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questions on a schematic

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redgear:


The above schematic shows pin 24(VSP) as shorted with pin 23(VSYS4) and pin 22(VSYS3). Is that correct?
In the other side, only capacitor CP12 is shown as a polarized capacitor but the other capacitors also seem to use the naming convention as a polarized capacitor(CPxx). Is that a mistake or all capacitors polarized?

Thanks

PA0PBZ:

--- Quote from: redgear on November 05, 2019, 07:40:57 am --- (Attachment Link)

The above schematic shows pin 24(VSP) as shorted with pin 23(VSYS4) and pin 22(VSYS3). Is that correct?

--- End quote ---

No, they are just crossing on the diagram.


--- Quote ---In the other side, only capacitor CP12 is shown as a polarized capacitor but the other capacitors also seem to use the naming convention as a polarized capacitor(CPxx). Is that a mistake or all capacitors polarized?

--- End quote ---

They should all be polarized.

magic:

--- Quote from: redgear on November 05, 2019, 07:40:57 am ---The above schematic shows pin 24(VSP) as shorted with pin 23(VSYS4) and pin 22(VSYS3). Is that correct?
--- End quote ---
By usual convention, if there is no dot where the lines intersect, they aren't connected. Although it doesn't preclude mistakes or people trying to be creative.
I would say that VSN and VSP are each connected only to one capacitor and VSYS3 and VSYS4 are separate too.
What is this device supposed to be and do?


--- Quote from: redgear on November 05, 2019, 07:40:57 am ---In the other side, only capacitor CP12 is shown as a polarized capacitor but the other capacitors also seem to use the naming convention as a polarized capacitor(CPxx). Is that a mistake or all capacitors polarized?

--- End quote ---
Perhaps a mistake, perhaps they meant an MLCC. I'm not sure what's the state of the art but 22µF/25V isn't far from values I know are possible.

redgear:

--- Quote from: PA0PBZ on November 05, 2019, 08:11:51 am ---No, they are just crossing on the diagram.
They should all be polarized.

--- End quote ---
Thanks...
There are more capacitors with a unpolarized symbol having the name CPxx. Should they all be polarized? I am attaching the entire circuit below.


--- Quote from: magic on November 05, 2019, 08:17:44 am ---By usual convention, if there is no dot where the lines intersect, they aren't connected. Although it doesn't preclude mistakes or people trying to be creative.
I would say that VSN and VSP are each connected only to one capacitor and VSYS3 and VSYS4 are separate too.
What is this device supposed to be and do?

--- End quote ---
This a Powerbank SOC. It identifies and controls the fast charging protocols. The name of the IC is IP5328P



JackJones:
It isn't very clearly drawn, but there is another example schematic right at the top of the datasheet. On that it seems all the VSYS pins and VSP are connected together.

The VSYS pins are commoned in the example you posted as well, they are just using a global label to do so. So not very clearly drawn again.

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