SY  矽力杰SY   原装SY  真芯SY   假一赔十的品质保障,量大可另行商榷 

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　　矽力杰内置MOS恒流驱动方案.美国矽力杰.SY.SY.General Desion

　　The SY is a single stage Flyback and PFC regulator targeting at LED lighting applications. It integrates a V MOSFET to decrease physical volume .It is a primary side controller without applying any secondary feedback circuit for low cost, and drives the Flyback converter in the quasi-resonant mode to achieve higher efficiency. It keeps the Flyback converter in constant on time operation to achieve high power factor.

　　Features

　　* Integrated V MOSFET

　　* Primary side control eliminate to the opto-coupler.

　　* Valley turn-on of the primary MOSFET to achieve low switching losses

　　* .V primary current sense reference voltage leads to a lower sense resistance thus a lowerconduction loss.

　　* Low start up current: μA typical

　　* Reliable short LED and Open LED protection

　　* Power factor >. with single-stage conversion.

　　* Maximum frequency limit: kHz

　　* Compact package: SO

　　SY

　　General Desion

　　The SY is a W single stage Buck PFC controller targeting at LED lighting applications. It integrates a V MOSFET to decrease physical volume. It adopts the proprietary control architecture to achieve an accurate regulation of LED current, unity power factor, and quasi-resonant valley turn-on high efficiency operation.

　　It integrates open/short LED protection and eliminates the need for opto-coupler, thus minimizing the component count and board size.

　　Features

　　* Integrated V MOSFET

　　* Valley turn-on of the MOSFET to achieve low switching losses

　　* .V current sense reference voltage leads to a lower sense resistance thus a lower conduction loss

　　* Low start up current: μA typical

　　* Reliable short LED and Open LED protection

　　* Power factor >. with single-stage conversion.

　　*Maximum frequency limit: kHz

　　*Compact package: SO

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