TPS61381-Q1

AKTIV

Aufwärtswandler mit LDO-Ladegerät und Batteriezustandserkennung, 400 kHz

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Datenblatt

document-pdfAcrobat TPS61381-Q1 Automotive 400kHz, 40V, 15A Boost Converter with LDO Charger and Battery State of Health Detection datasheet (Rev. A) (Englisch) PDF | HTML

TPS61381-Q1

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Rating

Automotive

Topology

Boost

Vin (max) (V)

13

Vin (min) (V)

0.5

Vout (max) (V)

12

Vout (min) (V)

5

Switch current limit (typ) (A)

20

Features

Adjustable current limit, Bidirectional, Enable, I2C interface, Spread Spectrum, Synchronous rectification, UVLO fixed

EMI features

Frequency Dithering, Spread Spectrum

Control mode

Peak current mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.00002

Duty cycle (max) (%)

90

Rating

Automotive

Topology

Boost

Vin (max) (V)

13

Vin (min) (V)

0.5

Vout (max) (V)

12

Vout (min) (V)

5

Switch current limit (typ) (A)

20

Features

Adjustable current limit, Bidirectional, Enable, I2C interface, Spread Spectrum, Synchronous rectification, UVLO fixed

EMI features

Frequency Dithering, Spread Spectrum

Control mode

Peak current mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.00002

Duty cycle (max) (%)

90

WQFN-FCRLF (RAV)

24

12 mm² (4 mm × 3 mm)

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 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 1-5 cell NiMH, 1-2 cell Li-Ion, LiFePO4, 1-4 cell super capacitor
- Programmable charging current 50mA and 100mA
- Wide battery voltage operating range 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 backup battery
EMI mitigation
- 400kHz fix switching frequency
- Optional programmable spread spectrum
3mm × 4mm 25-pin package with wettable flank

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 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 1-5 cell NiMH, 1-2 cell Li-Ion, LiFePO4, 1-4 cell super capacitor
- Programmable charging current 50mA and 100mA
- Wide battery voltage operating range 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 backup battery
EMI mitigation
- 400kHz fix switching frequency
- Optional programmable spread spectrum
3mm × 4mm 25-pin package with wettable flank

The TPS61381-Q1 is 400kHz, 40V, 15A automotive bi-directional boost converter/ LDO charger with battery state of health detection function designed for back-up power systems like TBOX or e-call. The converter supports absmax voltage up to 40V on VOUT pin to withstand load-dump condition and supports direct connection with 12V car battery.

The TPS61381-Q1 integrates I2C configurable LDO charger supporting NiMH, Li-Ion, LiFePO4, super capacitor.

TPS61381-Q1 integrates boost function that operates over 0.5V to 12V 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 TPS61381-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 TPS61381-Q1 is available in a 3mm × 4mm QFN package with wettable flank. Care must be taken when designing the PCB with TPS61381-Q1, view for details.

The TPS61381-Q1 is 400kHz, 40V, 15A automotive bi-directional boost converter/ LDO charger with battery state of health detection function designed for back-up power systems like TBOX or e-call. The converter supports absmax voltage up to 40V on VOUT pin to withstand load-dump condition and supports direct connection with 12V car battery.

The TPS61381-Q1 integrates I2C configurable LDO charger supporting NiMH, Li-Ion, LiFePO4, super capacitor.

TPS61381-Q1 integrates boost function that operates over 0.5V to 12V 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 TPS61381-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 TPS61381-Q1 is available in a 3mm × 4mm QFN package with wettable flank. Care must be taken when designing the PCB with TPS61381-Q1, view for details.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen	Datum
*	Datenblatt	TPS61381-Q1 Automotive 400kHz, 40V, 15A Boost Converter with LDO Charger and Battery State of Health Detection datasheet (Rev. A)	PDF \| HTML	09.03.2026
	Anwendungshinweis	Supercapacitor Backup Power Supply for Dying Gasp Application	PDF \| HTML	10.04.2026
	Informationen zur funktionalen Sicherheit	TPS61381-Q1, TPS61382-Q1, TPS61383-Q1, and TPS61382A-Q1 Functional Safety FIT Rate, FMD and Pin FMA	PDF \| HTML	08.12.2025
	Anwendungshinweis	TPS61381-Q1 Schematic and Layout Guideline	PDF \| HTML	01.12.2025

Design und Entwicklung

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Evaluierungsplatine

TPS61381QEVM-126 — TPS61381-Q1 – Evaluierungsmodul

Das TPS61381QEVM-126 arbeitet über einen großen Stützbatteriespannungsbereich von 0 V bis 12 V und einen Spannungsbereich der Hauptbatterie (VBAT-Port) von 0 V bis 40 V. So wird ein bidirektionaler Betrieb erreicht. Das EVM unterstützt einen Ausgang mit bis zu 7,5 A Last bei 3,6 V BUB und 6,2 V (...)

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