Isolated Current Sense Reference Design (±300 A) for Traction Inverter With Overcurrent Detection
Description
This reference design provides detection of traction motor phase currents. TIDA-01543 realizes an isolated current sensor. Precise in-line huntbased: motor phase current sensing is done with AMC1305M05-Q1 delta-sigma (ΔΣ) modulators and the INA301-Q1 device. The high CMTI of the modulator helps suppress inverter switching transients from corrupting the data on the controller side. The fast response time of the INA301-Q1 enables faster reaction times for overcurrent events. TIDA-01543 provides an interface to connect to an external MCU where digital SINC filters can be implemented to demodulate the AMC1305M05 output bit stream. This reference design uses the C2000 family: automotive-qualified F280049M Piccolo™ microcontroller control card.
Features
- Reinforced: isolated ΔΣ modulator to measure in-line motor phase current with shunt resistorShort-circuit response time of Nominal-phase current measurement range of ±300 A; transient peak range of ±80 Apk with 100-μΩ shunt resistorCalibrated full-scale error of Short-circuit response time of 300 ns with INA301 (parallel configuration alongside the AMC modulator)High CMTI of modulator (> 15 kV/μs) improves noise immunity to switching transients
Applications
- AC analog input module
- Traction inverter-high voltage
- Traction inverter-low voltage
- Bidirectional 400-V & 800-V to LV
Product Categories
- Isolation