High-voltage LED drive solution designed with HV9963-EEWORLD

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HV9963 is a current mode controlled LED driver that can be used to control PWM converters (buck, boost, boost-buck or SEPIC). The PWM dimming ratio is greater than 5000:1. It has an internal 40V linear regulator, ±2% voltage reference, programmable soft start and 10V GATE driver. It is mainly used in RGB or white light LED backlight, battery energy LED lamps, and other DC/DC LED drivers.
The HV9963 is a current mode control LED driver IC designed to control single switch PWM converters (buck, boost, buck-boost or SEPIC) in a constant frequency mode. The controller uses a peak current-mode control scheme (with programmable slope compensation) and includes an internal transconductance amplifier to accurately control the output current over all line and load conditions. Multiple HV9963s can be synchronized to each other or to an external clock using the SYNC pin. The IC also provides a disconnect switch gate drive output, which can be used to disconnect the LEDs in case of a fault condition using an external disconnect FET. The 10V external FET drivers allow the use of standard level FETs. The low voltage 5.0V AVDD is used to power the internal logic and also acts as a reference voltage to set the current level.

The HV9963 includes an enhanced PWM dimming logic (patent pending) that enables very high PWM dimming ratios. HV9963 also provides a TTL compatible, low-frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to a few tens of kilohertz.

Main features of HV9963:

► Switch mode controller for single switch converters

● Buck

● Boost

● Buck-boost and SEPIC

► High output current accuracy

► High PWM dimming ratio (>5000:1)

► Internal 40V linear regulator

► Internal ±2% voltage reference

► Constant frequency operation with sync capability

► Programmable soft start

► 10V GATE drivers

► Hiccup mode protection for both short circuit and open circuit conditions

HV9963 applications:

► RGB or white LED backlighting

► Battery powered LED lamps

► Other DC/DC LED drivers

Figure 1. HV9963 functional block diagram

Figure 2. HV9963 typical application circuit diagram

Keywords：HV9963 Reference address：High-voltage LED drive solution designed with HV9963

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