48V 3-Phase Inverter with Shunt-based In-line Motor Phase Current Sensing Reference Design
TIDA-00913
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- 48V 3Phase Inverter w/ Shunt-Based In-Line Motor Phase Current Sense Ref Design (Rev. A)
(PDF 4873 KB)
07 Apr 2017
Description
The TIDA-00913 reference design realizes a 48V/10A 3-phase GaN inverter with precision in-line shunt-based phase current sensing for accurate control of precision drives such as servo drives. One of the largest challenges with in-line shunt-based phase current sensing is the high common-mode voltage transients during PWM switching. The INA240 bi-directional current-sense amplifier overcomes this problem using enhanced PWM rejection. The reference design provides an output voltage from 0 to 3.3V, scaled to ±16.5A with 1.65V mid voltage for high phase-current accuracy over the entire temperature range. The TIDA-00913 offers a TI BoosterPack compatible interface to connect to a C2000 MCU LaunchPad™ development kit for easy performance evaluation.
Features
- Wide input voltage range 12V to 60V 3-phase GaN inverter with 7Arms output current per phase and non-isolated phase current sensing.
- Precision in-line phase current sensing with 5mΩ shunt, ±16.5A full scale range and ±10A nominal range.
- High accuracy phase current sensing over the temperature range from -25°C to 85°C. Uncalibrated accuracy <±0.5%; calibrated accuracy <±0.1%.
- System cost reduction using a non-isolated current sense amplifier INA240 with superior AC common mode rejection operating up to PWM switching frequencies up to 100kHz.
- Reduced BOM and easy layout due to the INA240 bi-directional, zero-drift current sense amplifier that directly interfaces to a 3.3V ADC.
- TI BoosterPack compatible interface with 3.3V I/O for easy performance evaluation with a C2000 MCU LaunchPad™ development kit.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
