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how to test IR2108 MOSFET driver
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hussamaldean:
Hi all
is there a way to check if the IC work or not ?
because when I apply 12V to the IC and 5V to HIN and inverter one to LIN the output remains high for both mosfet
this is the circuit from datasheet

I used normal rectifier diode, 22uF 50V capacitor between Vb and Vs and 100Ohm resistor for the gate of the MOSFET

please help

regards
Andy Watson:
How are you measuring HO ? Remember that this output is relative to VS. Also, to properly function, the LO mosfet must conduct for a period such that the capacitor between Vb and Vs is charged.
hussamaldean:

--- Quote from: Andy Watson on July 29, 2018, 02:11:14 pm ---How are you measuring HO ? Remember that this output is relative to VS. Also, to properly function, the LO mosfet must conduct for a period such that the capacitor between Vb and Vs is charged.

--- End quote ---
the pin and the ground using oscilloscope
I tried the gate of the mosfet and same result
alsetalokin4017:
The "LIN" is an inverting input, right, indicated by the line above the letters?
hussamaldean:

--- Quote from: alsetalokin4017 on July 29, 2018, 06:46:12 pm ---The "LIN" is an inverting input, right, indicated by the line above the letters?


--- End quote ---
I used NAND gate to get the invert state (my NOT gate is burnt) and still no hope to get the output
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