DS2786BG+

The DS2786BG+ is a stand-alone OCV based fuel gauge in 10 pin TDFN package. This device estimates available capacity for rechargeable Li-ion (Li+) and Li+ 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. The DS2786B uses coulomb counting as a secondary means of estimating relative capacity, remaining capacity is reported in percent along with cell voltage, current and temperature information. Cell characteristics and calculations are stored in on-chip EEPROM. 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.

• Supply voltage range is 2.5V to 4.5V
• Operating temperature range from -20°C to 70°C
• Measurement and estimated capacity data are accessed through an I2C interface
• Relative capacity calculated from coulomb counter and open-circuit cell voltage (OCV) battery model
• Accurate warning on low battery conditions, low power consumption
• Optimized for smart phones with push-mail feature
• 12bit battery voltage measurement with ±10mV accuracy, 1.22mV LSB(0V to 4.5V) input range
• 11bit bidirectional current measurement with 25µV LSB ±51.2mV dynamic range, 1.67mA LSB at ±3.4A
• Current accumulation measurement resolution ±204.8mVh and ±13.65Ah (RSNS = 15mΩ) range
• Internal temperature measurement of 0.125°C LSB, ±3°C accuracy

Applications

Multimedia, Portable Devices, Imaging, Video & Vision, Audio

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party