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nidhi singh
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nidhi singh
Asked: August 28, 2023In:
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Hi, I need help with the PDO2 output in STUSB4500. In spite of setting the PDO Number as 3 and configuring the PDO2 voltage and current values using the STSW- STUSB002 GUI, I can not get any voltage output at PDO2. ...Read more

Hi,

I need help with the PDO2 output in STUSB4500. In spite of setting the PDO Number as 3 and configuring the PDO2 voltage and current values using the STSW- STUSB002 GUI, I can not get any voltage output at PDO2. The status LED is also not glowing. But PDO1 and PDO3 are working OK.

However, I get the PDO2 voltage output, If I change the PDO Number to 2 with the same voltage and current configurations as over. The status LED also glows. So, this isn’t the problem of Source Matching. I’m unable to find out the reason why this is passing and how can I make all the 3 PDOs work easily.

Is there anything that I’m missing in making all the 3 PDOs work together?

Thank You

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ledpdo1pdo2pdo3pdosstusb002stusb4500voltage
  1. ashishgawade

    Hello I assume that you're using our STEVAL_ISC005V1 board and what you call 'PDO1' is Vsnk from the schematic. However, Vsnk lights are on for all PDOs selections. Whereas PDO2 is ON if PDO2 is selected and PDO3 if PDO3 is selected. Our algorithm always tries to select the highest voltage. If the cRead more

    Hello

    I assume that you’re using our STEVAL_ISC005V1 board and what you call ‘PDO1’ is Vsnk from the schematic.

    However, Vsnk lights are on for all PDOs selections. Whereas PDO2 is ON if PDO2 is selected and PDO3 if PDO3 is selected.

    Our algorithm always tries to select the highest voltage. If the charger is so that PDO3 can be selected, then PDO3 Vsink will light on,

    However, also PDO2 Vsnk will light ON. If the charger is smaller.

    Best regards

    Ashish Gawade

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nidhi singh
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nidhi singh
Asked: May 27, 2023In:
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Hello All, I’ve designed a very smooth and low ripple 5V force for my board. This gets coupled through an LDO 3.3 V controller to feed the ESP32 (same as most boards out there). When the ESP32 transmits WiFi, I see ...Read more

Hello All,

I’ve designed a very smooth and low ripple 5V force for my board. This gets coupled through an LDO 3.3 V controller to feed the ESP32 (same as most boards out there). When the ESP32 transmits WiFi, I see a 50- 100mV drop in the 3.3 V rail and it’s being coupled through to the 5V side of the 3.3 V reg.
Large electrolytic caps on the 5V side and the 3.3 V side bettered it greatly (to the 50- 100mV measured result) but I would like to see further improvements.

Most 3.3 V LDO regs all appear to have the same/similar load regulation characteristics so I’m not yet convinced a change in reg will resolve the issue. Having a 16-bit ADC on board means I’m very sensitive to voltage changes on the 5V rail.

Has anyone overcome this issue already?

Thanks

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controlleresp32ldoregulationtransmitsvoltagewifi
  1. Alex thomas

    It will not. Note that the 3.3 V LDO doesn't" regulate" its input voltage. The drop you see on the 5V side is the result of the ESP drawing more current during TX and the 5V supply/ rail failing to a) give that amount of current while maintaining 5V, or b) react to the change in current quickly enouRead more

    It will not. Note that the 3.3 V LDO doesn’t” regulate” its input voltage. The drop you see on the 5V side is the result of the ESP drawing more current during TX and the 5V supply/ rail failing to a) give that amount of current while maintaining 5V, or b) react to the change in current quickly enough. There is nothing the LDO can do to change the current the load draws from the force.

    So some options are
    a) beef up the power supply
    b) (further) reduce the impedance of the power supply (i.e. further caps), and make sure supply and ground/ return lines and connections have low resistance
    c) consider decoupling only the sensitive circuitry (ADC,.) from the 5V supply, which may be easier to achieve (less current) than stabilizing the whole 5V rail.

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vikas Nagpal
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vikas Nagpal
Asked: February 24, 2023In:
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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

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 24VDC, the Output AC voltage is 230 and the AC voltage power is 3KVA.

Please let me hear from you

Thanks

Vikas Nagpal

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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

     

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ashishgawade
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ashishgawade
Asked: November 15, 2022In:
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Hello, What should be the voltage across VBAT and VBAT- of the M4Z32- BR00SH1 battery at the moment of purchase? However, can it be recharged? If it’s zero at the time of purchase. Thank You

Hello, What should be the voltage across VBAT and VBAT- of the M4Z32- BR00SH1 battery at the moment of purchase? However, can it be recharged?

If it’s zero at the time of purchase.

Thank You

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batterybr00sh1m4z32vbatvoltage
  1. Alex thomas

    Welcome, to the community! The voltage between both terminals should be nominally 2.8 V, below 2.0 V it should be considered discharged. The battery is based on lithium carbon monofluoride chemistry and isn't rechargeable. Does it answer your question? Regards Alex  

    Welcome, to the community!

    The voltage between both terminals should be nominally 2.8 V, below 2.0 V it should be considered discharged.

    The battery is based on lithium carbon monofluoride chemistry and isn’t rechargeable.

    Does it answer your question?

    Regards

    Alex

     

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ashishgawade
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ashishgawade
Asked: September 28, 2022In:
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What I see is that the eval board output the power thru the terminal block, I’m curious how it’ll auto-select the voltage demanded. that’s no additional signal or feedback connected to the eval board. The first device can auto-select to output ...Read more

What I see is that the eval board output the power thru the terminal block, I’m curious how it’ll auto-select the voltage demanded. that’s no additional signal or feedback connected to the eval board.

The first device can auto-select to output five 5V also follow Bluetooth speaker devices, it auto-generates 15V. Let’s say I want to connect to an Uno board. which is DC 7- 15V, how will the eval output be?

I am using 20V source power)

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dc 7- 15vdevicepowerscs001v1voltage
  1. Alex thomas

    EVAL- SCS001V1 is grounded on the STUSB4500, which can store three PDO profiles( power data objects) in its NVM and informs the connected power force( source) of the voltage and current to be supplied. Since the EVAL- SCS001V1 has no information about the needed voltages and currents of the connecteRead more

    EVAL- SCS001V1 is grounded on the STUSB4500, which can store three PDO profiles( power data objects) in its NVM and informs the connected power force( source) of the voltage and current to be supplied.

    Since the EVAL- SCS001V1 has no information about the needed voltages and currents of the connected loads( sinks,e.g. your UNO), these values have to be stored in the NVM of the included STUSB4500. Programming can be done. g. with the GUI STSW- STUSB002.
    As soon as the EVAL- SCS001V1 with your UNO board is connected to the USB- C power force, the set power can be requested.

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dev krishnan
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dev krishnan
Asked: June 29, 2022In:
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I would like to know the level of Renesas RA2E1 ADC internal reference voltage. Is it fixed or adjustable? What voltage is it?

I would like to know the level of Renesas RA2E1 ADC internal reference voltage.

Is it fixed or adjustable? What voltage is it?

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adcRA2E1renesasRenesas RA2E1 ADCvoltage
  1. Support

    Hi dev , refer below link & download user manual hardware  for RA2E1 & there is table given on page 1003 for  ADC internal reference https://www.renesas.com/us/en/document/man/ra2e1-group-users-manual-hardware Thanks  

    Hi dev ,

    refer below link & download user manual hardware  for RA2E1 & there is table given on page 1003 for  ADC internal reference

    https://www.renesas.com/us/en/document/man/ra2e1-group-users-manual-hardware

    Thanks

     

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Jagmohan rawat
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Jagmohan rawat
Asked: May 27, 2022In:
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We are making 10 watt flood light with sic IC  and we are facing issue with 4kv and 440volt because if we use mov 561 then surge pass 4kv and high voltage pass only 400volt and if we use mov ...Read more

We are making 10 watt flood light with sic IC  and we are facing issue with 4kv and 440volt because if we use mov 561 then surge pass 4kv and high voltage pass only 400volt and if we use mov 621 then surge fail at 3.5kv and high voltage pass 440volt , please suggest the mov which one can use those we can achieve 4kv and 440volt pass both parameter .

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Flood lighthigh voltageledsurge passvoltage
  1. Sandeep kumar

    Hi ,   There is only issue with MOV tolerance if you use less tolerance mov or High Surge MOV your issue will be solve Thanks sandeep

    Hi ,

     

    There is only issue with MOV tolerance if you use less tolerance mov or High Surge MOV your issue will be solve

    Thanks

    sandeep

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