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The TPS68401/TPS68402 is an advanced lighting management unit for handheld devices. It has three independent channels optimized for driving RGB LEDs. The built-in fractional charge pump boosts the input voltage to power the LEDs at low input voltage. Channel one can optionally be supplied directly from the battery voltage to reduce power consumption and improve efficiency.
At the heart of the device is a programmable state machine which executes a lighting program consisting of up to 16 instructions per channel. Once the program is loaded through the I2C interface the device is fully independent from the main processor resulting in significant system-level power savings. The device can issue an interrupt to the main processor via the INT pin.
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