| This is a introduction for flashlight chip LM3644 | |
| [Scope] | |
| - Two channel for two LEDs | |
| - Two silicon revision | |
| * LM3644 | |
| * LM3644TT (Douple torch current and flash timeout) | |
| [Hardware Interface] | |
| - I2C | |
| * For general control | |
| * Slave address 0x63 | |
| - GPIO | |
| * For enable/disable chip | |
| [Limit] | |
| - Channel couple: | |
| * Torch/Strobe | |
| - Channel decouple: | |
| * Enable/Disable | |
| * Brightness level | |
| - Torch Mode | |
| * Step current: 1.4 mA (2.8 mA for LM3644TT) | |
| * Min currnet: 0.977 mA (1.954 mA for LM3644TT) | |
| * Max current: 179 mA (360 mA for LM3644TT) | |
| - Strobe Mode | |
| * Step current: 11.725 mA | |
| * Min currnet: 10.9 mA | |
| * Max current: 1500 mA | |
| * Max current for two channel: 1500 mA | |
| * Min protected timeout: 10 ms (40 ms for LM3644TT) | |
| * Max protected timeout: 400 ms (1600 ms for LM3644TT) | |