ZHCSJI9A March 2019 – June 2019 BQ25886
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Device Power-On-Reset
- 8.3.2 Device Power Up from Battery without Input Source
- 8.3.3 Device Power Up from Input Source
- 8.3.4 Input Current Optimizer (ICO)
- 8.3.5 Buck Mode Operation from Battery (OTG)
- 8.3.6 PowerPath Management
- 8.3.7 Battery Charging Management
- 8.3.8 Status Outputs
- 8.3.9 Input Current Limit on ILIM Pin
- 8.3.10 Voltage and Current Monitoring
- 8.3.11 Thermal Regulation and Thermal Shutdown
- 8.3.12 Battery Protection
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
8.3.6.3 Supplement Mode
When the voltage falls below the battery voltage, the BATFET turns on.
As the discharge current increases, the BATFET gate is regulated with a higher voltage to reduce RDSON until the BATFET is in full conduction. At this point onwards, the BATFET VDS linearly increases with discharge current. The figure shows the V-I curve of the BATFET gate regulation operation. BATFET turns off to exit Supplement Mode when the battery is below battery depletion threshold (VBAT_UVLO_RISING).
Figure 16. BATFET I-V Curve