x3102v28 Intersil Corporation, x3102v28 Datasheet - Page 15

• Manufacturer Part Number: x3102v28
• Description: 3 Cell Li-ion Battery Protection And Monitor Ic
• Manufacturer: Intersil Corporation

Configuration Register
The X3102 can be configured for specific user requirements
using the Configuration Register.
Over-Charge Voltage Settings
VOV1 and VOV0 control the cell over-charge level. See
section “Over-charge Protection” on page 19.
TABLE 4. OVER-CHARGE VOLTAGE THRESHOLD SELECTION
Default = 03H
Default = 40H
VOV1
CONFIGURATION REGISTER BITS
10–11
12–13
14–15
BIT(s)
CELLN
15
0-5
8-9
TABLE 1. CONFIGURATION REGISTER FUNCTIONALITY
6
7
TABLE 3. CONFIGURATION REGISTER - LOWER BYTE
TABLE 2. CONFIGURATION REGISTER - UPPER BYTE
7
VOV1
0
0
1
1
VOV0
14
VOC1–VOC0
VUV1–VUV0
VOV1–VOV0
VCE1–VCE0
SWCEN
SWCEN
CELLN
NAME
VUV1
6
–
13
VOV0
VUV0
5
12
x
0
1
0
1
(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 over-discharge (under voltage)
threshold
Select over-charge voltage threshold
15
VOC1 VOC0
4
x
11
V
V
V
V
OV
OV
OV
OV
FUNCTION
3
x
= 4.20V (Default)
= 4.25V
= 4.30V
= 4.35V
10
OPERATION
2
x
VCE1
9
1
x
VCE0
8
0
x
X3102
Over-Discharge Settings
VUV1 and VUV0 control the cell over-discharge (under
voltage threshold) level. See section “Over-discharge
Protection” on page 20.
Overcurrent Settings
VOC1 and VOC0 control the pack overcurrent level. See
section “Overcurrent Protection” on page 23.
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 20.
CONFIGURATION REGISTER BITS
CONFIGURATION REGISTER BITS
TABLE 5. OVER-DISCHARGE THRESHOLD SELECTION
CONFIGURATION
TABLE 8. CELL CHARGING THRESHOLD VOLTAGE
REGISTER BIT
VUV1
TABLE 6. OVERCURRENT THRESHOLD VOLTAGE
VOC1
VCE1
0
0
1
1
0
0
1
1
CONFIGURATION
TABLE 7. CELL CHARGE ENABLE FUNCTION
REGISTER BITS
SWCEN
0
0
1
1
0
1
VUV0
VOC0
SELECTION.
SELECTION.
0
1
0
1
0
1
0
1
VCE0
Charge enable function: ON
Charge enable function: OFF
0
1
0
1
V
OPERATION
OC
V
V
V
V
CE
CE
CE
CE
OPERATION
V
V
V
V
V
V
V
OPERATION
= 0.075V (Default)
OC
OC
OC
UV
UV
UV
UV
= 0.5V
= 0.80V
= 1.10V
= 1.40V (Default)
(default)
OPERATION
= 2.25V
= 2.35V
= 2.45V
= 2.55V
= 0.100V
= 0.125V
= 0.150V
December 22, 2004
FN8246.0