RT7220D - Synchronous Rectifier Controller

Description

The RT7220D is a Synchronous Rectifier (SR) controller for Flyback converters operating in Continuous Conduction Mode (CCM), Discontinuous Conduction Mode (DCM) and Quasi-Resonant (QR) mode.

Features

Suitable for Flyback Converter in CCM, DCM, and Quasi-Resonant (QR) Mode.
Suitable for 3V to 21V VOUT Range.
ZVS Function to Optimize Efficiency (Work with the Primary-Side Controller RT7757).

Richtek

📥 Download Datasheet

Datasheet Details

Part number	RT7220D
Manufacturer	Richtek
File Size	1.04 MB
Description	Synchronous Rectifier Controller
Datasheet	RT7220D Datasheet
Additional preview pages of the RT7220D datasheet.

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Full PDF Text Transcription

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RT7220D Synchronous Rectifier Controller with Zero Voltage Switching for Wide Output Voltage Operating Range 1 General Description The RT7220D is a Synchronous Rectifier (SR) controller for Flyback converters operating in Continuous Conduction Mode (CCM), Discontinuous Conduction Mode (DCM) and Quasi-Resonant (QR) mode. The RT7220D will sense the drain voltage of MOSFET to determine SR gate on/off so as to minimize turn-off dead-time and enhance efficiency. The RT7220D supports the wide output voltage range from 3V to 21V, and a HV LDO is especially built-in for the MOSFET gate driver at low output voltage. When it works with the primary-side controller RT7757, the Zero-Voltage-Switching (ZVS) control can be enabled to optimize the efficiency at high line.

Published: Dec 9, 2023 |