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電池充電器 IC

BQ24257

不推薦在新設計中採用

2A 單輸入 I2C / 獨立切換式鋰離子電池充電器

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產品規格表
BQ24257 不建議用於新設計
儘管為了支援以前的設計而繼續生產此項產品，但我們並不建議用在新設計上。考量下列其中一項替代產品：
open-in-new 比較替代產品
功能相似於所比較的產品
BQ25600 現行 採用 WCSP 且具有電源路徑和 OTG 的 I2C 單芯 3A 降壓電池充電器 This product is 3A, 1S I2C switching charger with OTG support and WCSP Package
BQ25601 現行 具有電源路徑和 OTG 的 I2C 單芯 3A 降壓電池充電器 This product is 3A, 1S I2C switching charger with OTG support and WQFN Package

BQ24257

不推薦在新設計中採用
產品規格表 立即訂購

產品詳細資料

Number of series cells 1 Charge current (max) (A) 2 Vin (max) (V) 6.5 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.44 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Buck Control interface I2C, Standalone (RC-Settable) Vin (min) (V) 4.35 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 2 Vin (max) (V) 6.5 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.44 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Buck Control interface I2C, Standalone (RC-Settable) Vin (min) (V) 4.35 Rating Catalog Operating temperature range (°C) -40 to 85
DSBGA (YFF) 30 5.71999999999999912 mm² 2.2 x 2.5999999999999996 VQFN (RGE) 24 16 mm² 4 x 4
  • High-efficiency Switch-mode Charger with Integrated Current Sense Resistor
  • BC1.2 D+, D– Detection with Dead Battery Provision (DBP) Pin-to-Sync with External USB-PHI
  • USB Charging Compliant
  • Selectable Input Current Limit of 100 mA,
    150 mA, 500 mA, 900 mA. 1.5 A, and 2 A
  • Watchdog Timer with Disable Bit
  • Integrated 4.9-V, 50-mA LDO
  • Complete System Level Protection
    • Input UVLO, Input Overvoltage Protection (OVP), Battery OVP, Sleep Mode, VIN_DPM
    • Input Current Limit
    • Charge Current Limit
    • Thermal Regulation and Thermal Shutdown
    • Voltage Based, JEITA Compatible NTC Monitoring Input
    • Safety Timer
  • In Host Mode, Programmable VBATREG, ICHG, ILIM, VIN_DPM, VOVP and safety timer in host mode (after I2C Communication and Before Watchdog Timer Times Out)
  • In Standalone Mode, Resistor Programmable ICHG, ILIM, and VIN_DPM in Standalone Mode (before I2C Communication and After Watchdog Timer Times Out)
  • 20-V Maximum Input Voltage Rating
  • 10.5-V Maximum Operating Input Voltage
  • Low RDS(on) Integrated Sense Resistor for up to 2-A Charging Rate
  • Open Drain Status Outputs
  • Synchronous Fixed-frequency PWM Controller Operating at 3 MHz for Small Inductor Support
  • Robust Battery Detection Algorithm
  • Charge Time Optimizer for Improved Charge Times at any Given Charge Current
  • High-efficiency Switch-mode Charger with Integrated Current Sense Resistor
  • BC1.2 D+, D– Detection with Dead Battery Provision (DBP) Pin-to-Sync with External USB-PHI
  • USB Charging Compliant
  • Selectable Input Current Limit of 100 mA,
    150 mA, 500 mA, 900 mA. 1.5 A, and 2 A
  • Watchdog Timer with Disable Bit
  • Integrated 4.9-V, 50-mA LDO
  • Complete System Level Protection
    • Input UVLO, Input Overvoltage Protection (OVP), Battery OVP, Sleep Mode, VIN_DPM
    • Input Current Limit
    • Charge Current Limit
    • Thermal Regulation and Thermal Shutdown
    • Voltage Based, JEITA Compatible NTC Monitoring Input
    • Safety Timer
  • In Host Mode, Programmable VBATREG, ICHG, ILIM, VIN_DPM, VOVP and safety timer in host mode (after I2C Communication and Before Watchdog Timer Times Out)
  • In Standalone Mode, Resistor Programmable ICHG, ILIM, and VIN_DPM in Standalone Mode (before I2C Communication and After Watchdog Timer Times Out)
  • 20-V Maximum Input Voltage Rating
  • 10.5-V Maximum Operating Input Voltage
  • Low RDS(on) Integrated Sense Resistor for up to 2-A Charging Rate
  • Open Drain Status Outputs
  • Synchronous Fixed-frequency PWM Controller Operating at 3 MHz for Small Inductor Support
  • Robust Battery Detection Algorithm
  • Charge Time Optimizer for Improved Charge Times at any Given Charge Current

The bq2425x is a highly integrated single-cell Li-Ion battery charger with integrated current sense resistor targeted for space-limited, portable applications with high capacity batteries. The single cell charger has a single input that operates from either a USB port or AC wall adapter for a versatile solution. BC1.2 compatible D+, D- detection allows for recognition of CDP, DCP, SDP, and non-standard USB adapters. The use of an accessory dead battery provision (DBP) pin allows for the system to sync a dead battery state in order to enable or disable the BC1.2 detection in the event of an external USB-PHI.

The bq24257 has two modes of operation: 1) I2C mode, and 2) Standalone mode. In I2C mode, the host can adjust the charge parameters and monitor the status of the charger operation. In Standalone mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The bq24257 enters host mode while the I2C registers are accessed and the watchdog timer has not expired (if enabled).

For all available packages, see the orderable addendum at the end of the datasheet.

All trademarks are the property of their respective owners.

The bq24258 has only one mode of operation which is the Standalone. In this mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The EN1, EN2, and EN3 pin are available in the bq24258 spin to support USB 3.0 compliance.

The battery is charged in four phases: trickle charge, pre-charge, constant current and constant voltage. In all charge phases, an internal control loop monitors the device junction temperature and reduces the charge current if the internal temperature threshold is exceeded. Additionally, a voltage-based, JEITA compatible battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging.

The bq2425x is a highly integrated single-cell Li-Ion battery charger with integrated current sense resistor targeted for space-limited, portable applications with high capacity batteries. The single cell charger has a single input that operates from either a USB port or AC wall adapter for a versatile solution. BC1.2 compatible D+, D- detection allows for recognition of CDP, DCP, SDP, and non-standard USB adapters. The use of an accessory dead battery provision (DBP) pin allows for the system to sync a dead battery state in order to enable or disable the BC1.2 detection in the event of an external USB-PHI.

The bq24257 has two modes of operation: 1) I2C mode, and 2) Standalone mode. In I2C mode, the host can adjust the charge parameters and monitor the status of the charger operation. In Standalone mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The bq24257 enters host mode while the I2C registers are accessed and the watchdog timer has not expired (if enabled).

For all available packages, see the orderable addendum at the end of the datasheet.

All trademarks are the property of their respective owners.

The bq24258 has only one mode of operation which is the Standalone. In this mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The EN1, EN2, and EN3 pin are available in the bq24258 spin to support USB 3.0 compliance.

The battery is charged in four phases: trickle charge, pre-charge, constant current and constant voltage. In all charge phases, an internal control loop monitors the device junction temperature and reduces the charge current if the internal temperature threshold is exceeded. Additionally, a voltage-based, JEITA compatible battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging.
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類型 標題 日期
* Data sheet bq24257, bq24258 2-A Single Input I2C, Standalone Switch-Mode Li-Ion/LiFePO4 Battery Charger with Integrated Current-Sense Resistor datasheet (Rev. C) PDF | HTML 2013年 8月 30日
Analog Design Journal Battery-charging considerations for high-power portable devices 2014年 4月 11日
Application note Building your own Battery Simulator 2013年 10月 14日
Application note Using bq2425x’s DPM Feature for Solar Panel Applications 2013年 7月 31日
Application note Selecting the Best bq2425x Single Cell I2C, Standalone Switch-Mode Battery Charg 2013年 6月 17日
User guide bq24257EVM-150, Single-Cell Li-Ion Switch-Mode Charger (Rev. A) 2013年 4月 3日

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驅動程式或資料庫

BQ24257SW-LINUX — 適用於 BQ2425x 的 Linux 驅動程式

The Linux driver supports the BQ2425x switch-mode Li-ion battery charger. The Linux driver supports communication through the I2C bus and interfaces with the power supply sub-system.

 

Linux mainline status

Available in Linux mainline: Yes
Available through git.ti.com: N/A 

Linux source files

The files (...)

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支援軟體

SLUC435 — bq24250EVM Software

支援產品和硬體

支援產品和硬體

產品
電池充電器 IC
BQ24250 — 在 SYSOFF 模式下具 1uA 和 TS 停用功能的 1 芯、2-A、I2C 控制降壓電池充電器 BQ24251 — 2A 單輸入 I2C / 獨立切換式鋰離子電池充電器 BQ24257 — 2A 單輸入 I2C / 獨立切換式鋰離子電池充電器
硬體開發
開發板
BQ24250EVM-150 — BQ24250EVM-150 單路輸入 I2C/獨立開關模式鋰離子電池充電器評估模組 BQ24251EVM-150 — BQ24251EVM-150 單路輸入 I2C/獨立開關模式鋰離子電池充電器評估模組
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計算工具

SLUC436 — Thermal TS bq2425x Calculator Tool

支援產品和硬體

支援產品和硬體

產品
電池充電器 IC
BQ24250 — 在 SYSOFF 模式下具 1uA 和 TS 停用功能的 1 芯、2-A、I2C 控制降壓電池充電器 BQ24251 — 2A 單輸入 I2C / 獨立切換式鋰離子電池充電器 BQ24257 — 2A 單輸入 I2C / 獨立切換式鋰離子電池充電器
硬體開發
開發板
BQ24250EVM-150 — BQ24250EVM-150 單路輸入 I2C/獨立開關模式鋰離子電池充電器評估模組 BQ24251EVM-150 — BQ24251EVM-150 單路輸入 I2C/獨立開關模式鋰離子電池充電器評估模組
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