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BQ25751

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具有电源路径的独立或 I²C 控制型 70V 降压/升压铅酸电池充电控制器

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BQ25751

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产品详情

Rating Catalog Number of series cells 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 Cell chemistry Lead Acid Charge current (max) (A) 20 Features Adjustable switching frequency, BAT temp thermistor monitoring (JEITA profile), Bidirectional, IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Integrated LDO, Power Path, SYNC Pin, USB C/PD compatible, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4.2 Vin (max) (V) 70 Absolute max Vin (max) (V) 85 Control topology Switch-Mode Buck-boost Battery charge voltage (min) (V) 0 Battery charge voltage (max) (V) 70 Control interface I2C TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
Rating Catalog Number of series cells 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 Cell chemistry Lead Acid Charge current (max) (A) 20 Features Adjustable switching frequency, BAT temp thermistor monitoring (JEITA profile), Bidirectional, IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Integrated LDO, Power Path, SYNC Pin, USB C/PD compatible, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4.2 Vin (max) (V) 70 Absolute max Vin (max) (V) 85 Control topology Switch-Mode Buck-boost Battery charge voltage (min) (V) 0 Battery charge voltage (max) (V) 70 Control interface I2C TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
VQFN (RRV) 36 30 mm² 6 x 5
  • Wide input voltage operating range: 4.4V to 70V
  • Wide battery voltage operating range: up-to 70V
    • 6V up-to 48V lead-acid charging profile with bulk, absorb and float voltage charging phases
    • Charge voltage temperature compensation
  • Synchronous buck charge controller with NFET drivers
    • Adjustable switching frequency from 200kHz to 600kHz
    • Optional synchronization to external clock
    • Integrated loop compensation with soft start
    • Optional gate driver supply input for optimized efficiency
  • Bidirectional converter operation (Reverse Mode) supporting USB-PD Extended Power Range (EPR)
    • Adjustable input voltage (VAC) regulation from 3.3V to 65V with 20mV/step
    • Adjustable input current regulation (RAC_SNS) from 400mA to 20A with 50mA/step using 2mΩ resistor
  • Direct power path management for highest efficiency to power system
    • System power selection from adapter or battery
    • Dynamic power management
    • All N-channel FET drivers
  • High accuracy
    • ±0.5% charge voltage regulation
    • ±3% charge current regulation
    • ±3% input current 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
  • Low battery quiescent current
  • High safety integration
    • Adjustable input overvoltage and undervoltage protection
    • Battery Overvoltage and overcurrent protection
    • Charging safety timer in CV Mode
    • Thermal shutdown
  • Status outputs
    • Adapter present status (PG)
    • Charger Operation status
  • Package
    • 36-pin 6mm × 5mm QFN
  • Wide input voltage operating range: 4.4V to 70V
  • Wide battery voltage operating range: up-to 70V
    • 6V up-to 48V lead-acid charging profile with bulk, absorb and float voltage charging phases
    • Charge voltage temperature compensation
  • Synchronous buck charge controller with NFET drivers
    • Adjustable switching frequency from 200kHz to 600kHz
    • Optional synchronization to external clock
    • Integrated loop compensation with soft start
    • Optional gate driver supply input for optimized efficiency
  • Bidirectional converter operation (Reverse Mode) supporting USB-PD Extended Power Range (EPR)
    • Adjustable input voltage (VAC) regulation from 3.3V to 65V with 20mV/step
    • Adjustable input current regulation (RAC_SNS) from 400mA to 20A with 50mA/step using 2mΩ resistor
  • Direct power path management for highest efficiency to power system
    • System power selection from adapter or battery
    • Dynamic power management
    • All N-channel FET drivers
  • High accuracy
    • ±0.5% charge voltage regulation
    • ±3% charge current regulation
    • ±3% input current 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
  • Low battery quiescent current
  • High safety integration
    • Adjustable input overvoltage and undervoltage protection
    • Battery Overvoltage and overcurrent protection
    • Charging safety timer in CV Mode
    • Thermal shutdown
  • Status outputs
    • Adapter present status (PG)
    • Charger Operation status
  • Package
    • 36-pin 6mm × 5mm QFN

The BQ25751 is a wide input voltage, switched-mode buck-boost battery charge controller with direct power path control. The device offers high-efficiency battery charging over a wide voltage range with bulk, float and absorption charging for lead-acid batteries. The device integrates all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use.

Besides the I2C host-controlled charging mode, the device also supports standalone charging mode via resistor programmable limits. Input current, charge current and charge voltage regulation targets can be set via the ILIM_HIZ, ICHG and FB pins, respectively.

The BQ25751 is a wide input voltage, switched-mode buck-boost battery charge controller with direct power path control. The device offers high-efficiency battery charging over a wide voltage range with bulk, float and absorption charging for lead-acid batteries. The device integrates all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use.

Besides the I2C host-controlled charging mode, the device also supports standalone charging mode via resistor programmable limits. Input current, charge current and charge voltage regulation targets can be set via the ILIM_HIZ, ICHG and FB pins, respectively.
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类型 标题 下载最新的英语版本 日期
* 数据表 BQ25751: Standalone/I2C Controlled, 70V Bidirectional Buck-Boost Lead Acid Battery Charge Controller with Direct Power Path Control 数据表 PDF | HTML 2024年 12月 8日
应用手册 如何在 BQ2575X 上实现外部 P&O 功能 PDF | HTML 英语版 PDF | HTML 2025年 7月 14日
EVM 用户指南 BQ25751 评估模块 PDF | HTML 英语版 PDF | HTML 2024年 12月 9日

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评估板

BQ25751EVM — BQ25751 评估模块

BQ25751EVM 评估模块 (EVM) 是 BQ25751 IC 的完整评估系统。BQ25756E IC 是一款降压/升压电池充电控制器，具有 4.4V 至 70V 的宽输入电压范围、高达 70V 的宽输出电压范围以及双向功能。BQ25751EVM 的最大输入和输出电压为 55V，最大充电电流为 10A。
用户指南: PDF | HTML
英语版: PDF | HTML
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BQ25751-FS — BQ25751 functional safety FIT rate and pin FMA

BQ25751 functional safety FIT rate and pin FMA
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电池充电器 IC
BQ25751 — 具有电源路径的独立或 I²C 控制型 70V 降压/升压铅酸电池充电控制器
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