What's your question?

volt.tech Latest Questions

vikas Nagpal
  • 0
vikas Nagpal
Asked: March 23, 2023In:
  • 0

Hii Team, Do Digital POL devices like TDA3860/ 740 devices work without a bleeder resistor on the output without affecting the operating system? Thank you for your help. Regards, Vikas

bleederdevicesInfineonpowerresistortda3860
  1. ashishgawade

    Hello@vikas, It's always recommended to use a bleeder of 100 ohms. Vout of the part has an offset of around 250mV due to a leakage in no-load condition. The 100-ohm bleeder will pull it down. If there's no issue with 250mV offset the part can be used without bleeder also. If there's a concern with eRead more

    Hellovikas Nagpal,

    It’s always recommended to use a bleeder of 100 ohms.

    Vout of the part has an offset of around 250mV due to a leakage in no-load condition.

    The 100-ohm bleeder will pull it down.

    If there’s no issue with 250mV offset the part can be used without bleeder also.

    If there’s a concern with effectiveness while using a 100-ohm bleeder also a 500-ohm bleeder can be used. 500-ohm bleeder will have an offset of 65mV.

    Regards,

    Ashish Gawade

    See less
    • 0
Julian White
  • 0
Julian White
Asked: March 21, 2023In:
  • 0

Hello, I’m working on a custom board design and we’re looking into using the STM32H7B3IIT6 or the STM32H7B3IIT6Q. The main difference I have seen between the two is the Q- version removes some of the IOs to add an SMPS. I’m trying ...Read more

mcusmpsstm32h7b3iit6stm32h7b3iit6q
  1. vikas Nagpal

    Hello, The SMPS reduces the power loss when VDD is regulated down to the core voltage with an internal LDO. The SMPS, thus, increases energy effectiveness. However, you're better off with the LDO version because you have further GPIOs and one lower coil and capacitor on the BOM, If you do not need tRead more

    Hello,

    The SMPS reduces the power loss when VDD is regulated down to the core voltage with an internal LDO. The SMPS, thus, increases energy effectiveness.

    However, you’re better off with the LDO version because you have further GPIOs and one lower coil and capacitor on the BOM, If you do not need to save every milliwatt.

    Does it answer your question?

    Regards

    See less
    • 0
ashishgawade
  • 0
ashishgawade
Asked: March 18, 2023In:
  • 0

Hii, is there a way in Arduino IDE or different IDEs that you run two other tasks with two cores of esp32 but set each core frequency else for sample core 0 is performing its task with 10 Mhz frequency ...Read more

arduinobinarycoreesp32Programming
  1. nidhi singh

    Hello Ashish, No, sorry, that kind of setup is physically impossible on current ESP chips as the two cores( and the main memory, for that matter) are in the same timer domain. Thank you  

    Hello Ashish,

    No, sorry, that kind of setup is physically impossible on current ESP chips as the two cores( and the main memory, for that matter) are in the same timer domain.

    Thank you

     

    See less
    • 0
Alex thomas
  • 0
Alex thomas
Asked: March 16, 2023In:
  • 0

Hello, I am planning to use RA2A1 MCU for a design with 24-bit ADC sampling and relay control. Because there are many 5V peripherals in this system, it’ll be much simple if the RA2A1 runs at a 5 Volt power supply. Most ...Read more

mcumicrocontrollersmicroprocessorspowerra2a1renesassupplyvolt
  1. vikas Nagpal

    Hello, None RA2 family can run from 1.6 V to 5V. The data sheet & hardware user manual that can be found on the Renesas web give further detail. Thank You

    Hello, None RA2 family can run from 1.6 V to 5V.

    The data sheet & hardware user manual that can be found on the Renesas web give further detail.

    Thank You

    See less
    • 0
nidhi singh
  • 0
nidhi singh
Asked: March 9, 2023In:
  • 0

Hello, Dear Volt Tech support team, I’m using the TLE987X chip. I already read the Application note” Infineon-TLE987x_Data_Flash_Handling- AN-v01_01- EN” I want a C programming samples code for 1. Pushing data to EEPROM 2. Fetching data from EEPROM 3. Clearing the EEPROM Thank You

chipeepromInfineontle987x
  1. Alex thomas

    Hi @nidhi, As the sample code is for TLE9879QXA40 and you're applying TLE9872QTW40 so please make the following changes- Please go to Options for Target in Keil also- 1) Go to the Device menu and add your device TLE9872QTW40 also uncheck the BF stepping to make the code compatible with your device.Read more

    Hi nidhi singh,

    As the sample code is for TLE9879QXA40 and you’re applying TLE9872QTW40 so please make the following changes-

    Please go to Options for Target in Keil also-

    1) Go to the Device menu and add your device TLE9872QTW40 also uncheck the BF stepping to make the code compatible with your device.

    Go to Debug menu-> Settings-> Flash Download and confirm if TLE9872QTW40 with 252k size is selected.

    2) Now open the config wizard, go to PMU-> Power Saving Modes, select Sleep mode, and save it.

    3) Rebuild your project and check page 0 with address 0x1103F000.

    Best Regards
    Alex Thomas

    See less
    • 0
vikas Nagpal
  • 0
vikas Nagpal
Asked: March 6, 2023In:
  • 0

Hello, After looking over all the documentation I could find (datasheet, source primer, etc.), I couldn’t easily find how I’m meant to connect IR LED (s) for Ir DA communication with an STM32WB55. The image I attached is a screenshot from ...Read more

datasheethardwareirdaledsphotodiodesstm32wb55
  1. Julian White

    Hello, IrDA has hardly been used for a long time, which is also marked in discontinued IrDA transceivers. However, since basically everything except the TIA and visual factors is included in the STM32 IrDA SIR ENDEC, it's possible to recreate IrDA with an IR LED plus driver transistor and an IR photRead more

    Hello,

    IrDA has hardly been used for a long time, which is also marked in discontinued IrDA transceivers. However, since basically everything except the TIA and visual factors is included in the STM32 IrDA SIR ENDEC, it’s possible to recreate IrDA with

    • an IR LED plus driver transistor and
    • an IR photodiode plus TIA.

    RX and TX are switched to the IrDA function so that the LED driver and TIA can be connected directly.

    Regards

    Julian White

    See less
    • 0
nidhi singh
  • 0
nidhi singh
Asked: March 3, 2023In:
  • 0

Hello, I’ve built a custom board with the ESP32-C3 and I intended to program( and debug) the ESP32-C3 only via USB. Although it seems that to program the device the actually first time I need to hold the IO9 pin low. Indeed ...Read more

boardesp32firmwareusb
  1. Julian White

    It's not required per se, but it's helpful. The issue is that an empty ESP32-C3 usually will try to boot from flash and fail. After some attempts, the RTC watchdog will protest in to reset the entire chip. This is useful as it may clear any transient error that would stop a properly flashed chip froRead more

    It’s not required per se, but it’s helpful. The issue is that an empty ESP32-C3 usually will try to boot from flash and fail. After some attempts, the RTC watchdog will protest in to reset the entire chip. This is useful as it may clear any transient error that would stop a properly flashed chip from booting. However, it also resets the USB-serial- JTAG device, causing the OS tore-enumerate it. Going into download mode (either by pulling low GPIO9 or by successfully connecting using the flashing app) stops that from passing, allowing the chip to be flashed as normal.

    Not having GPIO9 accessible will generally work (depending on how fast your OS is in detecting USB devices) but may need several tries in flashing for the timing to be right.

    Another thing is that without forcing the chip into download mode, for old performances of the esp tool, a watchdog will keep running during the flashing process, which may interrupt flashing if the firmware is fairly large. Using a newer version of the esp tool should fix that, however.)

    See less
    • 0
Alex thomas
  • 0
Alex thomas
Asked: March 1, 2023In:
  • 0

Hi, I am curious to understand that switching operations in RA2A1 MCUboot is Atomic. However, what happens if it fails during the exchange operation in MCUboot? If it isn’t atomic programming. Thanks and Appreciate for sharing your knowledge. Best regards, Alex Thomas

atomicmcubootra2a1renesasswitching
  1. nidhi singh

    Hi Alex, The exchange mode for MCU boot uses the scratch area as an intermediate area in order to complete the exchange of the 2 images. The process of switching is done like below. However, then no information is lost, If a power failure occurs. The scratch area must be large enough to store the laRead more

    Hi Alex,

    The exchange mode for MCU boot uses the scratch area as an intermediate area in order to complete the exchange of the 2 images. The process of switching is done like below. However, then no information is lost, If a power failure occurs.

    The scratch area must be large enough to store the largest sector that’s going to be shifted. For RA2 MCUs, the scratch area should be set up to 0x800 when exchange mode is used.

    Regards

    Nidhi Singh

    See less
    • 0
vikas Nagpal
  • 0
vikas Nagpal
Asked: February 24, 2023In:
  • 0

Hello Community Please help me with the formula for calculating the Number of Turns in the Primary and Secondary windings of the Low-Frequency DC to AC Inverter Transformer project. I want to design a 3KVA low-Frequency transformer. The input DC voltage is ...Read more

24vdc3kvaacdcinvertertransformervoltage
  1. Julian White

    Hi, Thank you for posting on the Volt.Tech community. Can you please share a detailed block diagram of the Inverter system? Is it the same as the below-attached block? This operation note from Infineon depicts a sample figure for a low-frequency converter. Regards, Julian  

    Hi,

    Thank you for posting on the Volt.Tech community.

    Can you please share a detailed block diagram of the Inverter system?

    Is it the same as the below-attached block?


    This operation note from Infineon depicts a sample figure for a low-frequency converter.

    Regards,

    Julian

     

    See less
    • 0