参数资料
型号: AS3658F-BCTP
厂商: ams
文件页数: 45/158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
8.7
External Step Down/Linear Charger
The inductive dcdc step down charger (or the external linear charger) converts the input voltage from V CHARGER to
V SUPPLY . The system (DCDC converters, LDOs…) are connected directly to V SUPPLY ; the ideal diode and the internal
battery switch S INT (together with the external battery switch M BATSW ) connect V SUPPLY to V BAT to allow charging of
the battery.
Figure 14. Step Down Charger Application Diagram with optional reverse polarity and short protection
 
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If the input voltage can be up to 50V additional three transistors and a simple voltage regulator with a zener diode are
required. These circuit ‘isolates’ the AS3658 from the high input voltage and keep the pins VCHARGER, VOFF_B and
VGATE within its operating limits (<15V). The actual circuit is shown in the following figure:
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