Is RT8223M compatible with RT8223P?

[orientalsniper]

I'm working on a 11078-SA and my 3V and 5V are not being generated by U31, I also notice my low side mosfets (Q59 and Q60) drains go short when I plug in the adapter.


I replaced RT8223M with RT8223P and replaced low side mosfets Si4172DY with APM4826K.

[ktmmotocross]

Re: Is RT8223M compatible with RT8223P?

what resistance u have on that rails?

[orientalsniper]

Re: Is RT8223M compatible with RT8223P?

On diode mode unplugged: 0.428 and 0.465 on 3D3V_PWR and 5V_PWR, but go short when I plug in the adapter, the shorts are gone once I remove the low side mosfets or wait a few minutes until the mosfets close.

Is RT8223M compatible with RT8223P? If they are, I can look for the problem elsewhere.

[SMDFlea]

Re: Is RT8223M compatible with RT8223P?

RT8223M compatible with RT8223P? They seem ok to me.

Measure the exact resistance to ground, not in diode mode

[orientalsniper]

Re: Is RT8223M compatible with RT8223P?

6.7K ohms (and rising) for 3D3V_PWR and 50K ohms (and rising) for 5V_PWR.

Both rails go short when I plug in the adapter.

So it can't be RT8223P because I tried 3 in new packaging.

[orientalsniper]

Re: Is RT8223M compatible with RT8223P?

Applying 2V to 3D3V_PWR, it's drawing about 0.50A and PCH heats up a bit, this one can't be saved right?

[Sametbey]

Re: Is RT8223M compatible with RT8223P?

U31 stb chip Do you have 8 pin 3.3v LDO and 17 pin 5v LDO voltages. Is there 13 pin 3D3V_PWR activation (Enable). It is not normal that the PCH chip draws 0,50mA when it is idle.

[ktmmotocross]

Re: Is RT8223M compatible with RT8223P?

"the shorts are gone once I remove the low side mosfets or wait a few minutes until the mosfets close."

did u apply power with low side mosfet removed?

[Sametbey]

Re: Is RT8223M compatible with RT8223P?

"the shorts are gone once I remove the low side mosfets or wait a few minutes until the mosfets close."

did u apply power with low side mosfet removed?

do not do such a thing.