- Joined Apr 21, 2022
what device can i used other than Zener diode for constant voltage and provide a path for excess current to ground
iot based project i need a 10v supply constant to make my LDO on . but whenever i increase the current nearly about 130amp then my zener is burn in that case i need same switching circuit that can provide a path for excess currentWelcome to AAC.
What is your application? That will influence the answer.
Show us a schematic of the circuit you are currently using and hopefully we can guide you from there.
yes nearly about 130-140A and then the Zener diode is burn I'm using up to 18w Zener diode still it happen i need some switching circuit in between capacitor and Zener like a switch have any idea about thanHow long will it have to shunt 130A?
ok I will try this thanks for the suggestion .what you think about mosfet as a switch in between capacitor and zener?What is your source voltage? The power you have to dissipate is 140A x (Source voltage - 10V)
One thing you WILL need is a heatsink, and it won't be a small heatsink.
Even if your source voltage is only 12V, you will still need to dissipate 280W, and that need a heatsink rated at 0.17°C/W, so you will probably also need a fan.
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