MAX1535 Maxim Integrated Products, MAX1535 Datasheet - Page 25

• Manufacturer Part Number: MAX1535
• Description: Highly Integrated Level 2 Smbus Battery Charger
• Manufacturer: Maxim Integrated Products

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Table 10 summarizes the conditions for setting the ther-
mistor bits and how these 4 bits affect the charging sta-
tus when a 10kΩ pullup resistor is connected between
V
• THERMISTOR_OR bit is set when the thermistor
• THERMISTOR_COLD bit is set when the thermistor
• THERMISTOR_HOT bit is set when the thermistor
• THERMISTOR_UR bit is set when the thermistor
Table 8. AlarmWarning()
Command: 0x16
DD
value is greater than 100kΩ. This indicates that the
thermistor is open or a battery is not present. The
charger is set to POR, and the BATTERY_PRESENT
bit is cleared.
value is greater than 30kΩ. The thermistor indicates
a cold battery. This bit does not affect charging.
value is less than 3kΩ. This is a latched bit and is
cleared by removing the battery or sending a POR
with the ChargerMode() command. The charger is ter-
minated unless the HOT_STOP bit is cleared in the
ChargerMode() command or the THERMISTOR_UR
bit is set. See Tables 4 and 10.
value is less than 500Ω (i.e., THM is grounded).
and THM:
BIT
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
TERMINATE_DISCHARGE_ALARM Not used
REMAINING_CAPACITY_ALARM
TERMINATE_CHARGE_ALARM
______________________________________________________________________________________
REMAINING_TIME_ALARM
OVER_CHARGE_ALARM
FULLY_DISCHARGED
OVER_TEMP_ALARM
FULLY_CHARGED
OTHER_ALARM
DISCHARGING
INITIALIZING
BIT NAME
Error Code
Error Code
Error Code
Error Code
Reserved
Thermistor Bits
Highly Integrated Level 2 SMBus
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
0 = Charge normally.
1 = Terminate charging.
0 = Charge normally.
1 = Terminate charging.
0 = Charge normally.
1 = Terminate charging.
0 = Charge normally.
1 = Terminate charging.
Figure 8. InputCurrent() Code to Input Current-Limit Mapping
11008
8192
4096
256
0x080
DESCRIPTION
Battery Charger
0x0800
INPUTCURRENT() CODE
0x1000
0x1580
0xFFFF
25