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High Side Current Sense and Fuse Monitor

2015-01-22 00:46  
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View Full Size Image View Original Design NoteHigh Side Current Sense and Fuse Monitor

The LT6100 can be used as a combination current sensor and fuse monitor. This part includes on-chip output buffering and was designed to operate with the low supply voltage (≥2.7V), typical of vehicle data acquisition systems, while the sense inputs monitor signals at the higher battery bus potential. The LT6100 inputs are tolerant of large input differentials, thus allowing the blown-fuse operating condition (this would be detected by an output full-scale indication). The LT6100 can also be powered down while maintaining high impedance sense inputs, drawing less than 1uA max from the battery bus.

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