ISOLATION SPECIFICATIONS
Item
Isolation voltage
Isolation resistance
Test Conditions
Tested for 1 minute and 1mA max
Test at 500VDC
Min.
3000
1000
Typ.
Max.
Units
VDC
MΩ
TYPICAL CHARACTERISTICS
OUTPUT SPECIFICATIONS
Item
Output power
Line regulation
For Vin change of
±1%(3.3V
output)
For Vin change of
±1%(Others
output)
10% to 100% load (3.3V output)
10% to 100% load (5V output)
Load regulation
10% to 100% load (9V output)
10% to 100% load (12V output)
10% to 100% load (15V output)
10% to 100% load (24V output)
Output voltage accuracy
Temperature drift
Output ripple &Noise*
Switching frequency
100% full load
20MHz
Bandwidth
E_T-1W series
F_T-1W series
24V input
Others
15
12.8
8.3
6.8
6.3
Test Conditions
Min.
0.1
Typ.
Max.
1
±1.5
±1.2
20
15
10
10
10
%
Units
W
6.0
10
See tolerance envelope
graph
±0.03
%/°C
50
75
500
100
75
100
mVp-p
kHz
Operating Temp.(
o
C)
Full load, nominal input
*Test ripple and noise by
“parallel
cable” method. See detailed operation instructions at Testing of Power
Converter section, application notes.
RECOMMENDED REFLOW SOLDERING PROFILE
2 50
Te m p eratu r e (
o
C)
2 00
1 50
1 00
50
0
Ti me ( s ec .)
Remark: The curve applies only to the hot air reflow soldering
90 Se c Ma x
( >2 2 0
o
C )
26 0 C
1 0 S ec M ax
o
RECOMMENDED CIRCUIT
Dual Output
L
Vin
Cin
GND
Si ngl e Output
L
Vin
Cin
GND
L
+Vo
Cout
220 C
o
DC DC
L Cout
0V
-Vo
L
+Vo
DC DC
(Figure 1)
Cout
0V
APPLICATION NOTE
1) Requirement on output load
To ensure this module can operate efficiently and reliably, During operation, the minimum
output load
could not be less than 10% of the full load.
If the actual output power is very
small, please connect a resistor with proper resistance at the output end in parallel to
increase the load, or use our company’s products with a lower rated output power
(E _T-W2/F_T-W2 Series).
2) Recommended testing circuit
If you want to further decrease the input/output ripple, an
“LC”
filtering network may be
connected to the input and output ends of the DC/DC converter, see (Figure 1).
It should also be noted that the inductance and the frequency of the
“LC”
filtering network
should be staggered with the DC/DC frequency to avoid mutual interference. However, the
capacitance of the output filter capacitor must be proper. If the capacitance is too big, a
startup problem might arise. For every channel of output, provided the safe and reliable
operation is ensured, the greatest capacitance of its filter capacitor sees (Table 1).
3) Output Voltage Regulation and Over-voltage Protection Circuit
The simplest device for output voltage regulation, over-voltage and over-current
protection is a linear voltage regulator with overheat protection that is connected to the input
or output end in series (Figure2).
4) Overload Protection
Under normal operating conditions, the output circuit of these products has no protection
against overload. The simplest method is to connect a self-recovery fuse in series at the
input end or add a circuit breaker to the circuit.
5) No parallel connection or plug and play
The copyright and authority for the interpretation of the products are reserved by Mornsun
GND
S ingle O utput
Vi n
GND
R EG
Dual O u tput
Vi n
R EG
REG
+Vout
0V
DC DC
REG
-Vout
REG
+Vout
DC DC
0V
(Figure2)
EXTERNAL CAPACITOR TABLE (Table 1)
Vin
Cin Single Cout
Dual Cout
Vout
(µF)
(µF)
(VDC) (µF)
Vout
(VDC)
(VDC)
3.3/5
4.7
5
10
±3.3/5
4.7
12
24
-
2.2
1
-
9
12
15
24
4.7
2.2
1
0.47
±9
±12
±15
±24
2.2
1
1
0.47
It’s not recommended to connect any external
capacitor in the application field with less than 0.5 watt
output.
Specifications subject to change without notice.
E_T-1W&F_T-1W
B/0-2010
Page 2 of 3
CRYSTEKCRYSTAL [ Crystek Corporation ]
