The TIDA-00914 reference design realizes a reinforced isolated 3-phase inverter sub-system using isolated IGBT gate drivers and isolated current/voltage sensors. Precise in-line shunt based motor phase current sensing is done with AMC1306E25 delta sigma modulators. The modulator output is Manchester encoded which simplifies the clock and data signal routing between the MCU and modulators. High CMTI of the modulator helps suppress the inverter switching noise transients from corrupting the data on the controller side. The small size of the modulator enables a compact solution. The TIDA-00914 provides an interface to connect to an external MCU or FPGA where digital SINC filters can be implemented to demodulate the AMC1306E25 output bitstream. This reference design uses the F28379D delfino control card which is connected to the TIDA-00914 card through an adapter card to implement SINC filters for current sensing.
Features:
- Simplified clock routing to delta sigma modulators due to Manchester encoded data output
- Small pin count (8) enables compact solution
- High CMTI of modulator (>50 kV/us) improves noise immunity to switching transients
- Short circuit response time of less than 1.5 µs
- Calibrated full scale accuracy of
- Nominal phase current measurement range of 28 Arms and peak measurement range of +/-80 Apk
Parts Include:
AMC1306E25 Small Reinforced Isolated Modulator With ±250mV Input and Manchester-Encoded CMOS Interface
LM3480 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator
SN74LVC1G17 Single Schmitt-Trigger Buffer
TLV1117 Single Output LDO, 800mA, Fixed and Adj., Internal Current limit, Thermal Overload Protection
TLV521 350-nA Nanopower, Single, RRIO, CMOS Input, Operational Amplifier for Cost-Sensitive Systems
TLV704 24-V Input Voltage, 150-mA, Ultralow IQ Low-Dropout Regulators
Learn more by downloading the reference design below
Advertisement
Learn more about Texas Instruments
