Supertex delivers sub microsecond PWM dimming with new LED driver

HV9989 drives SEPIC converters in either continuous-conduction mode (CCM) or discontinuous-conduction mode (DCM). It features independent short and open-circuit protection for each channel and three 1MHz Tran conductance amplifiers with tri-state outputs to close feedback loops and accurately control the LED current. It is powered by a built-in 40V linear regulator.

“HV9989 can operate with very high dimming frequency and deliver an over 10,000:1 dimming ratio because of its patented PWM dimming method,” said Stephen Lin, Vice President of Marketing at Supertex. “The IC combines line and load regulation in a multi-channel driver IC to reduce board space and system cost in LCD backlighting applications like flat screen TVs and monitors.”

The HV9989 is available in a 40-lead QFN package (HV9989K6-G). Samples are available from stock.

Supertex

Check Also

400W 3” x 5” medical and industrial power supplies deliver 250W convection/conduction cooled with 400W peak power for extended time periods

TDK Corporation (TSE:6762) announces the introduction of the TDK-Lambda brand CUS400M medical and industrial certified …