BQ78412 Series
Pb-acid battery State-of-charge Indicator with Run-Time Display
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Pb-acid battery State-of-charge Indicator with Run-Time Display
| Part | Battery Chemistry | Interface | Supplier Device Package | Package / Case | Package / Case [x] | Package / Case [x] | Mounting Type | Operating Temperature [Max] | Operating Temperature [Min] | Function | Number of Cells | Contents | Supplied Contents | Utilized IC / Part | Secondary Attributes | Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ78412DDWR | Lead Acid | UART | 44-HTSSOP | 44-PowerTSSOP | 6.2 mm | 0.244 in | Surface Mount | 85 °C | -40 °C | Battery Monitor | 1 | |||||
Texas Instruments BQ78412DDWT | Lead Acid | UART | 44-HTSSOP | 44-PowerTSSOP | 6.2 mm | 0.244 in | Surface Mount | 85 °C | -40 °C | Battery Monitor | 1 | |||||
Texas Instruments BQ78412EVM | Battery Gauge | Board(s) | Board(s) | BQ78412 | On-Board LEDs | Power Management |
Key Features
• Designed for Use with 12-V Lead Acid Batteries in Consumer UPS SystemsProgrammable Cell Models for Enhanced Pb-Acid Gas Gauging PerformanceProvides 10-LED Bar Graph of Run-Time Remaining During Discharge and% Capacity During ChargeCan Be Easily Integrated Into Battery CoverWorks with Pb-Acid Batteries Up to 327 AhRecords Cumulative Usage Data Internally for Warranty Return AnalysisOn-Chip Temperature SensorData Interface for Retrieving Warranty InformationFully Programmable Features and Thresholds via UART Serial InterfaceState-of-Health (SoH) Determination and Status ReportingIncludes Configurable Audible Indicator for Low-Capacity, Low-Voltage,and Overvoltage WarningsAddressable Commands for Use in Multi-Battery SystemsOptional Infra-Red Communications InterfaceAPPLICATIONSStand-Alone Uninterruptible Power Supplies12-V Pb-Acid Battery MonitorsBattery Warranty Data Logging EquipmentDesigned for Use with 12-V Lead Acid Batteries in Consumer UPS SystemsProgrammable Cell Models for Enhanced Pb-Acid Gas Gauging PerformanceProvides 10-LED Bar Graph of Run-Time Remaining During Discharge and% Capacity During ChargeCan Be Easily Integrated Into Battery CoverWorks with Pb-Acid Batteries Up to 327 AhRecords Cumulative Usage Data Internally for Warranty Return AnalysisOn-Chip Temperature SensorData Interface for Retrieving Warranty InformationFully Programmable Features and Thresholds via UART Serial InterfaceState-of-Health (SoH) Determination and Status ReportingIncludes Configurable Audible Indicator for Low-Capacity, Low-Voltage,and Overvoltage WarningsAddressable Commands for Use in Multi-Battery SystemsOptional Infra-Red Communications InterfaceAPPLICATIONSStand-Alone Uninterruptible Power Supplies12-V Pb-Acid Battery MonitorsBattery Warranty Data Logging Equipment
Description
AI
The bq78412 Pb-Acid Battery State-of-Charge (SoC) Indicator with Run-Time Display is a complete stand-alone battery gas-gauge solution designed for single 12V Pb-Acid batteries. The bq78412 displays remaining Run-Time-To-Empty during discharge and Percent (%) capacity during charge using a 10-LED (light-emitting diode) bar graph.
The bq78412 monitors battery voltage, current, and ambient temperature to calculate state-of-charge and determine remaining runtime-to-empty. Measured values can be recorded and tracked for later retrieval for warranty purposes.
Programmable cell models allow the bq78412 to be customized to a variety of Pb-Acid formulations and capacities.
Current measurements and Coulomb-counting for gas-gauging are also automatically performed by the bq78412. Current measurements use a small value sense resistor placed in the negative power path and calibrated in-circuit. This allows the precise, continuous, real-time calculation of battery capacity and run-time-to-empty values.
Temperature sensing augments gas-gauge and capacity information using a firmware algorithm to compensate for the temperature effects on capacity.
A serial port is available for configuring various programmable parameters including cell models, calibration values, serial number and date of manufacture. The serial port can operate an infra-red (IR) interface to allow connector-less data acquisition. The bq78412 is easily configurable, is fully programmed and requires no algorithm or firmware development
The bq78412 Pb-Acid Battery State-of-Charge (SoC) Indicator with Run-Time Display is a complete stand-alone battery gas-gauge solution designed for single 12V Pb-Acid batteries. The bq78412 displays remaining Run-Time-To-Empty during discharge and Percent (%) capacity during charge using a 10-LED (light-emitting diode) bar graph.
The bq78412 monitors battery voltage, current, and ambient temperature to calculate state-of-charge and determine remaining runtime-to-empty. Measured values can be recorded and tracked for later retrieval for warranty purposes.
Programmable cell models allow the bq78412 to be customized to a variety of Pb-Acid formulations and capacities.
Current measurements and Coulomb-counting for gas-gauging are also automatically performed by the bq78412. Current measurements use a small value sense resistor placed in the negative power path and calibrated in-circuit. This allows the precise, continuous, real-time calculation of battery capacity and run-time-to-empty values.
Temperature sensing augments gas-gauge and capacity information using a firmware algorithm to compensate for the temperature effects on capacity.
A serial port is available for configuring various programmable parameters including cell models, calibration values, serial number and date of manufacture. The serial port can operate an infra-red (IR) interface to allow connector-less data acquisition. The bq78412 is easily configurable, is fully programmed and requires no algorithm or firmware development