Power management

我的WLC99RX开发板无法连接到GUI，我下载了wlc_ft260_Recovery这个文件，我连接了STEVALUSBI2C，但是并没有用，可不可以给我一个详细的教程。我还有一个问题是解释我的GUI界面似乎与开发板手册上的展示的不一样，GITHUB网页已经404，请问可以通过邮箱发给我与手册上展示一样的GUI软件吗，谢谢 Translation: My WLC99RX development board cannot connect to the GUI. I downloaded the file wlc_ft260_Recovery and connected to STEVALUSBI2C, but it didn't work. Can you give me a detailed tutorial?Another question is to explain that my GUI interface seems to be different from that shown in the development board manual. The GITHUB page has 404. Can you send me the same GUI software as shown in the manual via email? Thank you    

Hello,I have developed a custom board using the STPM33 to measure power consumption. The schematic is identical to the evaluation board.I can communicate with the STPM33 via SPI and have verified that the data I write is correctly stored in the device.My system is connected to my room AC outlet (with a stable voltage), and the device under test draws a steady current over time. However, when reading register 0x48 to obtain RMS voltage and  RMScurrent for channel 1, I observe that both values increase over time, even though the voltage should remain around 120V AC (If I wait 5 imn the RMS voltage is 160V).Do you have any insights into why this might be happening?Here are my register values:DSP_CR1 (0x00): 20 00 00 A0DSP_CR2 (0x02): 20 00 00 A0DSP_CR3 (0x04): 08 80 44 E0DFE_CR1 (0x18): 03 27 03 27DFE_CR2 (0x1A): 03 26 03 26All other registers are left at their default values.Thank you for your help! 

HiI have a motor contol design for a 4pole motor 4800 rpm but my control seem to be limiting the speed to 300-500rpmI have followed the app note AN1625 and using a integrator circuit. I can adjust vspeed voltage via a pot. but this does not change the speed much.I have set my Tpulse to 282us RCOFF parts are is 1nf and 33k.my integrator is a 5v signal rail with the feedback of 1meg and a 220nf cap. A 5.6k / 1.8k resistor divider on the output. which feed Vref of the L6235.what am i doing wrong. do i need to ajust my resistor network?regardsRoss    

Hi Team,We have designed our own SMPS with a charger board, which converts 230V AC to 24V DC. In this design, we used an LM2596 buck converter circuit to limit the voltage to 24V when the battery is fully charged (29.4V). However, the output voltage drops when the battery voltage goes below 24V.Our requirement is to maintain a stable 24V output with a minimum of 3A, regardless of the battery voltage fluctuations (ranging from 21V to 29.4V).We also tried using a buck-boost converter like the XL6019E1, which can boost the input voltage (e.g., 20V to 24V). However, when the battery charges above 24V, the output voltage increases, which is not desirable.Could you kindly suggest a solution to maintain a stable 24V output under these conditions?Looking forward to your guidance.Best regards,mbed egnr

Hello,I'm developing a charging solution using the STWBC86 controller - is it possible to disable the reping after a received EPT packet from the receiver device (GUI setting: TX EPT PING DIS EX EPT) only while it detects the presence of a receiving device?Currently, if reping is disabled, after receiving the EPT packet from the receiver, the transmitter will not reping until being reset or via I2C commands, regardless if the receiver is removed from the charger. The use case here would be for the receiving device to be able to terminate the power transfer and the transmitter wouldn't attempt to restart the power transfer until the receiving device is removed from the charger.

I am making a board using your WLC38RX chip.I had a problem during the experiment. When I applied a load and then disconnected it, the board rebooted.So I found a solution. When I updated the Rx f/w, the reboot did not occur.In order to find the parameter that affected it, I manually changed the config settings from the initial state without f/w update to the same as after the f/w update, but the board still rebooted.I wonder why there is a difference when the Rx registers config settings are the same.Is there an invisible setting value?The f/w used is STEVAL-WLC38RX_config_1F46_EPP.memh.

L9369 registers, its feature is CR: Clear on Read Read such register,  all 16 bits of this register will be changed to the Default status, right? 

This taype issue acoures while i downdold GUI alrady in pc Labview 2014 persent but this problem comes while instalition KIndly help in instaltion 

Hi,I am developing AC-DC flyback with HVLED815PF controller.Using application note AN4350 I managed to have a CV output for 6W max.At high load, everythings good and functioned as expected.I got 25% iTHD and 0.96 PF.However at 2W and below its suddently getting worse.After checking it out, it turns out the controller operating in burst mode and normal mode alternately.I have checked all pins and did not found anything out of the ordinary, except that COMP pin is below 1V that triggers this burst mode operation which is my questionWhat could be the reason for this? and how to mitigate this?Its too early to enter burst mode at just 30% load. 

Hi! Can you pls share the Reliability Qual Report of SH32N65DM6AG? Or, pls advise where can I find in the website. Thanks

I expect each half bridge to have protection against shoot through, that is ensuring that top and bottom drivers are not on at the same time.  I cannot find reference to this in the data sheet and would like to know to enable calculation of snubber components. 

Hi everybody, I'm designing a TP-PFC and I'm going to use MasterGaN1L for the first time to reduce the bill of materials. Does anybody have any information about this chip's simulation model? 

Posted on October 20, 2017 at 14:16Hi,I'm repairing an audio power amplifiers from a top model manufacturer like Harman-Kardon, Dynaudio, Bose from cars. And in almost all of models I faceing up with broken regulator L5973. The failure is that the voltage on the output increases to 4-5V causing a damage in connected DSP chips. This is standard application from page 9 from the ST datasheet. Input is 12V output is 3,3V.What can be a root cause of this behaviour? When I replace for new IC it is working in next coulpe of months ok and again fails.Maybe somebody had this case and could share some ideas Regards,Pawel

Hello. I have configured a circuit to drive a step motor by giving a signal from XC7S15-1FTGB196C.We are not going to do stepping control, but to continuously give an enable signal and use it as a motor. I configured the circuit as shown in the datasheet and gave a 3.3V power input.However, it does not work, and when checking OUTA1 and OUTA2 with an oscilloscope, a phenomenon was confirmed where it went down from 1.5V to 0V. Please let me know what to check. Thank you.   Signal Processing: XC7S15-1FTGB196CMotor drive: STSPIN220Motor: SMSSH5-F20-VKB9

What is the difference between Thermal Suddown and Thermal Rest?

Hello ST Team and Community,I am currently testing the IGBT STGP10M65DF2 in PSpice to verify the Eon (Turn-On Energy) and Eoff (Turn-Off Energy) parameters based on the datasheet. My test conditions strictly follow the datasheet: Tj = 175°C, Rg = 22Ω, and all other parameters are identical to those specified. I calculated Eon and Eoff using IEC 60747-9, but my simulation results show that Eon is smaller than the datasheet value, while Eoff is larger. Additionally, my results closely resemble those obtained under high stray inductance conditions, even though my setup follows the datasheet parameters.  My Questions:1. Could there be an issue with the datasheet values for Eon and Eoff?2. What standard/methodology does ST use to calculate Eon and Eoff in the datasheet?3. Does the Eoff calculation in the datasheet explicitly consider tail current?I would really appreciate any insights from the ST team or experienced community members. Please let me know if you need any additi

Hello Everyone, I am working on T-type PFC and I refer STSW-PFCBIDIR. May I know the reference for phase lock loop in STSW-PFCBIDIR 

Hello, I'm developing a wireless charger based on the STEVAL-STWBC86TX. When designing a new PCB based on the evaluation board, would it be possible to use the I2C converter of the STEVAL-STWBC86TX by removing the jumpers in order to program the new PCB?

I am using STGIB30M60TS-L for my BLDC motor control. But when  i am turning the motor ON , the current is increasing continuously resulting in overcurrent error. I am unable to find out where the error is present .How to find it out . I am using TSV994 for current feedback sensing.  

On the STEL12H24, but am not sure about the calculation for Rbleed:I am designing a 12V system.RBLEED [kΩ] = VIN / 20 – Rb (min)Rb would be about 95Ω (from Figure 14 in the datasheet)That would make Rbleed 12/(20-95) = -160Ω (negative makes no sense)But according to Table 2, Rbleed is minimum of 560?Can you clarify this please?

Hello. I need help to identify this ST component. I can see the ST logo top left. Text is like this from what I see:"ST      (some marking)   G CHG3      648"  

Hi Engineer, I purchased the part STPSC20065WY, and I found the pins of STPSC20065WY are oxidized with rust stains and have scratches. Could you suggest whether this is normal, and they are good to use?   Thanks a lot, Suri

One of our project we are using L9369-tr IC and we are trying to communicate with the IC using TC38X controller with SPI protocol. We are able to send the data but IC is always giving 0x8efffff6 data as a response and it is not valid data.   Could you please provide the solutions for that.   Note: IC of RST(EN_EL) and WAU pins are High. and it is not in sleep mode.  

Can I find the manufacture year from the bulk ID? Most of ST parts only indicate the last digit of the year, sometimes we just don't know it is 2013 or 2023. 

Hi, we are using L7987L IC top generate -15V from 24V input. However, we see repetitive failure in the IC. I have attached the waveform also (Green- Input Voltage, Pink- Vout). I am also sharing the layout for the same. Switching frequency we have kept around 470 kHz.