Description
HV9910B is an open loop, current mode control, LED driver IC. This IC 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. 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.

FEATUREs
• Switch mode controller for single switch LED drivers
• Enhanced drop-in replacement to the HV9910
• 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

APPLICATIONs
• DC/DC or AC/DC LED driver applications
• RGB backlighting LED driver
• Back lighting of flat panel displays
• General purpose constant current source
• Signage and decorative LED lighting
• Chargers