Datasheet Summary
XC9133 Series
Step-Up DC/DC Converter-LED Backlight Driver
ETR0413-005a
- GENERAL DESCRIPTION
The XC9133 series is a fixed frequency, constant current step-up DC/DC converter which is optimized for LED backlight applications in mobile phones, PDAs and digital cameras. Output voltage of up to 17.5V is possible so that four white LEDs can be driven in series. Since the LED current is set by only one external resistor, all white LEDs placed in series can be turned on at the same time. The new DC/DC Converter is also able to drive a network of two parallel banks of three LEDs. LED dimming is controlled by adjusting the duty cycle of a PWM signal (10kHz Max.) applied to the CE pin. Efficiency...