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RCC充电器详解
AN2228
APPLICATION NOTE
STD1LNK60Z-based Cell Phone Battery Charger Design
Introduction
This application note is a Ringing Choke Converter (RCC)-based, step-by-step cell phone battery charger
design procedure.
The RCC is essential to the self-oscillating fly-back converter, and operates within the Discontinuous
Conduction Mode (DCM) and Continuous Conduction Mode (CCM) boundaries without noticeable
reverse recovery of the output rectifying diodes. RCC control is achieved by using discrete components to
control the peak current mode, so the overall RCC cost is relatively low compared to the conventional
Pulse Width Modulation (PWM) IC fly-back converter. As a result, RCC is widely used for low power
applications in industry and home appliances as a simple and cost-effective solution.
Figure 1. STD1LNK60Z-based RCC Printed Circuit Board
Top View Bottom View
Rev 1.0
September 2005 1/26
http:/ 26
AN2228 - APPLICATION NOTE
Table of Contents
1 Power Transformer Design Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Switching Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 STD1LNK60Z MOSFET Turn Ratio . . . . . . . . . . . . . . . . . . .
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