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Sakthivel
Level 3
Level 3
50 sign-ins 10 questions asked First like received

Hello there,

We are designing a custom carrier board based on AURIX series TC397XX256F300SBD MCU. and we are referring to the Infineon-TriBoardManual_TC3X71-UserManual-v02_01-EN schematics and following exactly the schematics. which has TLF35584QVVS1 PMIC. in that we are having few queries please help us to resolve it.

1. The datasheet we are referring for PMIC has the pin number : 34,35,36,39,43,44 is in the state of Not Connected. but in the Tri board schematics the pins are connected to different functions, either as a feedback pin or as VIN or with SW, should we follow the datasheet or the Tri board schematics? 

we are a promoted users we are referring the datasheet, which is in MYICP folder, version; - Rev. 2.0, 2017-03-16 - Is there any new version datasheet available?

2. Is there any method to find the power dissipation of PMIC? our operating temperature is -20 to 70 degrees, with the tc397XX MCU we are having #10 CAN transceivers will the PMIC is capable for that?

 

Thanks

Sakthivel 

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1 Solution
Albab_A
Moderator
Moderator
Moderator
5 likes given 50 solutions authored 100 replies posted

Hi,

1. As mentioned in the datasheet of PMIC This pin is electrically not connected internally and can be kept open/floating, connected to GND or any other signal. Consider neighboring signals for potential
failures. Consequently some of these pins are either connected as neighbouring pins for stability reason and some of them connected at ground in the schematics. Therefore the pin configuration mentioned in the PMIC datasheet is correct and you can refer it.

2. We do have a dedicated power dissipation tool at our product page. But it is for PMIC only and it is not integrated with any microcontroller. If you want to calculate power dissipation of PMIC while integrating with uC. Then you have to measure QUC current manually and put that in tool and calculate Power dissipation. Please check the tool here-https://plex.infineon.com/plexim/atv/TLF35584_Power_Dissipation_Calculator.html

 

Best Regards,

Albab

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1 Reply
Albab_A
Moderator
Moderator
Moderator
5 likes given 50 solutions authored 100 replies posted

Hi,

1. As mentioned in the datasheet of PMIC This pin is electrically not connected internally and can be kept open/floating, connected to GND or any other signal. Consider neighboring signals for potential
failures. Consequently some of these pins are either connected as neighbouring pins for stability reason and some of them connected at ground in the schematics. Therefore the pin configuration mentioned in the PMIC datasheet is correct and you can refer it.

2. We do have a dedicated power dissipation tool at our product page. But it is for PMIC only and it is not integrated with any microcontroller. If you want to calculate power dissipation of PMIC while integrating with uC. Then you have to measure QUC current manually and put that in tool and calculate Power dissipation. Please check the tool here-https://plex.infineon.com/plexim/atv/TLF35584_Power_Dissipation_Calculator.html

 

Best Regards,

Albab

0 Likes