X3102 Datasheet, PDF (15/32 Pages) Intersil Corporation – 3 Cell Li-Ion Battery Protection and Monitor IC

X3102
Configuration Register
The X3102 can be configured for specific user requirements
using the Configuration Register.
TABLE 1. CONFIGURATION REGISTER FUNCTIONALITY
BIT(s)
NAME
FUNCTION
0-5
–
(don’t care)
6
SWCEN Switch Cell Charge Enable threshold
function ON/OFF
7
CELLN
Set the number of Li-Ion
battery cells used (3 or 4)
8-9
VCE1–VCE0 Select Cell Charge Enable threshold
10–11 VOC1–VOC0 Select overcurrent threshold
12–13
VUV1–VUV0 Select over-discharge (under voltage)
threshold
14–15 VOV1–VOV0 Select over-charge voltage threshold
TABLE 2. CONFIGURATION REGISTER - UPPER BYTE
15
14
13
12
11
10
9
8
VOV1 VOV0 VUV1 VUV0 VOC1 VOC0 VCE1 VCE0
Default = 03H
TABLE 3. CONFIGURATION REGISTER - LOWER BYTE
7
6
5
4
3
2
1
0
CELLN SWCEN x
x
x
x
x
x
Default = 40H
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
CONFIGURATION REGISTER BITS
VOV1
VOV0
OPERATION
0
0
V_OV = 4.20V (Default)
0
1
V_OV = 4.25V
1
0
V_OV = 4.30V
1
1
V_OV = 4.35V
Over-Discharge Settings
VUV1 and VUV0 control the cell over-discharge (under
voltage threshold) level. See section “Over-discharge
Protection” on page 20.
TABLE 5. OVER-DISCHARGE THRESHOLD SELECTION
CONFIGURATION
REGISTER BITS
VUV1
VUV0
OPERATION
0
0
V_UV = 2.25V
(default)
0
1
V_UV = 2.35V
1
0
V_UV = 2.45V
1
1
V_UV = 2.55V
Overcurrent Settings
VOC1 and VOC0 control the pack overcurrent level. See
section “Overcurrent Protection” on page 23.
TABLE 6. OVERCURRENT THRESHOLD VOLTAGE
SELECTION.
CONFIGURATION REGISTER BITS
VOC1
VOC0
OPERATION
0
0
V_OC = 0.075V (Default)
0
1
V_OC = 0.100V
1
0
V_OC = 0.125V
1
1
V_OC = 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 20.
TABLE 7. CELL CHARGE ENABLE FUNCTION
CONFIGURATION
REGISTER BIT
SWCEN
OPERATION
0
Charge enable function: ON
1
Charge enable function: OFF
TABLE 8. CELL CHARGING THRESHOLD VOLTAGE
SELECTION.
CONFIGURATION REGISTER BITS
VCE1
VCE0
OPERATION
0
0
V_CE = 0.5V
0
1
V_CE = 0.80V
1
0
V_CE = 1.10V
1
1
V_CE = 1.40V (Default)
15
FN8246.0
December 22, 2004