EPR-21 – 5 V, 30 W DC-DC Converter
19-Nov-02
Input Voltage
Item
36 VDC
48 VDC
72 VDC
Ambient
57 °C
114 °C
114.5 °C
110 °C
114 °C
110 °C
61 °C
113 °C
115 °C
112 °C
115 °C
110 °C
69 °C
113 °C
116 °C
115 °C
117 °C
110 °C
DPA-Switch (U1)
Transformer (T1)
Output Choke (L2)
Output Rectifier (D2)
Base Plate
Figure 15 – EP-21 Thermal Performance, No Heat Sink, Maximum Load, Ambient
Temperature Adjusted for 110 °C, Base Plate Temperature.
EP-21 Thermal Derating
(115 oC Maximum Baseplate, VIN = 48 V)
35
30
25
20
15
10
5
No heat sink
With heat sink
0
0
20
40
60
80
100
120
Ambient Temperature (oC)
Figure 16 – EP-21 Output Power Thermal Derating.
Power Integrations, Inc.
Tel: +1 408 414 9660 Fax: +1 408 414 9760
www.powerint.com
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