HV9801ALG-G Microchip

HV9801A Switch-Dimmable LED Driver Features General Description Four-level Switch Dimming The HV9801A LED driver is ideally suited for switch-dimmable applications using LED bulbs and Highly Accurate Current Regulator fixtures. Output Overcurrent or Short-circuit Protection Through switch dimming, the lamp can be adjusted to IC Overtemperature Protection four discrete brightness levels by rapid cycling of the light switch. The brightness levels are traversed in an Applications up-and-down manner. Brightness resumes at the Switch-dimmable LED Bulbs and Fixtures highest level when power is removed for more than a second. The device can be powered directly from rectified AC through an internal V regulator rated at 450V. DD Package Types 8-lead SOIC 16-lead SOIC (Top view) (Top view) 1 16 VIN DNC 2 15 DNC DNC 3 14 DNC RT 4 13 CS DNC 5 VIN 1 8 RT GND 12 VDD 6 11 CS 2 7 DNC DNC DNC 3 6 VDD DNC 7 10 DNC GND 8 9 GATE 4 5 DNC GATE DNC See Table 2-1 for pin information. 2017 Microchip Technology Inc. DS20005692A-page 1HV9801A Functional Block Diagram GND VDD Regulator OTP VIN UVLO VDD AND GATE Leading Average CS Edge Current Blanking Regulator 250mV OR S Q Hiccup R Q 440mV OFF Time Generator Current Mirror from VDD Rail RT HV9801A DS20005692A-page 2 2017 Microchip Technology Inc.