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X3100-01 Datasheet, PDF (9/41 Pages) Intersil Corporation – Cell Balancing Control
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X3100, X3101
Configuration Register
The X3100 and X3101 can be configured for specific user
requirements using the Configuration Register.
TABLE 1. CONFIGURATION REGISTER FUNCTIONALITY
BIT(s)
0 to 5
6
7
8 to 9
10 to11
12 to 13
14 to 15
NAME
–
SWCEN
CELLN
VCE1-VCE0
VOC1-VOC0
VUV1-VUV0
VOV1-VOV0
FUNCTION
(don’t care)
Switch Cell Charge Enable threshold
function ON/OFF
Set the number of Li-ion battery cells
used (3 or 4)
Select Cell Charge Enable threshold
Select overcurrent threshold
Select overdischarge (under voltage)
threshold
Select overcharge voltage threshold
TABLE 2. CONFIGURATION REGISTER—UPPER BYTE
15
14
13
12
11
10
9
8
VOV1 VOV0 VUV1 VUV0 VOC1 VOC0 VCE1 VCE0
X3100 Default = 33H; X3101 Default = 03H.
TABLE 3. CONFIGURATION REGISTER—LOWER BYTE
7
6
5
4
3
2
1
0
CELLN SWCEN x
x
x
x
x
x
X3100 Default = C0H; X3101 Default = 40H.
Overcharge Voltage Settings
VOV1 and VOV0 control the cell over-charge level. See
section “Over-charge Protection” on page 14.
TABLE 4. OVERCHARGE VOLTAGE THRESHOLD SELECTION
CONFIGURATION REGISTER
BITS
VOV1
VOV0
0
0
0
1
1
0
1
1
OPERATION (V)
VOV = 4.20 (Default)
VOV = 4.25
VOV = 4.30
VOV = 4.35
Overdischarge Settings
VUV1 and VUV0 control the cell over-discharge (under
voltage threshold) level. See section “Over-discharge
Protection” on page 16.
TABLE 5. OVERDISCHARGE THRESHOLD SELECTION.
CONFIGURATION
REGISTER BITS
VUV1
VUV0
0
0
0
1
1
0
1
1
OPERATION
X3100
X3101
VUV = 1.95V
VUV = 2.25V
(X3101 default)
VUV = 2.05V
VUV = 2.15V
VUV = 2.25V
(X3100 default)
VUV = 2.35V
VUV = 2.45V
VUV = 2.55V
Overcurrent Settings
VOC1 and VOC0 control the pack over-current level. See
section “Over-Current Protection” on page 19.
TABLE 6. OVERCURRENT THRESHOLD VOLTAGE SELECTION
CONFIGURATION REGISTER
BITS
VOC1
VOC0
0
0
0
1
1
0
1
1
OPERATION
VOC = 0.075V (Default)
VOC = 0.100V
VOC = 0.125V
VOC = 0.150V
Cell Charge Enable Settings
VCE1, VCE0 and SWCEN control the pack charge enable
function. SWCEN enables or disables a circuit that prevents
charging if the cells are at too low a voltage. VCE1 and VCE0
select the voltage that is recognized as too low. See section
“Sleep Mode” on page 16.
TABLE 7. CELL CHARGE ENABLE FUNCTION
CONFIGURATION
REGISTER BITS
SWCEN
0
1
OPERATION
Charge enable function: ON
Charge enable function: OFF
TABLE 8. CELL CHARGING THRESHOLD VOLTAGE
SELECTION
CONFIGURATION REGISTER
BITS
VCE1
VCE0
0
0
0
1
1
0
1
1
OPERATION
VCE = 0.5V
VCE = 0.80V
VCE = 1.10V
VCE = 1.40V (Default)
9
FN8110.1
January 3, 2008
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