The LM3503 is a white LED driver for lighting applications. For dual display backlighting
applications, the LM3503 provides a complete solution. The LM3503 contains two internal white LED
current bypass FET (Field Effect Transistor) switches. The white LED current can be adjusted with a
DC voltage from a digital to analog converter or RC filtered PWM (pulse-width-modulated) signal at
the Cntrl pin.
With no external compensation, cycle-by-cycle current limit, output over-voltage
protection, input under-voltage protection, and dynamic white LED current control capability, the
LM3503 offers superior performance over other step-up white LED drivers.