MICROCHIP HV9803BLG-G

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 and 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 7V to 16V supply. The IC features fast PWM dimming response. The linear dimming input LD can accept a reference voltage from 0V to 3V. The IC is equipped with a current limit comparator for Hiccup-mode output short-circuit protection. It also features a programmable input undervoltage shutdown.

• 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 Undervoltage Shutdown

• Backlighting of LCD Panels
• General Lighting