1 Features

• AEC-Q100 qualified for automotive applications

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

ambient operating temperature range

• I2C programmable buck/LDO charger

– Supports charger input voltage (VOUT Pin) up

to 21V, absmax up to 40V to withstand load

dump

– Supports multi-chemistry battery charging

profile of 1-2cell NiMH, 1cell Li-Ion, LiFePO4,

1 cell super capacitor

– Programmable charging current up to 3A

– Battery voltage operating range 0V to 3.8V

– Programmable charging timer up to 32h

– NTC thermistor input to monitor battery

temperature

• Programmable boost converter supporting 12V car

battery backup 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 3.8V

• Minimum 3V for start up when Vout<2.8V

• Minimum 1V for start up when Vout>2.8V

– <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

backup battery

• EMI mitigation

– 400kHz fix switching frequency

– Optional programmable spread spectrum

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

2 Applications

• Emergency call(eCall)

3 Description

The TPS61382Q1 is 400kHz, 40V, 15A automotive bidirectional

boost converter/ buck charger with battery

state of health detection function for back-up power

like TBOX. The converter supports absmax voltage

up to 40V on VOUT pin to withstand load-dump and

supports connecting to 12V car battery.

The TPS61382Q1 integrates I2C configurable

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

super capacitor.

TPS61382Q1 integrates boost function that operates

over 0.5V to 3.8V BUB voltage and 5-12V output

voltage. The device applies fix frequency peak current

control scheme with optional spread spectrum to

minimize EMI. The boost function supports 5A-15A

programmable average current limit.

The TPS61382Q1 integrates battery health detection

feature which discharges the battery with a constant

current and detects the voltage drop across the

battery internal resistance.

The TPS61382Q1 is available in a 3mm × 4mm QFN

package with wettable flank. Care needs to be taken

when designing the PCB with TPS61382Q1, view

Section 8.4.2 for details.