DS2762AXSLASHTR datasheet(6/25 Pages) MAXIM

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DS2762 High-Precision Li+ Battery Monitor With Alerts

6 of 25

PIN DESCRIPTION

TSSOP

FLIP

CHIP

SYMBOL

FUNCTION

1C1

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

protection FET.

2B1

PLS

Battery Pack Positive Terminal Input. The DS2762 monitors the pack plus terminal

through PLS to detect overcurrent and overload conditions, as well as the presence of a

charge source. Additionally, a charge path to recover a deeply depleted cell is provided

from PLS to VDD. In sleep mode (with SWEN = 0), 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.

3B2

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

discharge protection FET.

4, 5, 6

SNS

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

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

and SNS.

7B4

Data Input/Out. 1-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.

8C4

IS2

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

W resistor.

9D4

IS1

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

W resistor.

Connect a 0.1

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

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 1

mA pullup to VDD.

11, 12, 13

VSS

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.

PIO

Programmable I/O Pin. Can be configured to be used to control and monitor user-

defined external circuitry or as an interrupt output to alert the host when preset current

accumulator or temperature limits are exceeded. Open drain to VSS.

VDD

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

decoupling network.

VIN

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

pin has a weak pullup to VDD.

—C2

SNS

Probe

Do not connect.

—D2

VSS

Probe

Do not connect.

DS2762AX/TR Datasheet(PDF) 6 Page - Maxim Integrated Products

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