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Feng_Dong
Beginner
240 Views

EM2130L工作不起来

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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6 Replies
Mostafa_Intel_AE
Employee
224 Views

Hello @Feng_Dong ,

 

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

 

Regards,

Mostafa

Feng_Dong
Beginner
221 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

Mostafa_Intel_AE
Employee
219 Views

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

Feng_Dong
Beginner
216 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

Mostafa_Intel_AE
Employee
189 Views

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

 

Feng_Dong
Beginner
179 Views

@Mostafa_Intel_AE   Hi, VDD33 pin output is 3.3V

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