• 8V to 550V Input Voltage Range
• >90% Efficiency
• Stable Operation at >50% Duty Cycle
• Drives Multiple LEDs in Series/Parallel Configurations
• Regulated LED Current
• Linear or PWM Brightness Control Inputs
• Resistor-Programmable Minimum Off-Time
• Buck or Boost Configuration

CPC9909 is a low cost, high-efficiency, offline, high-brightness (HB) LED driver manufactured using Clare’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.

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.

CPC9909 Data Sheet - Rev01: High Efficiency, Off-Line, High Brightness LED Driver
CPC9909EB - Rev 01: CPC9909 Evaluation Board User's Guide
Application Note - Rev 01: AN-301: CPC9909 Design Considerations

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• 8V to 450V Input Voltage Range
• >90% Efficiency
• Drives Multiple LEDs in Series/Parallel Combinations
• Regulated LED Drive Current
• Linear or PWM Brightness Control
• Resistor-Programmable Oscillator Frequency
• SOIC-8 and SOIC-8 EP (Exposed Thermal Pad) Packages

MXHV9910 is a low-cost, high-brightness (HB) LED driver manufactured using Clare's high-voltage BCDMOS on SOI process. The driver has internal circuitry that allows it to operate from a universal AC line or from 8Vdc to 450Vdc. This highly versatile input operating voltage enables this device to be used in a broad range of HB LED applications.

MXHV9910 features a fixed-frequency, peak-current control method, which provides an ideal solution for driving multiple LEDs in series and in parallel. In addition, LED dimming can be implemented by applying a small DC voltage to the LD pin, or by a low-frequency digital PWM signal to the PWMD pin.

MXHV9910 Data Sheet - Rev01 : Off-Line, High Brightness LED Driver
Application Note - Rev00E : MXHV9910 Design Considerations

MXHV9910 265V AC Demo Board User Guide
MXHV9910 30V Demo Board User Guide

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Typical Application Circuit