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Computer products include tablets, notebooks, ultrabooks, embedded systems, solid-state drives (SSDs), uninterruptable power supplies (UPS), and networking switches and routers, as well as peripherals such as GPU graphics cards, wireless chargers, and printers. These require the use of semiconductors and passive components manufactured by Vishay such as diodes and rectifiers, MOSFETs, power ICs, optoelectronic products, resistors, inductors, and capacitors.
Computer

Switch Mode Power Supply

Vishay Components Used

  • Power MOSFETS
  • Controller ICs
  • Optocouplers
  • Schottky Diodes/Rectifiers
  • Ultrafast Rectifiers
  • TVS
  • Bridge Rectifiers
  • Switching Diodes
  • X/Y Capacitors
  • Aluminum Electrolytic Capacitors
  • High-Voltage Resistors
  • NTC and PTC Thermistors
  • Inductors/EMI Filters
  • Secondary Protection Fuses
EMI-Filter Reverse Polarity Protection SMPS Buck Converter Transient Protection ESD-Protection Filter Pull-Up / Down Resistor Position Sensor DC Link Current Sensor EMI-Filter Low Side Current Sensor Motor Switch Reverse Polarity Protection Transient Protection Position Sensor Temperature Sensor
EMI Filter Reverse Polarity Protection Security Switch Transient Protection SMPS Buck Converter EMI Filter Reverse Polarity Protection Security Switch Transient Protection Buffer Capacitor High Side Current Sensor High Side Switch Low Side Current Sensor Low Side Switch Storage Inductor
EMI Filter Reverse Polarity Protection Transient Protection SMPS Converter Low and High Side Switch High Side Switch Low Side Switch Buffer Capacitor Storage Inductor High Side Current Sensor LED Light Sensor Current Sensor
SMPS Converter EMI Filter Reverse Polarity Protection Transient Protection Filter ESD-Protection Pull-Up / Down Resistor Level Shift Motor Switch DC Link Current Sensor Low Side Current Sensor EMI Filter Reverse Polarity Protection Transient Protection BLDC-Motor WiFi GPS Receiver Proximity Sensor
SMPS Converter EMI Filter Reverse Polarity Protection Transient Protection ESD-Protection Filter Pull-Up / Down Resistor Buck Boost Converter EMI Filter Reverse Polarity Protection Transient Protection RGBW Sensor Blue Light Sensor Position Sensor Current Sensor
SMPS Buck Converter Reverse Polarity Protection Transient Protection Optical Smoke Detection Temperature Sensing Amplification ESD Protection Audio Amplifier Flashlight Wireless Ethernet

Switch Mode Power Supply (SMPS) applications generally involve power adaptors, desktop power, or server power. SMPS design is separated into primary and secondary sections due to isolation topology. The primary section involves EMI filtering, input rectification, and power factor correction (PFC) devices. The most important design concept is PFC to improve efficiency. Good performance of a PFC rectifier enables the power supply to operate efficiently under a light current load. Ultra-fast recovery time of the rectifier and low Qg of the switching MOSFET are the most important factors associated with PFC. No matter what kind of topology is involved, PFC is the key not only to increasing efficiency, but also to improving thermal performance, especially for 80-plus SMPS. For EMI, film capacitors and ceramic disc capacitors are good for X-capacitor and Y-capacitor design, respectively. Regarding input rectifier devices, single-phase bridge rectifiers are the best solution, especially for power adaptors. The secondary section includes output rectifiers and filters. Trench MOS Schottky technology is a new technology that can replace planar technology as a non-synchronous rectifier solution. Its key feature is ultra-low forward voltage, or Vf. Trench MOS Schottky rectifiers work well as output rectifiers, especially in multi-output systems. In addition to providing good forward voltage performance at high ambient temperature, they also feature high current handling and voltage (up to 150 V) capabilities. Different solutions are based on different specifications.

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