Products
Delivering precision, reliability, and innovation in voltage measurement tools.
The clipper (Passive test probe for Power Transistors)
Features
- Measure conduction voltage during operation
- Input Voltages up to 1500V
- 2 measurement ranges(Hi and Lo)
- Clipped voltage >100nS 2V or 15V
- measurment times <80ns
- passive System – no power supply needed
- >99% Voltage transfer from Input to Output
No offset, no noise, no Calibration
Explanation (clipper in high range)
T1 Mosfet on current increasing
Vds about 2V Rds~1.05Ω
T2 mosfet off,
Vds increase to 1000V
Clipper clamps voltage
T3 mosfet
current fallen
Vds about 1.8V
Rds ~1.05Ω
Rds can be measured 150nS after switching 1000V
Our Major Distributors
Use Vds to indicate device temperature
- The Vds on Mosfets increases with temperature.
- The change is device dependent, SiC has about 50% increase from 50 to 150°C
- Superjunction are about 100% increase from 25-125°C
- Gan is much more complicated,
Thermal transient
- For smd parts <10mS
- for to247 ~100mS