4.5V to 32V Input, Constant Current Boost HB LED Driver The CXLE8246 is a current mode fixed-frequency PWM controller for high brightness(HB) LED driving applications. The device operates from an in

  The CXLE8246 is a current mode fixed-frequency PWM controller for high brightness(HB) LED driving applications. The device operates from an input supply between 4.5V and 32V and provides to drive an external N-channel MOSFET. The CXLE8246 contains all the necessary building blocks including a bandgap reference, a 330KHz oscillator, current-mode control circuitry, chip shutdown block, softstart block and gate driver, etc. LED current is set by an external resistor. Current mode control provides improved transient response and simplified loop compensation. On-chip soft start reduces the inrush current on power up. The other features include chip shutdown, over voltage protection, LED dimming, built-in 5V regulator and slope compensation, etc. The CXLE8246 is available in 10-pin SSOP package

 Constant Current HB LED Driver 

 LED Current Set by an External Resistor 

 ±10% LED Current Accuracy 

 Peak Current Mode PWM Controller 

 4.5V to 32V Input Range 

 330kHz Switching Frequency 

 PWM Dimming 

 Cycle-by-Cycle Peak Inductor Current Limit 

 On-Chip Slope Compensation 

 Internal Soft-start 

 Built-in 5V regulator 

 Low Shutdown Current 

 Operating Temperature Range: －40℃ to 85℃ 

 Available in 10-pin SSOP package. 

 Lead-free, Rohs-Compliant and Halogen-free

  High Brightness LED Lighting 

  Flashlight

  Building and Street Lighting

  Constant Current Power Supply

  Portable Devices