Analog/PWM Dimmable High Power LED Direct AC Driver

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Overview

The FL77944 is a direct AC line LED driver with a 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.
The FL77944 provides phase-cut dimming with wide dimming range, smooth dimming control and good dimmer compatibility. It achieves high efficiency with high PF and low THD, which makes the FL77944 suitable for high-efficiency LED lighting systems. The FL77944 has a dedicated DIM pin which can be used with analog or digital PWM dimming. The FL77944 can also be used with a rheostat dimmer switch which is suitable for desktop or indoor lamps.
Operation of FL77944 admits driving higher-wattage systems, such as street lights and down lights, by simply parallel connecting the driver ICs.

  • Lighting
  • LED Lighting – High Power- Analog/PWM dimming
  • LED Lighting – Low Power – Analog/PWM dimming
  • LED Lighting – Mid Power- Analog/PWM dimming
  • The simplest Direct AC LED Driver with Only Two External RC Passive Component
  • Wide AC Input Range: 90~305 VAC
  • Four Integrated High-Voltage LED Constant Current Sinks of up to 150 mA (RMS) Capability
  • TRIAC Dimmable (Leading/Trailing Edge)
  • Rheostat Dimmable
  • Analog/Digital PWM Dimming Function
  • High Power Factor (above 0.98 in normal configuration)
  • Adjustable LED Power with an External Current Sense Resistor
  • Low Harmonic Content (THD under 20% in normal configuration)
  • Flexible LED Forward Voltage Configuration
  • Power Scalability with Multiple Driver ICs
  • Over-Temperature Protection (OTP)
  • SOP16 EP Package

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FL77944MX

Obsolete

Pb

A

H

P

SOIC-16

3

260

REEL

2500

N

Direct AC Driver

18

500

500

16.9/36.1/82.8/91.7 - ILED1/2/3/4

Linear

Price N/A

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