ZHCSKO3B January 2020 – September 2020 BQ25611D
PRODUCTION DATA
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Revision History
- 5 說明（續(xù)）
- 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 Power-On-Reset (POR)
- 9.3.2 Device Power Up from Battery without Input Source
- 9.3.3 Power Up from Input Source
- 9.3.4 Boost Mode Operation From Battery
- 9.3.5 Power Path Management
- 9.3.6 Battery Charging Management
- 9.3.7 Ship Mode and QON Pin
- 9.3.8 Status Outputs ( STAT, INT )
- 9.3.9 Protections
- 9.3.10 Serial Interface
- 9.4 Device Functional Modes
- 9.5 Register Maps
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
- RTW|24
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
- RTW|24
訂購信息
9.3.5.2 Dynamic Power Management
To meet the maximum current limit in the USB specification and avoid overloading the adapter, the device features Dynamic Power Management (DPM), which continuously monitors the input current and input voltage. When input source is overloaded, either the current exceeds the input current limit (IINDPM) or the voltage falls below the input voltage limit (VINDPM). The device then reduces the charge current until the input current falls below the input current limit or the input voltage rises above the input voltage limit.
When the charge current is reduced to zero, but the input source is still overloaded, the system voltage starts to drop. Once the system voltage falls below the battery voltage, the device automatically enters the supplement mode where the BATFET turns on and the battery starts discharging so that the system is supported from both the input source and battery.
During DPM mode, the status register bits VINDPM_STAT or IINDPM_STAT go to 1.
Figure 9-2 shows the DPM response with 9-V/1.2-A adapter, 3.2-V battery, 2.8-A charge current and 3.5-V minimum system voltage setting.
Figure 9-2 DPM
Response