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.

FEATUREs
• Three out-of-phase constant-current boost
   converters
• Current loop closed, with sub-microsecond 
   PWM dimming pulses, supports PWM dimming >20 kHz
• Internal 40V linear regulator
• External clock input
• External individual reference inputs
• Individual PWM dimming inputs
• Programmable slope compensation
• +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