MAX8731 Maxim Integrated Products, MAX8731 Datasheet - Page 16

• Manufacturer Part Number: MAX8731
• Description: SMBus Level 2 Battery Charger
• Manufacturer: Maxim Integrated Products

SMBus Level 2 Battery Charger with
Remote Sense
To set the output voltage, use the SMBus to write a 16-
bit ChargeVoltage() command using the data format
listed in Table 1. The ChargeVoltage() command uses
the Write-Word protocol (see Figure 3). The command
code for ChargeVoltage() is 0x15 (0b00010101). The
MAX8731 provides a 1.024V to 19.200V charge voltage
Table 1. ChargeVoltage () (0x15)
16
______________________________________________________________________________________
BIT
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
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
Charge voltage, DACV 10
Setting Charge Voltage
BIT NAME
—
—
—
—
—
Not used. Normally a 1mV weight.
Not used. Normally a 2mV weight.
Not used. Normally a 4mV weight.
Not used. Normally a 8mV weight.
0 = Adds 0mV of charger voltage compliance, 1024mV min.
1 = Adds 16mV of charger voltage compliance.
0 = Adds 0mV of charger voltage compliance, 1024mV min.
1 = Adds 32mV of charger voltage compliance.
0 = Adds 0mV of charger voltage compliance, 1024mV min.
1 = Adds 64mV of charger voltage compliance.
0 = Adds 0mV of charger voltage compliance, 1024mV min.
1 = Adds 128mV of charger voltage compliance.
0 = Adds 0mV of charger voltage compliance, 1024mV min.
1 = Adds 256mV of charger voltage compliance.
0 = Adds 0mV of charger voltage compliance, 1024mV min.
1 = Adds 512mV of charger voltage compliance.
0 = Adds 0mA of charger voltage compliance.
1 = Adds 1024mV of charger voltage compliance.
0 = Adds 0mV of charger voltage compliance.
1 = Adds 2048mV of charger voltage compliance.
0 = Adds 0mV of charger voltage compliance.
1 = Adds 4096mV of charger voltage compliance.
0 = Adds 0mV of charger voltage compliance.
1 = Adds 8192mV of charger voltage compliance.
0 = Adds 0mV of charger voltage compliance.
1 = Adds 16,384mV of charger voltage compliance, 19,200mV max.
Not used. Normally a 32,768mV weight.
range, with 16mV resolution. Set ChargeVoltage()
below 1.024V to terminate charging. Upon reset, the
ChargeVoltage() and ChargeCurrent() values are
cleared and the charger remains off until both the
ChargeVoltage() and the ChargeCurrent() command
are sent. Both DHI and DLO remain low until the charg-
er is restarted.
DESCRIPTION