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New High-Voltage LED Driver 
Clare release a new LED-driver. CPC9909 can drive from a few to hundreds of high bright LEDs in-series and/or parallel combinations in a constant peak-current control topology. Manufactured using Clare's 550V BCDMOS Silicon-On-Insulator (SOI) process, the CPC9909 operates directly off a rectified AC voltage supply, and does not require any additional low voltage supplies. LED brightness can be controlled via the pulse frequency modulation (PWM) or linear dimming inputs.
CPC9909's PWM with a constant peak-current control scheme is inherently stable, allowing the driver to be operated above 50% duty cycle without 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.