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Surface Mounting Technology: Merging with High Vol…
07-01-2018 Hits:2732 Industry Newseed 
Super User
Unitshine announces the SMTAEZCSP series of high voltage diodes are available from 3,000 to 8,000 volts and custom versions are available in a few other configurations.This series of high voltage diode features a unique miniature arrangement that allows for very limited space than typical radial leaded parts. This makes them ideal for applications in air or other conditions with demanding requirements sensitive in dimension.“We’ve been producing surface mounting technological high voltage product for some time,” said Mr Chong, Technical Product Manager for Unitshine plant. “Our customers have been exceptionally satisfied with the performance of the line we’ve designed, which will be a great benefit to those designing for specialty demands.”From time to time, Unitshine is about to present high voltage diode that shall cover more volts in this type of package. Full product details can be found on the company’s website, and the parts are in stock and immediately available...
Find more...Test and Detection of High Voltage Silicon Stack
23-08-2017 Hits:2814 Industry Newseed Super User
High voltage silicon stack is composed of multiple high voltage rectifier diodes (silicon particles) in series. When it is tested and detected, the multimeter can be used with the stall of R × 10k to measure its positive and reverse resistance. Normally for high voltage silicon stack, the forward resistance is greater than 200kΩ, and reverse resistance is infinite. If the measured positive and negative have a certain value, then the high-voltage silicon stack could be decided as soft breakdown. Another method is available. As high voltage silicon stack could functionally be used for rectifying, the multimeter could be switched to DC voltage stall of 250V or 500V, as shown in figure, the high voltage silicon stack is put in series and connected to the 220V AC power supply. Due to the rectifier effect, any deflection of the multimeter pointer will reflect the average current after half...
Find more...Selection of Heat Sink for Power Modules
29-05-2017 Hits:2515 Industry Newseed Super User
Cooling conditions directly affect whether devices can reliably and safely work or not. Different devices and diverse operating conditions require different heat dissipation conditions. At the same time due to size limitation of installation box, and various cooling and ventilation conditions, the choice of heat sinks are not always same. The following paragraph describes how to choose the heat sinks. The choice of heat sinks should be based on the actual cooling conditions for the devices including load conditions on stable and transient state, ventilation conditions for installing etc. Appropriate consideration of safety factor is necessary, and design shall be made according to the principle that the maximum working temperature of the device shall not be exceeded on steady state. First, calculate the device's power consumption PAV based on the actual operating current IT (AV) of the device. The formula is as below: PAV = 0.785VTM * IAV + 0.215VTO * ITAV...
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