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LTC1759

OPERATIO

Table 3. Charger_Controller Functional Features

CONDITION

ACTION

POWER_ON_RESET = 1

CHARGING_RESET_STATE =1

(Asynchronously Reset the Charger_Controller State Machine During

Power-On Reset)

CHARGING_RESET_STATE = 1 AND the Battery Is Present

CHARGING _WAKE-UP_STATE = 1

AND AC_PRESENT = 1 AND INHIBIT_CHARGE = 0 AND Thermistor Is

The Charger_Controller Will “Wake Up” Charge the Battery

Ideal

at IWAKE-UP Indefinitely

CHARGING_RESET_STATE = 1 AND the Battery Is Present

CHARGING_WAKE-UP_STATE = 1

AND AC_PRESENT =1 AND INHIBIT_CHARGE = 0 AND THERM_

The Charger_Controller Will “Wake Up” Charge the Battery

UR = 1 OR THERM_COLD = 1

at IWAKE-UP Until Condition 3 Is Met

CHARGING_WAKE-UP_STATE = 1 AND the Time-Out Period

CHARGING_NONE_STATE = 1

Exceeds tTIMEOUT AND THERM_UR = 1 OR THERM_COLD = 1

The Charger_Controller Stops Charging the Battery. It Cannot

“Wake Up” Charge Again Until Condition 15 Is Met. It Can Supply

“Controlled Charge” to the Battery If Conditions 8 or 9 Are Met

CHARGING_WAKE-UP_STATE = 1 AND an AlarmWarning() Message

CHARGING_NONE_STATE =1

Is Received with Any Bit in the Upper Nibble Set

The Charger_Controller Stops Charging the Battery. It Cannot

“Wake Up” Charge Again Until Condition 15 Is Met. It Can Supply

“Controlled Charge” to the Battery If Conditions 8 or 9 Are Met

CHARGING_WAKE-UP_STATE = 1 (from Condition 1 above) AND

CHARGING_NONE_STATE = 1

THERM_HOT Changes from 0 to 1 AND THERM_UR = 0

The Charger_Controller Stops Charging the Battery. It Cannot

“Wake Up” Charge Again Until Condition 15 Is Met. It Can Supply

“Controlled Charge” to the Battery If Conditions 8 or 9 Are Met

CHARGING_WAKE-UP_STATE = 1 (from Condition 2 above) AND

CHARGING_NONE_STATE = 1

THERM_UR Changes from 1 to 0 AND THERM_HOT = 1

The Charger_Controller Stops Charging the Battery. It Cannot

“Wake Up” Charge Again Until Condition 15 Is Met. It Can Supply

“Controlled Charge” to the Battery If Conditions 8 or 9 Are Met

CHARGING_WAKE-UP-STATE = 1 AND INHIBIT_CHARGE Is

CHARGING_WAKE-UP_STATE =1

Set to 1

The Charger_Controller Stops Charging the Selected Battery. The Timer

Continues to Run. The Charger Can Resume “Wake-Up” Charging If

INHIBIT_CHARGE = 0

(CHARGING_WAKE-UP_STATE = 1 OR CHARGING_NONE_STATE = 1)

CHARGING_CONTROLLED_STATE = 1

AND (Both ChargingCurrent() AND ChargingVoltage() Commands

The Charger_Controller Will Supply “Controlled Charge” to the

Are Received within tTIMEOUT) AND INHIBIT_CHARGE = 0

Battery as Specified in the Current and Voltage Commands

AND THERM_HOT = 0

(CHARGING_WAKE-UP_STATE = 1 OR CHARGING_NONE_STATE = 1)

CHARGING_CONTROLLED_STATE = 1

AND (Both ChargingCurrent() AND ChargingVoltage() Commands

The Charger_Controller Will Supply “Controlled Charge” to the

Are Received within tTIMEOUT) AND INHIBIT_CHARGE = 0

Battery as Specified in the Current and Voltage Commands

AND THERM_UR = 1

CHARGING_CONTROLLED_STATE = 1

CHARGING_NONE_STATE = 1

AND No New ChargingCurrent() and ChargingVoltage() Commands Are

The Charger_Controller Stops Charging the Battery. It Cannot

Received for a Time-Out Period of tTIMEOUT

“Wake Up” Charge Again Until Condition 15 Is Met. It Can Supply

“Controlled Charge” to the Battery If Conditions 8 or 9 Are Met

CHARGING_CONTROLLED_STATE = 1

CHARGING_NONE_STATE = 1

The Charger_Controller Is Supplying “Controlled Charge” to the

The Charger_Controller Stops Charging the Battery. It Cannot

Battery AND (an AlarmWarning() Message Is Received

“Wake Up” Charge Again Until Condition 15 Is Met. It Can Supply

with Any Bit in the Upper Nibble Set)

“Controlled Charge” to the Battery If Conditions 8 or 9 Are Met

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