A 25A Hybrid Magnetic Current Sensor with 64mA Resolution, 1.8MHz Bandwidth, and a Gain Drift Compensation Scheme
- Jouyaeian, A.
- Fan, Q.
- Motz, Mario
- Ausserlechner, Udo
- Makinwa, K.A.A.
Publication date
January 2021
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE)Abstract
Magnetic current sensors are used in switched-mode power supplies and motor drivers, where both galvanic isolation and wide bandwidth (BW) are desired. In CMOS, Hall-effect sensors are widely used, but their resistance results in a fundamental trade-off between BW and resolution. Coils have a differentiating characteristic and so can achieve much wider BW and resolution, but cannot sense DC.</p
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