x3102v28 Intersil Corporation, x3102v28 Datasheet - Page 2

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

Functional Diagram
Pin Names
PIN
10
11
12
13
14
1
2
3
4
5
6
7
8
9
VCELL1
VCELL2
VCELL3
SYMBOL
VCELL1
VCELL2
VCELL3
CB1
CB2
CB3
VSS
VCS1
VCS2
OVT
OCT
CB1
CB2
CB3
VSS
VSS
UVT
NC
NC
Battery cell 1 voltage input. This pin is used to monitor the voltage of this battery cell internally. The voltage of an individual
cell can also be monitored externally at pin AO.
The X3102 monitors 3 battery cells.
Cell balancing FET control output 1. This output is used to switch an external FET in order to perform cell voltage balancing
control. This function can be used to adjust an individual cell voltage (e.g., during cell charging). CB1 can be driven high (Vcc)
or low (Vss) to switch the external FET ON/OFF.
Battery cell 2 voltage. This pin is used to monitor the voltage of this battery cell internally. The voltage of an individual cell can
also be monitored externally at pin AO.
The X3102 monitors 3 battery cells.
Cell balancing FET control output 2. This output is used to switch an external FET in order to perform cell voltage balancing
control. This function can be used to adjust individual cell voltages (e.g., during cell charging). CB2 can be driven high (Vcc) or
low (Vss) to switch the external FET ON/OFF.
Battery cell 3 voltage. This pin is used to monitor the voltage of each battery cell internally. The voltage of an individual cell
can also be monitored externally at pin AO.
The X3102 monitors 3 battery cells.
Cell balancing FET control output 3. This output is used to switch an external FET in order to perform cell voltage balancing
control. This function can be used to adjust an individual cell voltage (e.g., during cell charging). CB3 can be driven high (Vcc)
or low (Vss) to switch the external FET ON/OFF.
Ground.
No Connect.
Ground.
Current sense voltage pin 1. A sense resistor (R
resistance in the order of 20m: to 100m:, and is used to monitor current flowing through the battery terminals, and protect
against overcurrent conditions. The voltage at each end of R
Current sense voltage pin 2. A sense resistor (R
resistance in the order of 20m: to 100m:, and is used to monitor current flowing through the battery terminals, and protect
against overcurrent conditions. The voltage at each end of R
Over-charge detect/release time input. This pin is used to control the delay time (T
over-charge condition (See section “Over-charge Protection” on page 19).
Over-discharge detect/release time input. This pin is used to control the delay times associated with the detection (T
release (T
Overcurrent detect/release time input. This pin is used to control the delay times associated with the detection (T
release (T
Over-discharge
Over-charge
Protection
Circuits
Sense
VSS
UVR
OCR
2
) of an over-discharge (undervoltage) condition (See section “Over-discharge Protection” on page 20).
) of an overcurrent condition (See section “Overcurrent Protection” on page 23).
VCS1
Current Sense
Protection &
Overcurrent
Sample Rate
Protection
Timer
VCS2
VCC
OVT
Protection Circuit
& Configuration
Internal Voltage Regulator
Timing Control
RGP
UVT
Power-On reset &
Status Register
Regulator
X3102
5VDC
RGC
OCT
SENSE
SENSE
DESCRIPTION
RGO
) is connected between VCS1 and VCS2 (Figure 1). R
) is connected between VCS1 and VCS2 (Figure 1). R
SENSE
SENSE
Configuration
can also be monitored at pin AO.
can also be monitored at pin AO.
UVP/OCP
Register
FET Control
Circuitry
OVP/LMON
OV
EEPROM
) associated with the detection of an
Register
Control
4 kbit
Analog
MUX
SPI
I/F
December 22, 2004
SENSE
SENSE
OC
UV
AS0
AS1
AS2
AO
S0
SCK
CS
SI
FN8246.0
) and
has a
has a
) and