I wanted to make a DAC (0-80 V) using a PWM input (6 kHz).

You might ask why I did not make it with a single N-MOS. The reason is, I tried a single as well. But power dissipation could be a very big problem, if I need more than 100 DAC channels in a circuit, so I decided to use C-MOS to get away from this problem. Since I need high voltage, I chose PHC2300 and built up the circuit.

The problem starts here. I tried at the beginning with 24 volts. It seems to be working. But afterwards, if I increase the voltage to 80 V, the complimentary MOSFET does not work anymore. I tried several times; it happens again and again. Do you have any idea what the reason could be?

^{simulate this circuit – Schematic created using CircuitLab}

I wanted to make a DAC (0-80 V) using a PWM input (6 kHz).

You might ask why I did not make it with a single N-MOS. The reason is, I tried a single as well. But power dissipation could be a very big problem, if I need more than 100 DAC channels in a circuit, so I decided to use C-MOS to get away from this problem. Since I need high voltage, I chose PHC2300 and built up the circuit.

The problem starts here. I tried at the beginning with 24 volts. It seems to be working. But afterwards, if I increase the voltage to 80 V, the complimentary MOSFET does not work anymore. I tried several times; it happens again and again. Do you have any idea what the reason could be?

I got a problem related the circuit below.

I wanted to make DAC (0-80V) using a pwm input (6 kHz). You might ask why I did not make it with a single n-mos. The reason for it, I used a single as well. But power dissipation could be a very big problem, if I need more than 100 DAC channel in a circuit.

So I decided to use c-mos , to get away this problem. Since I need high voltage, I chose PHC2300 and built up the circuit.

The problem starts hier. I tried at the beggining with 24 volt. it seems to be working. But afterwards, If I increase the voltage till 80V, the complimantary mosfet does not work anymore. I tried several time. İt happens againg and again.

  Do you have any idea, what the reason could be  ?

^{simulate this circuit – Schematic created using CircuitLab}

I wanted to make a DAC (0-80 V) using a PWM input (6 kHz). 

You might ask why I did not make it with a single N-MOS. The reason is, I tried a single as well. But power dissipation could be a very big problem, if I need more than 100 DAC channels in a circuit, so I decided to use C-MOS to get away from this problem. Since I need high voltage, I chose PHC2300 and built up the circuit.

The problem starts here. I tried at the beginning with 24 volts. It seems to be working. But afterwards, if I increase the voltage to 80 V, the complimentary MOSFET does not work anymore. I tried several times; it happens again and again. Do you have any idea what the reason could be?

^{simulate this circuit – Schematic created using CircuitLab}

I got a problem related the circuit below.

I wanted to make DAC (0-80V) using a pwm input (6 kHz). You might ask why I did not make it with a single n-mos. The reason for it, I used a single as well. But power dissipation could be a very big problem, if I need more than 100 DAC channel in a circuit.

So I decided to use c-mos , to get away this problem. Since I need high voltage, I chose PHC2300 and built up the circuit.

The problem starts hier. I tried at the beggining with 24 volt. it seems to be working. But afterwards, If I increase the voltage till 80V, the complimantary mosfet does not work anymore. I tried several time. İt happens againg and again.

Do you have any idea, what the reason could be ?

^{simulate this circuit – Schematic created using CircuitLab}

I got a problem related the circuit below.

I wanted to make DAC (0-80V) using a pwm input (6 kHz). You might ask why I did not make it with a single n-mos. The reason for it, I used a single as well. But power dissipation could be a very big problem, if I need more than 100 DAC channel in a circuit.

So I decided to use c-mos , to get away this problem. Since I need high voltage, I chose PHC2300 and built up the circuit.

The problem starts hier. I tried at the beggining with 24 volt. it seems to be working. But afterwards, If I increase the voltage till 80V, the complimantary mosfet does not work anymore. I tried several time. İt happens againg and again.

Do you have any idea, what the reason could be ?

^{simulate this circuit – Schematic created using CircuitLab}