Reference Designs
Small Form-Factor Reinforced Isolated IGBT Gate Drive Reference Design for 3 Phase Inverter
Texas Instruments
The TIDA-00446 reference design consists of six reinforced isolated IGBT gate drivers along with dedicated gate drive power supplies. This compact reference design is intended to control IGBT’s in 3-phase inverters like AC drives: uninterruptible power supplies (UPS) and solar inverters. The design uses a reinforced isolated IGBT gate driver with DESAT feature and built-in miller clamp protection: enabling use of unipolar supply voltage for the gate drive. Open loop push pull topology based power supply for each gate driver provides flexibility in PCB routing. The push pull transformer driver used in TIDA-00446 operates at 420 khz which helps in reducing the size of the isolation transformer leading to compact power supply solution. Gate drive power supply can be disabled to facilitate safe torque off (STO).
Features
- Suited for low voltage drives (400 Vac and 690 Vac)Integrated 2.5A source and 5A sink current suits driving IGBT modules with currents up to 50ABuilt in miller clamp functionality enables use of unipolar supply voltage (+17 V) for driving IGBTBuilt in protection functionalitiesShort circuit protection through DESAT detectionSupply Undervoltage protectionProvision for separate Rg(ON) and Rg(OFF)8000 Vpk Reinforced IsolationVery high CMTI of > 100 kV/usSpread spectrum operation of transformer driver helps reduce EMI.PWM and fault signals of gate drivers can be directly interfaced to controller (3.3V operation)
Applications
- String inverter
- AC drive power stage module
- AC-input BLDC motor drive
- Three phase UPS
- Off-highway vehicles control
- Textile machine
- Printing & paper machine
- Servo drive power stage module
- Servo drive power supply module
- Central inverter
- Injection molding machine
- Robot servo drive
End Equipment Reference Diagrams
Application Area
End Equipment
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