Inverter protection circuit – LM324 low voltage and overload protection

The Inverter protection circuit – LM324 the low voltage and overload issue controlling. free PCB layout ( suitable for using ic SG3525, Sg3524, etc. ).

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it is a very important and useful circuit board for inverter voltage detection and shutdown to protect electrical equipment.

if the battery voltage is low the buzzer starts to beep.

Inverter protection circuit diagram

inverter battery low and overload protection circuit
inverter battery low and overload protection circuit

Components required

  • LM324 ic —————————————————1
  • 22k resistor———————————————–3
  • 10k preset pot———————————————2
  • 2.2k resistor———————————————–2
  • 4.7v zener diode——————————————1
  • 10k resistor—————————————–4
  • 4.7k resistor—————————————–2
  • 100ohm resistor——————————2
  • 560-ohm resistor—————————————1
  • 1k ohm resistor ————————————-1
  • 10uf 25v capacitor———1
  • 547 transistor ——-1
  • 1n4007 diode ——1
  • piezo buzzer—–1

if the overload has to be detected on the output the circuit will turn off the ic.

inverter protection circuit. LM324 low voltage and overload inverter cut off circuit
completed circuit board

in this board, the two preset pot will allow you to adjust the low voltage and overload setting.

adjust the pot to your convenience.

if the voltage is below the required voltage then the circuit will be turned on and starts to beep.

if the battery volt is very low voltage the circuit will shut down the PWM ic.

There are three output connections are available, one is the point must go to the source of your MOSFETs, this must be the ground for the driving MOSFET

The second pin comes from the ic pin 2 this connected to the reference pin of your PWM ic. in sg3524 and sg3525, the reference pin is 16.

and the third output pin that connects to the shutdown pin of your PWM ic.

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