problem with ir2110


Joined Jul 9, 2011
According to their datasheet the 2110 has a pull-down resistor at the LIN input built-in. Anyway I would not leave it open when unused (floating). Use an external pull-down resistor, whatever value reasonably low but not so low to be a burden for your signal source. For example 10k.

Thread Starter


Joined Jul 30, 2012
i tried it. but when the power from the microcontroller(for pwm) goes low the output at lo is still high.also i have inserted a pull down(33k ohm) at lo ,but the problem remains. i have shown the changes in pdf in following attachment:confused:



Joined Sep 30, 2009
Depending on how fast your switching your PWM the 1k gate resistor is way too big. A gate resistor should be in the 4.7ohm to 50ohm range. If your PWM is high the gate never has time to shut off using the high ohm resistor.