H-Bridge Input Waverform

[Ashkar]

I have designed an N-MOS H-Bridge using an IR2110 Gate drivers and IRF540N mosfet as shown.

What I need to know is that whether the waveform to start the H_Bridge is Right.
1) I have turned the High side mosfet on using 20 kHz 50% Waveform via IR2110 Gate driver and diagonal to the High Side MOSFET I have turned the Low Side Mosfet Using the Same PWM Signal of 20KHZ at 50% duty.
Please Suggest the Appropriate waveform for diving the System.

 

[FvM]

What kind of load are you driving, what's the expected output waveform?

The intended gate waveform is not feasible with IR2110, to charge the bootstrap capacitor for Q1 gate driver, Q3 must me switched periodically.

 

[danadakk]

how to make H bridge using IR2110 and diagnose its problems

How to make H bridge using Mosfet driver IR2110 and H bridge for inverter, H bridge for dc motor control, H bridge for pure sine wave inverter

microcontrollerslab.com

https://www.infineon.com/dgdl/Infineon-HV_Floating_MOS_Gate_Drivers-ApplicationNotes-v01_00-EN.pdf?fileId=5546d4626c1f3dc3016c47de609d140a

Above might help.

Regards, Dana.

 

[Ashkar]

What kind of load are you driving, what's the expected output waveform?

The intended gate waveform is not feasible with IR2110, to charge the bootstrap capacitor for Q1 gate driver, Q3 must me switched periodically.

Could you please elaborate what ki d of waveform do I have to make in order to drive the bootstrap circuit and to control the bridge.
I am driving an inductive load ( Brushed DC motor)

 

[FvM]

• You can e.g. drive Q1 and Q3 alternatingly with 50 % duty cycle and turn Q4 permanently on. This gives an average output voltage = 50% of Vcc.

 

[Easy peasy]

Read up carefully on the UC3846 / UC3856 control IC - this will give you a lot of insights ...