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HV9982 Datasheet(PDF) 1 Page - Microchip Technology |
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HV9982 Datasheet(HTML) 1 Page - Microchip Technology |
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1 / 20 page  2014-2026 Microchip Technology Inc. and its subsidiaries DS20005295C-page 1 HV9982 Features • Switch mode controller for single-switch convert- ers • Closed loop control of output current - Buck - Boost - SEPIC • High PWM dimming ratio • Internal 40V linear regulator • Constant frequency operation • Programmable slope compensation • Linear and PWM dimming • +0.2A/-0.4A gate drives for the switching FETs • Output short circuit protection • Output over voltage protection • Hiccup-mode protection • Analog control of PWM dimming Applications • RGB backlight applications • Multiple string, white-LED driver applications Description HV9982 is a three-channel, closed loop, peak-current mode PWM controller designed to drive a constant out- put current. It can be used for driving either RGB LEDs or multiple channels of white LEDs. HV9982 includes a 40V linear regulator which provides an 8.0V supply to power the IC. The switching frequen- cies of the three converters are controlled by an exter- nal clock signal. The channels operate at a switching frequency of 1/12th of the external clock frequency and are positioned 120° out-of-phase to reduce the input current ripple. Each converter is driven by a peak cur- rent mode controller with output current feedback. The three output currents can be individually dimmed using either linear or PWM dimming. The IC also includes three disconnect FET drivers, which enable high PWM-dimming ratios and also help to disconnect the input in case of an output short-circuit condition. HV9982 includes a Hiccup-mode protection for both open LED and short-circuit condition with automatic recovery when the fault clears. Three-Channel, Closed-Loop, Switch Mode LED Drive IC Obsolete Device |
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Similar Description - HV9982 |
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