Fig. 5: Internal Circuit Diagram of IR2110 Gate Driver IC
When the output from SR latch (on high side) is low then a bubble at output convert this to high and this makes the MOSFET Q1 ON and MOSFET Q2 OFF. This gives high output at HO pin. Whenever the SR latch gives low then it turns ON the MOSFET Q2 and turns OFF the MOSFET Q1 and a low is obtained at LO pin.
Fig. 6: Graph showing Output Waveform at Ho Pin
Fig. 7: Graph showing Output Waveform at Lo Pin
From the voltage waveforms observed on CRO, it can be seen that it has the same amplitude and frequency as of the input square wave. So, the IR2110 IC under test is working properly. It can now be used as a gate driver circuit for Half bridge or full H-bridge circuit without doubt.
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