HV9931LG-G

Overview

The HV9931LG-G is a single-output LED lighting driver IC manufactured by Microchip Technology. It utilizes a Buck-Boost topology and operates within an input voltage range of 8 V to 200 V. The device provides a constant output current of 350 mA with adjustable output voltage. Operating at a frequency of 300 kHz, it supports PWM dimming and functions between -40°C and +85°C. Packaged in an SOIC-8 format, it features a maximum power dissipation of 630 mW and a maximum supply current of 1 mA.

Feature Summary

• Provides near unity power factor and constant current regulation using a two-stage topology driven by a single MOSFET and control IC.
• Supports triac dimming functionality when combined with components for preloading and inrush current shaping.

Applications

• Low to medium power LED lighting applications
• Non-isolated LED string driving
• AC input LED drivers (100-135V AC)

Procurement Notes

Verify the specific package variant and suffix against official Microchip documentation before ordering. Confirm that the application design accommodates the non-isolated nature of this driver. Ensure compatibility with the required thermal management for the SOIC-8 package given the specified power dissipation limits.

Selection Notes

Select this component for designs requiring a single-chip solution for non-isolated LED strings. It is suitable where galvanic isolation is not mandatory. Consider the Buck-Boost capability for wide input voltage ranges. Verify that the 350 mA output current meets the target LED array requirements.

Part Context

This part belongs to the HV9931 series of offline LED drivers from Microchip Technology. It is designed for cost-effective, high-performance lighting solutions. The series typically targets general illumination markets where efficiency and power factor are critical constraints.

Replacement Considerations

Consult Microchip datasheets for direct pin-compatible alternatives within the HV99xx family. Verify electrical specifications match if substituting with other manufacturers' parts.

FAQ

Is the HV9931LG-G an isolated driver?

No, the HV9931LG-G is designed for applications where galvanic isolation of the LED string is not an essential requirement.

What dimming capabilities does this IC support?

It supports PWM dimming and can be configured for triac dimming with additional external components for preloading and inrush current shaping.