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電池充電器 IC

BQ25856-Q1

現行

車用 I2C 控制 70-V 雙向降壓升壓充電控制器

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產品規格表

BQ25856-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Number of series cells 16 Cell chemistry Li-Ion/Li-Polymer, LiFePO4, Lithium Phosphate/LiFePO4, NiMH, SuperCap Charge current (max) (A) 20 Features AEC-Q100 Automotive Qual, 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, SYNC Pin, USB C/PD compatible, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4.4 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 Operating temperature range (°C) -40 to 150
Rating Automotive Number of series cells 16 Cell chemistry Li-Ion/Li-Polymer, LiFePO4, Lithium Phosphate/LiFePO4, NiMH, SuperCap Charge current (max) (A) 20 Features AEC-Q100 Automotive Qual, 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, SYNC Pin, USB C/PD compatible, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4.4 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 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
  • Wide battery voltage operating range: up-to 70V with multi-chemistry support:
    • 1- to 14-cell Li-ion charge profile
    • 1- to 16-cell LiFePO4 charge profile
    • Up-to 70V supercapacitor charging
  • Synchronous buck-boost charge 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
    • 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 0.4A to 20A with 50mA/step using 5mΩ resistor
  • High accuracy
    • ±0.5% charge voltage regulation
    • ±3% charge/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
    • Battery overvoltage and overcurrent protection
    • Charging safety timer
    • Thermal shutdown
  • Status outputs
    • Input power present status (PG)
    • Charger operation status (STAT1, STAT2)
  • Package
    • 36-pin 5mm × 6mm QFN with wettable flanks
  • Functional Safety-Capable
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: −40ºC ≤ TA≤ 150ºC
  • Wide input voltage operating range: 4.4V to 70V
  • Wide battery voltage operating range: up-to 70V with multi-chemistry support:
    • 1- to 14-cell Li-ion charge profile
    • 1- to 16-cell LiFePO4 charge profile
    • Up-to 70V supercapacitor charging
  • Synchronous buck-boost charge 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
    • 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 0.4A to 20A with 50mA/step using 5mΩ resistor
  • High accuracy
    • ±0.5% charge voltage regulation
    • ±3% charge/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
    • Battery overvoltage and overcurrent protection
    • Charging safety timer
    • Thermal shutdown
  • Status outputs
    • Input power present status (PG)
    • Charger operation status (STAT1, STAT2)
  • Package
    • 36-pin 5mm × 6mm QFN with wettable flanks
  • Functional Safety-Capable

The BQ25856-Q1 is an automotive grade, wide input voltage, switched-mode buck-boost Li-Ion, Li-polymer, or LiFePO4 battery charge controller with bidirectional power flow support. The device offers high-efficiency battery charging over a wide voltage range with accurate charge current and charge voltage regulation, in addition to automatic charge preconditioning, termination, and charge status indication. The device integrates all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use. In reverse mode, the device draws power from the battery and regulates the input terminal voltage with an added constant current loop for protection.

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 BQ25856-Q1 is an automotive grade, wide input voltage, switched-mode buck-boost Li-Ion, Li-polymer, or LiFePO4 battery charge controller with bidirectional power flow support. The device offers high-efficiency battery charging over a wide voltage range with accurate charge current and charge voltage regulation, in addition to automatic charge preconditioning, termination, and charge status indication. The device integrates all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use. In reverse mode, the device draws power from the battery and regulates the input terminal voltage with an added constant current loop for protection.

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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BQ25756 現行 具有 MPPT 功能之獨立式或 I²C 控制的 70-V 雙向降壓-升壓充電控制器 BQ25756 is a non-automotive version that is pin-to-pin with BQ25856-Q1

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類型 標題 日期
* Data sheet BQ25856-Q1: Automotive, Standalone/I2C Controlled, 1- to 14-Cell Bidirectional Buck-Boost Battery Charge Controller datasheet (Rev. A) PDF | HTML 2024年 10月 31日
Application note Capacitor Backup Circuits with the BQ25856-Q1 PDF | HTML 2025年 4月 30日
Application brief Designing a fast charging and discharging supercapacitor backup system for automotive applications PDF | HTML 2024年 11月 21日

設計與開發

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開發板

BQ25856EVM — BQ25856 評估模組

BQ25856 評估模組 (EVM) 是適用於 BQ25856 IC 的完整評估系統，BQ25856 IC 為降壓升壓電池充電控制器，具有 4.2V 至 70V 寬輸入範圍、最高 70V 的寬輸出電壓範圍、雙向功能和 AEC-Q100 認證。此裝置可在寬電壓範圍內，提供高效率 DC/DC 轉換。此裝置整合了降壓升壓轉換器的所有迴路補償，從而提供易用的高密度方法。
使用指南: PDF | HTML
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計算工具

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.
支援產品和硬體

支援產品和硬體

產品
電池充電器 IC
  • BQ25756 — 具有 MPPT 功能之獨立式或 I²C 控制的 70-V 雙向降壓-升壓充電控制器
  • BQ25758 — 具有 USB PD EPR 和 PPS 支援的 I²C 控制 60-V 雙向降壓升壓控制器
  • BQ25756E — 獨立或 I²C 控制的雙向降壓升壓充電控制器，最多可支援 7S 電池
  • BQ25856-Q1 — 車用 I2C 控制 70-V 雙向降壓升壓充電控制器
  • BQ25758A — 具有 USB PD EPR 和 PPS 支援的 I²C 控制 60V 雙向降壓升壓控制器
  • BQ25750 — 具有電源路徑的獨立式或 I²C 控制 70-V 雙向降壓升壓充電控制器
  • BQ25858-Q1 — 車用獨立式或 I²C 控制的 70V 雙向降壓升壓控制器
  • BQ25858B-Q1 — 車用獨立式或 I²C 控制的 70V 雙向降壓升壓控制器
  • BQ25751 — 具有電源路徑的獨立式或 I²C 控制、70V、降壓升壓、鉛酸電池充電控制器
  • BQ25820 — 具有電源路徑的獨立式或 I²C 控制 70V 雙向降壓充電控制器
  • BQ25758S — 具有 USB PD EPR 和 PPS 支援的 I²C 控制 32V 雙向降壓升壓控制器
  • BQ25822 — 具電源路徑與自動備援模式的 70V 雙向降壓式充電控制器
硬體開發
開發板
  • BQ25756EVM — 適用於 1 至 14 芯雙向降壓升壓電池充電控制器的 BQ25756 評估模組
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