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DS2780
Stand-Alone Fuel Gauge IC
Stand-Alone Fuel-Gauge IC Calculates Remaining Battery Capacity and Simplifies Software Development
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Status
Active: In Production.
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.
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Data Sheet
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An evaluation kit is available: DS2780EVKIT NOTE: This product uses the following:DS2780K Evaluation Kit Software
Key Features
- Precision Voltage, Temperature, and Current Measurement System
- Internal Time Base is Accurate and Temperature Stable
- 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-Wire® Interface
- Tiny 8-pin TSSOP & 10-pin TDFN Package Embeds Easily in Battery Packs Using Thin Prismatic Cells
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Applications/Uses
- 3G Multimedia Wireless Handsets
- Digital Still Cameras
- Handheld PC Data Terminals
- Subnotebook Computers
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Key Specifications:
| Battery Protectors, Selectors and Monitors |
| Part Number |
Functions |
Battery Type |
Interface |
User Data Storage
(Bytes) |
Parameters Measured |
VSUPPLY
(V) |
VSUPPLY
(V) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Oper. Temp.
(°C) |
Budgetary Price |
| min |
max |
max w/pins |
See Notes |
| DS2780 |
Fuel Gauge |
1-2 Cell Li-Ion |
1-Wire |
40 EEPROM |
| Current | | Temperature | | Voltage |
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2.5 |
5.5 |
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11.3 |
-40 to +85 |
$2.91 @1k |
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See All Battery Protectors, Selectors and Monitors (29)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Operating Circuit
Application Notes
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| DS2780E+
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Active |
TSSOP;8 pin;20.3 mm²
Outline Drawing:21-0175 (PDF)
Land Pattern: 90-0248 (PDF)
Use pkgcode/variation: H8+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS2780E+T&R
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Active |
TSSOP;8 pin;20.3 mm²
Outline Drawing:21-0175 (PDF)
Land Pattern: 90-0248 (PDF)
Use pkgcode/variation: H8+2*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS2780G+
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Active |
TDFN;10 pin;11.3 mm²
Outline Drawing:21-0268 (PDF)
Land Pattern: 90-0247 (PDF)
Use pkgcode/variation: T1034N+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS2780G+T&R
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Active |
TDFN;10 pin;11.3 mm²
Outline Drawing:21-0268 (PDF)
Land Pattern: 90-0247 (PDF)
Use pkgcode/variation: T1034N+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-4634
Rev 6;
2009-06-22
This page last modified: 2009-10-06
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