398 (C)  
Figure 11. Remote On/Off Implementation  
Remote Sense  
To turn the power module on and off, the user must sup-  
ply a switch to control the voltage between the primary  
remote on/off terminal (Von/off, pri) and the VI() terminal.  
The switch can be an open collector or equivalent (see  
Figure 11). A logic low is Von/off, pri = 0 V to 1.2 V. The  
maximum Ion/off, pri during a logic low is 1 mA. The switch  
should maintain a logic-low voltage while sinking 1 mA.  
Remote sense minimizes the effects of distribution  
losses by regulating the voltage at the remote-sense  
connections. The voltage between the remote-sense  
pins and the output terminals must not exceed the out-  
put voltage sense range given in the Feature Specifica-  
tions table, i.e.:  
[VO(+) VO()] [SENSE(+) SENSE()] ð 0.5 V  
During a logic high, the maximum Von/off, pri generated by  
the power module is 15 V. The maximum allowable  
leakage current of the switch at Von/off, pri = 15 V is 50  
µA.  
The voltage between the VO(+) and VO() terminals  
must not exceed the output overvoltage shutdown volt-  
age. This limit includes any increase in voltage due to  
remote-sense compensation and output voltage set-  
point adjustment (trim), see Figure 12.  
Tyco Electronics Corp.  
9
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Feature Descriptions (continued)  
VI(+)  
VO(+)  
Remote On/Off (continued)  
ON/OFF  
SENSE(+)  
For remote-sense operation with multiple paralleled  
units, see Forced Load Sharing (Parallel Operation)  
section.  
CASE  
TRIM  
RLOAD  
Radj-down  
VI()  
SENSE()  
If not using the remote-sense feature to regulate the  
output at the point of load, then connect SENSE(+) to  
VO(+) and SENSE() to VO() at the module.  
VO()  
8-748 (C).c  
Figure 13. Circuit Configuration to Decrease  
Output Voltage  
Although the output voltage can be increased by both  
the remote sense and by the trim, the maximum  
increase for the output voltage is not the sum of both.  
The maximum increase is the larger of either the  
remote sense or the trim. Consult the factory if you  
need to increase the output voltage more than the  
above limitation.  
The following equation determines the required exter-  
nal-resistor value to obtain a percentage output voltage  
change of ý%.  
100  
%  
adj-down  
The amount of power delivered by the module is  
defined as the voltage at the output terminals multiplied  
by the output current. When using remote sense and  
trim, the output voltage of the module can be  
increased, which at the same output current would  
increase the power output of the module. Care should  
be taken to ensure that the maximum output power of  
the module remains at or below the maximum rated  
power.  
R
=
--------- 2 kΩ  
The test results for this configuration are displayed in  
Figure 14. This figure applies to all output voltages.  
1M  
100k  
SENSE(+)  
10k  
SENSE()  
VI(+)  
VO(+)  
IO  
SUPPLY  
LOAD  
II  
VO()  
VI()  
CONTACT  
RESISTANCE  
CONTACT AND  
DISTRIBUTION LOSSES  
1k  
8-651 (C).h  
Figure 12. Effective Circuit Configuration for  
Single-Module Remote-Sense Operation  
100  
0
10  
20  
30  
40  
% CHANGE IN OUTPUT VOLTAGE (%)  
Output Voltage Set-Point Adjustment  
(Trim)  
8-879 (C)  
Figure 14. Resistor Selection for Decreased  
Output Voltage  
Output voltage trim (VOTRIM pin) enables the user to  
increase or decrease the output voltage set point of a  
module. This is accomplished by connecting an exter-  
nal resistor between the VOTRIM pin and either the  
SENSE(+) or SENSE() pins. The trim resistor should  
be positioned close to the module.  
With an external resistor connected between the  
VOTRIM and SENSE(+) pins (Radj-up), the output volt-  
age set point (VO, adj) increases (see Figure 15).  
Although the output voltage can be increased by both  
the remote sense and by the trim, the maximum  
increase for the output voltage is not the sum of both.  
The maximum increase is the larger of either the  
remote sense or the trim. Consult the factory if you  
need to increase the output voltage more than the  
above limitation.  
If not using the trim feature, leave the VOTRIM pin  
open.  
With an external resistor between the VOTRIM and  
SENSE() pins (Radj-down), the output voltage set point  
(VO, adj) decreases (see  
Figure 13).  
10  
Tyco Electronics Corp.  
Data Sheet  
October 1999  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Feature Descriptions (continued)  
100M  
10M  
Output Voltage Set-Point Adjustment  
(Trim) (continued)  
The amount of power delivered by the module is  
defined as the voltage at the output terminals multiplied  
by the output current. When using remote sense and  
trim, the output voltage of the module can be  
increased, which at the same output current would  
increase the power output of the module. Care should  
be taken to ensure that the maximum output power of  
the module remains at or below the maximum rated  
power.  
1M  
100k  
0
2
4
6
8
10  
% CHANGE IN OUTPUT VOLTAGE (%)  
8-2082 (C)  
Figure 16. Resistor Selection for Increased Output  
Voltage  
VI(+)  
VO(+)  
ON/OFF  
SENSE(+)  
Radj-up  
RLOAD  
CASE  
TRIM  
Output Overvoltage Protection  
VI()  
SENSE()  
The output overvoltage shutdown consists of control  
circuitry, independent of the primary regulation loop,  
that monitors the voltage on the output terminals. The  
control loop of the clamp has a higher voltage set point  
than the primary loop (see Feature Specifications  
table). This provides a redundant voltage control that  
reduces the risk of output overvoltage and latches the  
converter off if an overvoltage occurs.  
VO()  
8-715 (C).d  
Figure 15. Circuit Configuration to Increase  
Output Voltage  
Note: The output voltage of this module may be  
increased to a maximum of 0.5 V. The 0.5 V is  
the combination of both the remote-sense and  
the output voltage set-point adjustment (trim).  
Do not exceed 15.5 V between the VO(+) and  
VO() terminals.  
Recovery from latched shutdown is accomplished by  
cycling the dc input power off for at least 1.0 second or  
by toggling the primary or secondary referenced  
remote on/off signal for at least 1.0 second.  
The overvoltage shutdown set point can be lowered by  
placing a resistor between the overvoltage trim  
(OVTRIM) pin and SENSE() pin. This feature is useful  
if the output voltage of the converter has been trimmed  
down and a corresponding reduction in overvoltage trip  
point is desired.  
The following equation determines the required exter-  
nal-resistor value to obtain a percentage output voltage  
change of ý%.  
VO(100 %) (100 + 2%)  
+
adj-up  
------------------------------------- ---------------------------------  
R
=
kΩ  
1.225%  
%  
The resistance required from a given overvoltage nom-  
inal set point is derived from the following equation:  
Only trim up to 0.5 V maximum. See note above.  
The test results for this configuration are displayed in  
Figure 16. For applications requiring voltage between  
15 V and 24 V, consider using the JFC050H, JFC075H,  
JFC100H, or JFC150H (24 V) trimmed down.  
17.6 2 Vov-set  
Vov-set 17.6  
----------------------------------------  
Rov adj =  
kΩ  
-
Where:  
Rov-adj is the value of an external resistor between the  
OVTRIM pin and SENSE() pin.  
Vov-set is the nominal adjusted set point of the overvolt-  
age shutdown threshold.  
The voltage between the VO(+) and VO() terminals  
must not exceed the output overvoltage shutdown volt-  
age. This limit includes any increase in voltage due to  
remote-sense compensation and output voltage set-  
point adjustment (trim).  
Tyco Electronics Corp.  
11  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
remote sense, the forward-voltage drops across the  
Schottky diodes do not affect the set point of the volt-  
age applied to the load. For additional power require-  
ments, where multiple units are used to develop  
combined power in excess of the rated maximum, the  
Schottky diodes are not needed.  
Feature Descriptions (continued)  
Module Synchronization  
Any module can be synchronized to any other module  
or to an external clock using the SYNC IN or SYNC  
OUT pins. The modules are not designed to operate in  
a master/slave configuration; that is, if one module fails,  
the other modules will continue to operate.  
An internal anti-rollback circuit prevents either output  
voltage from falling more than 1 V below the other dur-  
ing light load operation.  
Good layout techniques should be observed for noise  
immunity. To implement forced load sharing, the follow-  
ing connections must be made:  
SYNC IN Pin  
This pin can be connected either to an external clock or  
directly to the SYNC OUT pin of another JFx150x or  
Fx300x module.  
The parallel pins of all units must be connected  
together. The paths of these connections should be  
as direct as possible.  
If an external clock signal is applied to the SYNC IN  
pin, the signal must be a 500 kHz (±50 kHz) square  
wave with a 4 Vp-p amplitude. Operation outside this  
frequency band will detrimentally affect the perfor-  
mance of the module and must be avoided.  
All remote-sense pins must be connected to the  
power bus at the same point. That is, connect all  
remote-sense (+) pins to the (+) side of the power  
bus at the same point, and connect all remote-sense  
() pins to the () side of the power bus at the same  
point. Close proximity and directness are necessary  
for good noise immunity.  
If the SYNC IN pin is connected to the SYNC OUT pin  
of another module, the connection should be as direct  
as possible, and the VI() pins of the modules must be  
shorted together.  
Add a 1000 pF capacitor across the PARALLEL pin  
and SENSE() pin of each module. Locate the  
capacitor as close to the module as possible.  
Unused SYNC IN pins should be tied to VI(). If the  
SYNC IN pin is unused, the module will operate from  
its own internal clock.  
SYNC OUT Pin  
PARALLEL  
SENSE(+)  
SENSE()  
This pin contains a clock signal referenced to the VI()  
pin. The frequency of this signal will equal either the  
modules internal clock frequency or the frequency estab-  
lished by an external clock applied to the SYNC IN pin.  
CASE  
VO(+)  
ON/OFF  
VI(+)  
VO()  
When synchronizing several modules together, the  
modules can be connected in a daisy-chain fashion  
where the SYNC OUT pin of one module is connected  
to the SYNC IN pin of another module. Each module in  
the chain will synchronize to the frequency of the first  
module in the chain.  
VI()  
PARALLEL  
SENSE(+)  
SENSE()  
To avoid loading effects, ensure that the SYNC OUT  
pin of any one module is connected to the SYNC IN pin  
of only one module. Any number of modules can be  
synchronized in this daisy-chain fashion.  
CASE  
VO(+)  
ON/OFF  
VI(+)  
VO()  
VI()  
8-581 (C)  
Figure 17. Wiring Configuration for Redundant  
Parallel Operation  
Forced Load Sharing (Parallel Operation)  
For either redundant operation or additional power  
requirements, the power module can be configured for  
parallel operation with forced load sharing (see  
Figure 17). For a typical redundant configuration,  
Schottky diodes or an equivalent should be used to  
protect against short-circuit conditions. Because of the  
12  
Tyco Electronics Corp.  
Data Sheet  
October 1999  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Thermal Warning  
Feature Descriptions (continued)  
The thermal warning (TEMPWARN) pin is a second-  
ary-referenced, open-collector output that shorts to  
SENSE() a few degrees before the module goes into  
thermal shutdown. When the module temperature  
cools, the thermal warning pin will open, but the unit  
will remain latched off until the input power or the pri-  
mary or secondary referenced remote on/off is recy-  
cled for 1.0 second.  
Output Current Monitor  
The current monitor (CURMON) pin produces a dc volt-  
age proportional to the dc output current of the module.  
The voltage is referenced to the secondary SENSE()  
pin and is typically 4.8 V at rated output current. For  
paralleling with Fx300x modules, consult the factory for  
the V/A ratio. The output impedance of this pin is  
approximately 20 k¾, so customer detection circuitry  
must have a high-impedance input.  
Thermal Considerations  
Introduction  
Overtemperature Protection  
The JFC-Series power modules operate in a variety of  
thermal environments; however, sufficient cooling  
should be provided to help ensure reliable operation of  
the units. Heat-dissipating components inside the units  
are thermally coupled to the case. Heat is removed by  
conduction, convection, and radiation to the surround-  
ing environment. Proper cooling can be verified by  
measuring the case temperature. Peak temperature  
(TC) occurs at the position indicated in Figure 18.  
To provide protection in a fault condition, the unit is  
equipped with a thermal shutdown circuit. The shut-  
down circuit will not engage unless the unit is operated  
above the maximum case temperature. Recovery for  
the thermal shutdown is accomplished by cycling the  
dc input power off for at least 1.0 second or by toggling  
the primary or secondary referenced remote on/off sig-  
nal for at least 1.0 second.  
38.0 (1.50)  
MEASURE CASE  
TEMPERATURE HERE  
Power Good Signal  
7.6 (0.30)  
The power good signal (PWRGOOD pin) is an open-  
collector, secondary-referenced pin that is pulled low  
when all five of the following conditions are met:  
1. The sensed output voltage is greater than half the  
rated nominal output voltage.  
2. The overvoltage shutdown latch is not set.  
3. The thermal shutdown latch is not set.  
4. The unit is not in current limit.  
5. Secondary internal bias is present.  
8-1397 (C).a  
There is one situation where the power good signal can  
be low even though the module has failed. This can  
occur when the module is paralleled with other mod-  
ules for additional output power (i.e., the output ORing  
diodes would not be used). If one module power train  
stops delivering power (fails), the other paralleled mod-  
ule(s) would provide a voltage at the output pin of the  
failed module. The failed module would then not detect  
that its output power was not being delivered. However,  
in this situation the current monitor pins of the paral-  
leled modules would indicate that current is not being  
delivered from one module and that module had failed.  
Note: Top view, measurements shown in millimeters and (inches).  
Pin locations are for reference.  
Figure 18. Case Temperature Measurement  
Location  
The temperature at this location should not exceed  
100 °C. The output power of the module should not  
exceed the rated power for the module as listed in the  
Ordering Information table.  
Although the maximum case temperature of the power  
modules is 100 °C, you can limit this temperature to a  
lower value for extremely high reliability.  
For redundant applications, the ORing diodes would  
keep the other module voltages from being applied to  
the failed module output and the power good signal  
would indicate a failure.  
Tyco Electronics Corp.  
13  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Thermal Considerations (continued)  
35  
4.0 m/s(800 ft./min.)  
3.5 m/s(700 ft./min.)  
3.0 m/s(600 ft./min.)  
2.5 m/s(500 ft./min.)  
2.0 m/s(400 ft./min.)  
1.5 m/s(300 ft./min.)  
1.0 m/s(200 ft./min.)  
0.5 m/s(100 ft./min.)  
Introduction (continued)  
30  
25  
For additional information regarding this module, refer to  
the Thermal Management JC-, JFC-, JW-, and JFW-  
Series 50 W to 150 W Board-Mounted Power Modules  
20  
Technical Note (TN97-008EPS).  
15  
10  
Heat Transfer Without Heat Sinks  
5
0.1 m/s (NAT. CONV.)  
(20 ft./min.)  
Increasing airflow over the module enhances the heat  
0
0
10  
20  
30  
40  
50  
60  
70  
80  
90 100  
transfer via convection. Figure 19 shows the maximum  
power that can be dissipated by the module without  
exceeding the maximum case temperature versus local  
ambient temperature (TA) for natural convection  
through 4 m/s (800 ft./min.).  
LOCAL AMBIENT TEMPERATURE, TA (˚C)  
8-1150 (C).a  
Figure 19. Forced Convection Power Derating with  
No Heat Sink; Either Orientation  
Note that the natural convection condition was mea-  
sured at 0.05 m/s to 0.1 m/s (10 ft./min. to 20 ft./min.);  
however, systems in which this power module may be  
used typically generate a natural convection airflow  
rate of 0.3 m/s (60 ft./min.) due to other heat dissipating  
components in the system. The use of Figure 19 is  
shown in the following example.  
10  
9
8
7
6
Example  
5
4
3
2
1
0
VI = 36 V  
VI = 28 V  
VI = 18 V  
What is the minimum airflow necessary for a JFC100C  
operating at VI = 28 V, an output current of 6.7 A, and a  
maximum ambient temperature of 40 °C?  
Solution  
0.0  
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
Given: VI = 28 V  
IO = 6.7 A  
OUTPUT CURRENT, IO (A)  
8-1782 (C)  
TA = 40 °C  
Figure 20. JFC050C Power Dissipation vs. Output  
Current at 25 °C  
Determine PD (Use Figure 21.):  
PD = 15.5 W  
Determine airflow (v) (Use Figure 19.):  
v = 1.75 m/s (350 ft./min.)  
14  
Tyco Electronics Corp.  
Data Sheet  
October 1999  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
thermal-conductive dry pad between the case and the  
heat sink to minimize contact resistance. The use of  
Figure 22 is shown in the following example.  
Thermal Considerations (continued)  
Heat Transfer Without Heat Sinks (continued)  
8
18  
16  
7
6
5
4
3
2
1
0
1 1/2 IN. HEAT SINK  
1 IN. HEAT SINK  
1/2 IN. HEAT SINK  
1/4 IN. HEAT SINK  
NO HEAT SINK  
14  
12  
10  
8
VI = 36 V  
6
4
VI = 28 V  
VI = 18 V  
2
0
0
0.5  
(100)  
1.0  
(200)  
1.5  
(300)  
2.0  
(400)  
2.5  
3.0  
0
1
2
3
4
5
6
(500) (600)  
OUTPUT CURRENT, I O (A)  
AIR VELOCITY, IN m/s (ft./min.)  
8-1781 (C)  
8-1153 (C).a  
Figure 21. JFC100C Power Dissipation vs. Output  
Figure 22. Case-to-Ambient Thermal Resistance  
Curves; Either Orientation  
Current at 25 °C  
Heat Transfer with Heat Sinks  
Example  
The power module has through-threaded, M3 x 0.5  
mounting holes, which enable heat sinks or cold plates  
to attach to the module. The mounting torque must not  
exceed 0.56 N/m (5 in./lb.). For a screw attachment  
from the pin side, the recommended hole size on the  
customers PWB around the mounting holes is  
0.130 ± 0.005 inches. If a larger hole is used, the  
mounting torque from the pin side must not exceed  
0.25 N/m (2.2 in./lb.).  
If an 85 °C case temperature is desired, what is the  
minimum airflow necessary? Assume the JFC100C  
module is operating at VI = 28 V and an output current  
of 6.7 A, maximum ambient air temperature of 40 °C,  
and heat sink of 1/2 inch.  
Solution  
Given: VI = 28 V  
IO = 6.7 A  
Thermal derating with heat sinks is expressed by using  
the overall thermal resistance of the module. Total  
module thermal resistance (θca) is defined as the max-  
imum case temperature rise (TC, max) divided by the  
module power dissipation (PD):  
TA = 40 °C  
TC = 85 °C  
Heat sink = 1/2 inch  
Determine PD by using Figure 21:  
PD = 15.5 W  
(TC TA)  
TC, max  
--------------------  
------------------------  
=
θca =  
PD  
PD  
Then solve the following equation:  
The location to measure case temperature (TC) is  
shown in Figure 18. Case-to-ambient thermal resis-  
tance vs. airflow for various heat sink configurations is  
shown in Figure 22. These curves were obtained by  
experimental testing of heat sinks, which are offered in  
the product catalog.  
(TC TA)  
------------------------  
PD  
θca =  
θca =  
(85 40)  
-----------------------  
15.5  
These measured resistances are from heat transfer  
from the sides and bottom of the module as well as the  
top side with the attached heat sink; therefore, the  
case-to-ambient thermal resistances shown are gener-  
ally lower than the resistance of the heat sink by itself.  
The module used to collect the data in Figure 22 had a  
θca = 2.9 °C/W  
Use Figure 22 to determine air velocity for the 1/2 inch  
heat sink. The minimum airflow necessary for the  
JFC100C module is about 1.15 m/s (230 ft./min.).  
Tyco Electronics Corp.  
15  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
This equation assumes that all dissipated power must  
be shed by the heat sink. Depending on the user-  
defined application environment, a more accurate  
model, including heat transfer from the sides and bot-  
tom of the module, can be used. This equation pro-  
vides a conservative estimate for such instances.  
Thermal Considerations (continued)  
Custom Heat Sinks  
A more detailed model can be used to determine the  
required thermal resistance of a heat sink to provide  
necessary cooling. The total module resistance can be  
separated into a resistance from case-to-sink (θcs) and  
sink-to-ambient (θsa) shown below (Figure 23).  
EMC Considerations  
For assistance with designing for EMC compliance,  
please refer to the FLTR100V10 data sheet  
(DS98-152EPS).  
TC  
TS  
TA  
PD  
θcs  
θsa  
8-1304 (C)  
Layout Considerations  
Figure 23. Resistance from Case-to-Sink and  
Sink-to-Ambient  
Copper paths must not be routed beneath the power  
module mounting inserts. For additional layout guide-  
lines, refer to the FLTR100V10 data sheet  
(DS98-152EPS).  
For a managed interface using thermal grease or foils,  
a value of θcs = 0.1 °C/W to 0.3 °C/W is typical. The  
solution for heat sink resistance is:  
(TC TA)  
------------------------  
θsa =  
θcs  
PD  
16  
Tyco Electronics Corp.  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Outline Diagram  
Dimensions are in millimeters and (inches).  
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.)  
x.xx mm ± 0.25 mm (x.xxx in. ± 0.010 in.)  
Top View  
57.9 (2.28) MAX  
61.0  
(2.40)  
MAX  
Side View  
SIDE LABEL*  
12.7 ± 0.5  
(0.500 ± 0.020)  
5.1 (0.20)  
MIN  
5.3 (0.21)  
MIN  
2.06 (0.081) DIA  
1.02 (0.040) DIA  
SOLDER-PLATED  
BRASS, 6 PLACES  
0.64 (0.025) SQUARE  
SOLDER-PLATED  
BRONZE, 10 PLACE  
SOLDER-PLATED BRASS,  
2 PLACES (OUTPUTAND  
+OUTPUT)  
Bottom View  
7.62  
(0.300)  
2.54 (0.100)  
MOUNTING INSERTS  
M3 x 0.5 THROUGH,  
4 PLACES  
5.1 (0.20)  
12.7 (0.50)  
VI(-)  
VO(-)  
50.8  
(2.00)  
10.16 (0.400)  
CASE  
35.56  
(1.400)  
5.08 (0.200)  
5.08 (0.200)  
5.08 (0.200)  
SYNC OUT  
SENSE()  
SENSE(+)  
VoTRIM  
SYNC IN  
ON/OFF  
TEMPWARN  
OCTRIM  
OVTRIM  
12.70  
(0.500)  
PWRGOOD  
CURMON  
PARALLEL  
S-ON/OFF  
10.16 (0.400)  
VI(+)  
VO(+)  
4.8  
(0.19)  
48.3 (1.90)  
8-1397 (C).b  
* Side label includes Tyco name, product designation, safety agency markings, input/output voltage and current ratings, and bar code.  
Note: The control pins are on a 2.54 mm (0.100 in.) grid.  
Tyco Electronics Corp.  
17  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Recommended Hole Pattern  
Component-side footprint.  
Dimensions are in millimeters and (inches).  
PARALLEL  
PWRGOOD  
OCTRIM  
S-ON/OFF  
CURMON  
OVTRIM  
TEMPWARN  
SENSE(-)  
V
O
TRIM  
SENSE(+)  
DETAIL A  
57.9 (2.28) MAX  
48.3 (1.90)  
4.8  
(0.19)  
2.54  
(0.100)  
VI(+)  
VO(+)  
35.56  
(1.400)  
35.56  
(1.400)  
ON/OFF  
SYNC IN  
5.08 (0.200)  
5.08 (0.200)  
5.08 (0.200)  
61.0  
(2.40)  
MAX  
2.54  
(0.100)  
SYNC OUT  
CASE  
5.8  
(200)  
10.16 (0.400)  
48.26 (1.900)  
VI(-)  
VO(-)  
12.7  
(0.50)  
5.1 (0.20)  
MOUNTING INSERTS  
2.54 (0.100)  
7.62  
(0.300)  
MODULE OUTLINE  
8-1397 (C).b  
18  
Tyco Electronics Corp.  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Ordering Information  
Table 5. Device Codes  
Input  
Voltage  
Output  
Voltage  
Output  
Power  
Remote  
On/Off Logic  
Device  
Code  
Comcode  
15.0 V  
15.0 V  
15.0 V  
15.0 V  
15.0 V  
15.0 V  
50 W  
75 W  
Negative  
Negative  
Negative  
Positive  
Positive  
Positive  
JFC050C1  
JFC075C1  
JFC100C1  
JFC050C  
JFC075C  
JFC100C  
TBD  
TBD  
28 V  
28 V  
28 V  
28 V  
28 V  
28 V  
100 W  
50 W  
108008947  
TBD  
75 W  
TBD  
100 W  
TBD  
Optional features can be ordered using the suffixes shown in Table 6. The suffixes follow the last letter of the device  
code and are placed in descending order. For example, the device codes for a JFC100C module with the following  
options are shown below:  
Positive logic  
JFC100C3  
JFC100C31  
JFC100C1  
Negative logic  
Negative logic and delayed current-limit shutdown  
Table 6. Device Options  
Option  
Suffix  
Negative remote on/off logic and no delayed  
current-limit shutdown  
31  
Positive remote on/off logic and no delayed  
current-limit shutdown  
3
1
Negative remote on/off logic and delayed  
current-limit shutdown  
19  
Tyco Electronics Corp.  
JFC050C, JFC075C, JFC100C Power Modules:  
dc-dc Converters; 18 to 36 Vdc Input, 15 Vdc Output; 50 W to 100 W  
Data Sheet  
October 1999  
Ordering Information (continued)  
Table 7. Device Accessories  
Accessory  
Comcode  
1/4 in. transverse kit (heat sink, thermal pad, and screws)  
1/4 in. longitudinal kit (heat sink, thermal pad, and screws)  
1/2 in. transverse kit (heat sink, thermal pad, and screws)  
1/2 in. longitudinal kit (heat sink, thermal pad, and screws)  
1 in. transverse kit (heat sink, thermal pad, and screws)  
1 in. longitudinal kit (heat sink, thermal pad, and screws)  
1 1/2 in. transverse kit (heat sink, thermal pad, and screws)  
1 1/2 in. longitudinal kit (heat sink, thermal pad, and screws)  
407243989  
407243997  
407244706  
407244714  
407244722  
407244730  
407244748  
407244755  
Dimensions are in millimeters and (inches).  
1/4 IN.  
1/2 IN.  
1/4 IN.  
1/2 IN.  
1 IN.  
1 IN.  
61  
(2.4)  
57.9  
(2.28)  
1 1/2 IN.  
1 1/2 IN.  
57.9 (2.28)  
61 (2.4)  
8-2832 (C)  
8-2833 (C)  
Figure 24. Longitudinal Heat Sink  
Figure 25. Transverse Heat Sink  
Tyco Electronics Power Systems, Inc.  
3000 Skyline Drive, Mesquite, TX 75149, USA  
+1-800-526-7819 FAX: +1-888-315-5182  
(Outside U.S.A.: +1-972-284-2626, FAX: +1-972-284-2900)  
http://power.tycoelectronics.com  
Tyco Electronics Corporation reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.  
No rights under any patent accompany the sale of any such product(s) or information.  
© 2001 Tyco Electronics Corporation, Harrisburg, PA. All International Rights Reserved.  
Printed in U.S.A.  
October 1999  
DS99-131EPS (Replaces DS97-466EPS)  
Printed on  
Recycled Paper  
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