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AS3658 датащи(PDF) 62 Page - ams AG

номер детали AS3658
подробное описание детали  Power and Audio Management Unit for Portable Devices
PDF  158 Pages
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производитель  AMSCO [ams AG]
домашняя страница  http://www.ams.com
Logo AMSCO - ams AG

AS3658 датащи(HTML) 62 Page - ams AG

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Revision 1v13
61 - 157
AS3658
Data Sheet Confidential - Detail ed Descri ption-Power Management Functions
Calculating the Time to Empty
The time to empty is calculated from the average current IAVG given by (4). The longer the time period for which IAVG is
calculated, the more accurate the value for IAVG and therefore the estimated time to empty will be. It is given by:
TTE = RC / IAVG [s]
Table 51. Fuel Gauge Bit definitions
Addr:15
Fuel Gauge
These bits configures the fuel gauge
Bit
Bit Name
Default Access
Description
Table 52. Delta Charger MSB bit definitions
Addr:101
DeltaChargeMSB
These bits represent the MSB value of the fuel gauge Delta charge
register
Bit
Bit Name
Default
Access
Description
(EQ 7)
0
FGEn
ROM
R/W
0
Disable Fuel Gauge
1
Enable Fuel Gauge
1
UpdReq
ROM
R/W
This bit controls the update of the DeltaCharge and
ElapsedTime registers. When set, the bit is cleared
automatically after the registers have been updated
successfully. Bit should not be set to “0” by the host
0
Update of registers complete
1
Request update of registers
2
CalReq
ROM
R/W
This bit controls the offset calibration. When set, the bit is
cleared automatically after the calibration has completed
successfully.
0
Calibration complete OR terminate offset
calibration
1
Request offset calibration
4:3
CalMod
ROM
R/W
Sets the mode for offset calibration
00
Connect inputs to ground internally
01
Use ISENSP and ISENSN (do not use)
10
do not use
11
do not use
6:0
DeltaChargeMSB
(00)h
R
The register is maintained in two’s complement format
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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