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This literature is subject to all applicable copyright laws and is not for resale in any manner.FL77904 Phase-cut Dimmable Compact LED Direct AC Driver July 2016 FL77904 Phase-cut Dimmable Compact LED Direct AC Driver Description Features The FL77904 is a direct AC line LED driver with a The simplest Direct AC LED Driver with Only Two minimal number of external RC passive components. In External RC Passive Components normal configuration, one resistor adjusts LED current Wide AC Input Range: 90~305 V AC for desired system luminance and another bypass capacitor provides a stable voltage to an internal biasing Four Integrated High-Voltage LED Constant shunt regulator. Current Sinks of up to 75 mA RMS Input Current Capability The FL77904 provides phase-cut dimming with wide dimming range, smooth dimming control and good High Power Factor (above 0.98 in normal dimmer compatibility. Optimized levels of each LED configuration) Low Harmonic Content (THD under 20% in normal configuration) strings current regulation achieve over 0.98 high PF and less than 20% low THD which makes the FL77904 Low Flicker Index by Self Valley Fill with No suitable for high-efficiency LED lighting systems. The Degradation of PF and THD FL77904 can be also used with a simple rheostat Adjustable LED Power with an External Current dimmer switches which are suitable for desktop or Sense Resistor indoor lamps. TRIAC Dimmable (Leading/Trailing Edge) Flicker index is significantly improved by using proprietary self valley fill technique without degrading Rheostat Dimmable Flexible LED Forward Voltage PF and THD. The cost effective solution brings low line Configuration ripple light quality with system compactness. Power Scalability with Multiple Driver ICs Operation of FL77904 admits driving higher-wattage Over-Temperature Protection (OTP) systems, such as street lights and down lights, by Compact SOIC 8-Lead Package simply parallel connecting the driver ICs. Applications General LED Driving Solution for Residential, Commercial and Industrial Lighting Ordering Information Operating Packing Part Number Package Temperature Range Method 8-Lead, Small Outline Integrated Circuit FL77904MX -40 to 125C (SOIC) JEDEC MS012 150 Narrow Body, 2,500 per Reel Exposed Pad 2016 Fairchild Semiconductor Corporation www.fairchildsemi.com FL77904 Rev. 1.1