The MAX25069 is a highly integrated TFT power supply and LED backlight driver IC for automotive TFT-LCD applications. This IC integrates one boost converter, one inverting buck-boost converter, two gate-driver supplies, and a boost/SEPIC controller that can power 1 to 6 strings of LEDs in the display backlight.The source-driver power supplies consist of a boost converter which can provide up to +18V in unipolar mode and an inverting buck-boost converter that can generate a voltage down to -10.5V. The AVDD output can deliver up to 300mA at 13.5V, while NAVDD can provide up to 200mA. The positive source-driver supply-regulation voltage (VAVDD) is set using internal NV memory or through I2C. The negative source-driver supply voltage (VNAVDD) is always tightly regulated to -VAVDD. The source-driver supplies operate from an input voltage between 2.65V and 5.5V.The gate-driver power supplies consist of regulated charge pumps that generate up to +31.5V and down to -18V and can deliver up to 15mA each. The IC features a 6-string LED driver with input switch control (NGATE) that can power up to 6 strings of LEDs with 150mA (max) of current per string. Logic-controlled and I2C-controlled pulse-width modulation (PWM) dimming are included, with minimum pulse widths as low as 300ns and the option of phase shifting the LED strings with respect to one another. When phase shifting is enabled, each string is turned on at a different time, reducing the input and output ripple, as well as audible noise. With phase shifting disabled, the current sinks turn on simultaneously and parallel connection of current sinks is possible.The startup and shutdown sequences for all power domains are controlled using one of the eight preset modes, which are selectable using internal nonvolatile memory or through the I2C interface.The MAX25069 is available in a 7mm x 7mm, 48-pin TQFN package with an exposed pad, and operates over the -40°C to +125°C ambient temperature range.ApplicationsAutomotive DashboardsAutomotive Central Information DisplaysAutomotive Head-Up DisplaysAutomotive Navigation Systems