Adaptive synchronous rectification controller for LLC resonant converter

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  • The SRK2001A controller implements a control scheme specific for 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 directly driving N-channel power MOSFETs. Each gate driver is controlled separately and an interlock logic circuit prevents the two synchronous rectifier MOSFETs from conducting simultaneously.
    The driver high-level voltage is clamped to 11 V in order to avoid providing excessive gate charge to SR MOSFETs, in case the device is supplied at higher VCC voltages.
    The control scheme in this IC provides for each synchronous rectifier being switched on as the corresponding half-winding starts conducting and switched off as its current goes to zero.
    The turn-on logic with adaptive masking time (up to 10% of clock cycle) and innovative adaptive turn-off logic allow maximizing the conduction time of the SR MOSFETs, eliminating the need of the parasitic inductance compensation circuit.
    The low consumption mode of the device allows to meet the most stringent requirement for converter power consumption in light-load and no load conditions.
    A noticeable feature is the very low external component count required.

    主要特性

    • Secondary side synchronous rectification controller optimized for LLC resonant converter
    • Dual gate driver for N-channel MOSFETs
    • Adaptive turn-off logic
    • Turn-on logic with adaptive masking time
    • Auto-compensation of parasitic inductance
    • Low consumption mode: 50 μA quiescent current
    • VCC operating voltage range 4.5 V to 32 V
    • High voltage drain-to-source Kelvin sensing for each SR MOSFET
    • Operating frequency up to 500 kHz
    • Programmable exit load levels from burst-mode
    • SSOP10 package

样片和购买

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SRK2001ATR SSOP 10 Tape And Reel
批量生产
0.836 1000 EAR99 MOROCCO 查看供货情况

Distributor availability ofSRK2001ATR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 15738 1 Order Now
MOUSER WORLDWIDE 14716 1 Order Now
Farnell Element14 EUROPE 1925 1 Order Now

代理商库存报告日期: 2019-11-20

代理商名称

DIGIKEY

库存

15738

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

14716

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1925

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-20

立即购买
SRK2001A SSOP 10 Tube
批量生产
0.836 1000 EAR99 - 查看供货情况

Distributor availability ofSRK2001A

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 2000 1 Order Now
Newark Element14 AMERICA 475 0 Order Now
MOUSER WORLDWIDE 1729 1 Order Now
Farnell Element14 EUROPE 1284 1 Order Now

代理商库存报告日期: 2019-11-20

代理商名称

DIGIKEY

库存

2000

Min.Order

1

地区

WORLDWIDE Order Now

Newark Element14

库存

475

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

1729

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1284

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-20

立即购买

SRK2001ATR

封装

SSOP 10

包装类型

Tape And Reel

单价(US$)

0.836*

Distributor availability ofSRK2001ATR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 15738 1 Order Now
MOUSER WORLDWIDE 14716 1 Order Now
Farnell Element14 EUROPE 1925 1 Order Now

代理商库存报告日期: 2019-11-20

代理商名称

DIGIKEY

库存

15738

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

14716

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1925

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-20

供货状态

批量生产

单价(US$)

0.836

数量

1000

ECCN (US)

EAR99

Country of Origin

MOROCCO

SRK2001A

封装

SSOP 10

包装类型

Tube

单价(US$)

0.836*

Distributor availability ofSRK2001A

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 2000 1 Order Now
Newark Element14 AMERICA 475 0 Order Now
MOUSER WORLDWIDE 1729 1 Order Now
Farnell Element14 EUROPE 1284 1 Order Now

代理商库存报告日期: 2019-11-20

代理商名称

DIGIKEY

库存

2000

Min.Order

1

地区

WORLDWIDE Order Now

Newark Element14

库存

475

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

1729

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1284

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-20

供货状态

批量生产

单价(US$)

0.836

数量

1000

ECCN (US)

EAR99

Country of Origin

-

(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商

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技术文档

    • 描述 版本 文档大小 操作
      DS11726
      Adaptive synchronous rectification controller for LLC resonant converter
      2.0
      507.31 KB
      PDF
      DS11726

      Adaptive synchronous rectification controller for LLC resonant converter

    • 描述 版本 文档大小 操作
      DT0084
      Application of SRK2001 in higher output voltage circuits with external sensing MOSFETs
      1.0
      405.25 KB
      PDF
      DT0084

      Application of SRK2001 in higher output voltage circuits with external sensing MOSFETs

演示和培训资料

    • 描述 版本 文档大小 操作
      Secondary regulation Synchronous rectification controllers
      2.35 MB
      PDF

      Secondary regulation Synchronous rectification controllers

出版刊物和宣传资料

    • 描述 版本 文档大小 操作
      Power Management Guide 06.2019
      4.89 MB
      PDF

      Power Management Guide

产品型号 供货状态 封装 等级规格 符合RoHS级别 Material Declaration**
SRK2001A
批量生产
SSOP 10 工业 Ecopack2
SRK2001ATR
批量生产
SSOP 10 工业 Ecopack2

SRK2001A

Package:

SSOP 10

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SSOP 10

Grade

Industrial

RoHS Compliance Grade

Ecopack2

SRK2001ATR

Package:

SSOP 10

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SSOP 10

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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