参数资料
型号: AS3658D-BCTP
厂商: ams
文件页数: 42/158页
文件大小: 0K
描述: IC PMU POWER/AUDIO 124-CTBGA
标准包装: 2,500
应用: 便携式设备
电流 - 电源: 7mA
电源电压: 3 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 124-TFBGA
供应商设备封装: 124-CTBGA(8x8)
包装: 带卷 (TR)
AS3658
Data Sheet Confidential
- Detailed Description-Power Management Functions
8.5
Smooth switchover Power Management Overview
Figure 12. Power Source Management Architecture
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The power source management architecture handles the smooth transitions between the two chargers (USB Charger
on VBUS, DCDC Step Down charger or Linear Charger on VCHARGER) and the battery. It takes care about the
system power supply V SUPPLY and its power requirements.
There are following operating conditions possible
1. No Charger connected
The internal switch S INT and the (optional) external switch M BATSW are closed and V SUPPLY is directly supplied by
V BAT . Because of the very low impedance of the switches the energy losses are minimized.
2. The active charger can deliver more current than the system requires
The system is directly supplied by the charger and the remaining energy can be used to charge the battery (CC/CV
charger). In case of deeply discharged batteries, the system is always immediately started and the internal current
source between V SUPPLY and V BAT delivers the trickle current to the battery.
3. The current limited (e.g. for USB with 500mA) charger cannot deliver the current, the system requires
In this case, the ideal diode starts conducting and delivers the remaining current to the system
The transitions between the different power states are done autonomously by the AS3658 allowing an uninterrupted
operation of the system.
The blocks are described in more detail in the following sections.
www.austriamicrosystems.com
Revision 1v13
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