Off-line LED driver with primary-sensing up to 5W

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  • The HVLED805 is a high-voltage primary switcher intended for operating directly from the rectified mains with minimum external parts to provide an efficient, compact and cost effective solution for LED driving. It combines a high-performance low-voltage PWM controller chip and an 800V, avalanche-rugged power MOSFET, in the same package.

    The PWM is a current-mode controller IC specifically designed for ZVS (Zero Voltage Switching) fly-back LED drivers, with constant output current (CC) regulation using primary-sensing feedback. This eliminates the need for the opto-coupler, the secondary voltage reference, as well as the current sense on the secondary side, still maintaining a good LED current accuracy. Moreover it guarantees a safe operation when short circuit of one or more LEDs occurs.
    In addition, the device can also provide a constant output voltage regulation (CV): it makes the application able to work safely when the LED string opens due to a failure.
    Quasi-resonant operation is achieved by means of a transformer demagnetization sensing input that triggers MOSFET’s turn-on. This input serves also as both output voltage monitor, to perform CV regulation, and input voltage monitor, to achieve mains-independent CC regulation (line voltage feed forward).
    The maximum switching frequency is top-limited below 166 kHz, so that at medium-light load a special function automatically lowers the operating frequency still maintaining the operation as close to ZVS as possible. At very light load, the device enters a controlled burst-mode operation that, along with the built-in high-voltage start-up circuit and the low operating current of the device, helps minimize the residual input consumption.
    Although an auxiliary winding is required in the transformer to correctly perform CV/CC regulation, the chip is able to power itself directly from the rectified mains. This is useful especially during CC regulation, where the fly-back voltage generated by the winding drops.
    In addition to these functions that optimize power handling under different operating conditions, the device offers protection features that considerably increase end-product’s safety and reliability: auxiliary winding disconnection or brownout detection and shorted secondary rectifier or transformer’s saturation detection. All of them are auto restart mode.

    主要特性

    • 800 V, avalanche rugged internal power MOSFET
    • 5% accuracy on constant LED output current with primary control
    • Optocoupler not needed
    • Quasi-resonant (QR) zero voltage switching (ZVS) operation
    • Internal HV start-up circuit
    • Open or short LED string management
    • Automatic self supply
    • Input voltage feed-forward for mains independent cc regulation

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样片和购买

产品型号
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HVLED805TR
批量生产
1000 0.5112 SO-16 Tape And Reel - - EAR99
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Country of Origin:

CHINA

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Distributor availability ofHVLED805TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 2494 1 Order Now
MOUSER WORLDWIDE 2500 1 Order Now

代理商库存报告日期: 2019-12-05

代理商名称

DIGIKEY

库存

2494

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

2500

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-12-05

获取样片

HVLED805TR

供货状态

批量生产

数量

1000

单价(US$)

0.5112*

Distributor availability ofHVLED805TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 2494 1 Order Now
MOUSER WORLDWIDE 2500 1 Order Now

代理商库存报告日期: 2019-12-05

代理商名称

DIGIKEY

库存

2494

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

2500

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-12-05

单价(US$)

0.5112

封装

SO-16

包装类型

Tape And Reel

Operating Temperature (°C)

(min)

-

(max)

-

ECCN (US)

EAR99

Country of Origin

CHINA

(*) 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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相关应用

LED照明和控制

评估工具

    • 产品型号

      HVLED805 based evaluation board: 4.2 W isolated LED driver with primary side current regulation

      3.2 W LED power supply based on HVLED805

00 选择要下载的文档

技术文档

    • 描述 版本 文档大小 操作
      DS6988
      Off-line LED driver with primary-sensing
      1.1
      472.73 KB
      PDF
      DS6988

      Off-line LED driver with primary-sensing

    • 描述 版本 文档大小 操作
      AN3360
      3.2 W LED power supply based on HVLED805
      2.2
      2.8 MB
      PDF
      AN3360

      3.2 W LED power supply based on HVLED805

    • 描述 版本 文档大小 操作
      AN3360
      3.2 W LED power supply based on HVLED805
      2.2
      2.8 MB
      PDF
      AN3360

      3.2 W LED power supply based on HVLED805

出版刊物和宣传资料

    • 描述 版本 文档大小 操作
      HVLED805 on -chip solution for LED driving 2.1
      3.31 MB
      PDF
      HVLED: Lighting the future 12.2018
      700.32 KB
      PDF

      HVLED805 on -chip solution for LED driving

      HVLED: Lighting the future

产品型号 供货状态 封装 等级规格 符合RoHS级别 Material Declaration**
HVLED805TR
批量生产
SO-16 工业 Ecopack2

HVLED805TR

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-16

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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