BQ25970
- 97% Efficient power stage for 8-A fast charge
- Patent pending switched cap charger architecture optimized for 50% duty cycle
- Input voltage is 2x battery voltage (3.5 V to 4.65 V)
- Output current is 2x of input current (up to
4.5 A) - Reduces power loss across the cable
- Integrated programmable protection features for safe operation
- Input over-voltage protection (BUS_OVP)
- Input over-current protection (BUS_OCP) with adjustable alarm
- Input over-voltage with external OVP FET (VAC_OVP up to 17 V, BQ25970 only)
- Battery over-voltage protection (BAT_OVP) with adjustable alarm
- Output over-voltage (VOUT_OVP)
- Input over-current protection (BUS_OCP) with adjustable alarm
- IBAT over-current protection (BAT_OCP) with adjustable alarm
- Switching MOSFET cycle by cycle current limit
- Battery temperature monitoring
- Connector Temperature Monitoring
- Programmable settings for system optimization
- Optional VBATREG and IBATREG regulation for system load and wall adapter transients (BQ25970 only with External OVP FET)
- STAT, FLAG, and MASK options for interrupts
- ADC Readings and configuration
- Integrated 12-bit effective analog-to digital converter (ADC)
- ±0.5% BUS Voltage
- ±0.5% VOUT Voltage
- –0.4% to 0.2% BAT Voltage with differential sensing
- ±1.5% BAT Current at 6 A with external RSENSE
- ±1% BAT Temperature
- ±1% BUS Temperature
- ±4°C Die temperature
The BQ2597x is a 97% efficient, 8-A battery charging solution using a switched cap architecture. This architecture and the integrated FETs are optimized to enable a 50% duty cycle, allowing the cable current to be half the current delivered to the battery, reducing the losses over the charging cable as well as limiting the temperature rise in the application.
The dual-phase architecture reduces the input cap requirements as well as reducing the output voltage ripple. When used with a standard charger such as the BQ2589x, the system enables the fastest charging at the lowest power loss from pre-charge through CC, CV, and termination.
The device integrates all the necessary protection features to ensure safe charging, including input over-voltage and over-current protection, output over-voltage and over-current protection, temperature sensing for the battery and cable, and monitoring the die temperature.
The device includes a 12-bit effective analog-to-digital converter (ADC) to provide bus voltage, bus current, output voltage, battery voltage, battery current, bus temperature, bat temperature, die temperature, and other calculated measurements needed to manage the charging of the battery from the smart wall adapter or power bank.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | BQ25970, BQ25971 I2C Controlled Single Cell High Efficiency 8-A Switched Cap Fast Chargers With ADC datasheet (Rev. B) | PDF | HTML | 2020年 4月 20日 |
| Application note | How to use the BQ25970 for Flash Charging (Rev. A) | PDF | HTML | 2022年 10月 20日 | |
| EVM User's guide | Using the BQ25970EVM-893 (Rev. A) | 2018年 12月 21日 | ||
| Application note | 具有高效率电荷泵（Charge Pump Charger）充电系统介绍 | 2018年 8月 6日 |
設計與開發
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BQ25970EVM-893 — bq25970 完整充電器評估模組
TIDA-01582 — 適用於 USB 電力傳輸可編程電源供應的開關電容快速充電參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YFF) | 56 | Ultra Librarian |
訂購與品質
- 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
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。