Product Details
Key Features
Applications/Uses
Functions | Fuel Gauge |
Battery Type | 1 Cell Li-Ion |
Interface | 2-Wire |
User Data Storage (Bytes) | 32 EEPROM |
Parameters Measured | Current Temperature Voltage |
End Equipment | Host |
VSUPPLY (V) (min) | 2.5 |
VSUPPLY (V) (max) | 4.5 |
Package/Pins | TDFN/10 |
Oper. Temp. (°C) | -40 to +85 |
Budgetary Price (See Notes) | 2.61 |
Simplified Block Diagram
Technical Docs
Data Sheet | Stand-Alone OCV-Based Fuel Gauge | May 21, 2010 | |
Tutorial | Important Considerations for Infusion Pump and Portable Medical Designs |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact [email protected] with any questions regarding this Sample Site.
Parameters
Functions | Fuel Gauge |
Battery Type | 1 Cell Li-Ion |
Interface | 2-Wire |
User Data Storage (Bytes) | 32 EEPROM |
Parameters Measured | Current Temperature Voltage |
End Equipment | Host |
VSUPPLY (V) (min) | 2.5 |
VSUPPLY (V) (max) | 4.5 |
Package/Pins | TDFN/10 |
Oper. Temp. (°C) | -40 to +85 |
Budgetary Price (See Notes) | 2.61 |
Key Features
- Relative Capacity Calculated from Combination Coulomb Counter and Open-Circuit Cell Voltage (OCV) Battery Model
- Accurate Warning of Low-Battery Conditions Even on First Cycle (No Learn Cycle Needed)
- 12-Bit Battery Voltage Measurement
- ±10mV Accuracy
- 1.22mV LSB, 0V to 4.5V Input Range
- 11-Bit Bidirectional Current Measurement
- 25µV LSB, ±51.2mV Dynamic Range
- 1.67mA LSB, ±3.4A (RSNS = 15mΩ)
- Current Accumulation Measurement Resolution
- ±204.8mVh Range
- ±13.65Ah (RSNS = 15mΩ)
- Internal Temperature Measurement
- 0.125°C LSB, ±3°C Accuracy
- Two 11-Bit Auxiliary Input-Voltage Measurements
- ±8 LSB Accuracy, Ratiometric Inputs Eliminate Supply Accuracy Issues
- VOUT Pin Drives Resistive Dividers, Reduces Current Consumption
- 2-Wire Interface
- Low Power Consumption
- Active Current: 50µA (typ), 80µA (max)
- Sleep Current: 1µA (typ), 3µA (max)
Applications/Uses
- 3G Multimedia Wireless Handsets
- Digital Audio (MP3) Players
- Digital Still Cameras
Description
Remaining capacity is reported in percent, along with cell voltage, current, and temperature information. Cell characteristics and application parameters used in the calculations are stored in on-chip EEPROM.
The DS2786B is intended for use on the host side of portable devices, though it can also be mounted within a battery pack. Measurement and estimated capacity data are accessed through an I²C interface. Temperature data is available from an on-die sensor. Resistance measurements of a pack identification resistor and pack thermistor are supported by ratiometric measurements on two auxiliary inputs.
The DS2786B comes in a 10-pin, lead-free, TDFN 3mm x 3mm package with an exposed pad (EP).
Technical Docs
Data Sheet | Stand-Alone OCV-Based Fuel Gauge | May 21, 2010 | |
Tutorial | Important Considerations for Infusion Pump and Portable Medical Designs |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact [email protected] with any questions regarding this Sample Site.