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Maxim Integrated Products - Stand-Alone Fuel Gauge IC

Numéro de référence DS2780
Description Stand-Alone Fuel Gauge IC
Fabricant Maxim Integrated Products 
Logo Maxim Integrated Products 





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DS2780 fiche technique
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www.maxim-ic.com
GENERAL DESCRIPTION
The DS2780 measures voltage, temperature and
current, and estimates available capacity for
rechargeable Lithium Ion and Lithium Ion Polymer
batteries. Cell characteristics and application
parameters used in the calculations are stored in on-
chip EEPROM. The available capacity registers
report a conservative estimate of the amount of
charge that can be removed given the current
temperature, discharge rate, stored charge and
application parameters. Capacity estimation reported
in mAh remaining and percentage of full.
APPLICATIONS
Digital Still Cameras
Sub-Notebook Computers
Handheld PC Data Terminals
3G Multimedia Wireless Handsets
TYPICAL OPERATING CIRCUIT
PK+
DATA 150
5.6V
PK-
DS2780
DQ 5
4 VDD
PIO 8
3 VIN
NC 1
6 OVD
SNS 7
2 VSS
TSSOP-8
RSNS
500 1K
1 Cell
Li-Ion
Battery
0.1uF
Protection
Circuit
DS2780
Stand-Alone Fuel Gauge IC
FEATURES
§ Precision Voltage, Temperature, and Current
Measurement System
§ Accurate, Temperature Stable Internal Time
Base
§ Absolute and Relative Capacity Estimated from
Coulomb Count, Discharge Rate, Temperature
and Battery Cell Characteristics
§ Accurate Warning of Low Battery Conditions
§ Automatic Backup of Coulomb Count and Age
Estimation to Nonvolatile (NV) EEPROM
§ Gain and Tempco Calibration Allows the Use of
Low-Cost Sense Resistors
§ 24-Byte Battery/Application Parameter EEPROM
§ 16-Byte User EEPROM
§ Unique ID and Multidrop 1-WireÒ Interface
§ Tiny 8-pin TSSOP Package Embeds Easily in
Battery Packs Using Thin Prismatic Cells
PIN CONFIGURATION
TOP VIEW
TSSOP-8
NC
VSS
VIN
VDD
1
2
3
4
8 PIO
7 SNS
6 OVD
5 DQ
ORDERING INFORMATION
PART
MARKING
DS2780E
DS2780E/T&R
DS2780E+
DS2780E+T&R
2780
2780
2780
2780
PACKAGE INFORMATION
TSSOP
DS2780E, Tape-and-Reel
Lead-Free TSSOP
DS2780E+, Tape and Reel
1-Wire is a registered trademark of Dallas Semiconductor.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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REV: 120904

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