Optically Isolated Gate Drive Circuit - the CPC1590 from Clare

The CPC1590 is a MOSFET Gate Driver that requires no external power supply: it regulates the MOSFET voltage, up to 200V, down to 12.2V for internal use. It is specifically designed for low duty cycle switching frequencies that drive 4nF of gate capacitance.

The CPC1590 accomplishes very fast MOSFET turn-on by supplying stored charge, from an external capacitor, to the MOSFET gate when input control current is applied to the device's LED. After the MOSFET is turned on, photocurrent from the input optocoupler keeps it on for as long as sufficient input control current flows, so there is no low-frequency operating limit. When the MOSFET is turned off, the storage capacitor charges from the device's regulated internal voltage in preparation for the next turn-on.

The CPC1590 provides a flexible design solution that consumes the least amount of PCB land area

Features

  • Drives External Power MOSFET
  • Low LED Current (2.5mA)
  • Requires No External Power Supply
  • Load Voltages up to 200V
  • High Reliability
  • Small 8-pin Surface Mount Flatpack Package
  • Machine Insertable, Wave Solderable
  • Tape and Reel Version Available
  • 3750Vrms Input-to-Output Isolation

Applications

  • Industrial Controls
  • Instrumentation
  • Medical Equipment Isolation
  • Electronic Switching
  • I/O Subsystems
  • Appliances

Pricing and Availability
The CPC1590 optical gate driver is in full production with a leadtime of 5 weeks. For OEM quantities of 10KU, CPC1590 pricing is $0.66.

For further information please download the CPC1590 datasheet and application note or contact us.