DS2786 Overview
The DS2786 estimates available capacity for rechargeable Li-Ion and Li-Ion Polymer batteries based on the cell voltage in the open-circuit state following a relaxation period. The open-circuit voltage (OCV) is used to determine relative cell capacity based on a lookup table stored in the IC. This capability makes accurate capacity information available immediately after a battery pack is inserted. During periods of moderate to high rate discharging, which preclude OCV measurements, the DS2786 uses coulomb counting as a secondary means of estimating relative capacity. The DS2786 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...
DS2786 Key Features
- Relative Capacity Calculated from
- Accurate Warning of Low Battery Conditions
- 12-Bit Battery Voltage Measurement
- 11-Bit Bidirectional Current Measurement
- Current Accumulation Measurement
- Internal Temperature Measurement
- Two 11-Bit Aux Input Voltage Measurements
- VOUT Pin Drives Resistive Dividers, Reduces
- 2-Wire Interface
- Low Power Consumption
DS2786 Applications
- 20ºC to +70ºC 10 TDFN-EP