ds2761 Maxim Integrated Products, Inc., ds2761 Datasheet - Page 4

• Manufacturer Part Number: ds2761
• Description: Ds2761 High-precision Li+ Battery Monitor
• Manufacturer: Maxim Integrated Products, Inc.

Table 1. DETAILED PIN DESCRIPTION
SYMBOL
Probe
Probe
VSS
SNS
SNS
VSS
PLS
VIN
V
PIO
DQ
IS1
IS2
CC
DC
PS
DD
TSSOP
13,14,
4,5,6
N/A
N/A
14
10
16
15
15
1
3
7
2
9
8
CHIP
FLIP
D1
A3
D4
D2
C1
B2
B4
E2
B1
E4
E1
C4
C2
F3
Charge Protection Control Output. Controls an external p-channel
high-side charge protection FET.
Discharge Protection Control Output. Controls an external p-channel
high-side discharge protection FET.
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
1mA pull-down for sensing disconnection.
Programmable I/O Pin.
external circuitry. Open drain to VSS.
Battery Pack Positive Terminal Input. The DS2761 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 V
mode (with SWEN = 0), any capacitance or voltage source connected to
PLS is discharged internally to V
reliable detection of a valid charge source. For details of other internal
connections to PLS and associated conditions see the Li+ Protection
Circuitry section.
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 V
Voltage Sense Input. The voltage of the Li+ cell is monitored via this
input pin. This pin has a weak pullup to V
Power Supply Input. Connect to the positive terminal of the Li+ cell
through a decoupling network.
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.
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.
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.
Current Sense Input. This pin is internally connected to SNS through a
4.7kW resistor.
Do Not Connect.
Do Not Connect.
4 of 24
DD
.
DESCRIPTION
Used to control and monitor user-defined
SS
through 200mA (nominal) to assure
DD
.
DD
. In sleep
DS2761