3
GLOBAL ENERGY EFFICIENCY SPECIALIST
Parameter
Min.
Typ.
Max.
Units
Notes & Conditions
Absolute maximum ratings
Input voltage
Continuous
Transient (100 ms)
-
-
-
-
80
100
V
V
-
-
Operating ambient temperature
-40
-
85
ºC
See the thermal derating curve
Storage temperature
-55
-
125
ºC
-
Operating humidity
10
-
95
% RH
Non-condensing
External voltage applied to On/Off
-
-
12
V
-
Input characteristics
Operating input voltage
36
48
75
V
-
Maximum input current
-
-
16
A
V
in
= 36 V - 75 V; I
out
= 37 A
No-load loss
-
4.3
5
W
V
in
= 48 V; I
out
= 0 A
Input capacitance
330
470
-
µF
Aluminum electrolytic capacitor
Inrush transient
-
-
2
A²s
-
Input reflected ripple current
(peak to peak)
-
-
100
mA
Oscilloscope bandwidth: 20 MHz
Output characteristics
Output voltage set point
11.76
12.00
12.24
V
V
in
= 48 V; I
out
= 37 A
Output power
0
-
450
W
-
Output line regulation
-
-
±
0.3
%
V
in
= 36 V - 75 V; I
out
= 37 A
Output load regulation
-
-
±
0.3
%
V
in
= 48 V; I
out
= 0 - 37 A
Regulated voltage precision
-
-
±
3
%
V
in
= 36 V - 75 V; I
out
= 0 - 37 A
Temperature coefficient
-
-
±
0.02
%/
°
C
T
A
= -40
°
C to +85
°
C (-40
°
F to +185
°
F )
External capacitance
470
-
10
4
µF
470 µF: electrolytic capacitor
Output current
0
-
37
A
-
Output ripple and noise
(peak to peak)
-
100
350
mV
Oscilloscope bandwidth: 20 MHz
Output voltage Trim range
90
-
110
%
-
Output voltage overshoot
-
-
5
%
The whole range of V
in
, I
out
and T
A
Output voltage delay time
-
-
100
ms
From V
in
connection to 10%V
out
Output voltage rise time
-
50
100
ms
From 10%V
out
to 90%V
out
Switching frequency
-
150
-
kHz
-
GAQ37S12B-4
DC-DC Converter Technical Manual V1.0
Electrical Specifications
Conditions: T
A
= 25
°
C (77
°
F), Airflow = 1 m/s (200 LFM), V
in
= 48 V, unless otherwise notes.
