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RT7220E - Synchronous Rectifier Controller

Description

The RT7220E is a Synchronous Rectifier (SR) controller for Asymmetrical Half-Bridge (AHB) converters operating in Critical Conduction Mode (CRM), Cycle Skipping Mode (CSM), and Burst Mode (BM).

The RT7220E detects the drain voltage of the MOSFET to control the on/off state of the SR gate.

Features

  • Suitable for Low-Side SR Control of AHB in CRM, CSM, and BM.
  • Suitable for 5V to 48V VOUT Range.
  • Double Pulses Function to Optimize Efficiency (Works with the AHB Controller RT7795).

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Datasheet preview – RT7220E

Datasheet Details

Part number RT7220E
Manufacturer Richtek
File Size 0.99 MB
Description Synchronous Rectifier Controller
Datasheet download datasheet RT7220E Datasheet
Additional preview pages of the RT7220E datasheet.

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Full PDF Text Transcription

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RT7220E Synchronous Rectifier Controller for Asymmetrical HalfBridge Converters with a Wide Output Voltage Operating Range 1 General Description The RT7220E is a Synchronous Rectifier (SR) controller for Asymmetrical Half-Bridge (AHB) converters operating in Critical Conduction Mode (CRM), Cycle Skipping Mode (CSM), and Burst Mode (BM). The RT7220E detects the drain voltage of the MOSFET to control the on/off state of the SR gate. This functionality is intended to minimize turn-off dead-time and deliver sine-wave energy through the SR gate pulses, enhancing efficiency. The RT7220E supports a wide output voltage range from 5V to 48V, and a HV LDO is built-in for the MOSFET gate driver at low output voltage.
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