HV9989
Features
- Three out-of-phase constant-current boost converters
- Current loop closed, with sub-microsecond PWMdimming pulses, supports PWM dimming >20 k Hz
- Internal 40V linear regulator
- External clock input
- External individual reference inputs
- Individual PWM dimming inputs
- Programmable slope pensation
- +0.2A/-0.4A gate drivers
- Independent short circuit protection with hiccup for each channel
- Latching output open-circuit protection
Applications
- LCD panel back-lighting
Description
HV9989 is a three-channel peak current mode PWM controller designed to drive single switch converters in a constant-output current mode. It can be used for driving either RGB LEDs or multiple channels of white LEDs.
HV9989 features a proprietary PWM-dimming control algorithm that achieves a dimming pulse of a few hundred nanoseconds from a Continuous-Conduction Mode (CCM) or...
