HV9803B Series

LED Driver IC w/ Average-Mode Constant Current Control

Catalog

LED Driver IC w/ Average-Mode Constant Current Control

Part	Voltage - Supply (Max) [Max]	Package / Case	Package / Case [y]	Package / Case [x]	Number of Outputs	Type	Supplier Device Package	Internal Switch(s)	Applications	Dimming	Voltage - Supply (Min) [Min]	Mounting Type	Operating Temperature [Min]	Operating Temperature [Max]
Microchip Technology HV9803LG-G	13.2 V	8-SOIC	3.9 mm	0.154 in	1	Linear	8-SOIC		Backlight Lighting	Analog PWM	7 V	Surface Mount	-40 °C	125 °C
Microchip Technology HV9803BLG-G	16 V	8-SOIC	3.9 mm	0.154 in	1	Linear	8-SOIC		Backlight Lighting	Analog PWM	7 V	Surface Mount	-40 °C	125 °C

Catalog

LED Driver IC w/ Average-Mode Constant Current Control

Key Features

• + Fast average current control

• + Correction for propagation delay and offset voltage

• + Fixed off-time switching mode

• + Linear dimming input

• + PWM dimming input

• + Output short circuit protection with programmable skip mode

• + Input under-voltage shutdown

Description

The HV9803B is an open loop average-mode current control LED driver IC operating in a constant off-time mode. The IC features ±2% current accuracy, tight line and load regulation of the LED current without any need for loop compensation or high-side current sensing. Its auto-zero circuit cancels the effect of both the input offset voltage and the propagation delay in the current sense comparator. The HV9803B can be powered from a 7.0 to 16V supply. The IC features fast PWM dimming response. The linear dimming input LD can accept a reference voltage from 0 to 3.0V. The IC is equipped with a current limit comparator for hiccup-mode output short circuit protection. It also features a programmable input under-voltage shutdown.