A sensor measures current in vehicles, batteries, inverters, and industrial systems, with adjustable settings and operation at high temperatures.
TDK Corporation has introduced the Micronas CUR 3020, a customer-programmable linear Hall-effect current sensor IC for electric vehicle (xEV) traction inverters, personal mobility and auxiliary (AUX) inverters, battery management and disconnect systems, and industrial current sensor modules (CSMs). The device uses a C-core magnetic concentrator and offers selectable bandwidths of 250 kHz and 500 kHz. Its wafers are manufactured at TDK’s fabrication facility in Freiburg, Germany, supporting production control and long-term supply. Samples are available on request.
The CUR 3020 provides a voltage output proportional to the applied magnetic field. Its quiescent voltage output (QVO) is centred at 2.5 V for bidirectional current measurement and can be adjusted by the user. The output sensitivity is programmable from 4.2 to 67.4 mV/mT to support different maximum current levels.
The sensor uses electrically erasable programmable read-only memory (EEPROM) to configure its sensitivity and QVO for specific applications. Its accuracy can be adjusted using three programming methods described in the CUR 3020 programming guide, available on request. The device is configured to limit sensitivity and offset drift across temperature variations over the automotive Grade 0 operating range.
Some of the key features of the Micronas CUR 3020 include:
- Maximum sensitivity drift error of 1% from −40°C to 150°C.
- Maximum offset drift error of 5 mV from −40°C to 150°C.
- Programmable bandwidth of 250 or 500 kHz.
- Selectable sensitivity range of 4.2 to 67.4 mV/mT.
- Automotive Electronics Council qualification under Grade 0, with an increased ambient operating temperature of 165°C.
Housed in a four-pin TO-92 package (UM), the CUR 3020 incorporates a high-sensitivity Hall element. It includes user-selectable output voltage clamps that can be enabled or disabled, broken-ground and broken-wire detection, and overtemperature diagnostics. Its hot ambient operating temperature has been increased to 165°C for short periods to support the thermal conditions found in xEV traction inverters.
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