Boost LED driver uses wiring fault protection
The HV9860 LED driver is designed to optimize LED performance and extend LED life in applications such as RGB or white LED backlighting, LCD TVs and monitors, and LED lamps for general lighting. The part includes LED wiring fault detection, which protects an LED string from high current in cases of accidental short circuit from any tap in the string to ground.
It uses a peak current mode control scheme and includes an internal transconductance amplifier to accurately control output current over all line and load conditions. Housed in a 16-pin SOIC package, the part features an internal ±2% voltage reference (0° to 85°C) and an internally fixed 100-kHz switching frequency. The IC also provides a disconnect switch gate drive output, which can be used to achieve good PWM rise and fall times for the LED current using an external disconnect FET. ($0.95 ea/1,000 — prod qty, 4 to 6 weeks ARO.)
By Christina Nickolas
Supertex , Sunnyvale , CA
Kenneth Vickers 408-222-4810
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