I have 70VDC 30mA source

I need to control optoisolators to generate 70V AC signal

I can use TLP222g-2 dual isolators. to build the h bridge

I have a single PWM channel from my MCU.

Is it possible to use inverting logic CMOS (CMOS NOT) ic to inverter PWM signal and apply to the isolator control inputs which should be switched of as in h bridge configuration?

which inverting CMOS ic would be perfect for this?

Jasen is what you said?

enter image description here


You don't need an inverter, just connect the optocoupler inputs between signal and VDD instead of between signal and VSS.


simulate this circuit – Schematic created using CircuitLab Shown as LEDs these are the start of the optocouplers.

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  • \$\begingroup\$ i did not get connect the optocoupler inputs between signal and VDD \$\endgroup\$ – oppo Jun 24 at 13:24
  • \$\begingroup\$ which of those three terms is confusing you? \$\endgroup\$ – Jasen Jun 25 at 22:19
  • \$\begingroup\$ its not about the terms, I'm gonna need 2 of tlp222g-2 and how to perform your method? I have 4x Optocoupler inputs to control in order to generate AC signal \$\endgroup\$ – oppo Jun 26 at 4:12
  • \$\begingroup\$ two go up, two go down. \$\endgroup\$ – Jasen Jun 26 at 4:43
  • \$\begingroup\$ what is between mean? in "connect the optocoupler inputs between signal and VDD" signal is 5V PWM and Vdd is again 5V.... how two go up two go down here? can you show in a diagram it is hard to imagine what you have explained \$\endgroup\$ – oppo Jun 27 at 17:33

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