Salvu
Junior Member level 1
Hello everyone
I need to include a short circuit protection for my new smps for amplifier using an IR2153 driving a couple of IRF740 in half bridge. Input voltage is 230vac. output voltage 40-0-40. Transformer is an ETD 39. Power around 500-600 watts.
I already winded a small 15mm core for this purpose and the ratio is 80:1 bifilar.
I need a simple but efficient circuit to pull down pin 3 of the IR2153 in adequate time in the event of short circuit and will latch till I reset.
My supply consists of a constant current start up circuit with 2 transistors with a current of 10mA at 10 volts. Then when the trafo starts oscillation and the auxiliary supply comes on and providing 13volts stabilised with a zener diode.
I am not sure if i should use an SCR or a mosfet for this purpose.
Any schematic will be very helpful.
regards, Salvu
I need to include a short circuit protection for my new smps for amplifier using an IR2153 driving a couple of IRF740 in half bridge. Input voltage is 230vac. output voltage 40-0-40. Transformer is an ETD 39. Power around 500-600 watts.
I already winded a small 15mm core for this purpose and the ratio is 80:1 bifilar.
I need a simple but efficient circuit to pull down pin 3 of the IR2153 in adequate time in the event of short circuit and will latch till I reset.
My supply consists of a constant current start up circuit with 2 transistors with a current of 10mA at 10 volts. Then when the trafo starts oscillation and the auxiliary supply comes on and providing 13volts stabilised with a zener diode.
I am not sure if i should use an SCR or a mosfet for this purpose.
Any schematic will be very helpful.
regards, Salvu