General Description

The HV9912 is a current mode control LED driver IC designed to control single switch PWM converters (buck, boost, buck-boost or SEPIC) in a constant frequency mode. The controller uses a peak current-mode control scheme with programmable slope compensation and includes an internal transconductance amplifier

to control the output current in closed loop enabling high output current accuracy (in the case of buck and buck-boost converters, the output current can be sensed using a high side current sensor like the HV7800).

Features

Switch mode controller for single switch

drivers

♦Buck

♦Boost

♦Buck-boost and SEPIC

Works with high side current sensors

Closed loop control of output current

High PWM dimming ratio

Internal 90V linear regulator (can be extended using external Zener diodes)

Internal 2 voltage reference

(0°C < TA< 85°C)

Constant frequency operation

Programmable slope compensation

Linear & PWM dimming

+0.2A/-0.4A gate drive

Hiccup mode protection for both short circuit and open circuit conditions

Synchronization capability

Pin compatible with HV9911

Applications

LED backlight applications

General LED lighting applications

Battery powered LED lamps