LM2754 Description
The LM2754 is an integrated low noise, high current switched capacitor DC/DC converter with four regulated current sinks. The device is optimized for driving 1 to 4 high power white LEDs in parallel with a maximum current of 800mA. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements.
LM2754 Key Features
- 2 Up to 800mA Output Current
- Drives 1, 2, 3 or 4 LEDs in Parallel
- Ability to Disable One Current Sink Via the
- Time-Out Circuitry Limits Flash Duration to 1 Second
- TX Input Ensures Synchronization with RF Power Amplifier Pulse
- Adaptive 1x, 1.5x and 2x Gains for Maximum Efficiency
- 1MHz Constant Frequency Operation
- Output Current Limit
- True Shutdown Output Disconnect
- <1µA Shutdown Current
LM2754 Applications
- Camera Flash in Mobile Phones
- Flash for Digital Cameras
- Supplies for DSP’s, Microprocessors, Memory, MP3 Players, Pagers, Other Portable Devices