DS2786G+T

The DS2786G+T&R is a stand-alone open-circuit voltage (OCV)-based fuel gauge IC designed by Analog Devices Inc. (ADI), also known as Maxim Integrated. This device is specifically tailored for estimating the available capacity of rechargeable lithium-ion (Li+) and lithium-polymer batteries.

Key Features and Specifications:

1. OCV-Based Capacity Estimation:
   • The DS2786G+T&R estimates battery capacity based on the cell voltage in the open-circuit state after a relaxation period. This capability allows for accurate capacity information to be available immediately after a battery pack is inserted.
2. Coulomb Counting:
   • As a secondary means of estimating relative capacity, the DS2786G+T&R uses coulomb counting. Remaining capacity is reported in percent along with cell voltage, current, and temperature information.
3. On-Chip EEPROM:
   • Cell characteristics and calculations are stored in on-chip EEPROM, ensuring that critical data is retained even when power is removed.
4. Temperature Sensor:
   • An on-die sensor provides temperature data, enabling accurate temperature-compensated capacity estimation.
5. Interface:
   • Measurement and estimated capacity data are accessed through an I2C interface, providing a simple and efficient way to communicate with the device.
6. Package:
   • The DS2786G+T&R is packaged in a 10-pin thin dual flat no-lead (TDFN) package, which is compact and suitable for surface mount technology (SMT) assembly.
7. Operating Range:
   • The device operates within a supply voltage range of 2.5V to 4.5V and an operating temperature range of -20°C to 70°C.
8. Measurement Accuracy:
   • Offers 12-bit battery voltage measurement with ±10mV accuracy and 11-bit bidirectional current measurement with a dynamic range of ±51.2mV.
9. Applications:
   • Ideal for use in battery-powered devices that require precise battery management and capacity estimation, such as portable electronics, mobile devices, and more.

Additional Notes:

• The DS2786G+T&R is part of ADI’s extensive portfolio of battery management ICs, which offers a wide range of solutions for monitoring and managing battery health and performance.
• With its OCV-based capacity estimation and coulomb counting capabilities, the DS2786G+T&R provides accurate and reliable battery capacity information, enabling better power management and longer battery life in applications.

In summary, the DS2786G+T&R is a high-performance, stand-alone fuel gauge IC from ADI that offers accurate capacity estimation based on OCV and coulomb counting. Its compact packaging, wide operating range, and precise measurement capabilities make it an excellent choice for battery-powered devices requiring precise battery management.