CAT4109

3-Channel Constant-Current RGB LED Driver with Individual PWM Dimming CAT4109, CAV4109 Description The CAT4109/CAV4109 is a 3−channel constant−current LED driver, requiring no inductor. LED channel currents up to 175 mA are programmed independently via separate external resistors. Low output voltage operation of 0.4 V at 175 mA allows for more power efficient designs across wider supply voltage range. The three LED pins are compatible with high voltage up to 25 V supporting applications with long strings of LEDs. Three independent control inputs PWM1, PWM2, PWM3, control respectively LED1, LED2, LED3 channels. The device also includes an output enable (OE) control pin to disable all three channels independently of the PWMx input states. Thermal shutdown protection is incorporated in the device to disable the LED outputs whenever the die temperature exceeds 150°C. The device is available in a 16−lead SOIC package. Features 3 Independent Current Sinks up to 175 mA rated 25 V LED Current Set by External Low Power Control Resistors Individual PWM Control per Channel Low Dropout Current Source (0.4 V at 175 mA) Output Enable Input for Dimming “Zero” Current Shutdown Mode 3 V to 5.5 V Logic Supply Thermal Shutdown Protection 16−lead SOIC Package CAV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant Appli...