LM3553
Overview
The LM3553 is a fixed frequency, current mode stepup DC/DC converter with two regulated current sinks. The device is capable of driving loads up to 1.2A from a single-cell Li-Ion battery.
- 2 Accurate and Programmable LED Current up to 1.2A in 128 Steps
- Total Solution Size < 30mm2
- 90% Peak Efficiency
- Drives 2 LEDs in Series with 1.2A from 5V Input
- Drives 2 LEDs in Series with 600mA from 3.0V Input
- Drives 1 LED with 1.2A from 3.0V Input
- Adjustable Over-Voltage Protection Allows for Single or Series LED Operation
- Four Operating Modes: Torch, Flash, Indicator, and Voltage Mode (4.98V)
- Programmable Flash Pulse Safety Timer in 16 Steps
- TX Input Ensures Synchronization with RF Power Amplifier Pulse or Prevents LED from Overheating
