支援軟體
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引腳對引腳的功能與所比較的產品相同
BQ24251
- High-Efficiency Switched-Mode Charger With
Separate Power Path - Startup System From Deeply Discharged or
Missing Battery - USB Charging Compliant
- Selectable Input Current Limit of 100 mA,
500 mA, 900 mA, 1.5 A, and 2 A
- Selectable Input Current Limit of 100 mA,
- BC1.2 Compatible D+, D– Detection
- In Host Mode (After I2C Communication Starts
and Before Watchdog Timer Times Out)- Programmable Battery Charge Voltage,
VBATREG - Programmable Charge Current (ICHG)
- Programmable Input Current Limit (ILIM)
- Programmable Input Voltage-Based Dynamic
Power Management Threshold, (VIN_DPM) - Programmable Input Overvoltage Protection
Threshold (VOVP) - Programmable Safety Timer
- Programmable Battery Charge Voltage,
- Resistor Programmable Defaults for:
- ICHG up to 2 A With Current Monitoring Output
(ISET) - ILIM up to 2 A With Current Monitoring Output
(ILIM) - VIN_DPM (VDPM)
- ICHG up to 2 A With Current Monitoring Output
- Watchdog Timer 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
- Thermal Shutdown
- Voltage-Based, JEITA Compatible NTC
Monitoring Input - Safety Timer
- Input UVLO, Input Overvoltage Protection
- 22 V Absolute Maximum Input Voltage Rating
- 10.5 V Maximum Operating Input Voltage
- Low RDS(on) Integrated Power FETs for a Charging
Rate of up to 2 A - Open-Drain Status Outputs
- Synchronous Fixed-Frequency PWM Controller
Operating at 3 MHz for Small Inductor Support - AnyBoot Robust Battery Detection Algorithm
- Charge Time Optimizer for Improved Charge
Times at Any Given Charge Current - 2.40-mm × 2.00-mm 30-Ball DSBGA and 4-mm ×
4-mm 24-Pin QFN Packages
The bq24250, bq24251, and bq24253 are highly integrated single-cell Li-Ion battery chargers and system power-path management devices 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 an AC wall adapter for a versatile solution.
The power-path management feature allows the bq24250, bq24251, and bq24253 to power the system from a high-efficiency DC-DC converter while simultaneously and independently charging the battery. The charger monitors the battery current at all times and reduces the charge current when the system load requires current above the input current limit. This reduced charge current allows for proper charge termination and enables the system to run with a defective or absent battery pack. Additionally, this reduced charge current enables instant system turnon even with a totally discharged battery or no battery. The architecture of the power-path management also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. This supplementation of current requirements enables the use of a smaller adapter.
The battery is charged in four phases: trickle charge, precharge, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC 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) that monitors battery temperature for safe charging is included.
技術文件
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檢視所有 7 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | bq2425x 2A Single-Input I2C, Stand-Alone Switched-Mode Li-Ion Battery Charger With Power-Path Management datasheet (Rev. H) | PDF | HTML | 2015年 8月 20日 |
| Technical article | Portable speaker power: Making the bass possible | PDF | HTML | 2015年 5月 12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 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
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
This EVM enables test and evaluation of the Texas Instruments' bq24250/51/57 devices. The bq2425x series are highly integrated single cell Li-Ion battery chargers targeted for space-limited, portable applications with high capacity batteries. The single cell charger has a single input that (...)
使用指南: PDF
開發板
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
This EVM enables test and evaluation of the Texas Instruments' bq24251 device. The bq2425x series are highly integrated single cell Li-Ion battery chargers targeted for space-limited, portable applications with high capacity batteries. The single cell charger has a single input that operates from (...)
使用指南: PDF
應用軟體及架構
TI-CHARGER-GUI — 適於與 USB2ANY 和電池充電搭配使用的 GUI 軟體評估模組
TI-CHARGER-GUI 提供網路型或獨立式圖形使用者介面，協助評估、設計、配置或測試電池充電器產品。該軟體提供暫存器的完整存取權，以及用於傳送及排序指令的簡易介面。
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 (...)
計算工具
SLUC436 — Thermal TS bq2425x Calculator Tool
支援產品和硬體
產品
電池充電器 IC
硬體開發
開發板
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YFF) | 30 | Ultra Librarian |
| VQFN (RGE) | 24 | Ultra Librarian |
訂購與品質
內含資訊：
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
內含資訊：
- 晶圓廠位置
- 組裝地點