ZHCSBL6D september 2013 – april 2023 BQ24296 , BQ24297
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Description (continued)
- 6 Device Comparison Table
- 7 Pin Configuration and Functions
- 8 Specifications
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3
Feature Description
- 9.3.1 Device Power Up
- 9.3.2 Power Path Management
- 9.3.3 Battery Charging Management
- 9.3.4 Status Outputs ( PG, STAT, and INT)
- 9.3.5 Protections
- 9.4 Device Functional Modes
- 9.5 Programming
- 9.6
Register Map
- 9.6.1
I2C Registers
- 9.6.1.1 Input Source Control Register REG00 [reset = 00110xxx, or 3x]
- 9.6.1.2 Power-On Configuration Register REG01 [reset = 00011011, or 0x1B]
- 9.6.1.3 Charge Current Control Register REG02 [reset = 01100000, or 60]
- 9.6.1.4 Pre-Charge/Termination Current Control Register REG03 [reset = 00010001, or 0x11]
- 9.6.1.5 Charge Voltage Control Register REG04 [reset = 10110010, or 0xB2]
- 9.6.1.6 Charge Termination/Timer Control Register REG05 [reset = 10011010, or 0x9A]
- 9.6.1.7 Boost Voltage/Thermal Regulation Control Register REG06 [reset = 01110011, or 0x73]
- 9.6.1.8 Misc Operation Control Register REG07 [reset = 01001011, or 4B]
- 9.6.1.9 System Status Register REG08
- 9.6.1.10 New Fault Register REG09
- 9.6.1.11 Vender / Part / Revision Status Register REG0A
- 9.6.1
I2C Registers
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
9.3.3.2 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 applies current.
Table 9-5 Charging Current Setting
| VBAT | CHARGING CURRENT | REG DEFAULT SETTING | REG08[5:4] |
|---|---|---|---|
| VBAT < VSHORT (Typical 2 V) | 100 mA | – | 01 |
| VSHORT ≤ VBAT < VBATLOWV (Typical 2 V ≤ VBAT < 3 V) | REG03[7:4] | 256 mA | 01 |
| VBAT ≥ VBATLOWV (Typical VBAT ≥ 3 V) | REG02[7:2] | 2048 mA | 10 |
If the charger device is in DPM regulation or thermal regulation during charging, the actual charging current will 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 9-6 Battery Charging Profile