DS2786BG+ by Analog Devices

Stand-Alone OCV-Based Fuel Gauge

Status: Active
Series: DS2786B
RoHS: Unknown
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The DS2786B 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. During periods of moderate to high rate discharging, which preclude OCV measurements, 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 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).

Prices starting from US$3.20


Distributor Starting From Stock
Logo for Newark Electronics Newark Electronics US$4.01
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Logo for element14 element14 US$3.20
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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
±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)
25µV LSB, ±51.2mV Dynamic Range
1.67mA LSB, ±3.4A (RSNS = 15mΩ)
Current Accumulation Measurement Resolution ±204.8mVh Range ±13.65Ah (RSNS = 15mΩ)
±204.8mVh Range
±13.65Ah (RSNS = 15mΩ)
Internal Temperature Measurement 0.125°C LSB, ±3°C Accuracy
0.125°C LSB, ±3°C Accuracy
Two 11-Bit Auxiliary Input-Voltage Measurements ±8 LSB Accuracy, Ratiometric Inputs Eliminate Supply Accuracy Issues
±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)
Active Current: 50µA (typ), 80µA (max)
Sleep Current: 1µA (typ), 3µA (max)

Specifications

Functions Fuel Gauge
Battery Type 1 Cell Li-Ion
Interface 2-Wire
User Data Storage (Bytes) 32 EEPROM
Parameters Measured CurrentTemperatureVoltage
End Equipment Host
VSUPPLY (V) (min) 2.5
VSUPPLY (V) (max) 4.5
Package/Pins TDFN/10
Oper. Temp. (°C) -40 to +85
BudgetaryPrice (See Notes) 2.44


DS2786BG+ Semiconductors - ICs by Analog Devices

BATT FUEL GAUGE LI-ION 4.5V TDFN-10

Status: Unknown
Series: -
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

Specifications

Battery Management Function Fuel Gauge
Battery Type Li-Ion Li-Pol
Supply Voltage Min 2.5V
Supply Voltage Max 4.5V
Battery IC Case Style TDFN
No. of Pins 10Pins
IC Interface Type Serial
Operating Temperature Min -20°C
Operating Temperature Max 70°C
Product Range -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

BATT FUEL GAUGE, LI-ION, 4.5V, TDFN-10 | Farnell
Batt Fuel Gauge, Li-Ion, 4.5V, Tdfn-10 | Newark Electronics

Frequently Asked Questions

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Is the DS2786BG+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Farnell, Newark Electronics and element14 have stock available or on a lead time for DS2786BG+ .

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