ZHCSDC8A December 2014 – November 2017
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 说明 （续）
- 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 Up
- 8.3.2 Power Path Management
- 8.3.3 Battery Charging Management
- 8.3.4 Status Outputs (PG, STAT, and INT)
- 8.3.5 Protections
- 8.3.6 Serial Interface
- 8.4 Device Functional Modes
- 8.5
Register Map
- 8.5.1
I2C Registers
- 8.5.1.1 Input Source Control Register REG00 (reset = 00110000, or 30)
- 8.5.1.2 Power-On Configuration Register REG01 (reset = 00011011, or 1B)
- 8.5.1.3 Charge Current Control Register REG02 (reset = 01100000, or 60)
- 8.5.1.4 Pre-Charge/Termination Current Control Register REG03 (reset = 00010001, or 11)
- 8.5.1.5 Charge Voltage Control Register REG04 (reset = 10110010, or B2)
- 8.5.1.6 Charge Termination/Timer Control Register REG05 (reset = 10011010, or 9A)
- 8.5.1.7 IR Compensation / Thermal Regulation Control Register REG06 (reset = 00000011, or 03)
- 8.5.1.8 Misc Operation Control Register REG07 (reset = 01001011, or 4B)
- 8.5.1.9 System Status Register REG08
- 8.5.1.10 Fault Register REG09
- 8.5.1.11 Vender / Part / Revision Status Register REG0A (reset = 00101111, or 2F)
- 8.5.1
I2C Registers
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文档支持
- 13机械、封装和可订购信息
8.3.2.3 Supplement Mode
When the system voltage falls below the battery voltage, the BATFET turns on and the BATFET gate is regulated the gate drive of BATFET so that the minimum BATFET VDS stays at 30 mV when the current is low. This prevents oscillation from entering and exiting the supplement mode. 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. Figure 12 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.
Figure 12. BATFET V-I Curve