AN6884 DATASHEET PDF
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It sounds like you’re trying to drive this circuit with a signal that includes a considerable DC bias, which explains why all of the LEDs light up right away when you remove short out the capacitor. Placing it at a higher voltage within the datasheet’s max specified V will both lower the amplification and raise the lower rail of the comparators in the block diagram.
Your description doesn’t agree with that in the datasheet. Fadecomic 2 6.
AN 데이터시트(PDF) – Panasonic Semiconductor
Per AN’d datasheetPin 8 is the signal input pin, and it’s the internal Op amp’s positive input. So it determines the DC bias of the block capacitor’s polarity. If Datwsheet remove the 2. The potentiometer is clear, but the 2.
You should fix the capitalisation of sentences and electrical units ‘F’ for farad to improve legibility and credibility. By “low side”, you’re referring to the inverting inputs of the comparators. Pin 8 accepts a positive input voltage. There’s still a much shorter range over which a varying number of LEDs come on.
Have you tried a non-polarized capacitor e. However, if that’s the case, I can’t explain why reversing the capacitor doesn’t work, unless the actual polarity of the capacitor is backwards from what you think it is.
That’s clear, because the input in my test circuit is DC. I know the correct names, but I conversely find “inverting” and “noninverting” confusing when dealing with comparators, since those terms make more sense when dealing with op-amps.
(Datasheet) AN pdf – 5-Dot LED Driver Circuit (1-page)
Per AN’d datasheet. If I “correct” the orientation, the circuit does not work at all. Email Required, but never shown.
Indeed, it must in order for any of the LEDs to turn on! How does doing anything to pin 7 or pin 8 affect that?
AN6884 Datasheet PDF
That is to say that the LEDs all come on at a much smaller turn of the potentiometer. As displayed, the LEDs go from fully off to fully on over roughly the entire turn range of the potentiometer.
There is also no discharge path with your arrangement. This circuit will light the LEDs as the input voltage on pin 8 increases relative to pin 7. It appears to be reversed. That means there is a small current flow out from the pin. Pin 8 is the signal input pin, and it’s the internal Op amp’s positive input.
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Capacitor with polarity can be used ac couple or blocking. I am looking at the test circuits on the data sheet for the AN VU meter IC, and I cannot understand the connection to pin 8 in the following diagram: Passing Vin through a reverse capacitor seems to be potentially more prone to failure. You might datasyeet to edit to explain your answer a bit more.