25 February 2015
Power Electronics / Power Management
Opto-Electronics
Fairchild announced the FL7734 phase-cut, dimmable single-stage LED driver, a highly integrated LED controller solution for low-cost and highly reliable LED lighting solutions from 5 W to 30 W. The device enables designers to quickly achieve great light quality designs with high dimmer compatibility while integrating full power factor correction circuitry to meet power factor and total harmonic distortion requirements.
The solution uses Fairchild’s unique active dimmer driving technology to eliminate visible flicker or shimmer symptoms and deliver over 90% dimmer compatibility with a variety of leading edge, trailing edge and digital dimmers from a wide range of manufacturers. The solution fully meets NEMA SSL 7A-2013 and ENERGY STAR standards and provides a programmable dimming curve and input current management flexibility.
The FL7734 is a flyback pulse-width modulator (PWM) controller that uses an advanced primary-side regulation technique, which minimises the external components required for implementation. To meet stringent LED brightness control requirements, it uses Fairchild’s innovative ‘TrueCurrent’ technology for tight constant-current variation with a tolerance of less than ±1% in the wide line voltage range.
Available in a 16-pin small-outline package (SOP), the driver can be used in a wide variety of lamps including GU10, candle lights, A19 and PAR30/38 bulbs, down and flat lights, and indoor and outdoor lights. It adds comprehensive protection features including dual over-voltage protection for both open-VS and open-VDD conditions, output diode short, and open/short protection for the current sense resistor and every pin of the control IC. It also features open-LED, short-LED and over-temperature shutdown protections.
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