Shunt-Based High Current Measurement (200-A) Reference Design with Reinforced Isolation Amplifier
Description
This isolated current measurement reference design uses external shunts: reinforced isolation amplifiers and isolated power supply. The shunt voltage is limited to 25-mV max. This reduces power dissipation in the shunt to enable a high-current measurement range up to 200 A. Shunt voltage is amplified by an instrumentation amplifier configuration with a gain of 10 to match the input range of the isolation amplifier for better signal-to-noise ratio. The output of the isolation amplifier is level shifted and scaled to fit the input range of 3.3-V ADCs. This design uses a free running transformer driver operating at 410 kHz for generating isolated supply voltage in a small form factor to power the high voltage side of the circuit.
Features
- Shunt-based 200-A peak current measurement with reinforced isolationLimiting shunt voltage to 25 mV reduces power dissipationHigh-side current sense circuit with high common-mode voltage of 1500-Vpeak: supporting up to 690-V AC mains powered drivesCalibrated AC accuracy of oC to 85oCCan interface directly with differential or single-ended ADCSmall form-factor push pull-based isolated power supply to power high-side circuit
Applications
- String inverter
- AC drive power stage module
- HVAC controller
- Three phase UPS
- Merchant battery charger
- Power transfer units
- DIN rail power supply
- AC charging (pile) station
- Textile machine
- Printing & paper machine
- Servo drive power stage module
- Servo drive power supply module
- Central inverter
- DC fast charging station
- Multifunction relay
- Power conversion system (PCS)
- Industrial AC-DC
- Merchant DIN rail power supply
- Signal generator
- Programmable DC power supply
- Single phase online UPS
- HVAC motor control
- AC analog input module
- Compact relay
- Contractor circuit
- DC fast charging power module
- Wireless EV charging station
- Single phase line interactive UPS
- Linear motor power supply
- Three phase UPS control & communication module
Product Categories
- Isolation
| Download the bill of materials for TIDA-00912 | Download |
Test Data
Get results faster with test and simulation data that's been verified.
Download the test file for TIDA-00912| Title | Updated | Type | Size (KB) | |
|---|---|---|---|---|
| TIDA-00912 Gerber | 25 May 2016 | ZIP | 266 | |
| TIDA-00912 CAD Files | 25 May 2016 | ZIP | 2110 | |
| TIDA-00912 PCB | 25 May 2016 | 720 | ||
| TIDA-00912 Assembly Files | 25 May 2016 | ZIP | 159 | |
| TIDA-00912 BOM | 25 May 2016 | 91 | ||
| TIDA-00912 Schematic and Block Diagram | 25 May 2016 | 388 |