EPR-71 Datasheet, PDF (7/28 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 71 - 6.6 W DC-DC Converter Using DPA Switch- (DPA423G)

19-Jul-2005
EP-71 3.3 V, 2 A DC-DC Power Supply
losses. Secondary output choke L2 and ceramic output capacitor C10 reduce high
frequency noise and ripple at the output.
4.4 Output Feedback
The output voltage is sensed via the resistor divider formed by R9 and R10 and fed into
the reference pin of the low voltage reference, U3. Feedback compensation components
R7, R8, and C13 ensure stable operation and optimum line and load transient response.
Capacitor C12 provides a soft-finish characteristic, preventing output voltage overshoot
during startup of the converter.
5 PCB Layout
Figure 3 - Top Side, SMT Printed Circuit Layout (Top View).
Figure 4 - Bottom Side, SMT Printed Circuit Layout (Top View).
Page 7 of 28
Power Integrations
Tel: [phone] Fax: [phone]
www.powerint.com