Offline PWM controller for low standby adapters

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  • The STCH03 current-mode controller isdesigned for an offline quasi-resonant ZVS (zero-voltage-switching at switch turn-on) flyback converter.

    It combines a high-performance low-voltage PWM controller chip and a 650V HV start-up cell in the same package.
    The device features a unique characteristic: it is capable of providing constant output current (CC) regulation using primary-sensing feedback. This eliminates the need for dedicated current reference IC, as well as the current sensor, still maintaining quite accurate output current regulation.
    The quasi-resonant operation is achieved by means of a transformer demagnetization sensing input that triggers the turn-on of the MOSFET, connected on the ZCD pin. This input serves also as both output voltage monitor, to achieve mains-independent CC regulation (line voltage feedforward), and to implement OVP and UVP.
    The maximum switching frequency is top-limited below 167 kHz, so that at the medium-light load a special function automatically lowers the operating frequency whilst still maintaining the operation as close to ZVS as possible. At the very light load, the device enters a controlled burst-mode operation that, along with the zero-power high-voltage start-up circuit, the extremely low quiescent current of the device, helps minimize the residual input consumption, thus meeting the requirements of the most stringent standards.
    During the burst-mode operation the VDD supply voltage has to be guaranteed by optimum application design. In any case, an innovative adaptive UVLO helps to minimize the issues related to the fluctuations of the auxiliary biasing voltage with the output load, due to parasitic capacitance of the transformer and further reducing the IC's bias consumption.
    In addition to these functions that optimize power handling under different operating conditions, the device also offers the output overvoltage protection (OVP), overtemperature protection (OTP), hiccup-mode protection that is invoked when the transformer saturates or the secondary diode fails short and the output UVP protection that limits the average output current in case of the output short-circuit. All the protections are auto-restart mode, except the OVP protection, that can be internally selected to be auto-restart or latched mode.
    The embedded leading-edge blanking on the current sense input for greater noise immunity completes the equipment of this device.

    主要特性

    • Advanced power management for ultra-low standby power consumption (under 10 mW at 230 VAC)
    • Fully integrated primary side constant current output regulation (CC)
    • 650 V embedded HV start-up circuit with zero power consumption.
    • Quasi-resonant (QR) zero-voltage-switching (ZVS) operation
    • Accurate and adjustable output OVP with options auto-restart (STCH03) or latched (STCH03L) after fault
    • Output undervoltage protection (UVP) with auto-restart
    • Input voltage feedforward compensation for mains-independent CC regulation
    • Embedded thermal shutdown
    • Intelligent frequency jitter for EMI suppression
    • SO8 package

样片和购买

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STCH03TR SO-8 Tape And Reel
Active
0.5375 1000 EAR99 CHINA 查看供货情况

Distributor availability ofSTCH03TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 2486 1 Order Now
RS COMPONENTS EUROPE 50 1 Order Now
AVNET AMERICA 2500 0 Order Now
FUTURE WORLDWIDE 190 1 Order Now
MOUSER WORLDWIDE 2438 1 Order Now

代理商库存报告日期: 2019-09-19

代理商名称

DIGIKEY

库存

2486

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1

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RS COMPONENTS

库存

50

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1

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EUROPE Order Now

AVNET

库存

2500

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0

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AMERICA Order Now

FUTURE

库存

190

Min.Order

1

地区

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MOUSER

库存

2438

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-09-19

Get sample
STCH03LTR SO-8 Tape And Reel
Active
0.5375 1000 EAR99 CHINA 查看供货情况

Distributor availability ofSTCH03LTR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 2500 1 Order Now
AVNET AMERICA 2500 0 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
MOUSER WORLDWIDE 2500 1 Order Now
Farnell Element14 EUROPE 172 1 Order Now

代理商库存报告日期: 2019-09-19

代理商名称

DIGIKEY

库存

2500

Min.Order

1

地区

WORLDWIDE Order Now

AVNET

库存

2500

Min.Order

0

地区

AMERICA Order Now

FUTURE

库存

2500

Min.Order

2500

地区

WORLDWIDE Order Now

MOUSER

库存

2500

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

172

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-19

Get sample
STCH03 SO-8 Tube
Active
0.5375 1000 EAR99 CHINA 查看供货情况

Distributor availability ofSTCH03

代理商名称
地区 库存 最小订购量 Third party link
ARROW EUROPE 5900 0 Order Now
MOUSER WORLDWIDE 1967 1 Order Now

代理商库存报告日期: 2019-09-19

代理商名称

ARROW

库存

5900

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

1967

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-09-19

Get sample
STCH03L SO-8 Tube
Active
0.5375 1000 EAR99 CHINA No availability of distributors reported, please contact our sales office

STCH03TR

封装

SO-8

包装类型

Tape And Reel

Unit Price (US$)

0.5375*

Distributor availability ofSTCH03TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 2486 1 Order Now
RS COMPONENTS EUROPE 50 1 Order Now
AVNET AMERICA 2500 0 Order Now
FUTURE WORLDWIDE 190 1 Order Now
MOUSER WORLDWIDE 2438 1 Order Now

代理商库存报告日期: 2019-09-19

代理商名称

DIGIKEY

库存

2486

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

50

Min.Order

1

地区

EUROPE Order Now

AVNET

库存

2500

Min.Order

0

地区

AMERICA Order Now

FUTURE

库存

190

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

2438

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-09-19

供货状态

Active

Unit Price (US$)

0.5375

数量

1000

ECCN (US)

EAR99

Country of Origin

CHINA

STCH03LTR

封装

SO-8

包装类型

Tape And Reel

Unit Price (US$)

0.5375*

Distributor availability ofSTCH03LTR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 2500 1 Order Now
AVNET AMERICA 2500 0 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
MOUSER WORLDWIDE 2500 1 Order Now
Farnell Element14 EUROPE 172 1 Order Now

代理商库存报告日期: 2019-09-19

代理商名称

DIGIKEY

库存

2500

Min.Order

1

地区

WORLDWIDE Order Now

AVNET

库存

2500

Min.Order

0

地区

AMERICA Order Now

FUTURE

库存

2500

Min.Order

2500

地区

WORLDWIDE Order Now

MOUSER

库存

2500

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

172

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-19

供货状态

Active

Unit Price (US$)

0.5375

数量

1000

ECCN (US)

EAR99

Country of Origin

CHINA

STCH03

封装

SO-8

包装类型

Tube

Unit Price (US$)

0.5375*

Distributor availability ofSTCH03

代理商名称
地区 库存 最小订购量 Third party link
ARROW EUROPE 5900 0 Order Now
MOUSER WORLDWIDE 1967 1 Order Now

代理商库存报告日期: 2019-09-19

代理商名称

ARROW

库存

5900

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

1967

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-09-19

供货状态

Active

Unit Price (US$)

0.5375

数量

1000

ECCN (US)

EAR99

Country of Origin

CHINA

STCH03L

封装

SO-8

包装类型

Tube

Unit Price (US$)

0.5375*

供货状态

Active

Unit Price (US$)

0.5375

数量

1000

ECCN (US)

EAR99

Country of Origin

CHINA

(*) 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

Education

This product is labeled Sustainable Technology.

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技术文档

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      DS12460
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      AN5280
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      AN5189
      15 W 5 V output USB adapter board with STCH03 CC-mode primary sensing switching controller
      1.0
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      AN5280
      36W USB charger with selectable output voltage (5-9-12 V @3A) based on STCH03L and SRK1000B
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      AN5351
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      AN5280

      36W USB charger with selectable output voltage (5-9-12 V @3A) based on STCH03L and SRK1000B

      AN5351

      EVL80WLED-STCH03: 80W-1A primary side current loop control LED driver with STCH03 for street lighting applications

      AN5164

      STEVAL-USBPD45C 45 W USB Type-C™ Power Delivery adapter

演示和培训资料

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出版刊物和宣传资料

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      STCH03 Ultra-Low Standby Power Supplies 06.2018
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      STCH03 Ultra-Low Standby Power Supplies

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产品型号 供货状态 封装 等级规格 符合RoHS级别 材料声明**
STCH03
Active
SO-8 工业 Ecopack2
STCH03L
Active
SO-8 工业 Ecopack2
STCH03LTR
Active
SO-8 工业 Ecopack2
STCH03TR
Active
SO-8 工业 Ecopack2

STCH03

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STCH03L

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STCH03LTR

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STCH03TR

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

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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