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NEX81801DA - Adaptive Synchronous Rectifier Controller

Description

The NEX81801DA and NEX81802DA (NEX81801/2DA) are high performance synchronous rectification controllers used in switching mode power supplies.

It supports operation in Discontinuous Conduction Mode (DCM), Continuous Conduction Mode (CCM) and quasi-resonant flyback converters.

Features

  • Supports DCM, CCM, QR operation.
  • Supports up to 800 kHz switching frequency.
  • Standard and logic level MOSFET driving capability.
  • Wide output range down to 0 V with 2-channel VCC supply.
  • No need for auxiliary winding for high-side or low- side rectification.
  • Smart proportional gate driver for fast SR turn-off at CCM.
  • Adjustable turn-on blanking time for increased noise immunity.
  • Proprietary adaptive turn-on detection prevent.

📥 Download Datasheet

Datasheet Details

Part number NEX81801DA
Manufacturer nexperia
File Size 801.79 KB
Description Adaptive Synchronous Rectifier Controller
Datasheet download datasheet NEX81801DA Datasheet

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Full PDF Text Transcription

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TSOT23-6 NEX81801DA; NEX81802DA Adaptive Synchronous Rectifier (SR) Controller Rev. 2 — 16 April 2025 Product data sheet 1. General description The NEX81801DA and NEX81802DA (NEX81801/2DA) are high performance synchronous rectification controllers used in switching mode power supplies. It supports operation in Discontinuous Conduction Mode (DCM), Continuous Conduction Mode (CCM) and quasi-resonant flyback converters. The NEX81801/2DA regulates the forward drop voltage of an external synchronous rectifier (SR) MOSFET in two stages. This allows the SR FET to turn off quickly when the VDS becomes positive.
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