power supply issue in IMX283.

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power supply issue in IMX283.

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chrisyin
Contributor I

hi, everyone:

I have a power supply issue in IMX283.

Steps to Reproduce

1,use IMX283 in the design refer to<IMX28_EVK_REVD_SCH.DSN
>

2,conect the 4.2V in battery pin

3,disconnect the VDD5V pin

4,push the recovery button

5,release the recovery button

Expected Results

come into pending in step 4

recovery from pending to work in step 5

Observed Results

IMX283 power down
in step 4, the VDDIO droped to 5mV from 3.3V in step 4,

can't recovery to
work in step 5

Subject:

measure the
voltage: 3.3V on VDDIO,3.94V on VDD5V,4.2V on VDD4P2

I am thinking
that the 3.94V on VDD5V which is higher than VDDIO+0.6V lead to DCDC detected
VDD5V and switched to VDD5V. but the 5V is only drain voltage but not power
supply. so the IMX283 powerdown.

my question is:

1,where come from
the 3.94V on VDD5V and 4.2V on VDD4P2, is it right?

2, whether 3.94V
on VDD5V lead DCDC swich to VDD5V power supply by mistake?

Labels (1)
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4 Replies

822 Views
asifali
Contributor III

I think the issue is in configuration. You should check the setting from the quick start guide of board. Hope that will solve your problem...

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VladanJovanovic
NXP Employee
NXP Employee

What is the switch (S1-S7) and jumper (J94, J95) setup  on i.MX28EVK?

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jimmychan
NXP TechSupport
NXP TechSupport

This is an application note about Battery Charger. Maybe useful for you.

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jimmychan
NXP TechSupport
NXP TechSupport

Is it work normally if you connect the 5V power supply ?

Do you mean :  after remove the 5V power supply, there is 3.94V still existing on VDD5V?

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