EPR-54 Datasheet, PDF (1/40 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 54 - 2.75 W Charger/Adapter Using LNK520P

Title
Engineering Prototype Report for EP-54 –
2.75 W Charger/Adapter Using LNK520P
(LinkSwitch)
Specification 85-265 VAC Input, 5.5 V, 500 mA, 2.75 W Output
Application Low Cost Charger / Adapter
Author
Power Integrations Applications Department
Document
Number
EPR-54
Date
07-May-2004
Revision
1.1
Summary and Features
• Low cost, low component count battery charger/adapter – replaces linear transformer
based solutions
• Optimized switching characteristics and low-side configuration of LNK520 minimizes
EMI
- Achieves greater than 10 dBµV margin to composite conducted limits
- No Y1 safety capacitor required for EMI compliance
- Ultra-low earth leakage current, <5 µA
• Small low cost EE16 transformer
- Provision for EE13 transformer for smaller size
• Approximate constant voltage, constant current (CV/CC) primary sensed output
characteristic
• Efficiency greater than 65% across all line/load conditions
The products and applications illustrated herein (including circuits external to the products and transformer
construction) may be covered by one or more U.S. and foreign patents or potentially by pending U.S. and foreign
patent applications assigned to Power Integrations. A complete list of Power Integrations’ patents may be found
at www.powerint.com.
Power Integrations
5245 Hellyer Avenue, San Jose, CA 95138 USA.
Tel: [phone] Fax: [phone]
www.powerint.com