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LED driver supports high power factor retrofit LED lamps

LED driver supports high power factor retrofit LED lamps

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By eeNews Europe



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Using pulse-frequency modulation technology and operating in boundary-conduction mode, this device provides tight current regulation to an accuracy of ±2%, while achieving a power factor of .97 and THD of less than 20%.
Helping to significantly reduce circuit BOM cost, this primary-side driver removes the need for opto-coupler, secondary-side control and loop-compensation circuitry.

Driving an external bipolar junction transistor, the AP1684 requires only a small external component count and coupled with its SO8 packaging, enables lamp designers to reduce PCB footprint, increase power density and raise overall product reliability.
The driver keeps start-up and operating currents low and uses dynamic base driver control and valley-mode switching to minimise transition loss and achieve high efficiency, typically 93%.  The AP1684’s circuit protection features are comprehensive and include over-voltage, short-circuit and over-temperature facilities.

Visit Diodes Incorporated at www.diodes.com

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