The LM3643 is a dual LED flash driver that provides a high level of adjustability within a small solution size. It utilizes a 2-MHz or 4-MHz fixed-frequency synchronous boost converter to provide power to dual 1.5-A constant current LED sources. The device features an I2C-compatible interface for controlling hardware flash and torch pins, a TX interrupt, and an NTC thermistor monitor. It supports independent programmable currents in each output leg for Flash or Movie Mode (Torch) conditions.
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| Input Voltage (Min) | 2.5V |
| Input Voltage (Max) | 5.5V |
| Output Current (Max) | 1.5A |
| Number of Channels | 2channels |
| Switching Frequency | 2 or 4MHz |
| Operating Temperature Range | -40 to 85°C |
| Control Interface | I2C |
| Topology | Boost |
| RoHS | Yes |
| REACH | Yes |
| Msl Rating / Peak Reflow | Level-1-260C-UNLIM |
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