HV9982
Features
- Switch mode controller for single-switch converters
- Closed loop control of output current
- Buck
- Boost
- SEPIC
- High PWM dimming ratio
- Internal 40V linear regulator ..
- Constant frequency operation
- Programmable slope pensation
- Linear and PWM dimming
- +0.2A/-0.4A gate drives for the switching FETs
- Output short circuit protection
- Output over voltage protection
- Hiccup mode protection
- Analog control of PWM dimming
General Description
The HV9982 is a three-channel, closed loop, peak current mode PWM controller for driving a constant output current. It can be used for driving either RGB LEDs or multiple channels of white LEDs. The HV9982 includes a 40V linear regulator which provides an 8.0V supply to power the IC. The switching frequencies of the three converters are controlled by an external clock signal. The channels operate at a switching frequency of 1/12th of the external clock frequency to minimize the input current ripple. Each converter is driven by...
