fuzzzy
Full Member level 3
HI
I'm intended to use an I2C I/O expander to drive some N-Mosfet by an High side mosfet driver.
I already used PCA9555 to drive some relays by ULN2003. But when I power up my siystem, PCA9555( at startup is set as Input) puts at ON-State, for a moment, all relays.Untill MCU sets PCA9555 pins as Output.
Do you think Mosfets will be at ON-state for a moment during power-up? If it happens how can I prevent this problem?
Thanks a lot for helping me
I'm intended to use an I2C I/O expander to drive some N-Mosfet by an High side mosfet driver.
I already used PCA9555 to drive some relays by ULN2003. But when I power up my siystem, PCA9555( at startup is set as Input) puts at ON-State, for a moment, all relays.Untill MCU sets PCA9555 pins as Output.
Do you think Mosfets will be at ON-state for a moment during power-up? If it happens how can I prevent this problem?
Thanks a lot for helping me