Power management

Can the VNL5050N3-E operate reliably with a 3.3V Input logic signal while switching a load of maximum 2A?

Hello guys  I am working on a switch mode power supply with PFC  and for the latter I have picked L4984D IC.  The reference circuit design I obtained with the help of eDesignSuite online tool.   Upon assembly of the circuit, as a safety measure , I powered it through a series bulb and straight away, things did not look promising. there were no shorts, but the voltage at the INV pin measured at 0.7v , which according to the datasheet ,told me that there was a feedback failure. After inspecting all the feedback resistors and double checking the circuit, I discovered that VCC voltage was dropping below VCCON. rectified it and then Series Bulb light up brighter than before and had a pulsating visuals( not completely dimming). did more checking and found out that the main bulk voltage was dropping to 110V , which is far too low and now the only suspect seemed to be the series bulb. before bypassing it, I did one final measurements to make sure it was safe to directly turn the circuit and th

Hello, community,I try to  develop power supply  based on VIPER35L, but  it  runs only in burst mode never reaching steady regulation. I have made almost a copy  of  STEVAL-ISA171V1, except of transformer, which was made by myself. According application note  AN4812.  What might be the culprit?  Are  transformer data  correct in it ?  I mean ratio  8:1:1. Isn’t  it too  small to power  self? Several oscilloscope  snapshots are taken.  Any advice appreciated. Bnx  

Hi,May I know the ASIl rating of L9663?If this device is functional safety complaint, Is there a safety manual existing that I can request for?

 Hi,I am working on an offline Flyback converter utilizing a UCC28C50 primary side PWM controller. Originally, the converter was configured for Constant Voltage (CV) mode using a standard TL431 and optocoupler circuit, which operated correctly.To convert this design into a Constant Current / Constant Voltage (CC/CV) supply, I replaced the TL431 with an STMicroelectronics SEA05 advanced controller on the secondary side. My implementation strictly follows the secondary-side configuration from STMicroelectronics' application note "10W offline LED driver based on VIPER27" (DN0002/AN4376).10W offline LED driver based on VIPER27 (DN0002)  Circuit Parameters and Component Values: Target Output Specifications: V_OUT = 15 V, I_OUT = 3 A (Test Target) Current Sense Resistor (R_SENSE / R16, R22): 18 mΩSEA05 Pin Configuration Components: R₁₈  = 3.75 kΩ, R₂₀ = 10 Ω,  R₅ = 10 kΩ, C₈ = 100 nF, C₁₀ = 1 nF, R₁₅ = 120 kΩ, R₇ = 10 kΩ,  R₆ = 51 kΩThe Problem: According to the SEA05's internal 50 mV curren

Hello, I’m using 6 of the STGAP3SXI as part of an IGBT 3 phase bridge driver. Each chip has its own 24V to isolated +15V and -9V switching supply (Meanwell GD2-241509) and the logic side is powered with a separate +5V supply. Everything runs normal except once in a while I get a random low signal on one of the chips on the READY pin which causes the MPU to issue a fault and shutdown.The datasheet says this is an error signal for the logic side under volt lockout, the isolated side under volt lockout, and the chip over temperature sensor. The diagram shows that the READY signal will return high after the voltages have risen above the min thresholds and chip temperature has lowered. However, the voltages from the supplies are above the UVLO thresholds on both sides and the chip temperature is nowhere close to its trip point. Also, when this occurs, the READY signal never returns high and only a total power down will reset it. Is this a noise issue locking up some function of the chip? I

I like the voltage regulator LDL212DR by sepification and want to simulate along with my other components. So need Spice model and requesting for a quick help. 

Hi there.I have been asked to look at your eval board, EVALSTPM-3PHISO. The question is, i want to use Rogowski coils, can this board accept them or do i need another product.Many thanksIan

Hello,We are investigating a recurring failure of an L7983 used in a medical device.Application:VIN ≈ 40 V VOUT = 5 V L = 68 µH Cout = 2.2 µF LCM mode Very light load conditions possibleFailure mode:5 V output lost. After removing the output inductor, LX remains shorted to GND. Resistance LX-GND ≈ 2.5 Ω. High-side MOSFET appears intact (no abnormal resistance between VIN and LX). Failure seems limited to the internal low-side MOSFET.Field observations:The failure is always preceded by a battery-related error. Batteries are often found degraded or unable to charge correctly. Similar failures have also occurred during production.Tests performed:Startup without battery. Startup with low battery conditions. Long-duration operation with low battery voltage. Heavy battery discharge during operation. Various startup sequences.No test has reproduced the failure so far.Measurements:LX peak ≈ 50 V. Undershoot down to approximately -1.7V No obvious overcurrent event detected.Questions:Have you se

HiI saw the pad dimensions for the SGT070R70HTO listed in the datasheet.But I don't know the dimensions of the parts I marked in red. So I want you to tell me that. Thank you.

Hi everyone,I’m developing an open-source project called Embedded Power Audit, a lightweight shell-based tool for inspecting power-management and thermal information on embedded Linux devices.The project has already been tested on several platforms, including: NXP i.MX6 NXP i.MX8M Plus NXP i.MX93 Raspberry Pi AMD/Xilinx Zynq I would now like to add support for STM32MP25.If anyone here has access to an STM32MP25-based board running OpenSTLinux, Yocto, or another embedded Linux distribution, I would really appreciate a very simple test:run the script and share the generated output with me.The tool is read-only and mainly inspects Linux interfaces such as: CPU frequencies and governors cpuidle states thermal zones memory information interrupts device runtime power-management settings other power-related sysfs/procfs interfaces Repository:https://github.com/br1pastore/Embedded-Power-AuditAt this stage I’m mainly interested in understanding which power-management interfa

Hey,I am having a big issue with ESD discharges and the STUSB4500. Essentially, I auto negotiate to 20V, and on ESD discharge, the STUSB shuts off VBUS_EN_SINK, while the supply continues to supply 20V. My thought is that on ESD discharge, the chip for some reason thinks it has had a disconnect event, waits for the supply to recover to 5V, but the cable has not been disconnected so continues to supply VBUS with 20V, and the STUSB then is in a hard stuck state until actual unplug and re-plug. There is no error seen, as GPIO does not pull low and is configured to show error states.I cannot find a document that exposes all of the register values, but after every shut down, the chip register state reads the same failure state. The dump is as below. # Before dischargeSTUSB4500 @ 0x28, registers 0x00..0xff 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f00: 00 00 00 00 00 00 12 00 11 20 00 63 fb 01 41 0a10: 0a 13 00 40 00 02 0c 2c 00 00 00 21 01 80 00 0020: 10 c8 5f 00 00 9c 00 02

Dear Team, We are using the ST8R00WPUR boost converter to step up the input voltage from 5 V to 12 V in one of our designs.We would like to conduct a design review of the attached circuit. Please review the design and share your feedback/comments.Additionally, we noticed that the Junction-to-Board (θJB) thermal resistance data is not provided in the datasheet. We would appreciate it if you could share the Junction-to-Board thermal resistance value, as this information will be helpful for our thermal simulation and analysis. Best RegardsAbhishek

We are studying the STDES-DABBIDIR 25 kW bidirectional DAB reference design (UM3198 Rev 2, TN1435, schematic and BOM v2.0) for a 30 kW EV charger power module. Two items in the documentation are not publicly available:1. A2H6M12W3-F: UM3198 uses two of these ACEPACK 2 half-bridge modules on the low-voltage side, but st.com has no product page or datasheet for this part. Has it been released? If not, what is the recommended production equivalent?2. Frenetic transformer, design reference 32011-04 (turns ratio 1.78, five stacked E80/38/20 cores), and the 28.6 uH auxiliary inductor: can ST share a specification or drawing, or should we request these directly from Frenetic?Thank you for any pointers.

Hello ST, I wonder if the top marking of STS10P4LLF6 is indeed 10P4L.Based on the latest datasheet (Rev 5, issued in Jan 2021), the top marking code is 10P4L.However, we received STS10P4LLF6 with “10K4L” but the date code is 2447. Could you please explain how this could happen?Best regards,

Hello Community,I would like to report another significant logic bug in the generated firmware libraries for the Vienna Rectifier project (specifically located in the Digital Power Control stack file BSP/DPC_FW_PACK/src/DPC_Loopctrl.c).The Issue:Inside the function DPC_LCT_FeedForwardCtrl(..), the firmware is supposed to evaluate whether the AC Voltage Feed-Forward task is enabled before adding the d-axis and q-axis AC feed-forward grid terms (fVd_feed_sub and fVq_feed_sub) to the current loop outputs.However, the original ST framework code erroneously checks the DC voltage feed-forward enable flag instead of the AC one.The Code Snippet:cvoid DPC_LCT_FeedForwardCtrl(DPC_LCT_CDC_t *pCDC_sub, float *pVd_ctrl_FF_sub, float *pVq_ctrl_FF_sub){ float fVd_feed_sub = pCDC_sub->fVdFeed; float fVq_feed_sub = pCDC_sub->fVqFeed; float fVd_ctrl_sub = pCDC_sub->fVdCurrentCtrl; float fVq_ctrl_sub = pCDC_sub->fVqCurrentCtrl; /* AC feedforward task */ // BUG: Checks bVDC_FF_Enable

Hello Community,I am writing to report a highly critical issue regarding the Vienna Rectifier reference project generated and downloaded via eDesignStudio / Digital Power Workbench (targeting the STM32G474 MCU).The Issue & Context:Upon downloading the automatically generated project package from the eDesignStudio platform and opening the .ioc configuration file locally, STM32CubeMX flags that the template is outdated and prompts the user to either maintain legacy libraries or migrate.The downloaded template from eDesignStudio was built with legacy STM32CubeMX V6.14.0 and STM32Cube FW_G4 V1.6.1. Modern local environments prompt for a migration to STM32Cube FW_G4 V1.6.3. The Critical Hardware/Firmware Bug:If a developer chooses the "Migrate" path to align the project with modern libraries, the automatic code generation introduces a catastrophic control bug:After completing the migration, generating the code, and flashing the MCU, HTRIM2/Timer A output generates incorrect PWM switchin

Hello!on our project that use the SPV1050, we need to charge a small LiPo battery that have a 20mA maximum charging current. Could someone help me find a good solutions for regulate the current from BATT Pin?thanks in advance,Andrea

can you advise if there is a ref design for the STWLC38?  

STSW-WPSTUDIO is not on ST.com and the links to Github dont exist anymore. How do I upload firmware on the STWBC86JR? And where can I get the firmware that needs to be uploaded? 

We are planning to use the 30 W Wireless Power Receiver IC (P/N: STWLC89JRO) in our product and would appreciate your support in providing the following information at the earliest:Technical Datasheet Design Guide / Reference Design Documents

We are a large electronics company that has been collaborating with ST for over a dozen years.We are currently designing a wireless charger for one of our automotive clients and plan to launch mass production within a few months. Unfortunately, we are unable to test the hardware we have designed because we cannot obtain the necessary STSW-WBC2STUDIO software.Please provide access to STSW-WBC2STUDIO.Thank you in advance for your prompt assistance.Best Regards

I had like to understand the recommended BMS configuration at the architecture level for both my current and future battery configurations.1. 2S buildCell monitoring Passive cell balancing Battery protection SOC / SOH estimation Battery current measurement Pack/cell voltage measurement Battery charging Temperature monitoring2. 7S build(future scalable)Same functional requirements as above Preferably using an architecture that can scale from 2S to 7S with minimum changes to the overall systemIt would be particularly helpful if you could provide, for each configuration:Recommended cell-monitor/BMS IC Recommended protection IC Recommended charger IC Recommended current/voltage measurement approach Recommended SOC/SOH approach Recommended cell-balancing method and typical balancing current Whether you would use internal or external balancing FETs/resistors Any additional ICs/components you would normally consider essentialI’m mainly looking for a practical, industry-proven architecture rat

Hello ST team,  Could you please provide the steval-wbc2tx70 & STWBC2-HP documentation.