DS2764 MAXIM [Maxim Integrated Products], DS2764 Datasheet - Page 6

• Manufacturer Part Number: DS2764
• Description: High-Precision Li+ Battery Monitor with 2-Wire Interface
• Manufacturer: MAXIM [Maxim Integrated Products]

PIN DESCRIPTION
11, 12, 13
TSSOP
4, 5, 6
10
14
15
16
—
—
1
2
3
7
8
9
PIN
CHIP
FLIP
C1
C4
D4
D1
C2
D2
B1
B2
A3
B4
E4
F3
E2
E1
SYMBOL
Probe
Probe
SNS
SDA
SCL
SNS
PLS
V
CC
DC
IS2
IS1
V
V
V
PS
SS
DD
SS
IN
Charge Protection Control Output. Controls an external P-channel high-side charge
protection FET.
Battery Pack Positive Terminal Input. The DS2764 monitors the pack plus terminal
through PLS to detect overload and short circuit removal, as well as the presence or
removal of a charge source. Additionally, a charge path to recover a deeply depleted cell
is provided from PLS to V
connected to PLS is discharged internally to V
reliable detection of a valid charge source. For details of other internal connections to
PLS and associated conditions see the Li+ Protection Circuitry section.
Discharge Protection Control Output. Controls an external P-channel high-side
discharge protection FET.
Sense Resistor Connection. Connect to the negative terminal of the battery pack. In
the internal sense resistor configuration, the sense resistor is connected between V
and SNS.
Power Switch Sense Input. The device wakes up from sleep mode when it senses the
closure of a switch to V
Current-Sense Input. This pin is internally connected to SNS through a 4.7kW resistor.
Current-Sense Input. This pin is internally connected to V
Connect a 0.1mF capacitor between IS1 and IS2 to complete a low pass input filter.
Serial Data Input/Out. 2-Wire data line. Open-drain output driver. Connect this pin to
the DATA terminal of the battery pack. Pin has an internal 1mA pulldown for sensing
disconnection.
Device Ground. Connect directly to the negative terminal of the Li+ cell. For the external
sense resistor configuration, connect the sense resistor between V
Serial Clock Input. 2-Wire clock line. Input only. Connect this pin to the CLOCK
terminal of the battery pack. Pin has an internal 1mA pulldown for sensing disconnection.
Power-Supply Input. Connect to the positive terminal of the Li+ cell through a
decoupling network.
Voltage Sense Input. The voltage of the Li+ cell is monitored through this input pin. This
pin has a weak pull-up to V
Do not connect.
Do not connect.
6 of 20
SS
DD
on this pin. Pin has an internal 1mA pull-up to V
DD
. In sleep mode, any capacitance or voltage source
.
FUNCTION
SS
through 200µA (nominal) to assure
SS
through a 4.7kW resistor.
SS
and SNS.
DD
.
SS