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TEA1771 - GreenChip PC primary control IC

Description

The TEA1771 is a primary control IC for an active clamp forward converter.

This converter enables higher duty cycles of up to 70 %.

A higher maximum duty cycle lowers the required breakdown voltage of both the primary and secondary switches, reducing the total cost of the system.

Features

  • I I I I I I I I I I I I Designed for ATX PC power supplies Universal mains operation, 90 V (AC) to 265 V (AC) Integrated start-up current source Integrated high-voltage, high-side active clamp reset switch Feed-forward regulation Enhanced efficiency in Standby mode and Normal mode OverVoltage Protection (OVP) OverCurrent Protection (OCP) Short-Winding Protection (SWP) Low external component count Soft (re)start High voltage ramp-up detection assuring Zero Voltage Switching (ZVS) of the reset swit.

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Datasheet preview – TEA1771

Datasheet Details

Part number TEA1771
Manufacturer NXP Semiconductors
File Size 193.63 KB
Description GreenChip PC primary control IC
Datasheet download datasheet TEA1771 Datasheet
Additional preview pages of the TEA1771 datasheet.

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Full PDF Text Transcription

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TEA1771 GreenChip PC primary control IC Rev. 01 — 6 February 2009 www.datasheet4u.com Product data sheet 1. General description The TEA1771 is a primary control IC for an active clamp forward converter. This converter enables higher duty cycles of up to 70 %. A higher maximum duty cycle lowers the required breakdown voltage of both the primary and secondary switches, reducing the total cost of the system. The IC is optimized for (ATX) PC power supplies. Together with the TEA1781 and TEA1782 a unique system can be made that reduces costs by integrating the standby supply. It assures high output voltage accuracy and avoids cross regulation as the output voltages are regulated separately.
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