HV9964

Supertex inc. CCM Boost LED Driver with Sub-Microsecond PWM Dimming and Open Loop Protection Features ► Switch-mode controller for single switch converters ● Boost ● SEPIC ► Current loop closed with sub-microsecond PWM dimming pulses supports PWM dimming >20kHz ► High PWM dimming ratio (>10,000:1) ► Internal 40V linear regulator ► Internal ±2% voltage reference ► Programmable constant frequency operation ► Programmable slope compensation ► Programmable soft start ► 10V, +0.25A/-0.5A MOSFET gate drivers ► Hiccup mode protection for both short circuit and open circuit conditions ► Latching protection from open loop ► Active-Low, open-drain output to indicate a fault condition HV9964 General Description The HV9964 is a current mode control LED driver IC designed to control single switch PWM converters (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. The IC also provides a load switch gate drive output, which can be used to disconnect the LEDs in case of a fault condition using an external load switch. The 10V external FET drivers allow the use of standard level FETs. The low voltage 5V AVDD is used to power the internal logic and also acts as a reference voltage to set the current level. The HV9964 features Supertex’ proprietary PWM dimmi...