HV9912NG中文资料Switch-mode LED Driver IC With High Current Accuracy and Hiccup Mode Protection数据手册Microchip规格书

描述 Description

General Description
The  HV9912  is  a  current  mode  control  LED  driver  IC  designed to control single switch PWM converters (buck, boost, buck-boost or SEPIC) in a constant frequency mode. The controller uses a peak  current-mode  control  scheme  with  programmable  slope compensation and includes an internal transconductance amplifier
to control the output current in closed loop enabling high output current accuracy (in the case of buck and buck-boost converters, the output current can be sensed using a high side current sensor like the HV7800).

特性 Features

Switch mode controller for single switch
drivers
  ♦Buck
  ♦Boost
  ♦Buck-boost and SEPIC
Works with high side current sensors
Closed loop control of output current
High PWM dimming ratio
Internal 90V linear regulator (can be extended using external Zener diodes)
Internal 2% voltage reference
  (0°C < TA< 85°C)
Constant frequency operation
Programmable slope compensation
Linear & PWM dimming
+0.2A/-0.4A gate drive
Hiccup mode protection for both short circuit and open circuit conditions
Synchronization capability
Pin compatible with HV9911

Applications
LED backlight applications
General LED lighting applications
Battery powered LED lamps
 

简介

HV9912NG属于集成电路（IC）的LED驱动器。由Microchip制造生产的HV9912NGLED 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。