LC5545LD集成电路（IC）的LED驱动器规格书PDF中文资料

LC5545LD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LC5545LDLED 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。

Description

LC5540LD series is a quasi-resonant topology switching power supply IC, designed for input capacitorless applications, and making it possible for systems to comply with the harmonics standard (IEC61000-3-2 class C). It incorporates separate controller and power MOSFET chips. 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 rich set of protection features helps to realize low component counts, and high performance-to-cost power supply.

Features and Benefits

• 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 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-time 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): latched shutdown

▫ Overload protection (OLP): latched shutdown

▫ Thermal shutdown (TSD): latched shutdown

Applications

• LED lighting fixtures

• LED light bulbs