LED Driver IC offers channel-independent fault control.

Press Release Summary:




Suited for driving multiple strings of LEDs in backlighting applications, 3-channel switch-mode Model HV9986 includes 3 dimmer switch FET drivers that enable high PWM dimming ratios and independent fault management in case of output open- or short-circuit conditions. Device's 40 V linear regulator provides 5 V power supply to IC. Housed in 40-lead QFN package, RoHS-compliant driver features peak current mode control with channels synchronously switched 120° apart to minimize EMI.



Original Press Release:



New Three Channel LED Driver from Supertex Features Channel-Independent Fault Control



HV9986 Ideal for Driving LEDs in Backlighting Applications

SUNNYVALE, Calif., - Supertex (Nasdaq GS: SUPX), a recognized leader in high voltage analog and mixed signal integrated circuits (ICs), today introduced HV9986, a three channel switch-mode LED driver IC with three dimmer switch FET drivers that enable high PWM dimming ratios and independent fault management in case of any output open- or short-circuit conditions. The IC provides high LED current accuracy through closed loop control of the output current and is ideal for driving multiple strings of LEDs for edge lighting or backlighting in LCD TVs and monitors.

HV9986 features a 40V linear regulator that provides a 5V power supply to the IC. The switching frequencies of each channel can be controlled either with an external clock signal or by using the IC's internal oscillator. The IC features peak current mode control with the channels synchronously switched 120 degrees apart to reduce input current ripple and help minimize EMI. Gate drivers within the chip are optimized for driving logic level FETs. Each channel can be individually dimmed via linear or PWM dimming methods.

"The HV9986 offers independent fault control for each channel which is flagged to and controlled by a microcontroller," states Hernan DeGuzman, Vice President of Marketing for Supertex. "This feature offers the system designer more flexibility when considering various scenarios for LED backlighting of LCD displays and TVs."
HV9986 is available in 40-lead QFN package (HV9986K6-G). The IC is RoHS compliant. Samples of HV9986K6-G are available from stock. Lead-time for production quantities of the HV9986K6-G is 4-6 weeks ARO. Pricing is US$2.15 each for HV9986K6-G in 1K quantities.

About Supertex

Supertex, Inc. is a publicly held mixed signal semiconductor manufacturer, focused on high voltage analog and mixed signal products for use in the medical, LED lighting, imaging, industrial, and telecommunication industries. Supertex product, corporate and financial information is readily available at www.supertex.com.

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