I am trying to implement a half bridge topology using IR2110. My LTSPICE simulation is not behaving as it should. This is my LTSPICE Simulation for the half bridge.
I am not seeing any pulses in my low and high side. This is my simulation results:
Blue is the high side and green in the low side. I have attached my LTSPICE and the model used for ir2110. Any help will be appreciated.
Your power supply appears to be 160V. Therefore M1 needs 160V bias voltage in order to turn it On. Theoretically a resistor divider could be part of your bias network.
Remember once M1 conducts, the node just below it is at 160V, in turn affecting how much M1 remains On.
It might be easier to use Pmos for M1.
In reality mosfets are liable to damage (perforation of insulated gate) due to high voltage.
The logic input pulses need to be at least 12V - you need to turn on the lower device 1st to charge the "boot-strap" supply cap on the upper device - else the upper drive has no power and cannot turn on ...
Your power supply appears to be 160V. Therefore M1 needs 160V bias voltage in order to turn it On. Theoretically a resistor divider could be part of your bias network.
The question was essentially answered in post #2. IR2110 works well at VDD of 5V and a with slightly degraded performance at VDD of 3.3V. You need however a separate logic supply.
Regarding starting sequence, the high side will start to switch as soon the bootstrap capacitor has been charged, may be after the first low side pulse.
It's another question how to achieve safe start without load overcurrents in a real application. It may be advisable to ramp up the output duty cycle.