DS2764 데이터 시트보기 (PDF) - Maxim Integrated

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DS2764

High-Precision Li+ Battery Monitor with 2-Wire Interface

Maxim Integrated 

PIN DESCRIPTION

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

PIN

TSSOP

FLIP

CHIP

SYMBOL

FUNCTION

1

C1

CC

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

2

B1

PLS is provided from PLS to VDD. In sleep mode, any capacitance or voltage source

connected to PLS is discharged internally to VSS through 200µA (nominal) to assure

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.

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

4, 5, 6

A3

SNS the internal sense resistor configuration, the sense resistor is connected between VSS

and SNS.

7

B4

PS

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

closure of a switch to VSS on this pin. Pin has an internal 1mA pull-up to VDD.

8

C4

IS2

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

9

D4

10

E4

11, 12, 13

F3

14

E2

15

E1

16

D1

—

C2

—

D2

IS1

SDA

VSS

SCL

VDD

VIN

SNS

Probe

VSS

Probe

Current-Sense Input. This pin is internally connected to VSS through a 4.7kW resistor.

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 VSS and SNS.

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 VDD.

Do not connect.

Do not connect.

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