MAX1667 Datasheet, PDF (23/28 Pages) Maxim Integrated Products – Chemistry-Independent, Level 2 Smart Battery Charger

Chemistry-Independent,
Level 2 Smart Battery Charger
Table 8. ChargerStatus() Bit Descriptions
NAME
CHARGE_INHIBITED
MASTER_MODE
VOLTAGE_NOTREG
CURRENT_NOTREG
LEVEL_2
LEVEL_3
CURRENT_OR
VOLTAGE_OR
THERMISTOR_OR
THERMISTOR_COLD
BIT
POSITION
LATCHED?
DESCRIPTION
0
Yes
0 = Ready to charge a smart battery
1 = Charger is off; IOUT current = 0mA; DLO = PGND; DHI = LX
1
N/A
Always returns ‘0’
2
No
0 = BATT voltage is limited at the voltage set point (BATT = V0).
1 = BATT voltage is less than the voltage set point (BATT < V0).
3
No
0 = Current through R1 is at its limit (I_BATT = I0).
1 = Current through R1 is less than its limit (I_BATT < I0).
4
N/A
Always returns 1
5
N/A
Always returns 0
6
No
0 = ChargingCurrent() value is valid for MAX1667.
1 = ChargingCurrent() value exceeds what MAX1667 can actually deliver.
7
No
0 = ChargingVoltage() value is valid for MAX1667.
1 = ChargingVoltage() value exceeds what MAX1667 can actually deliver.
8
No
0 = THM voltage < 91% of REF voltage
1 = THM voltage > 91% of REF voltage
9
No
0 = THM voltage < 75% of REF voltage
1 = THM voltage > 75% of REF voltage
THERMISTOR_HOT
10
This bit reports the state of an internal SR flip-flop (denoted THERMISTOR_HOT
Yes
flip-flop). The THERMISTOR_HOT flip-flop is set whenever THM is below 23%
of REF. It is cleared whenever BATTERY_PRESENT = 0 or ChargerMode() is
written with POR_RESET = 1.
THERMISTOR_UR
11
No
0 = THM voltage > 5% of REF voltage
1 = THM voltage < 5% of REF voltage
ALARM_INHIBITED
12
This bit reports the state of an internal SR flip-flop (denoted ALARM_INHIBITED
flip-flop). The ALARM_INHIBITED flip-flop is set whenever the AlarmWarning()
Yes
command is written with D15, D14, or D12 set. The ALARM_INHIBITED flip-flop
is cleared whenever BATTERY_PRESENT = 0, or ChargerMode() is written with
POR_RESET = 1, or ChargingVoltage() or ChargingCurrent() is written.
POWER_FAIL
13
BATTERY_PRESENT
14
AC_PRESENT
15
*Bit position in the D15–D0 data
N/A = Not applicable
No
0 = BATT voltage < 89% of DCIN voltage
1 = BATT voltage > 89% of DCIN voltage
No
0 = No battery is present (THERMISTOR_OR = 1).
1 = A battery is present (THERMISTOR_OR = 0).
No
0 = VL voltage < 4V
1 = VL voltage > 4V
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