About Tejas_P_R

Tejas_P_R · 2024-07-30

Hi All,We have design schematic using STM32H753BIT6 microcontroller and as of now we have cleared all EMI/EMC tests except Radiation emission. We could able to see the harmonics of 60MHz crossing the margin.We have System clock running at 480MHz, LCD...

Tejas_P_R · 2023-09-19

Hi Team,We are using LD1086DT33TR regulator to generate 3.3V output from 5V input, But the the maximum dropout voltage given in the datasheet is 1.5V.Our dropout voltage is 1.7V (5V - 3.3V =1.7V) which is exceeding the max dropout voltage of the IC m...

Tejas_P_R · 2024-07-31

No we couldn't see any changes in radiation levels after changing clock termination on USB_CLKOUT pin.We have very good Power and Ground planes below the controller and USB controller, still we are facing the issue only when USB_CLKOUT pin of USB con...

Tejas_P_R · 2024-07-30

Hi LCE,The clock SI is really good, we could monitor the proper clock in scope with rise time and fall time of 2.5ns.We tried terminating the LCD clock by connecting pulldown resistor to ground, but still we could see the radiations of 60MHz harmonic...

Tejas_P_R · 2024-07-30

Hi, We are using USB controller with 24MHz crystal and is generating 60MHz clock output (For High speed) is connected to microcontroller as input.We disabled the LCD clock still we observed the 60MHz and its harmonics peaks, after removing series res...

Tejas_P_R · 2023-09-20

Hi Peter,Thank you for the valid answer, I got confused by so many answers which made me to think in a such a way that the dropout voltage is causing the exact output. but now I got clear image.I was expecting this type of clarity on Dropout voltage....

Tejas_P_R · 2023-09-20

Hi Vincenzo,As my requirement is Output voltage should be 3.3V, But as mentioned in datasheet Maximum dropout voltage @ 1.5A load is 1.5V, So if my input is 5V my output will become 3.5 as it crosses 3.3V so I feel this may damage my circuit even if ...

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STM32H753BIT6 controller Radiation Emission issue

LD1086DT33TR Dropout voltage query

Re: STM32H753BIT6 controller Radiation Emission issue

Re: STM32H753BIT6 controller Radiation Emission issue

Re: STM32H753BIT6 controller Radiation Emission issue

Re: LD1086DT33TR Dropout voltage query

Re: LD1086DT33TR Dropout voltage query