500 kHz Coreless External Primary Current Sensor
MLX91235 Melexis
The MLX91235 is a high-accuracy coreless current sensor allowing measurements from 200A up to 10'000A while eliminating the need for a ferromagnetic concentrator, in automotive or any high-power application.
Top features
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Coreless technology
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No need for a ferromagnetic concentrator (C-core, U-shield)
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Work closely with Melexis to ensure the best mechanical integration
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DSP compensation for high-accuracy
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<0.5% thermal sensitivity drift from -40°C to 150°C-
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<1% total sensitivity drift (thermal & lifetime) from -40°C to 150°C
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Limited noise degradation over temperature
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Open calibration via SPI
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End-of-line programmable
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For easy in-situ adjustment
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High-speed sensing
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DC to 500 kHz bandwidth
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1.5 μs response time
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Protection & diagnostics (via SPI)
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Overcurrent detection (programmable, 1% accuracy) with fast detection (1.5µs)
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Temperature monitoring
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Self-test functionality
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Broken wire detection
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Operating range
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Supply 3.3V and 5V
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Temperature from -40°C to 165°C
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Ratiometric output
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- ISO 26262 ASIL B compliant SEooC (Safety Element out of Context)
- AEC-Q100 – Grade 0 Automotive Qualified
- RoHS-compliant package SOIC-8 (die up)
500 kHz Coreless External Primary Current Sensor - MLX91235
Product description
The MLX91235 is a smart high-speed, coreless current sensor IC with stray field immunity. Its coreless design eliminates the need for external ferromagnetic elements (like C-cores or U-shields), reducing the system’s BOM.
This monolithic Hall-effect sensor accurately measures (differential measurement) the magnetic flux density applied perpendicularly to its surface, providing a proportional analog output voltage.
The transfer characteristic of the MLX91235 is factory-trimmed over temperature. Additionally, the MLX91235 is programmable (fine gain, offset, overcurrent threshold) via a digital full-duplex SPI interface during end-of-line customer calibration. Finally, the integrated stress sensor compensates for lifetime effects, ensuring long-term accuracy.
Melexis' application engineers are ready to collaborate with you to ensure the best mechanical integration is chosen for your application.
Application examples
Automotive, e-mobility and beyond
- Inverter
- Battery Management System (BMS)
- Low voltage DC-DC converter
- Smart battery junction box
- Smart fuse
- Power distribution
Features and benefits
-
Coreless technology
-
No need for a ferromagnetic concentrator (C-core, U-shield)
-
Work closely with Melexis to ensure the best mechanical integration
-
-
DSP compensation for high-accuracy
-
<0.5% thermal sensitivity drift from -40°C to 150°C-
-
<1% total sensitivity drift (thermal & lifetime) from -40°C to 150°C
-
Limited noise degradation over temperature
-
-
Open calibration via SPI
-
End-of-line programmable
-
For easy in-situ adjustment
-
-
High-speed sensing
-
DC to 500 kHz bandwidth
-
1.5 μs response time
-
-
Protection & diagnostics (via SPI)
-
Overcurrent detection (programmable, 1% accuracy) with fast detection (1.5µs)
-
Temperature monitoring
-
Self-test functionality
-
Broken wire detection
-
-
Operating range
-
Supply 3.3V and 5V
-
Temperature from -40°C to 165°C
-
Ratiometric output
-
- ISO 26262 ASIL B compliant SEooC (Safety Element out of Context)
- AEC-Q100 – Grade 0 Automotive Qualified
- RoHS-compliant package SOIC-8 (die up)
