DS2764 High-Precision Li+ Battery Monitor With 2-Wire Interface

6 of 20

PIN DESCRIPTION

PIN

TSSOP

FLIP

CHIP

SYMBOL

FUNCTION

1

C1

CC

Charge Protection Control Output. Controls an external P-channel high-side charge

protection FET.

2

B1

PLS

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

reliable detection of a valid charge source. For details of other internal connections to

PLS and associated conditions see the Li+ Protection Circuitry section.

3

B2

DC

Discharge Protection Control Output. Controls an external P-channel high-side

discharge protection FET.

4, 5, 6

A3

SNS

Sense Resistor Connection. Connect to the negative terminal of the battery pack. In

and SNS.

7

B4

PS

Power Switch Sense Input. The device wakes up from sleep mode when it senses the

8

C4

IS2

Current-Sense Input. This pin is internally connected to SNS through a 4.7k

W resistor.

9

D4

IS1

W resistor.

Connect a 0.1

mF capacitor between IS1 and IS2 to complete a low pass input filter.

10

E4

SDA

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 1

mA pulldown for sensing

disconnection.

11, 12, 13

F3

Device Ground. Connect directly to the negative terminal of the Li+ cell. For the external

14

E2

SCL

Serial Clock Input. 2-Wire clock line. Input only. Connect this pin to the CLOCK

terminal of the battery pack. Pin has an internal 1

mA pulldown for sensing disconnection.

15

E1

Power-Supply Input. Connect to the positive terminal of the Li+ cell through a

decoupling network.

16

D1

Voltage Sense Input. The voltage of the Li+ cell is monitored through this input pin. This

—

C2

SNS

Probe

Do not connect.

—

D2

Probe

Do not connect.