Infineon – CoolSiC™ MOSFETs 1700V in SMD package
The next level of simplicity and safety in high voltage auxiliary power supplies!
Infineon´s first SiC MOSFET portfolio in 1700V class is targeting the auxiliary power supply circuit, which generates power for control logic, displays and cooling fans in three-phase power systems. Industry´s preferred practice for such low-power application– the single-ended flyback topology- can now be used even up to 1000V DC input voltage. 1700V blocking voltage eliminates design concerns on voltage stress margin and reliability of power supply. With SiC MOSFET technology, low on-resistance and device capacitances compared to 1500V Si MOSFETs result in more than 50% loss reduction and enables compact SMD integration using natural convection cooling without a heatsink. The new 1700V CoolSiC™ trench MOSFETs are optimized for fly-back topologies with +12V / 0V gate-source voltage compatible with common PWM controllers, and thus no need for a gate driver IC. The new D2PAK-7L package fulfills 1700V safety requirements with >7mm creepage and clearance distances, which minimizes isolation effort in the PCB design.
Features:
- Optimized for fly-back topologies
- Extremely low switching loss
- 12V / 0V gate-source voltage compatible with common PWM controllers
- Fully controllable dV/dt for EMI optimization
- SMD package with enhanced creepage and clearance distances, > 7mm
Benefits:
- 1700V SiC MOSFET enables simple single-ended fly-back topology at high efficiency level
- SMD integration into PCB, with natural convection cooling without extra heatsink
- Reduced isolation effort by extended creepage and clearance distances of package
- Reduced system complexity
- High power density
Target applications:
- Solutions for solar energy systems
- Industrial drives
- Energy Storage Systems
- Fast EV charging
- Power supplies (SMPS)
Competitive advantage:
- Infineon CoolSiC™ trench technology with superior gate oxide reliability
- Optimized for fly-back topologies with +12V / 0V gate-source voltage compatible with common PWM controllers
- Lowest device capacitances and gate charges seen in 1700V switches
- Benchmark gate threshold voltage, VGS(th) >4V
- New D2PAK-7L package with extended creepage and clearance distances for 1700V safety requirements
Application diagram:
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