Battery Fuel Gauge Ic
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Battery fuel gauge ic. 1 4 series li ion battery pack manager battery fuel gas gauge download datasheet. The measured charge is stored. The application is designed for battery packs with two three or four li ion or li pol cells in a series. Battery fuel gauge ic lc709203f application note 1.
Highly accurate battery fuel gauges are needed to avoid surprise shutdowns and. A precision coulomb counter integrates current through a sense resistor between the battery s positive terminal and the load or charger. The illustration shows a partially discharged battery of 50 soc with 20 empty and 30. What makes our gauges so special.
Using a built in coulomb counter these fuel gauge ics calculate battery charge and store the data in 16 bit resolution for retrieval by the system controller access is via an industry standard i c interface enabling the. Mouser offers inventory pricing datasheets for fuel gauges battery management. An2344 integrates cell balancing and fuel gauge methods into a multi cell battery charger. The results can also be shown on a digital display.
St s battery fuel gauge ics can be located in the battery pack or in the handheld device and integrate functions to monitor the battery voltage current and temperature. Its operating range is perfectly suited for single cell li ion batteries. Impedance track technology based fuel gauging. A battery fuel gauge ic can predict how much longer under specific operating conditions the battery can continue to provide power.
Voltage references 29 voltage supervisors 44 ac dc controllers regulators. Offline controllers 75 offline regulators 106 power factor controllers 22 secondary side controllers 21 load switches. Fuel gauges battery management are available at mouser electronics. Inadequate battery life and unreliable battery soc reporting are some of the most common complaints about any battery powered device.
The application can be used as a complete battery. The tri state fuel gauge reads the learned battery information on the smbus and displays it on a multi colored led bar. The ltc2941 measures battery charge state in battery supplied handheld pc and portable product applications. It includes dedicated pc based software for real time viewing and analysis of the charge cell balance and fuel gauge processes.
Performance specifications 4 1 application field 4 2 electrical characteristics 4 3 communication protocol 4 4 note on electrical characteristics 4 5 about matters that require attention in the board making 4 6 example of standard use of the. Figure 2 illustrates a tri state fuel gauge.
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