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EM2130L工作不起来

Feng_Dong
Beginner
3,377 Views

我使用EM2130的原理图如下,完全参照黑金开发板来的,很奇怪没有电压输出,有人能帮忙看看吗?

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Mostafa_Intel_AE
Employee
3,361 Views

Hello @Feng_Dong ,

 

Could you please share Em2130 schematic and an output voltage waveform, so I can understand the fault behavior.

 

Regards,

Mostafa

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Feng_Dong
Beginner
3,358 Views

Hi @Mostafa_Intel_AE , Thanks for your support,  I share EM2130 schematic, by the way,  1.  no output is generated  2.  PWM pin is low  3. Sync pin is Low.  Thanks

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Mostafa_Intel_AE
Employee
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Hi @Feng_Dong ,

 

Thanks a lot for sharing the schematic.

Could you please unmount R222 and test again.

Mostafa_Intel_AE_0-1631761653721.png

 

Please help to confirm the output capacitors values where this could cause stability issue.

Mostafa_Intel_AE_1-1631761820100.png

 

Regards,

Mostafa

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Feng_Dong
Beginner
3,350 Views

@Mostafa_Intel_AE   Hi, we did not mount R222(we use NC there, means not connected), EM2130L does not  have any output.  do we have to programme EM2130 before we use it? Thanks

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Mostafa_Intel_AE
Employee
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Hi @Feng_Dong ,

 

Got it.

You don't need to program the part before use it, it is already configured with a default setting.

 

Could please confirm the output capacitors values and also please help to confirm if the VDD33 pin output is 3.3V or not?

 

I am suspecting a soldering bridge underneath the package, so could you please help to share a photo for the footprint and the stencil  aperture of EM2130 for review.

 

Regards,

Mostafa

 

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Feng_Dong
Beginner
3,313 Views

@Mostafa_Intel_AE   Hi, VDD33 pin output is 3.3V

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