PS401-I/SS Microchip Technology, PS401-I/SS Datasheet - Page 19

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

Specifications of PS401-I/SS

• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification

Bit 10-13: Reserved
Bit 14: CHARGER_MODE
Enables or disables the Smart Battery's transmission of
ChargingCurrent and ChargingVoltage messages to
the Smart Battery Charger. When set, the Smart
Battery will NOT transmit ChargingCurrent and
ChargingVoltage values to the charger. When cleared,
the Smart Battery will transmit the ChargingCurrent
and ChargingVoltage values to the charger when
charging is desired.
Bit 15: CAPACITY_MODE
Indicates if capacity information will be reported in
mA/mAh or 10 mW/10 mWh. When set, the capacity
information will be reported in 10 mW/10 mWh. When
cleared, the capacity information will be reported in
mA/mAh.
7.1.5
AtRate is a value of current or power that is used
by
AtRateTimeToEmpty and AtRateOK.
• AtRateTimeToFull returns the predicted time to full
• AtRateTimeToEmpty function returns the
• AtRateOK function returns a Boolean value that
7.1.6
Returns the predicted remaining time to fully charge the
battery at the AtRate value (mA). The AtRateTimeTo
Full function is part of a two-function call set used to
determine the predicted remaining charge time at the
AtRate value in mA. It will be used immediately after
the SMBus Host sets the AtRate value.
7.1.7
Returns the predicted remaining operating time if the
battery is discharged at the AtRate value. The
AtRateTimeToEmpty function is part of a two-function
call set used to determine the remaining operating time
at the AtRate value. It will be used immediately after the
SMBus Host sets the AtRate value.
 2003 Microchip Technology Inc.
charge at the AtRate value of charge current.
predicted operating time at the AtRate value of
discharge current.
predicts the battery's ability to supply the AtRate
value of additional discharge current for 10
seconds.
three
AtRate (0x04)
AtRateTimeToFull (0x05)
AtRateTimeToEmpty (0x06)
other
functions:
AtRateTimeToFull,
7.1.8
Returns a Boolean value that indicates whether or not
the battery can deliver the AtRate value of additional
energy for 10 seconds (Boolean). If the AtRate value is
zero or positive, the AtRateOK function will ALWAYS
return true. The AtRateOK function is part of a
two-function call set used by power management
systems to determine if the battery can safely supply
enough energy for an additional load. It will be used
immediately after the SMBus Host sets the AtRate
value.
7.1.9
Returns the cell pack's internal temperature in units of
0.1°K.
7.1.10
Returns the pack voltage (mV).
7.1.11
Returns the current being supplied (or accepted)
through the battery's terminals (mA).
7.1.12
Returns a one-minute rolling average based on at least
60 samples of the current being supplied (or accepted)
through the battery's terminals (mA).
7.1.13
Returns the expected margin of error (%) in the state-
of-charge calculation. For example, when MaxError
returns 10% and RelativeStateOfCharge returns 50%,
the RelativeStateOfCharge is actually between 50%
and 60%. The MaxError of a battery is expected to
increase until the Smart Battery identifies a condition
that will give it higher confidence in its own accuracy.
For example, when a Smart Battery senses that it has
been fully charged from a fully discharged state, it may
use that information to reset or partially reset MaxError.
The Smart Battery can signal when MaxError has
become too high by setting the CONDITION_FLAG bit
in BatteryMode.
7.1.14
Returns the predicted remaining battery capacity
expressed as a percentage of FullChargeCapacity (%).
AtRateOK (0x07)
Temperature (0x08)
Voltage (0x09)
Current (0x0a)
AverageCurrent (0x0b)
MaxError (0x0c)
RelativeStateOfCharge (0x0d)
DS40238B-page 19
PS401