Other Parts Discussed in Thread: LM3880
Hi
I have a question about start up sequence.
Should we turn on the EN pin after VCC rise up? If it so, how much delay should we set on EN pin after VCC rise up?
At our configuration of VCC and EN pin, the EN signal and VCC voltage are start up at same time. Because the EN signal is connected to the switch of VCC line.
So that,VCC rise up at same time when the EN signal turned on. We are considered to add the some RC delay to EN pin.
If we add the some delay, how can we add the delay between VCC and EN? I mean that the delay should be set between VCC and threshold of EN?
Or should we set the voltage of EN pin to zero until VCC rise up to min voltage of VCC?
Regards,
Koji Hamamoto