EM2130L工作不起来

[Feng_Dong]

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？

[Mostafa_Intel_AE]

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]

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]

Hi @Feng_Dong ,

Thanks a lot for sharing the schematic.

Could you please unmount R222 and test again.

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

Regards,

Mostafa

[Feng_Dong]

@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]

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]

@Mostafa_Intel_AE   Hi， VDD33 pin output is 3.3V