4
GLOBAL ENERGY EFFICIENCY SPECIALIST
GAQ40S3V3B
DC-DC Converter Technical Manual V1.4
Parameter
Min.
Typ.
Max.
Units
Notes & Conditions
Protection characteristics
Input undervoltage protection
Startup threshold
Shutdown threshold
Hysteresis
31
30
1
34
33
-
36
35
3
V
V
V
-
-
-
Output overcurrent protection
44
-
56
A
Hiccup mode
Output short circuit protection
-
-
-
-
Hiccup mode
Output overvoltage protection
3.9
-
4.7
V
Hiccup mode
Overtemperature protection
Threshold
Hysteresis
115
5
125
-
135
-
°
C
°
C
Self-recovery
The values are obtained by measuring the
temperature of the hottest power
component on the top surface of the
convertor
Dynamic characteristics
Overshoot amplitude
Recovery time
-
-
-
-
100
100
mV
µs
Current change rate: 0.1 A/µs
load : 25% - 50% - 25%; 50% - 75% - 50%
Overshoot amplitude
Recovery time
-
-
-
-
180
320
mV
µs
Current change rate: 1 A/µs
load : 25% - 50% - 25%; 50% - 75% - 50%
Efficiency
100% load
91.0
93.5
-
%
V
in
= 48 V; I
out
= 40 A; T
A
=25
°
C (77
°
F)
50% load
88.0
93.5
-
%
V
in
= 48 V; I
out
= 20 A; T
A
= 25
°
C (77
°
F)
20% load
75.0
87.5
-
%
V
in
= 48 V; I
out
= 8 A; T
A
= 25
°
C (77
°
F)
Isolation characteristics
Input-to-output Isolation
voltage
-
-
1500
V DC
Functional Isolation
Other characteristics
Remote on/off voltage
Low level
High level
-0.7
3.5
-
-
1.2
12
V
V
-
-
On/Off current
Low level
High level
-
-
-
-
1.0
-
mA
µA
-
-
Reliability characteristics
Mean time between failures
(MTBF)
-
1.5
-
Million
hours
Telcordia SR332; 80% load; Airflow =
1.5m/s (300 LFM); T
A
= 40
°
C (104
°
F)
Electrical Specifications
Conditions: T
A
= 25
°
C (77
°
F), Airflow = 1 m/s (200 LFM), V
in
= 48 V, unless otherwise notes.
