MAX1535 Maxim Integrated Products, MAX1535 Datasheet - Page 24

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

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Highly Integrated Level 2 SMBus
Battery Charger
Table 7. ChargeVoltage()
Command: 0x15
The MAX1535 includes a timer that terminates charging
if the charger has not received a ChargeVoltage() or
ChargeCurrent() command in 175s. During charging,
the timer is reset each time a ChargeVoltage() or
ChargeCurrent() command is received; this ensures
that the charging cycle is not terminated.
Four thermistor comparators evaluate the voltage at the
THM input to determine the battery temperature. This
input is meant to be used with the internal thermistor
connected to ground inside the battery pack. Connect
the output of the battery thermistor to THM. Connect a
pullup resistor from THM to V
divider sets the voltage at THM.
24
______________________________________________________________________________________
BIT
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
Charge Voltage, DACV 10
Charge Voltage, DACV 0
Charge Voltage, DACV 1
Charge Voltage, DACV 2
Charge Voltage, DACV 3
Charge Voltage, DACV 4
Charge Voltage, DACV 5
Charge Voltage, DACV 6
Charge Voltage, DACV 7
Charge Voltage, DACV 8
Charge Voltage, DACV 9
Thermistor Comparators
BIT NAME
—
—
—
—
—
DD
. The resistive voltage-
Charger Timeout
Not used. Normally a 1mV weight.
Not used. Normally a 2mV weight.
Not used. Normally a 4mV weight.
Not used. Normally an 8mV weight.
0 = Adds 0mV of charge-voltage compliance, 1024mV min.
1 = Adds 16mV of charge-voltage compliance.
0 = Adds 0mV of charge-voltage compliance, 1024mV min.
1 = Adds 32mV of charge-voltage compliance.
0 = Adds 0mV of charge-voltage compliance, 1024mV min.
1 = Adds 64mV of charge-voltage compliance.
0 = Adds 0mV of charge-voltage compliance, 1024mV min.
1 = Adds 128mV of charge-voltage compliance.
0 = Adds 0mV of charge-voltage compliance, 1024mV min.
1 = Adds 256mV of charge-voltage compliance.
0 = Adds 0mV of charge-voltage compliance, 1024mV min.
1 = Adds 512mV of charge-voltage compliance.
0 = Adds 0mV of charge-voltage compliance.
1 = Adds 1024mV of charge-voltage compliance.
0 = Adds 0mV of charge-voltage compliance.
1 = Adds 2048mV of charge-voltage compliance.
0 = Adds 0mV of charge-voltage compliance.
1 = Adds 4096mV of charge-voltage compliance.
0 = Adds 0mV of charge-voltage compliance.
1 = Adds 8192mV of charge-voltage compliance.
0 = Adds 0mV of charge-voltage compliance.
1 = Adds 16384mV of charge-voltage compliance, 19200mV max.
Not used. Normally a 32768mV weight.
Figure 7. ChargeVoltage() Code to Charge-Voltage Set Point
Mapping
19200
16800
8400
4200
1024
DESCRIPTION
0x0400
0x1060
CHARGEVOLTAGE() CODE
0x20D0
0x41A0
0x4B00
0xFFFF