VCC voltage issue in CYCMBR3116

[amva_3752821]

we are using cypress MBR3 IC in touch panel for home automation.

we are facing issue in VCC voltage, measured VCC voltage is 2.1V instead of 1.8V,

connected CMOD = 2.2nf and Decoupling capacitor is 0.1uF.

and how can we diagnose the IC failure.

[BragadeeshV · Accepted solution]

Hi,

Could you please share the snapshot of schematic?

What is the supply voltage at Vdd?

Do you see this issue with all your boards?

Could you please perform a system diagnostics test and post your results? The System Diagnostics status is also updated in the register map so that the host can read the test results through the I 2C interface. Refer to the CY8CMBR3xxx Registers TRM for more details.

More information on system diagnostics can be found in MBR3 capsense design guide and MBR3 datasheet

Design guide: https://www.cypress.com/file/46366/download

MBR3 datasheet : https://www.cypress.com/file/46236/download

MBR3 register trm : https://www.cypress.com/file/127221/download

Regards,

Bragadeesh