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HV9961LG-G

MCHPHV9961LG-G

Microchip Technology
LED Driver IC 1 Output DC DC Controller Step-Down (Buck) Analog, PWM Dimming 8-SOIC
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Overview

The HV9961LG-G is an average-current mode LED driver IC designed for high-brightness LED applications. It operates over a wide input voltage range of 8V to 450V and uses a constant off-time control scheme to maintain high current accuracy without the need for loop compensation. The device features an internal 7.5V regulator and is pin-compatible with the industry-standard HV9910B.

Why Choose This Part

The HV9961LG-G provides superior current accuracy of +/-3% through its fast average current control method, significantly improving over traditional peak-current schemes. It includes built-in short-circuit protection with skip mode and supports both linear and PWM dimming for flexible brightness control.

Applications

AC/DC LED Lighting
Driving high-voltage LED strings directly from rectified AC mains or high-voltage DC rails.
LCD Backlighting
Providing consistent current for large-format LCD panel backlights in signage and displays.
Street and Architectural Lighting
Reliable current control for outdoor lighting fixtures requiring robust over-temperature and short-circuit protection.
General Constant-Current Sources
Versatile use in any application requiring a regulated current source up to 450V input.

Key Specifications

Type DC DC Controller
Dimming Analog, PWM
Topology Step-Down (Buck)
Applications Backlight, Lighting, Signage
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Number of Outputs 1
Internal Switch(s) No
Operating Temperature -40degC ~ 125degC (TA)
Voltage - Supply (Max) 450V
Voltage - Supply (Min) 8V
Supplier Device Package 8-SOIC

Getting Started

To begin development, design a buck converter power stage based on the required LED string voltage and current. Select an external MOSFET and sense resistor to match your power requirements, ensuring the VDD pin is properly decoupled with a low-ESR capacitor. Refer to the Microchip HV9961DB1 evaluation board documentation for layout best practices regarding the high-voltage switching path.

Also Consider

HV9910B MCHPMicrochip Technology - Directly pin-compatible but uses peak-current control, suitable for applications where average-current accuracy is not critical.

Categories

Displays & Optoelectronics > LED Drivers Consumer Electronics > LED & Lighting Control