TIDA-00912
Shunt-Based High Current Measurement (200-A) Reference Design with Reinforced Isolation Amplifier
TIDA-00912
Overview
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 isolation
- Limiting shunt voltage to 25 mV reduces power dissipation
- High-side current sense circuit with high common-mode voltage of 1500-Vpeak, supporting up to 690-V AC mains powered drives
- Calibrated AC accuracy of <1% across temperatures of -25oC to 85oC
- Can interface directly with differential or single-ended ADC
- Small form-factor push pull-based isolated power supply to power high-side circuit
Industrial
- Analog-controlled industrial AC/DC
- Central inverter
- Compact relay
- Contractor circuit
- DC fast charging station
- DC wallbox charger
- Digital controlled industrial AC/DC
- EV charging station power module
- IGBT-based servo power stage
- Industrial battery chargers
- Isolated AC drive power stage
- L1 Residential Chargers
- L2 Commercial Chargers
- L2 Residential Chargers
- Merchant DIN rail power supply
- Motor protection relay & contactors
- Multi-axis servo drive
- Narrow input range
- Power conversion system (PCS)
- Programmable DC power supply
- Servo drive active frontend
- Signal generator
- Single phase line interactive UPS
- Single phase online UPS
- Single phase wireless EV charging station
- Three Phase String Inverter
- Three phase UPS
- Three phase wireless EV charging station
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
Start development
Technical documentation
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | Shunt Based High Current Measurement 200-A Reinforced Amplifier Design Guide (Rev. A) | Sep. 21, 2016 |
Related design resources
Design tools & simulation
SIMULATION TOOL
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.