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The MAX25530GTL/V+ is a highly integrated TFT power and LED backlight driver IC for automotive TFT-LCD applications. The IC integrates a buck-boost converter, a boost converter, two gate driver supplies, and a boost/SEPIC converter to power one to four strings of LEDs in the display backlight.

The start-up and shutdown sequences for all power supply domains can be controlled via a resistor on the SEQ pin or by selecting one of seven preset modes via the I2C interface. MAX25530GTL/V+ is available in a 40-pin (6mm x 6mm) TQFN package with exposed pads and an operating temperature range of -40°C to +105°C.

Features

4 output TFT-LCD bias power supply

TFT-LCD section input from 2.8V to 5.5V

Integrated 430kHz or 2.2MHz boost and buck-boost converter

Positive and negative 10mA gate regulator with adjustable output voltage (triplexer/inverter multiplier)

Resistor programmable flexible timing control via SEQ pin

Under-voltage detection available on all outputs

Low quiescent current standby mode

4-channel LED backlight driver

Current up to 150mA per channel

Input voltage range: 4.5V to 42V

Integrated boost/SEPIC controller (440kHz or 2.2MHz)

Dimming ratio of 10,000:1 at 200Hz

Adaptive voltage optimisation function reduces power consumption in LED current sinking

String open, LED short and earth short diagnostics

Low electromagnetic emissions (EMI)

Support for LED string phase shift dimming

Spread spectrum technology for LED drivers and TFTs

Selectable switching frequency

I2C interface available for control and diagnostics

Fault indication via FLTB pin and I2C

Automatic retry upon detection of faults

Overload and thermal protection

Ambient operating temperature range: -40°C to +105°C

40-pin (6mm x 6mm) TQFN package with exposed pads

AECQ100 Class 1

Applications

Automotive centre displays

Automotive instrument panels

Automotive head-up display

Automotive Navigation Systems

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