10
GLOBAL ENERGY EFFICIENCY SPECIALIST
Qualification Testing
GAQ37S12B-4
DC-DC Converter Technical Manual V1.0
Parameter
Units
Condition
High Accelerated Life
Test (HALT)
3
Low temperature limit : -60
°
C (-76
°
F); high temperature limit: 110
°
C
(230
°
F); vibration limit: 40 G
Temperature Humidity
Bias (THB)
8
Maximum input voltage; 85
°
C (185
°
F); 85% RH; 1000 operating
hours under lowest load power
High Temperature
Operation Bias (HTOB)
8
Rating input voltage; air flow:0.5 m/s (100 FLM) to 5 m/s (1000 FLM);
ambient temperature b45
°
C (+113
°
F) and +55
°
C (+131
°
F);
1000 operating hours; 50% to 80% load
Power and Temperature
Cycling Test (PTC)
8
Rating input voltage; air flow:0.5 m/s (100 FLM) to 5 m/s (1000 FLM);
ambient temperature between -40
°
C (-40
°
F) and +85
°
C (+185
°
F);
1000 operating hours ; 50% load; temperature slope: 15
°
C (59
°
F) per
minute;
dwell time: 22 minutes
Figure 20 shows the EMC test set-up diagram. The acceptance standard is required as the conducted
emission limits of CISPR22 Class A with 6 dB margin.
EMC
Figure 20: EMC test set-up diagram
RV1,RV2: Varistor, 100 V, 4500 A
D2: Gas discharge tube, 90 V, 10 kA
CI1: Aluminum electrolytic capacitor, 450 µF
CO1: Non-solid radial lead aluminum electrolytic capacitor, 2 x 470 µF
CX1,CX2,CX3: Metalized film capacitor, 1uF, 275 V
CY1,CY2: Metalized film capacitor, 0.1uF, 275 V
CY3,CY4: Chip multilayer ceramic capacitor, 1000 V, 22
ηF
R1, R2: Chip thick film resistor, 1 W, 1Ω
T1: Common mode inductor, single phase, 400 µH
