The HV9861A, an open loop, average current mode control LED driver IC, is designed to drive LEDs using a buck topology. It is well suited for a variety of solid-state lighting applications, including TV and monitor backlighting, signage, decorative, and general lighting.
The part doesn’t produce a peak-to-average error like many LED driver ICs, and therefore, it greatly improves the accuracy and line and load regulation of the LED current. The IC provides typical current accuracy of ±3% and requires no loop compensation or high-side current sensing because of its proprietary control scheme. The internally regulated voltage (Vdd) is 7.5 V.
The part is available in SOIC-8 and SOIC-16 packages (HV9861ALG-G & HV9861ANG-G, respectively) and are pin-compatible with the company’s HV9910B and HV9961 LED drivers. (ea/1,000, HV9861ALG-G, $0.81; HV9861ANG-G $0.89 — prod qty, 4-6 weeks ARO)
By Christina Nickolas
Supertex , Sunnyvale , CA
Kenneth Vickers 408-222-4810
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