Datasheet

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CUI Inc │ SERIES: PQA50-D │ DESCRIPTION: DC-DC CONVERTER date 07/14/2015 │ page 5 of 7
OutputVoltage≤5Vdc
Recommended external circuit components
Vin (Vdc) 24 48
C0 330μF/50V 330μF/100V
CY1, CY2 1nF/2kV 1nF/2kV
LCM 2.2mH 2.2mH
EMC RECOMMENDED CIRCUIT
DERATING CURVES
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 02040
100
Safe operating area
55 65 85
Without heatsink
With heatsink
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 02040
85 100
Safe operating area
60 70
Without heatsink
With heatsink
Output Voltage > 5Vdc
Figure 1 Table 1
Vin
GND
+Vo
0V
DC/DC
LO
AD
LCM
C0
CY
Vin
GN
D
CY 1
2
Cout
TEST CONFIGURATION
DC
Cin
Lin
DC
Load
Oscilloscope
Current
Probe
Lin(4. 7µH) Cin(220µF, ESR<1.0Ω at 100KHz)
Note: 1.Inputreected-ripplecurrentismeasuredwithaninductorLinandCapacitorCintosimulatesourceimpedance.
External components
Lin 4.7μH
Cin
220μF,ESR<1.0Ω
at 100 kHz
Figure 2 Table 2
Note: 1. See Table 3 for Cout values.
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