LC5525F集成电路（IC）的LED驱动器规格书PDF中文资料

LC5525F属于集成电路（IC）的LED驱动器。由三垦电气株式会社制造生产的LC5525FLED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。

Introduction

The LC5500 series is the power IC for the isolated type LED driver which has an incorporated power MOSFET, designed for input capacitorless applications, and making it possible for systems to comply with the harmonics standard (IEC61000-3-2 class C). The controller adapts the average current control method for realizing high power factors, and the quasi-resonant topology contributes to high efficiency and low EMI noise. The series is housed in either DIP8 or TO-220F-7L packages, depending on output power capability. The rich set of protection features helps to realize low component counts, and high performance-to-cost power supply.

Features and Benefits

• DIP8 package (LC551xD/LC552xD) and TO-220F-7L package (LC552xF)

• Integrated on-width control circuit (it realizes high power factor by average current control)

• Integrated startup circuit (no external startup circuit necessary)

• Integrated soft-start circuit (reduces power stress during start-up on the incorporated power MOSFET and output rectifier)

• Integrated bias assist circuit (improves the startup performance, suppresses VCC voltage droop during operation, allows reduction of VCC capacitor value as well as use of a ceramic capacitor)

• Integrated Leading Edge Blanking (LEB) circuit

• Integrated maximum on-width limit circuit

• Dual-chip structure, with an avalanche-guaranteed power MOSFET (allows simplified surge suppressing circuits)

• Protection features:

▫ Overcurrent protection (OCP): pulse-by-pulse

▫ Overvoltage protection (OVP): auto restart, OVP activating pins vary by product series:

▫ Overload protection (OLP): auto restart

▫ Thermal shutdown (TSD): halts switching operation and latches in the off-state