ZHCSDI5C March 2015 – October 2022 BQ25895
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 說明（續）
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Functional Block Diagram
- 8.2
Feature Description
- 8.2.1 Device Power-On-Reset (POR)
- 8.2.2 Device Power Up from Battery without Input Source
- 8.2.3 Device Power Up from Input Source
- 8.2.4 Input Current Optimizer (ICO)
- 8.2.5 Boost Mode Operation from Battery
- 8.2.6 Power Path Management
- 8.2.7 Battery Charging Management
- 8.2.8 Battery Monitor
- 8.2.9 Status Outputs (STAT, and INT)
- 8.2.10 BATET (Q4) Control
- 8.2.11 Current Pulse Control Protocol
- 8.2.12 Input Current Limit on ILIM
- 8.2.13 Thermal Regulation and Thermal Shutdown
- 8.2.14 Voltage and Current Monitoring in Buck and Boost Mode
- 8.2.15 Battery Protection
- 8.2.16 Serial Interface
- 8.3 Device Functional Modes
- 8.4 Register Maps
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
8.2.7.2 Battery Charging Profile
The device charges the battery in three phases: preconditioning, constant current and constant voltage. At the beginning of a charging cycle, the device checks the battery voltage and regulates current / voltage.
Table 8-5 Charging Current Setting
| VBAT | CHARGING CURRENT | REG DEFAULT SETTING | CHRG_STAT |
|---|---|---|---|
| < 2 V | IBATSHORT | – | 01 |
| 2 V – 3 V | IPRECHG | 128 mA | 01 |
| > 3 V | ICHG | 2048 mA | 10 |
If the charger device is in DPM regulation or thermal regulation during charging, the charging current can be less than the programmed value. In this case, termination is temporarily disabled and the charging safety timer is counted at half the clock rate.
Figure 8-5 Battery
Charging Profile