Power management

Hi Sir/Ma'am, I have a question about the STEVAL-CTM009V1 board. Explanation: Currently, I am using the STEVAL-CTM009V1 evaluation kit for my motor control application. I have connected the necessary power supplies(48V and 12V) and all 4 RED LEDs are ON. I applied 6 PWMs and tested that I could see the PWMs at the input of the gate driver and also there is a 3.3 V available at SD&OD pin. But I am not receiving any output other than small spikes at the low sides output and LOW at high sides output.  Questions: what could be the possible reason behind this?

Following on from Solved: Cannot connect STWBC86 to WPSTUDIO V1.8.4 - STMicroelectronics CommunityI am still getting the "Unable to find an [TX]WBC86 device"' message when' I try to connect.Originally the log file just showed the 'Failure to load DLL' messageI  installed all the Visual C++ redistributable versions (2005/2008/2010/2012/2013/2015, x86 and x64) as suggestedThe log file now shows read/write errors when trying to contact the boardI made a capture of the I2C bus on the board which is below, followed by the WPSTUDIO (v 2.2.5)  log file

The datasheet (and eval board) for the STUSB4710 show the device paired to a buck converter using a >22V supply for this USB C power source IC. I would like to drive the 4710 with 14V (automotive application) and be able to still get the full range of USB C power out of it (5V to 20V). Is there an ST buck boost converter that would be able to interface to the feedback pin of the 4710? Would I be better off to boost my 14V to >22V then just use the referenced buck converter?https://www.st.com/en/interfaces-and-transceivers/stusb4710.html#tools-softwarehttps://www.st.com/en/evaluation-tools/steval-isc004v1.html 

dear ST: Why STSVAL-L99615C- can_not_connec to_GUI?I can use tera toem connect to ST, But could not connect to GUI ?I attached a ppt to descript this situation;My email: 51296211@qq.com

Dear ST:  When I download STEVAL-L99615C Software GUI,  en.en.stsw-l9915c.zip,L9961_Script.7z Only contain one file: Current acquisition init.csvanother important file is missing: Voltage Acquisition Init - 5Cell + VB + NTC.csv ? could you fix this problem ? also send a copy to my email: 51296211@qq.com?Thanks!

Hi,I can't find information in datasheet of TSC2020 how to connect reference voltage.https://www.st.com/en/amplifiers-and-comparators/tsc2020.htmlIn the componnet are two REF pin. This pins are shorted together or I can use two precise resistors to adjust the reference poiont? If I will use extenal ref voltage, where I should connect it?Thank you in advance for your answer.   

I'm trying to use STPM32 with XZM-CT50A01, and the series resistor = 6.2 ohm. I thought ks = Rb/N = 6.2/1000. But I cannot measure the expected current.The load was 50mA but STPM32 respond 1.2A.The software may be OK because we have confirmed with EVALSTPM33.I'd like to know the Ks setting is correct or not. Maybe our board has already damaged, or the board has cold soldering??Can you advise me if the Ks calculation is correct?  

Hello,I'm developing a buck converter exactly like the schematic below. The only difference is the STTHL06 (D2) diode in the feedback loop. In my case, I'm using an ES1J diode, which has a 35ns recovery time. My problem is the output voltage, which shows a lot of ripple when I use the ES1J, but when I replace the ES1J with an RS1M, which has a 500ns recovery time, the problem disappears. Why does this happen? I appreciate any help.  

Hi ST-Communitydoes anyone know what the off-impedance of the DIAG pin is when the chip is not powered or UVLO? There is a grey resistor to GND in the "Figure 1. Block diagram" with no description. The datasheet also states a max. leakage current in "Table 8. Protection and diagnostic". (330k?). In the truth table is only an "X" but no comment about the values. Any ideas? Thanks for helpFelix

Hello there, I am planning to design an environmental IoT sensor node and i would like to incorporate the SPV1050 IC since it covers my project needs. I did extensive reading of the datasheet and there are some things I would like to get cleared:1. does the dc-dc converter have a dedicated bus for BATT charging?2. if no (probably that's the case as I understood) what happens if there is a load connected to the store pin like an mcu, under voltage is triggered and pass element get open, how the battery is going to charge. what happens if voltage at the pin never manages to trigger over-voltage threshold for the pass transistor to close and charge the battery. That could happen because of the load consuming Cstore. Is there something I am missing about the battery charging system. Kind RegardsPatsaoglo

Hello, I have an issue with the L6699. The controller initiates the start-up sequence but after a few pulses it stops permanently.I describe the application first:Vin=385VVout=39 to 60 VTransformer magnetization inductance Lm=127uHResonant tank inductor: 42uHResonant tank capacitor: 60nFThe programming of the IC is as follows:RFmin 8.5kCF 330pFRss 15.3kUsing internal bootstrap circuitryThis gives an startup frequency of around 200kHz and a minimum frequency of 75kHz. Once the LINE input is set, the controller does correctly the first LVG pulse of 10us, waits around 50us as expected and innitiates the switching, but after a few cycles, something goes wrong and a transition of the LVG from ON to OFF does not occur at the expected time. The next cycle the switching is permanently stopped.

Dear Community,I was desinged a SMPS for my circuit which belowed picture. Its working on 110V AC and not any problem. But when I connect it to 220V AC output voltage is going down slowly and about 1 minute later its go to shutdown. I can not find any solution. Pls urgent help   

We are using Part.no: L9396 for Wheel Speed Sensor circuit Designing and we chosen the same part , in  that referred some documents for designing .which is provided on online and STMicroelectronics  website. But we need some more  clarity to designing the Schematics . In the IC ,there are some Buck controller, LDO, VCORE Regulators are shown in application diagram. For us we only chosen for WSS desired pins for our application , here we need a clarity what are the regulator circuits need to design .Which is support for WSS schematic designing.

I'd like to use L9963E to measure the AC impedance of the battery at 1 kHz. It requires applying 100 mA current at 1 kHz to the battery and measuring the voltage at 1 kHz, probably with 10 kSample/second or more.  Is it possible? Or should I use another product?

Hello There! I have bought EVAL- SCS001V1 sink device for my application in which I need the output as 12V/2A from the mentioned sink device. I came across below problems and I seek help on it. 1) Problem related to STSW-STUSB002 GUI version 2.0. The first problem is with the GUI version 2.0 as specified. When I made hardware connections as mentioned in the quick start document and I tried to connect the Nucleo- F072RB with the GUI 2.0, I got an error which says " The Parameter is Incorrect". and I'm unable to connect the hardware with the GUI 2.0. I have resolved this issue by using the previous version ( STSW-STUSB002 GUI 1.09 ). So my hardware got detected in this version and I was able to program or write the NVM successfully. In the Connection Status of the GUI 1.09 it showed that " OK STUSB4500_L  Detected (COM19), at address 0x28 (I2C bus 1)" sharing image below.

Hello!Does anybody happen to know that of the shelf transformer would be fitting for a 65W isolated AC/DC flyback converter based on VIPERGAN65 ? I can not find any recomenndation in the documentation of the EVLVIPGAN65PD evaluation board.I would also like to know the total footprint of such an application.The EVLVIPGAN65PD consists of three boards and includes a USB driver with a total footprint based on the gerber data of: 23.1 mm x 35.2 mm + 69.2 mm x 35.4 mm + 23.1 mm x 30.1 mm summing up to aproxx 40 cm^2. Thank you for your help in advance! 

Hello Team,  We want to use your EVALSTDRIVE101 kit to drive our BLDC motor in sensored and sensorless mode. As given in the overview this board can be integrated with any STM32 microcontroller but can you suggest which STM32 board we can buy so that we can directly plug in into the connector provided on kit? we want to avoid using jumper wire for making connection between driver and controller.Is there any document  where connection of  EVALSTDRIVE101 with STM32 is mention or any example for reference. And one more thing though it is written it can operate in both sensored and sensorless mode but want to confirm again.Sensorless mode will operate using back emf input right? Regards,Sayali

Hello,I have a board with an ST component in SMB housing (a diode?) marked BL6, next line GP 733. What part number could this be?

Hello, I checked the L9961 datasheet for information on the cell voltage protection function, but couldn't find the operating voltage.  Other products usually provide Over Voltage Protection (OVP) for cells, but in the case of L9961, only the cell measurement range is mentioned.  Could you clarify if voltage limitation needs to be set solely through I2C communication between the BMS IC and MCU chips?

Hello everybody,I need to user Viper115HS or Viper222XS vith 15V 600mA output at non isolated buck topology. I was designed my Fb pin with 130K Ohm and 11K Ohm resistors. But I can not find right Comp pin configuration. could you write capasitor and resistor configuraton for 15V 600mA output

    Good afternoon ST engineer。I'm developing a DC motor control hardware using the L9945 in H brigde mode 。But facing a problem: the datasheet haven't any description about the Mosfet Pre-driver peak drive current when using external drive resistors. Without the currunt,I can't select a right drive resistors to limte the drive current for each channel。    I will be grateful for you to tell me how much it is. thank you.

I have a circuit with pmic STPMIC1APQR and STM32MP157DAA1 processor. For reference, I take STM32MP157A-EV1.There are cases when STPMIC1APQR does not turn on every time you turn on the power (1 time out of 20-50 turns on). At the same time, the input power of 5V (VIN) is present on it, but there is no output voltage and therefore the processor does not start. When such a situation occurs, only PONKEY_N (PIN 17) helps, then pmic restarts and turns on.Please help.I am attaching a schematic and a piece of the pcb.

Hello,I have a Nucleo L476RG that I plug onto a PCB that I designed (used as a power input) and to my computer (only used for data transfert).My issue is that I would like to plug both to the Nucleo, but only use the PCB for its power supply.Moreover, I don't want the Nucleo to power the PCB nor the computer to power either of them.Could you please help me on this topic?Thanking you in advance for your consideration.Best regards,Claire

Hi there, I was unable to find any matching for this part below, some bi-directionnal TVS I presume, but "L06" returns nothing.I need your help ^^ thanks.Nicolas.

Hi, i'm trying to power an usb-c device that needs 5v 2A, with a power supply (5v 8A) that doesn't support power delivery. For doing that i tried to use the evaluation board EVAL-SCS002V1 connecting the power supply wires (+ and -) to the green connector and the usb-c one to the device to power on. The result is that only the board blu led is turning on that means "default USB current".How can i negotiate for more current? What am i doing wrong?Please help me :folded_hands:.Regards,Giacomo