Vishay / Dale Isolated Current Sensing Reference Design
Vishay / Dale Isolated Current Sensing Reference Design focuses on the current sensing solutions found in high-voltage applications, in which an isolated current sensing circuit is essential. The measured current passes through a shunt resistor with a low temperature coefficient of resistance (TCR), and, in this application, the WSBE and WSL resistors are explored. The voltage drop across the shunt resistance is delivered to a high-performance, differential-output isolated amplifier, the VIA0050DD in this example. The VIA0050DD from Vishay / Dale features a linear differential range of ±50mV, and the differential output voltage between OUTP and OUTN is ±2.05V. The differential output is converted to a single-ended output, providing a range of 0 to 2.5V (OUT to GND), which is then ready to be interfaced with a single-ended analog-to-digital converter (ADC) or multimeter.
Features
- AC current measurement up to 1415A
- Maximum working isolation voltage of 1200VRMS
- Isolated single-ended analog output
- Low temperature offset and GAIN drift
- Bandwidth of approximately 280kHz
Applications
- Motor control
- Power supplies
- Battery monitoring systems
- Charging stations
- EV powertrains
Block Diagram
Key Components
Vishay Semiconductors VIA0050DD Isolation Amplifier
High-performance differential output amplifier ideally suited for shunt-based current sensing.
Vishay / Dale WSBE Power Metal Strip Shunt Resistors
Shunt resistors with low TCR (down to <±10ppm/°C) and very low resistance values (down to 15μΩ).
Vishay / Dale WSL2726 Power Metal Strip® Resistors
4-terminal, sulfur-resistant, AEC-Q200 qualified resistors with resistance values down to 0.0002Ω.
Vishay / Beyschlag ACAS AT Precision Thin Film Chip Resistor Arrays
Offers defined tolerance matching, TCR tracking, and superior moisture resistivity.
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Vishay / Dale Reference Designs
Accelerates development & provides reliable solutions that leverage Vishay's component technology.