AN728 - Designing A Flyback Converter

Vishay

Key Features

include: D programmable start/stop D less than 5-mA supply current in UVLO mode D internal start-up circuit, programmable soft-start, and power_good output. The following sections discuss in detail design considerations for creating an efficient 800-mW flyback converter with the Si9113. Refer to the.

AN728 designing a flyback converter by Vishay - Datasheet Preview

Datasheet Details

Part number	AN728
Manufacturer	Vishay
File Size	91.57 KB
Description	Designing A Flyback Converter
Datasheet	AN728 Datasheet

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AN728 Vishay Siliconix Designing A Flyback Converter with Si9113 for Feeding the TE from U-Interface In ISDN Nitin Kalje and Tony Lai INTRODUCTION The efficiency of the converter powering the NT is extremely important, even at power levels of a few milliwatts. To achieve 60% efficiency with an 80-mW output, the allowable power loss in the converter is less than 54 mW. The components of these losses include the dc and switching losses in the semiconductors, the transformer, quiescent current overhead in the control chip, current and voltage sense networks, power losses from the ripple current through the input and output capacitor ESR, resistive losses in the PCB traces, and any external control circuit operating losses.