DS2720

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Table 1. DETAILED PIN DESCRIPTION

SYMBOL

DESCRIPTION

PLS

Battery-Pack Positive Terminal Input. The device monitors the state of the battery

pack’s positive terminal through this pin in order to detect events such as the attachment

of a charger or the removal of a short circuit. Connect PLS to the pack positive terminal

through a 100

W resistor.

PS

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

DQ

Data Input/Out. 1-Wire data line. Open-drain output driver. Connect this pin to the

DATA terminal of the battery pack. DQ has an internal 0.5

mA pull-down.

Device Ground. Connect directly to the negative terminal of the battery cell.

decoupling network.

CP

Charge Pump Output. The internal charge pump regulates CP to 9V which supplies

the ON state drive to the protection FETs. Connect a 0.1

mF reservoir capacitor from CP

CC

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

protection FET.

DC

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

discharge protection FET.

Figure 2. APPLICATION EXAMPLE

CP

CC

DC

PS

PLS

VDD

VSS

DQ

DS2720

1-CELL Li+

1k

102

102

104

PACK+

PS

DATA

PACK-

100

330

330

10

104

102

1k