LTC1759 Ver la hoja de datos (PDF) - Linear Technology
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LTC1759 Datasheet PDF : 28 Pages
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LTC1759
U
OPERATIO
FUNCTION
ChargingCurrent()
ChargingVoltage()
AlarmWarning()
FIELD
THERM_UR
ALARM_INHIBITED
POWER_FAIL
BATTERY_PRESENT
AC_PRESENT
CHARGING_CURRENT
[15:0]
CHARGING_VOLTAGE
[15:0]
OVER_CHARGED_
ALARM
TERMINATE_CHARGE_
ALARM
RESERVED_ALARM1
OVER_TEMP_ALARM
WORD BIT
MAPPING
11
12
13
14
15
15:0
15:0
15
14
13
12
POWER-ON
RESET VALUE
(BINARY)
Value
0
Value
Value
Value
0
0
0
0
0
0
ALLOWED VALUES
• 0 – Thermistor Indicates Not Underrange
• 1 – Thermistor Indicates Underrange
• Read Only. Write Will NACK
• 0 – Charger Not Alarm Inhibited
• 1 – Charger Alarm Inhibited. This Bit Is Set but Never Cleared by
AlarmWarning()
• Read Only. Write Will NACK
• Cleared to Power-On Reset Value When:
1) POR_RESET = 1
2) BATTERY_PRESENT = 0
3) AC_PRESENT = 0
4) A Valid ChargingVoltage(), ChargingCurrent() Pair Is Received
• 0 – VBAT/VDCIN < 0.9
• 1 – VBAT/VDCIN > 0.9
• Read Only. Write Will NACK
• 0 – Battery Is Not Present
• 1 – Battery Is Present
• Read Only. Write Will NACK
• 0 – Charge Power Is Not Available
• 1 – Charge Power Is Available
• Read Only. Write Will NACK
• Unsigned Integer Representing Charger Current in mA
• Three Possible Responses
– Supply the Current Requested
– Supply Its Programmatic Maximum Current If the Request Is
Greater Than Its Programmatic Value and Less Than hffff
– Supply Its Maximum Safe Current If the Request Is hffff [Supply
Current Required to Meet ChargingVoltage()].
• Write Only. Read Will NACK
• Unsigned Integer Representing Charger Voltage in mV
• Three Possible Responses
– Supply the Voltage Requested
– Supply Its Programmatic Maximum Voltage If the Request Is
Greater Than Its Programmatic Value and Less Than hffff
– Supply Its Maximum Voltage If the Request Is hffff [Supply
Voltage Required to Meet ChargingCurrent()].
• Write Only. Read Will NACK
• 1 – Terminate Charging Immediately
• Write Only. Read Will NACK
• Writing a 0 to This Bit Will Be Ignored
• 1 – Terminate Charging Immediately
• Write Only. Read Will NACK
• Writing a 0 to This Bit Will Be Ignored.
• 1 – Terminate Charging Immediately
• Write Only. Read Will NACK
• Writing a 0 to This Bit Will Be Ignored.
• 1 – Terminate Charging Immediately
• Write Only. Read Will NACK
• Writing a 0 to This Bit Will Be Ignored.
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