UCC28740 Datasheet PDF - Texas Instruments Constant-Current Flyback Controller Specs

UCC28740 - Constant-Current Flyback Controller

Datasheet Summary

Description

The UCC28740 isolated-flyback power-supply controller provides Constant-Voltage (CV) using an optical coupler to improve transient response to largeload steps.

Constant-Current (CC) regulation is accomplished through Primary-Side Regulation (PSR) techniques.

Features

1 Less than 10-mW No-Load Power Capability.
Optocoupled Feedback for CV, and Primary-Side Regulation (PSR) for CC.
Enables ±1% Voltage Regulation and ±5% Current Regulation Across Line and Load.
700-V Startup Switch.
100-kHz Maximum Switching Frequency Enables High-Power-Density Charger Designs.
Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency.
Frequency Dithering to Ease EMI Compliance.
Clamped Gate-D.

Datasheet Details

Part number	UCC28740
Manufacturer	Texas Instruments
File Size	1.37 MB
Description	Constant-Current Flyback Controller
Datasheet	UCC28740 Datasheet
Additional preview pages of the UCC28740 datasheet.

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Full PDF Text Transcription

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Product Folder Order Now Technical Documents Tools & Software Support & Community UCC28740 SLUSBF3D – JULY 2013 – REVISED MARCH 2018 UCC28740 Constant-Voltage Constant-Current Flyback Controller Using Optocoupled Feedback 1 Features •1 Less than 10-mW No-Load Power Capability • Optocoupled Feedback for CV, and Primary-Side Regulation (PSR) for CC • Enables ±1% Voltage Regulation and ±5% Current Regulation Across Line and Load • 700-V Startup Switch • 100-kHz Maximum Switching Frequency Enables High-Power-Density Charger Designs • Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency • Frequency Dithering to Ease EMI Compliance • Clamped Gate-Drive Output for MOSFET • Overvoltage, Low-Line, and Overcurrent Protection Functions • SOIC-7 Package • Create a Custom Desig

Published: Apr 25, 2020 |