DS2777 MAXIM [Maxim Integrated Products], DS2777 Datasheet - Page 7

• Manufacturer Part Number: DS2777
• Description: 2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
• Manufacturer: MAXIM [Maxim Integrated Products]

(T
A
= +25°C, unless otherwise noted.)
125
125
PIN
-25
-75
10
11
12
13
14
—
75
25
1
2
3
4
5
6
7
8
9
-0.052
Protector and Optional SHA-1 Authentication
-0.032
SCL/OVD
2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
CURRENT MEASUREMENT
SDA/DQ
NAME
V
V
SNS
SRC
V
PIO
PLS
V
CC
DC
VB
CP
EP
IN2
IN1
DD
SS
-0.012
ACCURACY
_______________________________________________________________________________________
V
SNS
-20°C
Charge Control. Charge FET control output.
Chip-Supply Input. Bypass with 0.1μF to V
Discharge Control. Discharge FET control output.
Battery Voltage Sense Input 2. Connect to highest voltage potential positive cell terminal through
decoupling network.
Battery Voltage Sense Input 1. Connect to lowest voltage potential positive cell terminal through decoupling
network.
Regulated Operating Voltage. Bypass with 0.1μF to V
Device Ground. Chip ground and battery-side sense resistor input.
Sense Resistor Connection. Pack-side sense resistor sense input.
Programmable I/O. Can be configured as wake input.
Pack Plus Terminal Sense Input. Used to detect the removal of short-circuit, discharge overcurrent, and
charge overcurrent conditions.
Data Input/Output. Serial data I/O, includes weak pulldown to detect system disconnect and can be
configured as wake input for 1-Wire devices.
Serial Clock Input/Overdrive Select. Communication clock for 2-wire devices/overdrive select pin for
1-wire devices.
Protection MOSFET Source Connection. Used as a reference for the charge pump.
Charge Pump Output. Generates gate drive voltage for protection FETs. Bypass with 0.47μF to SRC.
Exposed Pad. Connect to ground or no connection.
(mV)
0.008
+70°C
0.028
+25°C
0.048
Typical Operating Characteristics (continued)
7
6
5
4
3
2
1
0
0
1kΩ RESISTOR FROM PLS TO PK+
1
2
I
RC
SS
V
vs. V
DD
3
.
(V)
DD
FUNCTION
4
SS
5
.
6
-1
-2
-3
-4
-5
2
1
0
-20
CURRENT MEASUREMENT OFFSET
0
Pin Description
vs. TEMPERATURE
TEMPERATURE (°C)
20
40
60
7