支援軟體
BQ24295
- 90% High Efficiency Switch Mode 3-A Charger
- 3.9-V to 6.2-V Single Input USB-Compliant Charger with 6.4-V Over-Voltage Protection
- USB Host or Charging Port D+/D– Detection Compatible to USB Battery Charger Spec (BC1.2)
- Support Non-Standard 2-A/1-A Adapters Detection
- Input Voltage and Current Limit Supports USB2.0 and USB 3.0
- Input Current Limit: 100 mA, 150 mA, 500 mA, 900 mA, 1 A, 1.5 A, 2 A, and 3 A
- Synchronous Boost Converter in Battery Boost Mode with
- Adjustable Output 4.55 V – 5.5 V at 1.5 A
- 90% 5.1-V Boost Mode Efficiency
- Fast OTG Startup (22 ms Typ)
- Narrow VDC (NVDC) Power Path Management
- Instant System On with No Battery or Deeply Discharged Battery
- Ideal Diode Operation in Battery Supplement Mode
- 1.5-MHz Switching Frequency for Low Profile 1.2-mm Inductor
- I2C Port for Optimal System Performance and Status Reporting
- Autonomous Battery Charging with or without Host Management
- Battery Charge Enable
- Battery Charge Preconditioning
- Charge Termination and Recharge
- High Accuracy
- ±0.5% Charge Voltage Regulation
- ±7% Charge Current Regulation
- ±7.5% Input Current Regulation
- ±3% Output Voltage Regulation in Boost Mode
- High Integration
- Power Path Management
- Synchronous Switching MOSFETs
- Integrated Current Sensing
- Bootstrap Diode
- Internal Loop Compensation
- Safety
- Battery Temperature Sensing for Charging and Discharging in Boost Mode
- Battery Charging Safety Timer
- Thermal Regulation and Thermal Shutdown
- Input and System Over-Voltage Protection
- MOSFET Over-Current Protection
- Charge Status Outputs for LED or Host Processor
- Maximum Power Tracking Capability by Input Voltage Regulation
- 20-µA Low Battery Leakage Current and Support Shipping Mode
- 4mm × 4mm VQFN-24 Package
The bq24295 is a highly-integrated switch-mode battery charge management and system power path management devices for 1 cell Li-Ion and Li-polymer battery in a wide range of power bank, tablet and other portable device applications.
Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution.
The device supports 3.9V – 6.2V USB input sources, including standard USB host port and USB charging port with 6.4V over-voltage protection. The bq24295 is compliant with USB 2.0 and USB 3.0 power specifications with input current and voltage regulation. To set the default input current limit, the bq24295 detects the input source through D+/D– detection following the USB battery charging spec 1.2. In addition, the bq24295 detects non-standard 2A/1A adapters. The bq24295 supports battery boost operation by supplying adjustable voltage 4.55 – 5.5V (default 5.1V) on PMID pin with minimum current of 1.5A.
The power path management regulates the system slightly above battery voltage but does not drop below 3.5V minimum system voltage (programmable). With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This supplement mode operation prevents overloading the input source.
The devices initiate and complete a charging cycle without software control. It automatically detects the battery voltage and charges the battery in three phases: pre-conditioning, constant current and constant voltage. At the end of the charging cycle, the charger automatically terminates when the charge current is below a preset limit in the constant voltage phase. When the full battery falls below the recharge threshold, the charger will automatically start another charging cycle.
The devices provide various safety features for battery charging and system operation, including negative thermistor monitoring, charging safety timer and over-voltage/over-current protections. The thermal regulation reduces charge current when the junction temperature exceeds 120°C (programmable).
The STAT output reports the charging status and any fault conditions. The INT immediately notifies the host when a fault occurs.
The bq24295 is available in a 24-pin, 4×4 mm2 thin VQFN package.
技術文件
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檢視所有 5 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | bq24295 I2C Controlled 3A Single Cell USB Charger With Narrow VDC 4.5-5.5V Adjustable Voltage at 1.5A Synchronous Boost Operation datasheet (Rev. B) | PDF | HTML | 2016年 12月 30日 |
| Application note | Selection of Single-Cell Buck Narrow VDC Switching Battery Chargers | PDF | HTML | 2022年 11月 10日 | |
| Application note | USB D+/D- Input Current Limit Detection | PDF | HTML | 2020年 12月 30日 | |
| Analog Design Journal | Extract maximum power from the supply when charging a battery | 2014年 4月 11日 | ||
| EVM User's guide | bq24295EVM-549 (PWR549) User's Guide (Rev. B) | 2014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
BQ24295EVM-549 — 具有可調整電壓和 1.5A OTG 的 I2C 控制 3A 單芯充電器評估模組
I2C Controlled 2.5A Single Cell Charger with Narrow VDC Power Path Management and USB OTG, 5V and 1.5 ADC maximum
The BQ24295EVM requires USB Interface Adaptive Evaluation Module “USB-TO-GPIO” for I2C interface. If one is not already available to you and I2C is needed then one can be (...)
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。
| 封裝 | 引腳 | 下載 |
|---|---|---|
| VQFN (RGE) | 24 | 檢視選項 |
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
- 資格摘要
- 進行中可靠性監測
內含資訊：
- 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。