NXP 公司的SSL1623PH是开关电源（SMPS）控制器，能直接从通用电压火线（80V-276V）整流电压工作，它集成了6.5Ω和650 V的功率开关，可调频率以方便设计，具有可调过流保护，以及欠压保护，温度保护和短路保护，主要用在LED镇流器，外观照明，LED点照明以及商业照明。本文介绍了SSL1623PH主要特性和优势，方框图以及典型应用电路图。

　　The SSL1623PH is a Switched Mode Power Supply （SMPS） controller IC that operates directly from the rectified universal AC mains. It is implemented in the high voltage Easy High Voltage Silicon-On-Insulator （EZ-HV SOI） process, combined with a low voltage Bipolar Complementary Metal Oxide Semiconductor （BiCMOS） process.

　　The SSL1623PH can operate in LED applications with a power range of up to 25 W. Applications below 15 W are more suited to the SSL152x family of mains LED drivers. In its most basic version of application the SSL1623PH acts as a voltage source. A combined voltage and current source can be realized with minimum costs for external components. Implementation of the SSL1623PH renders an efficient and low cost LED power supply system.

　　SSL1623PH主要特性和优势：

　　Integrated power switch: 6.5 Ω and 650 V

　　Operates from universal AC mains supplies, 80 V to 276 V

　　Adjustable frequency for flexible design

　　RC oscillator for load insensitive regulation loop constant

　　Valley switching for minimum switch-on loss

　　Adjustable overcurrent protection

　　Undervoltage protection

　　Temperature protection

　　Short-circuit winding protection

　　Safe restart mode for system fault conditions

　　Simple application with both primary and secondary （opto） feedback

　　SSL1623PH应用：

　　LED ballasts

　　Contour lighting

　　LED spotlights

　　Channel letter lighting

　　Down lighting

　　Commercial lighting （retail displays）

　　图1.SSL1623PH方框图

　　图2.SSL1623PH典型应用电路图-初级检测