CPC9909NTR

INTEGRATED CIRCUITS DIVISION CPC9909 High Efficiency, Off-Line, High Brightness LED Driver Features 8VDC to 550VDC Input Voltage Range >90% Efficiency Stable Operation at >50% Duty Cycle Drives Multiple LEDs in Series/Parallel Regulated LED Current Linear or PWM Brightness Control Inputs Resistor-Programmable Minimum Off-Time SOIC-8 RoHS Compliant Package Buck or Boost Configuration Applications Flat-Panel Display RGB Backlighting Signage and Decorative LED Lighting DC/DC or AC/DC LED Driver Applications CPC9909 Block Diagram VDD VIN RT LD PW MD Voltage Regulator Voltage Reference + + Description The CPC9909 is a low cost, high-efficiency, offline, high-brightness (HB) LED driver manufactured using IXYS Integrated Circuits Division’s high voltage BCDMOS on SOI process. This driver has an internal regulator that allows it to operate from 8VDC to 550VDC . This wide input operating voltage range enables the driver to be used in a broad range of HB LED applications. The CPC9909 features pulse frequency modulation (PFM) with a constant peak-current control scheme. This regulation scheme is inherently stable, allowing the driver to be operated above 50% duty cycle without open loop instability or sub-harmonic oscillations. LED dimming can be implemented by applying a small DC voltage to the LD pin, or by applying a low frequency PWM signal to the PWMD pin. The CPC9909 is available in a standard 8-lead SOIC package and a thermally enhanced 8-lead SOIC pa...