7.3.2 Torch Mode

In torch mode, the LED current source provides 128 target current levels from 2.4 mA to 376 mA, set by the LED Torch Brightness Register (0x04 bits [6:0]). Torch mode is activated by the Enable Register (0x01), setting mode M1, M0 (bits [1:0]) to 10. Once the TORCH sequence is activated, the LED current source ramps up to the programmed torch current by stepping through all current steps until the programmed current is reached. The rate at which the current ramps is determined by the value chosen in the Torch Ramp bit [0] in Timing Register (0x02).