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Texas Instruments TLC696x2/4/8TLC696x2/4/8-Q1 Backlight Drivers are a family of LCD local dimming backlight drivers compatible with TLC696x0/TLC696x0-Q1, a scan MOSFET controller to achieve 2/4/8 time-multiplexing control. Each device integrates 16 constant current sinks with the corresponding size of SRAM for brightness storage. The device connects by a two-wire serial interface in daisy chain topology and supports up to 1024 devices for more than 32,000 local dimming zones.
The device equips with an adaptive headroom voltage control scheme to control DC/DC directly to optimize system efficiency. Only the FB pin from the last device in the serial chain should be connected to DC/DC to achieve a simplified system layout. The device also integrates minimum brightness update latency, black insertion, and VRR features to improve display quality.
Texas Instruments TLC696x2/4/8TLC696x2/4/8-Q1 has three error flags: LED open detection (LOD), LED short detection (LSD), and thermal shutdown detection (TSD) for diagnostic. The device implements two options for readback, including UART/INT and SOUT/CLK_O, which is programmable by a register. The LMR140x0-Q1 devices are AEC-Q100 qualified for automotive applications.
