Universal High Brightness LED DriverSwitch mode controller for single switch LED drivers
Open loop peak current controller
Internal 8.0 to 450V linear regulator
Constant frequency or constant off-time operation
Linear and PWM dimming capability
Requires few external components for operation
The HV9910B is an open loop, current mode, control LED driver IC. The HV9910B can be programmed to operate in either a constant frequency or constant off-time mode. It includes an 8.0 - 450V linear regulator which allows it to work from a wide range of input voltages without the need for an external low voltage supply. The HV9910B includes a 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 kilohertz. It also includes a 0 - 250mV linear dimming input which can be used for linear dimming of the LED current.