HV9982K6-G Microchip

HV9982 Three-Channel, Closed-Loop, Switch Mode LED Drive IC Features Description HV9982 is a three-channel, closed loop, peak-current Switch mode controller for single-switch convert- mode PWM controller designed to drive a constant out- ers put current. It can be used for driving either RGB LEDs Closed loop control of output current or multiple channels of white LEDs. -Buck HV9982 includes a 40V linear regulator which provides -Boost an 8.0V supply to power the IC. The switching frequen- - SEPIC cies of the three converters are controlled by an exter- High PWM dimming ratio nal clock signal. The channels operate at a switching Internal 40V linear regulator frequency of 1/12th of the external clock frequency and are positioned 120 out-of-phase to reduce the input Constant frequency operation current ripple. Each converter is driven by a peak cur- Programmable slope compensation rent mode controller with output current feedback. Linear and PWM dimming The three output currents can be individually dimmed +0.2A/-0.4A gate drives for the switching FETs using either linear or PWM dimming. The IC also Output short circuit protection includes three disconnect FET drivers, which enable Output over voltage protection high PWM-dimming ratios and also help to disconnect Hiccup-mode protection the input in case of an output short-circuit condition. Analog control of PWM dimming HV9982 includes a Hiccup-mode protection for both open LED and short-circuit condition with automatic recovery when the fault clears. Applications RGB backlight applications Multiple string, white-LED driver applications 2014 Microchip Technology Inc. DS20005295B-page 1HV9982 TO OUR VALUED CUSTOMERS It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and enhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via E-mail at docerrors microchip.com. We welcome your feedback. Most Current Data Sheet To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: