MAX1645 Datasheet, PDF (19/32 Pages) Maxim Integrated Products – Advanced Chemistry-Independent, Level 2 Battery Chargers with Input Current Limiting

Advanced Chemistry-Independent, Level 2
Battery Chargers with Input Current Limiting
Table 3. ChargerStatus()
BIT
NAME
0
CHARGE_INHIBITED
1
MASTER_MODE
2
VOLTAGE_NOT_REG
3
CURRENT_NOT_REG
4
LEVEL_2
5
LEVEL_3
6
CURRENT_OR
7
VOLTAGE_OR
8
THERMISTOR_OR
9
THERMISTOR_COLD
10
THERMISTOR_HOT
11
THERMISTOR_UR
12
ALARM_INHIBITED
13
POWER_FAIL
14
BATTERY_PRESENT
15
AC_PRESENT
Command: 0x13
*State at chip initial power-on.
FUNCTION
0* = Ready to charge Smart Battery.
1 = Charger is inhibited, I(chg) = 0mA.
This status bit returns the value of the CHG_INHIBITED flip-flop.
Always returns “0”
0 = Battery voltage is limited at the set point.
1 = Battery voltage is less than the set point.
0 = Battery current is limited at the set point.
1 = Battery current is less than the set point.
Always returns a “1”
Always returns a “0”
0* = The ChargingCurrent() value is valid for the MAX1645.
1 = The ChargingCurrent() value exceeds the MAX1645 output range, i.e.,
programmed ChargingCurrent() exceeds 3008mA.
0 = The ChargingVoltage() value is valid for the MAX1645.
1* = The ChargingVoltage() value exceeds the MAX1645 output range, i.e.,
programmed ChargingVoltage() exceeds 1843mV.
0 = THM is < 91% of the reference voltage.
1 = THM is > 91% of the reference voltage.
0 = THM is < 75.5% of the reference voltage.
1 = THM is > 75.5% of the reference voltage.
0 = THM has not dropped to < 23.5% of the reference voltage.
1 = THM has dropped to < 23.5% of the reference voltage.
THERMISTOR_HOT flip-flop cleared by BATTERY_PRESENT = 0 or writing a “1” into
the POR_RESET bit in the ChargerMode() command.
0 = THM is > 7.5% of the reference voltage.
1 = THM is < 7.5% of the reference voltage.
Returns the state of the ALARM_INHIBITED flip-flop. This flip-flop is set by either a
watchdog timeout or by writing an AlarmWarning() command with bits 11, 12, 13, 14,
or 15 set. This flip-flop is cleared by BATTERY_PRESENT = 0, writing a “1” into the
POR_RESET bit in the ChargerMode() command, or by receiving successive
ChargingVoltage() and ChargingCurrent() commands. POR: 0.
0 = The charging source voltage CVS is above the BATT voltage.
1 = The charging source voltage CVS is below the BATT voltage.
0 = No battery is present (based on THM input).
1 = Battery is present (based on THM input).
0 = DCIN is below the 7.5V undervoltage threshold.
1 = DCIN is above the 7.5V undervoltage threshold.
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