参数资料
型号: AS3658D-BCTP
厂商: ams
文件页数: 62/158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
Calculating the Time to Empty
The time to empty is calculated from the average current I AVG given by (4). The longer the time period for which I AVG is
calculated, the more accurate the value for I AVG and therefore the estimated time to empty will be. It is given by:
Table 51. Fuel Gauge Bit definitions
TTE = RC / I AVG [s]
(EQ 7)
Addr:15
Fuel Gauge
These bits configures the fuel gauge
Bit
Bit Name
Default Access
Description
0
FGEn
ROM
R/W
0
1
Disable Fuel Gauge
Enable Fuel Gauge
This bit controls the update of the DeltaCharge and
ElapsedTime registers. When set, the bit is cleared
automatically after the registers have been updated
1
UpdReq
ROM
R/W
successfully. Bit should not be set to “0” by the host
0
1
Update of registers complete
Request update of registers
This bit controls the offset calibration. When set, the bit is
cleared automatically after the calibration has completed
successfully.
2
CalReq
ROM
R/W
0
Calibration complete OR terminate offset
calibration
1
00
Request offset calibration
Sets the mode for offset calibration
Connect inputs to ground internally
4:3
CalMod
ROM
R/W
01
Use ISENSP and ISENSN (do not use)
10
11
do not use
do not use
Table 52. Delta Charger MSB bit definitions
DeltaChargeMSB
Addr:101
These bits represent the MSB value of the fuel gauge Delta charge
register
Bit
Bit Name
Default
Access
Description
The register is maintained in two’s complement format
6:0
DeltaChargeMSB
(00)h
R
with a resolution of 3.05μVh and a full-scale value of
±99.98mVh. When using a 50m Ω current sense resistor
this is equivalent to a resolution of 61.03μAh and a full-
scale value of 1.999Ah. Sign is set for negative values.
Register will be updated after setting bit UpdReq to “1”.
7
sign
0
R
Sign bit of the delta charge register
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Revision 1v13
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