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
Author
Document
Number
Date
Revision
Low Cost Charger / Adapter
Power Integrations Applications Department
EPR-54
07-May-2004
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
Power Integrations
5245 Hellyer Avenue, San Jose, CA 95138 USA.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
POWERINT [ POWER INTEGRATIONS, INC. ]
