PQA50-T Datasheet, PDF (5/7 Pages) CUI INC – DC-DC CONVERTER

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CUI Inc │ SERIES: PQA50-T │ DESCRIPTION: DC-DC CONVERTER
date 07/15/2015 │ page 5 of 7
DERATING CURVES
Output Voltage ≤ 5Vdc
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
Figure 1
Vin
C0
GND
LCM
CY 1
Vin
+Vo
Cout
DC /D C
GND
0V
CY 2
LO A D
Output Voltage > 5Vdc
With heatsink
100
Without heatsink
80
60
Safe operating area
40
20
-40 -20
0
20
40
60 70 85 100
Ambient Temperature (°C)
Table 1
Recommended external circuit components
Vin (Vdc)
24
48
C0
330μF/50V
330μF/100V
CY1, CY2 1nF/2kV
1nF/2kV
LCM
2.2mH
2.2mH
Note: 1. See Table 3 for Cout values.
TEST CONFIGURATION
Figure 2
Oscilloscope
Lin
DC DC ^Current
Cin ^Probe
Load
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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