HV9961LG-G Microchip

HV9961 LED Driver with Average-Current Mode Constant-Current Control Features General Description The HV9961 is an Average-Current mode Fast Average Current Control constant-current control LED driver IC operating in a Programmable Constant Off-time Switching constant Off-time mode. Unlike the HV9910B, this Linear Dimming Input control IC does not produce a peak-to-average error. PWM Dimming Input This greatly improves accuracy as well as the line and Output Short-circuit Protection with Skip Mode load regulations of the LED current without any need for loop compensation or high-side current sensing. Its 40C to +125C Ambient Operating output LED current accuracy is 3%. Temperature Pin-compatible with HV9910B The IC is equipped with a current limit comparator for Hiccup mode output short-circuit protection. Applications The HV9961 can be powered from an 8V450V supply. It has a PWM dimming input that accepts an external DC/DC or AC/DC LED Driver Applications control TTL-compatible signal. In addition, the output LED Backlight Driver for LCD Displays current can be programmed by an internal 275 mV General Purpose Constant-current Source reference or controlled externally through a 0V1.5V LED Signage and Displays linear dimming input. Architectural and Decorative LED Lighting The HV9961 is pin-to-pin compatible with HV9910B, LED Street Lighting and it can be used as a drop-in replacement for many applications to improve LED current accuracy and regulation. Package Types 16-lead SOIC (Top view) VIN 1 16 NC NC 2 15 NC 8-lead SOIC NC 3 14 RT (Top view) CS 4 13 LD VIN 1 8 RT GND 5 12 VDD 7 CS 2 LD NC 6 11 NC GND 3 6 VDD NC 7 10 NC 5 GATE 4 PWMD GATE 8 9 PWMD See Table 2-1 for pin information. 2017 Microchip Technology Inc. DS20005588A-page 1HV9961 Functional Block Diagram Regulator VDD VIN UVLO POR 0.15/0.20V MIN (V 0.185, 0.275V) LD LD GATE Auto-REF Average Current L/E Control Logic CS Blanking IN OUT PWMD R Q 0.44V GND S Q Hiccup CLK T OFF Current Timer RT Mirror 400s HV9961 i DS20005588A-page 2 2017 Microchip Technology Inc.