SY5810 SY5810ABC 一级矽力杰代理SY5810ABC假一赔十,只做真芯,量大可另行商榷
SY5810
General Description
The SY5810 is a single stage Flyback and PFC controller targeting at LED lighting applications. 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
* Primary side control eliminates the opto-coupler.
* Valley turn-on of the primary MOSFET to achieve
low switching losses
* 0.3V primary current sense reference voltage leads to a lower sense resistance thus a lower conduction loss.
* Internal high current MOSFET driver: 0.25A sourcing and 0.5A sinking
*Low start up current: 15μA typical
*Reliable short LED and Open LED protection
*Power factor >0.90 with single-stage conversion.
*Compact package: SOT23-6
高效率高PFC,SY5810,1. 集成PFC,功率因数很高, 隔离效率大部分情况下在88%、89%,高达92%,PFC 0.95到0.99, 2.原边控制QR模式,省去光耦和相关电路,降低BOM cost 3. 独特的MOSFET控制技术,对MOSFET和快恢复二极管的要求降低很多,不必选择昂贵的MOSFET和二极管, 高功率因数、精度3%以内,QR模式、 高效率、稳定性高、一致性好、外围器件少、空间小、性价比高。
