asrock70
Full Member level 4
Hello, I need place NMOSFET ON High side and control it with PWM approx. 400Hz.
Q5 switch 25V to about 8Ohm Load. In device is 50V too.
My solution
Becouse Gate to Source volatge on Q2 is allowed max +-20V.
Zener D1 subtrack 12V On 38V.
If MCU is High 3.3V Q3 and Q4 is On and Q2 is Off On G Q5 is 0V On Source 0 too.
If MCU is Low 0V Q3 and Q4 is Off and Q2 is On On G Q5 is 38V On Source 25V.
Did I miss something?
Is there any simpler solution?
Q5 switch 25V to about 8Ohm Load. In device is 50V too.
My solution
Becouse Gate to Source volatge on Q2 is allowed max +-20V.
Zener D1 subtrack 12V On 38V.
If MCU is High 3.3V Q3 and Q4 is On and Q2 is Off On G Q5 is 0V On Source 0 too.
If MCU is Low 0V Q3 and Q4 is Off and Q2 is On On G Q5 is 38V On Source 25V.
Did I miss something?
Is there any simpler solution?