[SOLVED] Microcontroller and inverter

[curious_kuldeep]

i'm designing a sine inverter using pic16F877A, i'm getting the PWM signal properly , two square wave of 50 Hz and two SPWM of 1kHz, but when i feed these four signals into the MOSFET driver IR2112 , i get one output from pin 1 , not getting any signal from pin 7 after giving two inputs in pin 10 and 12 for each of the driver (two drivers in total). What can be the problem? please help me.

 

[BradtheRad]

Your H-bridge is labelled with 40 VDC power supply. To turn on gates Q1 Q3... requires greater than 40V. Does that risk perforating your insulated mosfet-gates?

Both of pin 7 must output greater than 40V, possibly 45 or 50 or 60V. Is that what you measure?

 

[curious_kuldeep]

no, here Vcc= 12V, i'm giving 12V dc power supply in the driver IR2112 , i'm getting amplified voltage of 10V in pin 1, not in pin 7 , but there should be two square or PWM signal in pin 1 and pin 7, that's the main problem here

 

[KlausST]

no, here Vcc= 12V, i'm giving 12V dc power supply in the driver IR2112 , i'm getting amplified voltage of 10V in pin 1, not in pin 7 , but there should be two square or PWM signal in pin 1 and pin 7, that's the main problem here

Sorry, but your schematic tells a totally different story.
according your schematic:
* VCC = 5V
* IR2112 supply is 18V.
* bridge supply is 40V.

Please give consistent informations.

Klaus