timi
Junior Member level 2
Hi Guys.
recently i am making a SSR controlled by micro.
i build it using a tc4427 and 2 irlr2905 the output from tc4427 is ok without load on the mosfets. when load is connected "light bulb" i have a very oscillating switch off. on switch on its ok.
attached are the schematics and oscilloscope print screen.
Please can any one help out.
PS. IN the PCB the mosfet are close together with tc4427 also. the power source for the bulb is a laptop adapter of 15V. on one screen shot i used 5V to drive the tc4427 on the last one 12Volt.
Timi.
recently i am making a SSR controlled by micro.
i build it using a tc4427 and 2 irlr2905 the output from tc4427 is ok without load on the mosfets. when load is connected "light bulb" i have a very oscillating switch off. on switch on its ok.
attached are the schematics and oscilloscope print screen.
Please can any one help out.
PS. IN the PCB the mosfet are close together with tc4427 also. the power source for the bulb is a laptop adapter of 15V. on one screen shot i used 5V to drive the tc4427 on the last one 12Volt.
Timi.