1 Features

• AEC-Q100 qualified for automotive applications

– Device temperature grade 1: –40°C to 125°C

ambient operating temperature range

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• I2C programmable buck/LDO charger

– Supports charger input voltage (VOUT Pin) up

to 20V, absolute maximum value of up to 40V to

withstand load dump

– Supports multi-chemistry battery charging

profile of from 1 to 5cell NiMH, from 1 to 2cell

Li-Ion, LiFePO4

– Programmable charging current up to 500mA

– Wide battery voltage operating range from 0V

to 12V

– Programmable charging timer up to 32h

– NTC thermistor input to monitor battery

temperature

• Programmable boost converter supporting 12V car

battery back-up power system

– Programmable output voltage range: 5V to 12V

– Programmable boost average input current limit

from 5A to 15A

– Back-up battery (BUB) voltage in boost mode:

0.5V to 12V

• Minimum 3V for start-up

• Can start up at 1V when Vout > 5V

– < 20us automatic transition into the boost mode

when 12V system voltage drops

• Backup battery State-of-Health (SOH) detection

– Adjustable discharge current from 0A to 1.5A

– Multi-signal analog output (AVI pin) of

battery voltage, discharge current and battery

temperature

• Lower quiescent current and leakage current

– 20μA quiescent current in standby mode

– < 1μA shutdown current

– < 1μA leakage current for pins connected to the

back up battery

• EMI mitigation

– 2.2MHz fix switching frequency

– Programmable spread spectrum

• 3mm × 4mm, 25-pin package with wettable flank

2 Applications

• Emergency call (eCall)

3 Description

The TPS61382A-Q1 is 2.2MHz, 40V, 15A automotive

bi-directional boost converter, buck charger with

battery health detection function for back-up power

like TBOX. The device supports 40V absolute

maximum voltage on VOUT pin to withstand loaddump

condition and supports direct connection with

12V car battery.

The TPS61382A-Q1 integrates I2C configurable

buck/LDO charger supporting NiMH, Li-Ion, LiFePO4.

TPS61382A-Q1 integrates boost function that

operates over 0.5V-12V BUB voltage and 5V-12V

output voltage. The device applies fix frequency peak

current control scheme with optional spread spectrum

to minimize EMI. The boost function supports 5A to

15A programmable average current limit.

The TPS61382A-Q1 integrates battery health

detection feature which discharge the battery with a

constant current and detects the voltage drop across

the battery internal resistance.

The TPS61382A-Q1 is available in a 3mm × 4mm

QFN package with wettable flank. Care must be taken

when designing the PCB with TPS61382A-Q1. See

also Layout Example.