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Dionics-USA MOSFET Drivers


The photovoltaic MOSFET driver is a state-of-the-art, optically coupled floating power source used primarily to control MOSFETS when electrical isolation between input and output is required.

The Iso-Gate is a state-of-the-art opto-isolator incorporating Dionics photovoltaic diode arrays (PVA) and an infrared LED. The diode array is a unique I.C. consisting of series-connected photovoltaic diodes which are completely isolated from each other and from their common substrate by means of SiO2 Dielectric Isolation (DI). These photovoltaic output chips are electrically isolated from, but optically coupled to the LED.

The typical input circuit to the LED is a current limiting resistor connected in series with the LED. When activated, the LED emits infrared light toward the photovoltaic diode array, which then responds by generating an open-circuit voltage, Voc. This Voc is floating and is therefore completely isolated. The value depends on the LED input drive and load impedance.

  • Optical isolation
  • Fast turn-off time
  • Logic circuit compatibility
  • High open circuit voltage
  • High operating temperature
  • High isolation resistance
  • Self limiting gate voltage
  • Excellent input/output linearity

  • Applications:
  • Gate drive for MOS devices
  • Gate drive for SCR's
  • Solid state relays
  • Isolation amplifiers
  • Logic circuits & external load interface
  • Automatic test equipment (ATE)
  • Load control from Microprocessor I/O Ports
  • Switching equipment
  • Thermocouple open detectors
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