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

• Two-channel synchronous Buck with integrated

switches

• Configurable constant voltage (CV) and constant

current (CC) operation

– Up to 2A continuous output current

– 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 TPS92542 device contains a synchronous

BOOST controller and a two-channel 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 Boost can be programmed to

operate as dual-phase, or three-phase together with

other TPS9254x devices. The output voltage can

be programmed using a programmable 8-bit DAC.

The BOOST controller incorporates programmable

frequency modulation technique for EMI reduction.

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 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 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 five

configurable MPIOs and two DIOs can be configured

as digital inputs or outputs. The MPIOs can be

configured as ADC inputs.

The TPS92542-Q1 is available in a 7.0mm × 7.0mm

thermally-enhanced 48-pin HTQFP package with topexposed

pad.