RT7740 - Multi-Mode Flyback Controller

Description

The RT7740 series is an enhanced high-efficiency multimode PWM flyback controller, incorporating Richtek’s proprietary SmartJitterTM technology.

Features

a multi-mode control scheme, operating from continuous-conduction mode (CCM) to discontinuous-conduction mode (DCM) with valley switching, to achieve high efficiency and optimal performance. The RT7740 is a current-mode PWM controller for flyback converters. It integrates comprehensive and programmable protection features, which include propagation delay compensation, output over-voltage protection (OVP), external over-temperature protection (OTP), and bulkcapacitor brown-in/brown-out protection.

Richtek

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Datasheet Details

Part number	RT7740
Manufacturer	Richtek
File Size	397.17 KB
Description	Multi-Mode Flyback Controller
Datasheet	RT7740 Datasheet

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Full PDF Text Transcription

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® Preliminary RT7740 SmartJitterTM Multi-Mode Flyback Controller General Description The RT7740 series is an enhanced high-efficiency multimode PWM flyback controller, incorporating Richtek’s proprietary SmartJitterTM technology. The innovative SmartJitterTM technology can reduce EMI emissions of a switch-mode power supply in green mode as well as eliminate output ripple due to frequency jittering. Also, the RT7740 series features a multi-mode control scheme, operating from continuous-conduction mode (CCM) to discontinuous-conduction mode (DCM) with valley switching, to achieve high efficiency and optimal performance. The RT7740 is a current-mode PWM controller for flyback converters.

Published: Jan 20, 2025 |