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| 型号： | FAN5201MSA |
| 英文描述： | Battery Management |
| 中文描述： | 电池管理 |
| 文件页数： | 14/20页 |
| 文件大小： | 123K |
| 代理商： | FAN5201MSA |
FAN5201
14
P
SMBus Interface Specification
The FAN5201 is designed to fit in a system whose center is a
microcontroller acting as an SMBus host. The host receives
charging requests and other signals from a Smart Battery,
and sends charging requests to the FAN5201 charger, in the
process providing the necessary translations. The FAN5201
acts as a slave only. There is no direct communication
between the charger and the battery. Note that the FAN5201
is NOT intended to be fully compliant with the Intel/Dura-
cell Smart Battery System Specification. This document
specifies ALL of the FAN5201’s SMBus interface.
Slave Address
0001001b
Power On
The FAN5201 powers on with all DACs set to zero. All
DACs must be written to before charging can begin. At
power on, the Zero Current Bit is 0.
Supported Communications—Write Section
(μC to IC)
Charging Current
The host sends the desired charging rate in mA.
￥ SMBus Protocol: Write Word
￥ Command Code: 0x14
Figure 7. Charging Current Input and Output Word
For example, 0x0200 sets a charge current of 512mA by out-
putting (16/255) * FS, where FS = 8160mA.
Charging Voltage
The host sends the desired charging voltage in mV with an
offset of 10V.
￥ SMBus Protocol: Write Word
￥ Command Code: 0x15
Figure 8. Charging Voltage Input and Output Word
For example, 0x0200 sets a charging voltage of 10.512V by
outputting (16/255) * FS +10V, where FS = 8.160V.
Charging Power
The host sends the maximum power available from the AC
adapter in 5W increments with an offset of 25W.
￥ SMBus Protocol: Write Word
￥ Command Code: 0x17
Figure 9. Charging Power Input and Output Word
For example, 0x0005 sets maximum charge power at 50W
by outputting (5/15) * FS +25W, where FS = 75W.
Control Signals
The host sends a signal to set the IC into power down mode,
and to reset the zero current flag.
When Power Down is sent to the IC, only the 5V linear regu-
lator and the SMBus are on, all other systems are turned off.
Table 2. Charging Current Input and Output
Input
Unsigned 2-Byte
Units
LSB
MSB
Output
Scale
Resolution
Desired Charging Current
mA
Bit 5
Bit 12
255 Steps (from 0 to full-scale)
32mA (with 18m
sense resistor)
X
X
X
X
X
X
X
X
MSB
LSB
15
14
13
2
1
4
3
0
8
7
10
11
9
6
12
5
Table 3. Charging Voltage Input and Output
Input
Unsigned 2-Byte
Units
LSB
MSB
Output
Scale
Resolution
Desired Charging Voltage
mV
Bit 5
Bit 12
255 Steps (from 0 to full-scale)
32mV
Table 4. Charging Power Input and Output
Input
Unsigned 2-Byte
Units
LSB
MSB
Output
Scale
Resolution
Maximum Charging Power
5W
Bit 0
Bit 3
15 Steps (from 0 to full-scale)
5W (with 18m
sense resistor)
X
X
X
X
X
X
X
X
MSB
LSB
15
14
13
2
1
4
3
0
8
7
10
11
9
6
12
5
X
X
X
X
X
X
X
X
X
X
X
X
MSB
LSB
15
14
13
2
1
4
3
0
8
7
10
11
9
6
12
5
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