Datasheet

MAX1667
Chemistry-Independent,
Level 2 Smart Battery Charger
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Table 8. ChargerStatus() Bit Descriptions
DESCRIPTION
0 = Ready to charge a smart battery
1 = Charger is off; IOUT current = 0mA; DLO = PGND; DHI = LX
0 = VL voltage < 4V
1 = VL voltage > 4V
Always returns ‘0’
0 = THM voltage > 5% of REF voltage
1 = THM voltage < 5% of REF voltage
No11
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()
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.
LATCHED?
Yes
No
N/A
BIT
POSITION
0
15
1
AC_PRESENT
0 = No battery is present (THERMISTOR_OR = 1).
1 = A battery is present (THERMISTOR_OR = 0).
Yes
No14
12
BATTERY_PRESENT
0 = BATT voltage < 89% of DCIN voltage
1 = BATT voltage > 89% of DCIN voltage
ALARM_INHIBITED
No13
THERMISTOR_UR
Always returns 0
0 = ChargingCurrent() value is valid for MAX1667.
1 = ChargingCurrent() value exceeds what MAX1667 can actually deliver.
0 = ChargingVoltage() value is valid for MAX1667.
1 = ChargingVoltage() value exceeds what MAX1667 can actually deliver.
N/A
No
No
5
6
7
0 = THM voltage < 91% of REF voltage
1 = THM voltage > 91% of REF voltage
0 = THM voltage < 75% of REF voltage
1 = THM voltage > 75% of REF voltage
This bit reports the state of an internal SR flip-flop (denoted THERMISTOR_HOT
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.
No
No
Yes
8
9
10
THERMISTOR_OR
THERMISTOR_COLD
THERMISTOR_HOT
LEVEL_3
CURRENT_OR
VOLTAGE_OR
POWER_FAIL
0 = BATT voltage is limited at the voltage set point (BATT = V0).
1 = BATT voltage is less than the voltage set point (BATT < V0).
Always returns 1
0 = Current through R1 is at its limit (I
BATT
= I0).
1 = Current through R1 is less than its limit (I
BATT
< I0).
No
N/A
No
2
4
3
VOLTAGE_NOTREG
LEVEL_2
NAME
CHARGE_INHIBITED
CURRENT_NOTREG
MASTER_MODE
*Bit position in the D15–D0 data
N/A = Not applicable