BQ24157S
- Integrated Power FETs for up to 1.55-A Charge
Rate - Spread Spectrum Frequency Control for Improved
EMI Performance - High-Accuracy Voltage and Current Regulation
- Input Current Regulation Accuracy:
±5% (100 mA and 500 mA) - Charge Voltage Regulation Accuracy:
±0.5% (25°C), ±1% (0°C to 125°C) - Charge Current Regulation Accuracy: ±5%
- Input Current Regulation Accuracy:
- Factory Test-Mode for GSM Calibration Without a
Battery - Input Voltage Based Dynamic Power
Management (VIN DPM) - Bad Adaptor Detection and Rejection
- Safety Limit Register for Maximum Charge
Voltage and Current Limiting - High-Efficiency Mini-USB/AC Battery Charger for
Single-Cell Li-Ion and Li-Polymer Battery Packs - 20-V Absolute Maximum Input Voltage Rating
- 6.5-V Maximum Operating Input Voltage
- Programmable Charge Parameters through I2C
Compatible Interface (up to 3.4 Mbps):- Input Current Limit
- VIN DPM Threshold
- Fast-Charge/Termination Current
- Charge Regulation Voltage (3.5 to 4.44 V)
- Low Charge Current Mode Enable/Disable
- Termination Enable/Disable
- Synchronous Fixed-Frequency PWM Controller
Operating at 3 MHz With 0% to 99.5% Duty Cycle - Automatic High Impedance Mode for Low Power
Consumption - Robust Protection
- Reverse Leakage Protection Prevents Battery
Drainage - Thermal Regulation and Protection
- Input/Output Overvoltage Protection
- Reverse Leakage Protection Prevents Battery
- Status Output for Charging and Faults
- USB Friendly Boot-Up Sequence
- Automatic Charging
- Power Up System Without Battery
- Boost Mode Operation for USB OTG:
- Input Voltage Range (from Battery):
3.2 to 4.5 V - Output for VBUS: 5.05 V, 350 mA
- Input Voltage Range (from Battery):
- 2.1 × 2.0-mm, 20-Pin DSBGA Package
- Pin-to-Pin Compatible With bq24157 and bq24158
The bq24157S is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The IC integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small DSBGA package.
The IC charges the battery in three phases: conditioning, constant current, and constant voltage. The input current is automatically limited to the value set by the host.
Charge is terminated based on battery voltage and user-selectable minimum current level. During normal operation, the IC automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status can be reported to the host using the I2C interface. During the charging process, the IC monitors its junction temperature (TJ) and reduces the charge current after TJ increases to about 125°C. To support a USB OTG device, bq24157S can provide VBUS (5.05 V) by boosting the battery voltage. The IC is available in 20-pin DSBGA package.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | bq24157S 1.55-A Fully Integrated Switch-Mode One-Cell Li-Ion Charger With Full USB Compliance and USB-OTG Support datasheet (Rev. B) | PDF | HTML | 2015年 5月 5日 |
| Application note | Building your own Battery Simulator | 2013年 10月 14日 |
設計與開發
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BQ24157EVM-697 — BQ24157EVM-697 評估模組
BQ2415XSW-LINUX — 適用於 BQ2415X 的 Linux 驅動程式
Linux mainline status
Available in Linux mainline: Yes
Available through git.ti.com: (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YFF) | 20 | 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