参数资料
型号: AS3658F-BCTP
厂商: ams
文件页数: 59/158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
Table 49. Charger Config Register
Addr:13
Charger Config
These bits configure the charger
Bit
Bit Name
Default Access
Description
Sets the end-of-charge voltage level V CHOFF .
000b
001b
010b
3.90V
3.95V
4.00V
2:0
ChVoltEOC
ROM
011b
4.05V
100b
101b
110b
111b
4.10V
4.15V
4.20V
4.25V
Regulate down battery charging current on that level of
Vsupply during trickle charging and/or linear charging, to
prevent voltage drop on vsupply:
4:3
Vsupply_min
ROM
00b
3.90V
01b
10b
11b
000b
001b
010b
3.60V
4.20V
4.50V
Sets the resume voltage level V CHRES
3.85V
3.90V
3.95V
7:5
ChVoltResume
ROM
011b
4.00V
100b
101b
110b
111b
4.05V
4.10V
4.15V
4.20V
8.9.2 Fuel Gauge
The fuel gauge circuit enables remaining capacity estimation of the battery by tracking the net current flow into and out
of the battery using a voltage-to-frequency converter.
Voltage-to-Frequency Converter
The voltage-to-frequency (VFC) converter constantly monitors the voltage drop across an external current sense
resistor R sense connected in series between the negative battery terminal and ground. The use of an additional
external RC lowpass filter is highly recommended. Using two 4.7k Ω resistors (R filt1,2 ) and a 1μF ceramic capacitor
(C filt ), the filter cut-off is approximately 16.9 Hz. This filter will capture the effect of most spikes, and will thus allow the
current accumulators to accurately reflect the total charge that has gone into or out of the battery.
www.austriamicrosystems.com
Revision 1v13
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