On Semi NCP1014能源之星离线8W LED驱动方案
On Semi 公司的NCP101x系列自供电单片开关电路,主要用于低待机功耗的离线开关电源(SMPS),集成了固定频率电流模式控制器和700V MOSFET,提供实现可靠低成本电源所需要功能,包括软起动,频率抖动,短路保护,跳频,最大峰值电流设定和动态自供电(不需要辅助线圈).主要用在小功率充电器适配器,USB,家用电器,TV等辅助电源.本文介绍NCP101x系列主要特性,方框图, 6.5W反激转换器和通用火线电压输入的7.0W转换器以及能源之星离线8W LED驱动器参考设计NCP1014LEDGTGEVB电路图和材料清单(BOM).
NCP1014: Self-Supplied Monolithic Switcher for Low Standby-Power Offline SMPS
The NCP101X series integrates a fixed−frequency current−mode controller and a 700 V MOSFET. Housed in a PDIP−7, PDIP−7 Gull Wing, or SOT−223 package, the NCP101X offers everything needed to build a rugged and low−cost power supply, including soft−start, frequency jittering, short−circuit protection, skip−cycle, a maximum peak current setpoint and a Dynamic Self−Supply (no need for an auxiliary winding).
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