Datasheet

DS2775/DS2776/DS2777/DS2778
2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
8 _______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1 CC Charge Control. Charge FET control output.
2 V
DD
Chip-Supply Input. Bypass with 0.1μF to V
SS
.
3 DC Discharge Control. Discharge FET control output.
4 V
IN2
Battery Voltage Sense Input 2. Connect to highest voltage potential positive cell terminal through
decoupling network.
5 V
IN1
Battery Voltage Sense Input 1. Connect to lowest voltage potential positive cell terminal through
decoupling network.
6 VB Regulated Operating Voltage. Bypass with 0.1μF to V
SS
.
7 V
SS
Device Ground. Chip ground and battery-side sense resistor input.
8 SNS Sense Resistor Connection. Pack-side sense resistor sense input.
9 PIO Programmable I/O. Can be configured as wake input.
10 PLS
Pack Plus Terminal Sense Input. Used to detect the removal of short-circuit, discharge overcurrent, and
charge overcurrent conditions.
11 SDA/DQ
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.
12 SCL/OVD
Serial Clock Input/Overdrive Select. Communication clock for 2-wire devices/overdrive select pin for
1-Wire devices.
13 SRC Protection MOSFET Source Connection. Used as a reference for the charge pump.
14 CP Charge Pump Output. Generates gate drive voltage for protection FETs. Bypass with 0.47μF to SRC.
— EP Exposed Pad. Connect to ground or leave unconnected.
TOP VIEW
TDFN
(3mm
×
5mm)
1CC
2V
DD
3DC
4V
IN2
5V
IN1
6VB
7V
SS
14 CP
EP
13 SRC
12 SCL/OVD
11 SDA/DQ
10 PLS
9 PIO
8 SNS
+
DS2775
DS2776
DS2777
DS2778
Pin Configuration