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发布者:微桥 发布时间:2012-8-3 阅读:4404次    关键字: LED
PT4213-Primary Side CC Controller


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GENERAL DESCRIPTION
    The PT4213 is a primary side regulated constant current controller, which is designed for LED lighting applications. The device is optimized for high performance and cost-effective applications. With Powtech’s proprietary constant current compensation technique accurate constant current regulation is achieved without the need of a secondary feedback circuitry. Integrated primary inductance compensation circuitry provides accurate constant current operation despite variations in primary inductance. Excellent EMI performance is achieved with frequency jittering function together with soft driving control at totem pole gate drive output.
    The device also features a complete set of protection functions to protect against all fault conditions including output open/short circuit, line under-voltage,and over temperature.
    The PT4213 is available in an SOT23-6 package.

FEATURES
CC without secondary feedback
Inductance compensation
Low startup current (<10uA)
Adjustable primary side current limit
VCC/FB over voltage protection
VCC/FB UVLO
Feedback loop open circuit protection
Over temperature protection
RoHS compliant

APPLICATIONS
Off-line High Brightness General LED Lighting
Integrated LED Lamps such as GU10, E27,
PAR20/20/38 LED Lamps

PT4213-4223参数计算>>>

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