Supertex HV9985
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. The HV9985 features a 40V linear regulator, which provides a 5.0V supply to power the IC.| Part No. | HV9985 |
|---|---|
| Datasheet | HV9985 Download |
| Manufacturer |  Supertex |
| Description | LED Driver |
| Buy | Stock & Price |
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 protectionGENERAL DESCRIPTION
The switching frequencies of the three converters in the IC are controlled either with an external clock signal (the channels operate at a switching frequency of 1/12th of the external clock frequency) or using the internal oscillator. The three channels are positioned 120° out-of-phase to reduce the input current ripple. Each converter is driven by a peak current mode controller with output current feedback. The three output currents can be individually dimmed using either linear or PWM dimming.
