PS401-I/SS Microchip Technology, PS401-I/SS Datasheet - Page 29

• Manufacturer Part Number: PS401-I/SS
• Description: IC FUEL GAUGE BATTERY MGR 28SSOP
• Manufacturer: Microchip Technology

Specifications of PS401-I/SS

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TABLE 8-4:
 2003 Microchip Technology Inc.
EOCCurAvg
EOCRecheck
EOCVolt
MaxSOC
MaxTemp
PrechargeCurr
PrechargeMax
PrechargeTemp
PrechargeVCell
Parameter
Name
CHARGE CONTROL (CONTINUED)
Loc.
OTP
OTP
OTP
OTP
OTP
OTP
EE
EE
EE
# Bytes
2
1
2
1
2
2
2
2
2
Lower
Limit
0
0
0
0
0
0
0
0
0
Upper
65535
65535
65535
65535
65535
65535
65535
Limit
255
255
Typical
Value
4175
1000
2500
100
200
750
500
250
6
EOC trigger for pulse charging. If the
average current during charging with the
CFET turned off has dropped below the
AvgCurrEOCThresh threshold for a pass
count equal to the EEPROM parameter
value ChrgCntrlTimr (typically between 8
and 16) the End-Of-Charge state will be
reached.
Delay filter for the EOC condition. Number
of checks before EOC trigger. The end of
charge conditions must remain for at least
this number of periods before being
considered true, to help filter out false full
conditions due to spikes.
EOC trigger cell voltage. When any cell in
the battery pack reaches this voltage, the
end-of-charge determination will start
monitoring the average current to determine
when the battery is full. When the average
current is in the proper range, and the cell
voltage is greater than EOC_VOLT, then
FULLY_CHARGED bit in BatteryStatus will
be set, and terminate charge alarm will be
active.
Maximum state-of-charge, 128 = 100%.
This is the maximum state-of-charge that
the battery fuel gauge should register.
Typically set to 100% so that any
overcharge is not displayed as a battery
more than 100% full.
Maximum temperature measured (including
external and internal sensor). Coded
value = (Celsius*10+200). This is where
the PS401 keeps track of the highest
temperature it has measured.
Precharge current required. Posted to
SBData ChargingCurrent during precharge
conditions.
Maximum precharge current allowed. When
exceeded under precharge conditions,
SBData ChargingCurrent is set to zero.
Precharge temperature, coded
value = (Temp[°C] + 20) x 10. This is the
temperature under which precharging
should occur.
Precharge cell voltage. This is the voltage
under which precharging should occur.
Operational Description
DS40238B-page 29
PS401