ST Life.augmented

SRK2000

SYNCHRONOUS RECTIFIER SMART DRIVER FOR LLC RESONANT CONVERTER
  • active Active

The SRK2000 smart driver implements a control scheme specific to secondary-side synchronous rectification in LLC resonant converters that use a transformer with center-tap secondary winding for full-wave rectification.

It provides two high current gate drive outputs, each capable of driving one or more N-channel Power MOSFETs. Each gate driver is controlled separately and an interlocking logic circuit prevents the two synchronous rectifier MOSFETs from conducting simultaneously.

The control scheme in this IC allows for each synchronous rectifier to be switched on as the corresponding half-winding starts conducting and switched off as its current goes to zero. A unique feature of this IC is its intelligent automatic sleep mode. It allows the detection of a low-power operating condition for the converter and puts the IC into a low consumption sleep mode where gate driving is stopped and quiescent consumption is reduced. In this way, converter efficiency improves at light load, where synchronous rectification is no longer beneficial. The IC automatically exits sleep mode and restarts switching as it recognizes that the load for the converter has increased.

A noticeable feature is the very low external component count required.

pdf Please read
Errata Sheet
pdf データシート
ダウンロード

Key Features

  • Secondary-side synchronous rectifier controller optimized for LLC resonant converters
  • Protection against current reversal
  • Safe management of load transient, light load and startup condition
  • Intelligent automatic sleep mode at light load
  • Dual gate driver for N-channel MOSFETs with 1 A source and 3.5 A sink drive current
  • Operating voltage range 4.5 to 32 V
  • Programmable UVLO with hysteresis
  • 250 μA quiescent consumption
  • Operating frequency up to 500 kHz
  • Available in SO-8 package

回路図

デザイン・リソース

トップ

Technical Documentation

Product Specifications

Description Version Size
pdf
DS6922: Synchronous rectifier smart driver for LLC resonant converters
3.0 391 KB

Application Notes

Description Version Size
pdf
AN3014: 19 V, 90 W resonant converter with synchronous rectification using the L6563H, L6599A and SRK2000
2.1 1,005 KB
pdf
AN3233: 12 V - 150 W resonant converter with synchronous rectification using the L6563H, L6599A, and SRK2000
1.0 2,155 KB
pdf
AN3303: Secondary-side rectification for an LLC resonant converter featuring the SRK2000
2.0 2,183 KB

Related Tools and Software

Related Tools and Software

製品型名 Description
EVL150W-ADP-SR 12 V - 150 W resonant converter with synchronous rectification using the L6563H, L6599A, and SRK2000

サンプル& 購入

トップ
製品型名 Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
SRK2000DActiveSO-8Tube_-.985No availability reported, please contact our Sales officeEcopack2PDF
XML
SRK2000DTRActiveSO-8Tape And Reel_-.985Distributor reported inventory date: 2014-07-28
Distributor NameRegionStockMin. order
ARROWOrder NowEUROPE25000
MOUSEROrder NowWORLDWIDE17291
Ecopack2PDF
XML

(*)ユニット当たりの推奨再販価格(米ドル建て)は、あくまで予算的な参考情報としてご利用下さい。現地通貨ベースでのお見積り、価格については 弊社セールスオフィス もしくは 販売代理店 にお問合せ下さい。
(**)弊社ホームページで入手できるMaterial Declaration(材料宣誓書)のフォームは、各パッケージ・タイプで最も一般的に使用されるパッケージに基づいた包括的な文書です。そのため、特定のデバイスについて100%正確ではない可能性があります。特定のデバイスに関する情報については、 弊社セールスオフィス にお問合せ下さい。
Feedback Form
Customer Feedback