Microchip Technology HV9961 LED Driver with Constant Current Control

Microchip Technology HV9961 LED Driver with Constant Current Control greatly improves accuracy and line and load regulation of the LED current without any need for loop compensation or high-side current sensing. The Microchip HV9961 LED driver provides output LED current accuracy of ±3% and comes equipped with a current limit comparator for hiccup-mode output short circuit protection. The HV9961 drivers can be powered from an 8V to 450V supply and provides a PWM dimming input that accepts an external control TTL compatible signal. This LED driver IC with constant current control can be used as a drop-in replacement for many applications to improve the LED current accuracy and regulation.

Features

Switch mode controller for single switch converters
- Buck
- Boost
- Buck-boost and SEPIC
High output current accuracy
High PWM dimming ratio (>5000:1)
Internal 40V linear regulator
Internal ±2% voltage reference
Constant frequency operation with sync capability

Programmable soft start
10V GATE drivers
Hiccup mode protection for both short circuit and open circuit conditions
-40°C to +125°C operating temperature range
Package options
- SOIC-8 (4.90mm x 3.90mm x 1.75mm; 1.27 pitch)
- SOIC-16 (9.90mm x 3.90mm x 1.75mm; 1.27 pitch)

Applications

DC/DC or AC/DC LED driver applications
LED backlight driver for LCD displays
General purpose constant-current source

LED signage and displays
Architectural and decorative LED lighting
LED street sighting

LED Human-Centric Lighting

The use of standard overhead fluorescent lights that cause fatigue, eye strain, and uncomfortable working environments is waning. Recognizing that discrepancies between natural light and artificial light can have a powerful effect on human productivity and moods and can even impact overall health, many lighting designers are looking for effective solutions for implementing Human-Centric Lighting (HCL) systems using LED technology. Selecting the right LED driver is a key factor when creating an effective Human-Centric Lighting product design.

Reference Design

Application Circuit Diagram - Microchip Technology HV9961 LED Driver with Constant Current Control

This BLUETOOTH® Low Energy (BLE) LED Reference Design combines an HV9961 LED Driver with an 8-bit PIC16F15313 Microcontroller (MCU), and the RN4871 BLE Module, to create an intelligent LED lighting system solution. The RN4871 Module includes a Bluetooth 4.2 baseband controller, on-board Bluetooth stack, digital and analog I/O, and RF power amplifier into one solution.