HV9982数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The HV9982 is a three-channel, closed loop, peak current mode PWM controller for driving a constant output current. It can be used for driving either RGB LEDs or multiple channels of white LEDs.The HV9982 includes a 40V linear regulator which provides an 8.0V supply to power the IC. The switching frequencies of the three converters are controlled by an external clock signal. The channels operate at a switching frequency of 1/12th of the external clock frequency and are positioned 120O out-of-phase to reduce the input current ripple. Each converter is driven by a peak current 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.

特性 Features

• Switch mode controller for single-switch converters
• 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

简介

HV9982属于集成电路（IC）的LED驱动器。由制造生产的HV9982LED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。