AC square wave constant voltage

hi friends,

Do you have an idea or circuit for "AC square wave constant voltage generator" with short circuit protection ?
The spec:
1. The square wave output is 24v 200mA.
2. Max load's resistance is 8000 ohm
3. When the load's resistance is decreased,the current will drop to a value but the voltage always keep 24v.
I have no idea how to keep 24v.

The frequency must be fixed between 100hZ and 100khZ.

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  • This is not a hardware forum.

    Anyway: When the loads resistance is decreased, the current will not drop - it will increase until you reach your rated maximum of 200mA. Then you will have to either shut off the output, or drop the voltage (current regulation) or let the generator burn to cinders.

    Your specification only specify "with short circuit protection" so it isn't obvious if it should decrease the voltage or just disconnect the load.

    Don't you mean that the frequency must be variable between 100Hz and 100kHz?

    Further: You call it a "AC square wave constant voltage generator". Does that mean that it should generate +/- 24V (or maybe +/- 12V), i.e. that it should switch polarity? Switching between 0V and +24V is not AC. It is just pulsed DC.

    Finaly: you require 200mA output, but specify max load 8000 ohm. Max load is expected to be the lowest resistance that may be used. 24V / 8000 ohm means 3mA which is way less than 200mA. Did you really mean that the max load should be 8000 ohm or did you mean that the minimum load is 8000 ohm, i.e. that the load may vary between 120 ohm and 8000 ohm?

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  • This is not a hardware forum.

    Anyway: When the loads resistance is decreased, the current will not drop - it will increase until you reach your rated maximum of 200mA. Then you will have to either shut off the output, or drop the voltage (current regulation) or let the generator burn to cinders.

    Your specification only specify "with short circuit protection" so it isn't obvious if it should decrease the voltage or just disconnect the load.

    Don't you mean that the frequency must be variable between 100Hz and 100kHz?

    Further: You call it a "AC square wave constant voltage generator". Does that mean that it should generate +/- 24V (or maybe +/- 12V), i.e. that it should switch polarity? Switching between 0V and +24V is not AC. It is just pulsed DC.

    Finaly: you require 200mA output, but specify max load 8000 ohm. Max load is expected to be the lowest resistance that may be used. 24V / 8000 ohm means 3mA which is way less than 200mA. Did you really mean that the max load should be 8000 ohm or did you mean that the minimum load is 8000 ohm, i.e. that the load may vary between 120 ohm and 8000 ohm?

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