Power Electronics

Driver IC Powers Multi-LED Strings

Supertex’s HV9925, a LED driver IC with adjustable output current and pulse width modulated (PWM) dimming, is optimized for driving multiple-LED strings in offline applications such as decorative lighting and low power lighting fixtures. An enable input facilitates PWM dimming of the entire LED load and output current can be programmed between 20 mA and 50 mA using a single resistor.

The HV9925 also includes an internal 500-V switching MOSFET and built in thermal shutdown to prevent excessive power dissipation. The IC accepts inputs of 85 Vac to 264 Vac and 20 Vdc to 400 V dc.

The HV9925 is available in an 8-pin SOIC (HV9925SG-G). Samples are available from stock. Pricing is $0.78 each for the HV9925SG-G in 1000-unit quantities.
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