Hello everyone.
Please, help me to understand why D1 of the circuit below exploded when I increased the voltage to 32v. Everything was working perfectly at 22V, then I increased the voltage to 32v and D1 exploded. As you can see from the schematics, that diode drives nine N-Channel MOSFETS when they are activated through the corresponding optocouplers driven by an external controller connected to the Digital Inputs. My guess is that I have exceeded the breakdown voltage, but per specifications, it should be fine and I didn't expect that to happen.
Here are some details about the used components:
Here is the Zener diode I have used:
https://datasheet.lcsc.com/lcsc/1810122016_MDD-Microdiode-Electronics-BZT52C12_C173429.pdf
And here is the N-Channel Mosfet I have used:
https://datasheet.lcsc.com/lcsc/1811141141_HL-Haolin-Elec-5N04_C237240.pdf
The max voltage the circuit should be able to support is max 40v, even though I don't think ever go over 32v. The max current out of the MOSFETs shouldn't be over 0.5 amp each, but of course, they can be all turned on for a max total output of 4.5 amps (but I don't think that should be related to the Zener blowing up, please, correct me if I am wrong).
The circuit's purpose is to drive an array of electromagnets that can either attract (in which case P-channel MOSFETs are used) or repel (in which case N-channel MOSFETs are used instead).
Eager to know your thoughts, let me know if you need more information, and thank you in advance to anyone!
Please, help me to understand why D1 of the circuit below exploded when I increased the voltage to 32v. Everything was working perfectly at 22V, then I increased the voltage to 32v and D1 exploded. As you can see from the schematics, that diode drives nine N-Channel MOSFETS when they are activated through the corresponding optocouplers driven by an external controller connected to the Digital Inputs. My guess is that I have exceeded the breakdown voltage, but per specifications, it should be fine and I didn't expect that to happen.
Here are some details about the used components:
Here is the Zener diode I have used:
https://datasheet.lcsc.com/lcsc/1810122016_MDD-Microdiode-Electronics-BZT52C12_C173429.pdf
And here is the N-Channel Mosfet I have used:
https://datasheet.lcsc.com/lcsc/1811141141_HL-Haolin-Elec-5N04_C237240.pdf
The max voltage the circuit should be able to support is max 40v, even though I don't think ever go over 32v. The max current out of the MOSFETs shouldn't be over 0.5 amp each, but of course, they can be all turned on for a max total output of 4.5 amps (but I don't think that should be related to the Zener blowing up, please, correct me if I am wrong).
The circuit's purpose is to drive an array of electromagnets that can either attract (in which case P-channel MOSFETs are used) or repel (in which case N-channel MOSFETs are used instead).
Eager to know your thoughts, let me know if you need more information, and thank you in advance to anyone!