AEC-Q100 Automotive Qual, Adjustable switching frequency, Bidirectional, IC thermal regulation, IINDPM (Input current limit), Input OVP, Integrated ADC, Integrated LDO, SYNC Pin, USB C/PD compatible

Vin (min) (V)

4.4

Vin (max) (V)

70

Absolute max Vin (max) (V)

85

Control topology

Switch-Mode Buck, Switch-Mode Buck-boost

Control interface

I2C

Operating temperature range (°C)

-40 to 150

Rating

Automotive

Charge current (max) (A)

20

Features

AEC-Q100 Automotive Qual, Adjustable switching frequency, Bidirectional, IC thermal regulation, IINDPM (Input current limit), Input OVP, Integrated ADC, Integrated LDO, SYNC Pin, USB C/PD compatible

Vin (min) (V)

4.4

Vin (max) (V)

70

Absolute max Vin (max) (V)

85

Control topology

Switch-Mode Buck, Switch-Mode Buck-boost

Control interface

I2C

Operating temperature range (°C)

-40 to 150

VQFN (RRV)

36

30 mm² 6 x 5

AEC-Q100 qualified for automotive applications
- Temperature grade 1: −40ºC ≤ TA≤ 150ºC
Wide input voltage operating range: 4.4V to 70V with 20mV/step
Synchronous buck-boost DC/DC controller with NFET drivers
- Adjustable fSW from 200kHz to 600kHz
- Switching frequency dithering for EMI noise reduction (DRSS)
- Optional synchronization to external clock
- Integrated loop compensation with soft start
- Selectable PFM operation for light load efficiency improvement (PFM or forced PWM option)
- Optional gate driver supply input for optimized efficiency
Support USB-PD Extended Power Range (EPR) in forward and reverse power direction
- Adjustable output voltage regulation from 3.3V to 60V with 20mV/step
- Adjustable input and output current regulation (RAC_SNS, ROUT_SNS) from 400mA to 20A with 50mA/step using 5mΩ resistor
Bypass mode for highest efficiency with VOUT = VAC
Buck-only mode
High accuracy
- ±2% output voltage regulation
- ±3% output/input current regulation
- ±2% input voltage regulation
I2C controlled for optimal system performance with resistor-programmable option
- Hardware adjustable input and output current limits
Integrated 16-bit ADC for voltage, current, and temperature monitoring
High safety integration
- Adjustable input overvoltage and undervoltage protection
- Output overvoltage and overcurrent protection
- Thermal shutdown
Status outputs
- Input power present status (PG)
- Switcher operation status (STAT)
Package
- 36-pin 5mm × 6mm QFN with wettable flanks

AEC-Q100 qualified for automotive applications
- Temperature grade 1: −40ºC ≤ TA≤ 150ºC
Wide input voltage operating range: 4.4V to 70V with 20mV/step
Synchronous buck-boost DC/DC controller with NFET drivers
- Adjustable fSW from 200kHz to 600kHz
- Switching frequency dithering for EMI noise reduction (DRSS)
- Optional synchronization to external clock
- Integrated loop compensation with soft start
- Selectable PFM operation for light load efficiency improvement (PFM or forced PWM option)
- Optional gate driver supply input for optimized efficiency
Support USB-PD Extended Power Range (EPR) in forward and reverse power direction
- Adjustable output voltage regulation from 3.3V to 60V with 20mV/step
- Adjustable input and output current regulation (RAC_SNS, ROUT_SNS) from 400mA to 20A with 50mA/step using 5mΩ resistor
Bypass mode for highest efficiency with VOUT = VAC
Buck-only mode
High accuracy
- ±2% output voltage regulation
- ±3% output/input current regulation
- ±2% input voltage regulation
I2C controlled for optimal system performance with resistor-programmable option
- Hardware adjustable input and output current limits
Integrated 16-bit ADC for voltage, current, and temperature monitoring
High safety integration
- Adjustable input overvoltage and undervoltage protection
- Output overvoltage and overcurrent protection
- Thermal shutdown
Status outputs
- Input power present status (PG)
- Switcher operation status (STAT)
Package
- 36-pin 5mm × 6mm QFN with wettable flanks

BQ25858-Q1, BQ25858B-Q1 are automotive grade, wide input voltage, bidirectional switched-mode buck-boost controllers. The devices offer high-efficiency regulation over a wide voltage range with output CC-CV control. The devices integrate all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use. In reverse mode, the devices draw power from the output supply and regulate the input terminal voltage with an added constant current loop for protection.

Besides the I2C host-controlled mode, the device also supports programmable hardware limits. Input current, and output current regulation targets can be set with single resistor on the IIN, and IOUT pins, respectively. By default, the device is programmed to provide 5V output, and the target output voltage can be adjusted via the VOUT_REG register bits.

BQ25858-Q1, BQ25858B-Q1 are automotive grade, wide input voltage, bidirectional switched-mode buck-boost controllers. The devices offer high-efficiency regulation over a wide voltage range with output CC-CV control. The devices integrate all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use. In reverse mode, the devices draw power from the output supply and regulate the input terminal voltage with an added constant current loop for protection.

Besides the I2C host-controlled mode, the device also supports programmable hardware limits. Input current, and output current regulation targets can be set with single resistor on the IIN, and IOUT pins, respectively. By default, the device is programmed to provide 5V output, and the target output voltage can be adjusted via the VOUT_REG register bits.

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Documentación técnica

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	Tipo	Título		Fecha
*	Data sheet	BQ25858-Q1/858B-Q1: Automotive, I2C Controlled, Bidirectional Buck-Boost Controllers with Wide Voltage Range datasheet (Rev. A)	PDF \| HTML	10 jul 2025
	Certificate	BQ25858EVM EU Declaration of Conformity (DoC)		07 feb 2025

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

BQ25858EVM — Módulo de evaluación para convertidor buck-boost bidireccional de 70 V controlado por I2C y automotr

El módulo de evaluación (EVM) BQ25858 es un sistema de evaluación completo para el CI BQ25858-Q1. El BQ25858EVM tiene una entrada y una salida máximas de 55 V y una corriente de salida máxima de 10 A.

El IC BQ25858-Q1 es un controlador buck-boost bidireccional de modo conmutado de amplia tensión. (...)

Guía del usuario: PDF | HTML

No disponible en TI.com

Herramienta de cálculo

BQ25756-DESIGN-CALC — BQ25756 design calculator

BQ25756 design calculator is a calculation tool for BQ25756 which is a wide input voltage, switched mode buck-boost Li-Ion, Li-polymer, or LiFePO4 battery charge controller with bidirectional power flow support.

Productos y hardware compatibles

Productos

Circuitos integrados para cargadores de baterías

BQ25756 — Regulador de carga bidireccional buck-boost de 70 V independiente o controlado por I²C con seguim
BQ25758 — Controlador buck-boost bidireccional de 60 V controlado por circuito interintegrado (I²C) compatible
BQ25756E — Controlador de carga bidireccional buck-boost autónomo o controlado por I²C para baterías de hasta 7
BQ25856-Q1 — Controlador de carga buck-boost bidireccional de 70 V controlado por I2C para automoción
BQ25758A — Controlador buck-boost bidireccional de 60 V controlado por circuito interintegrado (I²C) compati
BQ25750 — Regulador de carga bidireccional reductor-elevador de 70 V independiente o controlado por I²C con ru
BQ25858-Q1 — Controlador buck-boost bidireccional de 70 V independiente o controlado por I²C para automoción
BQ25858B-Q1 — Controlador buck-boost bidireccional de 70 V independiente o controlado por I²C para automoción
BQ25751 — Controlador buck-boost de carga de batería de plomo-ácido de 70 V, controlado por I²C o independient
BQ25820 — Regulador de carga bidireccional reductor-elevador de 70 V independiente o controlado por I²C con ru
BQ25758S — Controlador buck-boost bidireccional de 32 V controlado por I²C compatible con USB, PD, EPR y PPS
BQ25822 — Controlador de carga de buck bidireccional de 70 V con ruta de potencia y modo de respaldo automá

Desarrollo de hardware

Placa de evaluación

BQ25756EVM — EVM BQ25756 para controlador de carga de batería bidireccional buck-boost, 1-14 celdas

Descargar

Encapsulado	Pines	Símbolos CAD, huellas y modelos 3D
VQFN (RRV)	36	Ultra Librarian

Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

BQ25858-Q1

Controlador buck-boost bidireccional de 70 V independiente o controlado por I²C para automoción

BQ25858-Q1

Detalles del producto

Documentación técnica

Diseño y desarrollo

BQ25858EVM — Módulo de evaluación para convertidor buck-boost bidireccional de 70 V controlado por I2C y automotr

BQ25756-DESIGN-CALC — BQ25756 design calculator

Productos y hardware compatibles

Productos

Circuitos integrados para cargadores de baterías

Desarrollo de hardware

Placa de evaluación

Pedidos y calidad

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

Serie de videos

Videos

Opciones de descarga

BQ25756-DESIGN-CALC — BQ25756 design calculator

Circuitos integrados para cargadores de baterías

Desarrollo de hardware

Información de la versión