Datasheet Summary
Step-up DC/DC Converter
- Backlight Driver
- General Description
The LN2117 Series is a fixed frequency, constant current step-up DC/DC converter ideal for driving LEDs used in backlighting applications on cellular phones, PDAs and digital cameras etc. Output voltage of up to 20V can be derived, and from a 3.2V input four white Led’s cab be driven in series or alternatively, using a 3.0V input, a network of six LEDs may be driven. Luminance of the LED’s is controlled by changing the duty cycle of a PWM signal applied to the CE pin.
- Features
- Input voltage range
2.5V- 6V
- Output voltage range up to 20V
- Oscillation frequency
1MHz±20%
- Efficiency
88%(When driving 3...