Adaptive synchronous rectification controller for flyback converter

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  • The SRK1000 is a controller intended for secondary side synchronous rectification (SR) in flyback converters, suitable for operation in QR and mixed CCM/DCM fixed frequency circuits.

    It provides a high-current gate-drive output, capable of driving N-channel Power MOSFETs.
    The control scheme of this IC is such that the SR MOSFET is switched on as soon as current starts flowing through its body diode and it is then switched off as current approaches zero.
    The fast turn-on, with minimum delay, and the innovative adaptive turn-off logic allow maximizing the conduction time of the SR MOSFET and eliminating the effect of parasitic inductance in the circuit.
    The device enters low consumption mode when it detects primary controller burst-mode operation, or when the SR MOSFET conduction becomes lower than the programmed minimum TON. In this way, converter efficiency improves at light load where synchronous rectification is no longer beneficial.
    After the converter restarts switching or the IC detects that the current conduction in the rectifiers has increased 20% above the min TON programmed value, the IC exits low consumption mode and resumes switching operation.

    主な特徴

    • Secondary side synchronous rectification controller optimized for flyback converter
    • Suitable for QR and mixed CCM/DCM fixed frequency operation
    • Wide Vcc operating voltage range 3.75 to 32 V
    • CC regulation operation down to 2 V output supported
    • Very low quiescent current in low consumption mode (160 μA)
    • High-voltage sensing input for SR MOSFET drain-source voltage (100 V AMR)
    • Operating frequency up to 300 kHz
    • High-current gate-drive output for N-MOSFET
    • Fast turn-on with minimum delay time and adaptive turn-off logic
    • Programmable min. TON and fixed min. TOFF (3 options: SRK1000, SRK1000A, SRK1000B)
    • Low consumption mode entry by primary side burst-mode detection or by detection of SR MOSFET conduction lower than programmed min TON
    • SOT23-6L package

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SRK1000ATR SOT23-6L Tape And Reel
Active
0.26 1000 EAR99 - 在庫チェック

Distributor availability ofSRK1000ATR

代理店名
地域 在庫 最小発注 Third party link
DIGIKEY WORLDWIDE 2946 1 Order Now
AVNET AMERICA 3000 0 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
MOUSER WORLDWIDE 2897 1 Order Now

代理店レポートによる在庫データ: 2019-12-13

代理店名

DIGIKEY

在庫

2946

Min.Order

1

地域

WORLDWIDE Order Now

AVNET

在庫

3000

Min.Order

0

地域

AMERICA Order Now

FUTURE

在庫

3000

Min.Order

3000

地域

WORLDWIDE Order Now

MOUSER

在庫

2897

Min.Order

1

地域

WORLDWIDE Order Now

代理店レポートによる在庫データ: 2019-12-13

サンプル入手

SRK1000ATR

パッケージ

SOT23-6L

梱包タイプ

Tape And Reel

Unit Price (US$)

0.26*

Distributor availability ofSRK1000ATR

代理店名
地域 在庫 最小発注 Third party link
DIGIKEY WORLDWIDE 2946 1 Order Now
AVNET AMERICA 3000 0 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
MOUSER WORLDWIDE 2897 1 Order Now

代理店レポートによる在庫データ: 2019-12-13

代理店名

DIGIKEY

在庫

2946

Min.Order

1

地域

WORLDWIDE Order Now

AVNET

在庫

3000

Min.Order

0

地域

AMERICA Order Now

FUTURE

在庫

3000

Min.Order

3000

地域

WORLDWIDE Order Now

MOUSER

在庫

2897

Min.Order

1

地域

WORLDWIDE Order Now

代理店レポートによる在庫データ: 2019-12-13

製品ステータス

Active

Unit Price (US$)

0.26

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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    • 製品型番

      SRK1000A adaptive synchronous rectification controller for flyback converter demonstration board with logic level SR MOSFET

      SRK1000A adaptive synchronous rectification controller for flyback converter demonstration board with STF80N10F7

00 ファイルがダウンロード用に選択されています

技術文書

    • 概要 Version Size Action
      DS12787
      Adaptive synchronous rectification controller for flyback converter
      3.0
      1.26 MB
      PDF
      DS12787

      Adaptive synchronous rectification controller for flyback converter

    • 概要 Version Size Action
      AN5066
      SRK1000/A/B adaptive synchronous rectification controller for flyback converters evaluation board family
      1.0
      1.77 MB
      PDF
      AN5066

      SRK1000/A/B adaptive synchronous rectification controller for flyback converters evaluation board family

    • 概要 Version Size Action
      AN5066
      SRK1000/A/B adaptive synchronous rectification controller for flyback converters evaluation board family
      1.0
      1.77 MB
      PDF
      AN5066

      SRK1000/A/B adaptive synchronous rectification controller for flyback converters evaluation board family

プレゼンテーション & トレーニング資料

    • 概要 Version Size Action
      Secondary regulation Synchronous rectification controllers
      2.35 MB
      PDF

      Secondary regulation Synchronous rectification controllers

関連資料

    • 概要 Version Size Action
      Power Management Guide 06.2019
      3.86 MB
      PDF

      Power Management Guide

製品型番 製品ステータス パッケージ グレード RoHSコンプライアンスグレード Material Declaration**
SRK1000ATR
Active
SOT23-6L インダストリアル Ecopack2

SRK1000ATR

Package:

SOT23-6L

Material Declaration**:

Marketing Status

Active

Package

SOT23-6L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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