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

– Up to 2A continuous output current with 4%

accuracy

• Synchronous BOOST controller

– Programmable output voltage up to 65V

• Six floating gate drivers for shunt-FET dimming

– Programmable width and phase setting

– Programmable PWM frequency

• 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 TPS92543 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 TPS92543 includes two substrings

of three series connected floating bypass FET

controllers.

The synchronous BOOST controller implements a

peak current-mode controller to operate in constant

voltage mode. The Boost can be programmed

to operate as dual-phase together with another

TPS92543. 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 be compatible with shunt FET dimming

techniques and LED matrix manager-based dynamic

beam headlamps. 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.

The TPS92543 incorporates two sub-strings of three

series connected floating bypass FET controllers to

perform LED shunt FET dimming. Each controller can

perform FET dimming with segment voltages of up

to 55V. The device includes programmable registers

for phase shift and pulse width of each individual

segment.

The TPS92543 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 four configurable MPIOs

can be configured as digital inputs or outputs, or ADC

input for use with system temperature compensation,

LED binning and coding.

The TPS92543-Q1 is available in a 7.0mm × 7.0mm

thermally-enhanced 48-pin HTQFP package with topexposed

pad.