Friday, 1 June 2018

Totem pole opto-isolator TLP152 won't work as intended


I've been working on this very confusing problem regarding making a TLP152 opto-isolator to work as intended. Here is my circuit using a TLP152 to work as a IGBT gate driver. TLP152 circuit diagram



TLP152 circuit


No matter which way I try, i can't just have any signal at TLP152 output (pin 5). Ways I have tried: using signals ranging from 100 Hz to 50 kHz at 5V peak voltage, leave the LED of TLP152 on (no pwm signal), change TLP152's LED input resistor from 330 Ohm to 220 Ohm. Do you guys have any suggestion on how to make this thing work.


P.S: I have made a similiar circuit using TLP250 and it works, while using TLP152 won't.




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