DS2720BU/TR データシートの表示（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS2720BU/TR

Efficient, Addressable Single-Cell Rechargeable Lithium Protection IC

Dallas Semiconductor -> Maxim Integrated 

DS2720

Table 1. DETAILED PIN DESCRIPTION

SYMBOL DESCRIPTION

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

PLS

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 100W resistor.

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

PS

closure of a switch to VSS on this pin. PS has a high-impedance internal pullup.

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 0.5mA pull-down.

VSS

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

VDD

Power Supply Input. Connect VDD to the positive terminal of the battery cell through a

decoupling network.

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

CP

the ON state drive to the protection FETs. Connect a 0.1mF reservoir capacitor from CP

to VSS.

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

102

102

PACK+

PS

DATA

PACK-

100

102

1k

1k

DS2720

330

PLS CP

PS DC

DQ CC

330

VSS VDD

104

10

1-CELL Li+

104

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