描述 Description

The FL77905 is a direct AC line LED driver with minimal number of external RC passive components. In normal configuration, one resistor is to adjust LED power, and one capacitor is to provide a stable voltage to an internal biasing shunt regulator.
It achieves high efficiency with high PF and low THD which makes the FL77905 suitable for high-efficiency LED lighting systems. The FL77905 can also be used with a rheostat dimmer switches which are suitable for desktop or indoor lamps.
The FL77905 has a dedicated DIM pin which is designed to be used with analog or digital PWM dimming.

特性 Features

? The simplest Direct AC LED Driver with Only Two External RC Passive Components
? Wide AC Input Range: 90~305 VAC
? Analog/PWM Dimming
? High Power Factor (above 0.98 in normal configuration) Low Harmonic Content (THD under 20% in normal configuration)
? Low Flicker Index by Self Valley Fill with No Degradation of PF and THD
? Adjustable LED Power with an External Current Sense Resistor
? Rheostat Dimmable Flexible LED Forward Voltage Configuration
? Power Scalability with Multiple Driver ICs
? Over-Temperature Protection (OTP)

應用 Application

? LED 照明 — 中功率 — 模擬/PWM 調(diào)光
? LED 照明 — 中功率 — 相位切割調(diào)光
? LED 照明 — 低功率 — 相位切割調(diào)光

簡介

FL77905屬于集成電路（IC）的LED驅(qū)動器。由制造生產(chǎn)的FL77905LED 驅(qū)動器器件屬于 LED 驅(qū)動器電源管理集成電路 (PMIC) 系列，可通過標稱固定電壓的電源為負載（通常為發(fā)光二極管）提供電流，并且電流可控。它與用于電壓調(diào)節(jié)的類似產(chǎn)品的主要區(qū)別在于，這類器件提供較低的反饋電壓（以提高系統(tǒng)能效），而且通?？蓪ζ骷ぷ鼽c進行外部控制，可在照明應用中用于實現(xiàn)調(diào)光功能。