General Description
The HV9985 is a three-channel peak current mode PWM controller for driving 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
► Switch mode controller for single-switch
converters
► Gate drivers optimized for driving Logic Level FETs
✦ 0.25A sourcing
✦ 0.5A sinking
► Typical ±2% absolute and string-to-string current
accuracy (with ±1% sense resistors)
► High PWM dimming ratio up to 5000:1
► 10-40V input range
► Constant frequency operation up to 1.0MHz
► On-chip clock or external clock option
► Programmable slope compensation
► Linear and PWM dimming
► Output short circuit protection
► Output over voltage protection
► Hiccup mode protection
APPLICATIONs
► RGB backlight applications
► Boost, buck & SEPIC topologies
► Multiple string white LED driver applications