PS501 datasheet(24/42 Pages) MICROCHIP

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PS501

DS21818C-page 24

 2004 Microchip Technology Inc.

TABLE 8-2:

PS501 ALARMS AND STATUS SUMMARY

TABLE 8-3:

Temperature, ChargingCurrent ( ) AND ChargingVoltage ( ) SUMMARY

For all other temperature conditions: ChargingCurrent ( ) = ChrgCurr

ChargingVoltage ( ) = ChrgVolt

Battery Status

Set Condition

Clear Condition

FULLY_CHARGED bit

Set at End-Of-Charge Condition:

Charge FET off

AND

Any VC(x) input > 4.175V

AND

IAVG < EOC_IAVG for ChrgCntrlTimer number

of consecutive counts

RelativeStateOfCharge ( ) < ClrFullyChrg

(default RSOC = 80%)

OVER_CHARGED_ALARM bit

VCELLx > TCAVolt (default 4.5V/Cell)

All VCELLx < TCAVolt

TERMINATE_CHARGE_ALARM bit

VCELLx > TCAVolt (default 4.5V/Cell)

Charging Temperature ( ) > ChrgMaxTemp

(default 60°C)

FULLY_CHARGED bit = 1

All VCELLx < TCAVolt

AND

Temperature ( ) < ChrgMaxTemp

AND

Current ( ) = < 0

OVER_TEMP_ALARM bit

Temperature ( ) > HighTempAl (default 55°C)

Temperature ( ) < HighTempAl

TERMINATE_DISCHARGE_ALARM bit Primary Method:

VCELLx < VEOD1 (per look-up table)

AND

Above condition continues for

NearEODRecheck time.

Secondary Method:

VCELLx < VEOD2 (default 3.1V/Cell)

AND

Above condition continues for EODRecheck time.

Primary Method:

All VCELLx > VEOD1

Current ( ) > 0

Secondary Method:

All VCELLx > VEOD2

Current ( ) > 0

REMAINING_CAPACITY_ALARM bit

RemainingCapacity ( ) <

RemainingCapacityAlarm ( )

RemainingCapacity ( ) >

RemainingCapacityAlarm ( )

REMAINING_TIME_ALARM bit

AverageTimeToEmpty ( ) <

RemainingTimeAlarm ( )

AverageTimeToEmpty ( ) >

RemainingTimeAlarm ( )

FULLY_DISCHARGED bit

RemainingCapacity ( ) = 0

RelativeStateOfCharge ( ) > ClrFullyDischrg

(default RSOC = 20%)

Temperature ( ) > HighTempAI (default 60°C)

Charging

Discharging

TERMINATE_CHARGE_ALARM and OVER_TEMP_ALARM

OVER_TEMP_ALARM

Cleared

Temperature ( ) < HighTempAI

Temperature ( ) > ChrgMaxTemp

(default 50°C)

Temperature ( ) > DischrgMaxTemp

(default 65°C)

Charging

Discharging

ChargingCurrent ( ) = ChrgCurrOff

ChargingVoltage ( ) = ChrgVoltOff

Temperature ( ) < ChrgMinTemp

ChargingCurrent ( ) = ChrgCurrOff

ChargingVoltage ( ) = ChrgVolt

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