UCC28742 Datasheet High-Efficiency Flyback Controller

Manufacturer: Texas Instruments

Overview: Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design UCC28742 SLUSD71A – APRIL 2018 – REVISED MAY 2018 UCC28742 High-Efficiency Flyback Controller with Optocoupler Feedback.

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UCC28742 high-efficiency flyback controller by Texas Instruments - Datasheet Preview

Datasheet Details

Part number	UCC28742
Manufacturer	Texas Instruments
File Size	1.39 MB
Description	High-Efficiency Flyback Controller
Download	UCC28742 Download (PDF)

General Description

The UCC28742 off-line flyback controller is a highly integrated, 6-pin secondary-side regulated PWM controller for efficient AC-to-DC power supplies.

It is an isolated-flyback power-supply controller that provides Constant-Voltage (CV) using an optical coupler to improve transient response to large-load steps.

This device processes information from optocoupled feedback and an auxiliary flyback winding for high-performance control of output voltage and current.

Key Features

1 Opto-Coupled Feedback Enables up to 1% Regulation.
Accurate Current Limit with Overload Timeout Protection and Delayed Hiccup Response.
Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency.
80-kHz Maximum Switching Frequency.
Frequency Dithering to Ease EMI Compliance.
Clamped Gate-Drive Output for MOSFET.
Ultra-Low Start-Up Current and Large VDD Hysteresis.
High Value Start-Up Resistor.
Low Bia.

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