CL8801数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The CL8801 is designed to drive a long string of inexpensive, low current LEDs directly from the AC mains. A basic driver circuit consists of the CL8801, four resistors, and a bridge rectifier. Two to four additional components are optional for various levels of transient protection. No capacitors, EMI filters, or power factor correction circuits are needed.A string of series/parallel LEDs is tapped at four locations. Four linear current regulators sink current at each tap and are sequentially turned on and off, tracking the input sine wave voltage. Voltage across each regulator is minimized when conducting, providing high efficiency. Output current at each tap is individually resistor-adjustable. Cross-regulation, as the CL8801 switches from one regulator to the next, provides smooth transitions. The current waveform can be tailored to optimize for input voltage range, line/load regulation, output power/current, efficiency, power factor, THD, dimmer compatibility, and LED utilization.With the addition of an RC network, the driver is compatible with phase dimming.

特性 Features

Minimal component count (base config: CL8801 + 4 resistors + diode bridge)
No magnetics, no capacitors
Up to 7.5W output (13W w/ heat sink)
>110Lm/W using efficient LEDs
85% electrical efficiency
>0.95 power factor
Low conducted EMI w/o filters
85% LED luminous utilization
Phase dimmer compatible with an RC network

简介

CL8801属于集成电路（IC）的LED驱动器。由制造生产的CL8801LED 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。