PQA30-D Datasheet, PDF (5/7 Pages) CUI INC – DC-DC CONVERTER

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CUI Inc │ SERIES: PQA30-D │ DESCRIPTION: DC-DC CONVERTER
date 07/08/2014 │ page 5 of 7
DERATING CURVES
Output Voltage ≤ 5V
With heatsink
100
Without heatsink
80
60
Safe operating area
40
20
-40 -20
0
20
40 50 60
Ambient Temperature (°C)
85 100
Output Voltage > 5V
With heatsink
100
80
Without heatsink
60
Safe operating area
40
20
-40 -20
0
20
40 55 65
85 100
Ambient Temperature (°C)
EMC RECOMMENDED CIRCUIT
Vin
GND
Figure 1
FU SE
LDM1
MOV
TVS _C0
(a)
LCM1
C Y1
VIN
+ Vo
C1
(b)
C2
EUT
LO AD
GND
0V
C Y2
TEST CONFIGURATION
Figure 2
Oscilloscope
Lin
DC DC ^Current
Cin ^Probe
Load
Table 1
Recommended external circuit components
Vin (Vdc)
24
48
FUSE choose according to input current
MOV
S14K35
S14K60
LDM1
56µH
56µH
TVS
SMCJ48A
SMCJ90A
C0
330µF/50V
330µF/100V
C1, C2
4.7µF/50V
2.2µF/100V
LCM1
1mH
1mH
CY1, CY2
1nF/2kV
1nF/2kV
Table 2
External components
Lin
4.7μH
Cin
220μF, ESR < 1.0Ω
at 100 kHz
Lin(4.7µH) Cin(220µF, ESR < 1.0Ω at 100 KHz)
Note:
1. Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance.
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