Data Sheet
March 27, 2008
QBW018A0B Series Power Modules, DC - DC Converters:
36 – 75Vdc Input; 12Vdc Output; 18A Output Current
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute 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 the device reliability.
Parameter
Input Voltage*
Continuous
Non- operating continuous
Operating Ambient Temperature
(See Thermal Considerations section)
Storage Temperature
All
T
stg
-55
125
°C
Vdc
I/O Isolation Voltage (100% factory Hi-Pot tested)
All
1500
⎯
⎯
* Input over voltage protection will shutdown the output voltage when the input voltage exceeds threshold level.
All
V
IN
V
IN
T
A
-0.3
-0.3
-40
75
80
85
Vdc
Vdc
°C
Device
Symbol
Min
Max
Unit
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter
Operating Input Voltage
Maximum Input Current
(V
IN
=0V to 75V, I
O
=I
O, max
)
Inrush Transient
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance; V
IN
=
48V, I
O
= I
Omax
; see Figure 9)
Input Ripple Rejection (120Hz)
All
All
All
It
2
Device
Symbol
V
IN
I
IN,max
Min
36
-
-
-
-
Typ
48
-
-
24
-50
Max
75
7
1
-
-
Unit
Vdc
Adc
As
mAp-p
dB
2
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to being
part of a complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to
achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-
acting fuse with a maximum rating of 15 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 manufacturer’s data sheet for further information.
2
LINEAGE
POWER
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
