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1 Features

? AEC-Q100 qualified for automotive applications

– Grade 1: –40°C to 125°C ambient operating

temperature

– Device HBM classification level H1C

– Device CDM classification level C5

? Functional Safety-Capable

– Documentation available to aid functional safety

system design

? 4.5V to 65V wide input voltage range

? Synchronous Buck with integrated switches

? Configurable Constant Voltage (CV) and Constant

Current (CC) operation

– Up to 2A continuous output current with 4%

accuracy

– 4% regulation accuracy (voltage and current

mode)

? Synchronous BOOST controller

– Programmable output voltage up to 65V

? BOOST and BUCK spread-spectrum for EMI

mitigation

? BUCK switch thermal protection

? UART serial communication

– Internal oscillator for system clock

– LMM compatible

? Internal EEPROM

– Default settings

– Customer calibration data

2 Applications

? Automotive headlight and adaptive LED driving

module

3 Description

The TPS92544-Q1 device contains a synchronous

BOOST controller and a monolithic synchronous buck

LED driver with a wide 4.5V to 65V operating BUCK

input voltage range.

The synchronous BOOST controller implements

a peak current-mode controller to operate in

constant voltage mode. The output voltage can be

programmed using a programmable 8-bit DAC.

The monolithic synchronous BUCK implements an

adaptive on-time average current mode control and

is designed to generate constant voltage (CV) or

constant current (CC) output. In the CC mode,

the BUCK is compatible with shunt FET dimming

techniques and LED matrix manager-based dynamic

beam headlamps. In CV mode, the adaptive ontime

control enables high bandwidth operation with

fast transient response. The adaptive on-time control

provides near constant switching frequency that can

be set between 100kHz and 1.0MHz. Inductor current

sensing and closed-loop feedback enable better than

±4% accuracy over wide input voltage, output voltage

and ambient temperature range. In CC mode, the

BUCK can independently modulate LED current using

both analog or PWM dimming techniques.

The TPS92544-Q1 incorporates features to

implement a trapezoidal motion profile allowing for a

simple operation of the stepper motor functionality.

The TPS92544-Q1 includes an internal oscillator. The

UART serial interface is compatible with TPS9266x,

and TPS9254x devices. The internal EEPROM can

store system defaults as well as calibration and

lighting module data. The seven configurable MPIOs

and DIOs can be set as digital inputs or outputs, or

ADC inputs for applications with system temperature

compensation, LED binning and coding, etc.

The TPS92544-Q1 is available in a 7.0mm × 7.0mm

thermally-enhanced 48-pin HTQFP package with topexposed

pad.