Power management

Hey all,I'm trying to locate the datasheet of the following device:I think that it is a Zener, but I am not 100% sure.I've done the usual "Google" for the text, but I can't seem to find it.Thanks in advance.

Hi,I’m seeking advice on selecting the appropriate battery monitoring IC for a project involving a 4S LiFePO4 battery pack. My key requirements are:Accurate Cell Voltage Monitoring: I need to measure individual cell voltages in a series-connected pack.Open-Wire Detection: The system should reliably detect when a cell is physically disconnected (i.e., reading 0V or open-circuit conditions).Handling Removed Cells: The IC should continue monitoring the remaining cells accurately, even if one or more cells are removed from the stack.I initially started using precision rail-to-rail op-amps configured as differential amplifiers to measure cell voltages. However, handling floating inputs when cells are removed from the stack altogether has proven to be a non-trivial design challenge. To simplify the design, I’m considering dedicated bat

Hi can someone help me with identification a marking diode ?

Hello I have created reverse polarity but it can not work stable especially in the first work , this time I change the voltage a little bit it works :) ı cant understand. What should ı do?

Hello.I would like to request MTBF data for STUSB4700QTR at the request of the client company.I would appreciate it if you could reply.

Hi,I am trying to develop a custom USB-C based sensor accessory device for phones and tablets. Overview : 1 x USB-C male plug that will directly connect to a tablet, the accessory device will get power from the tablet, and a STM32F411 will send connected sensor data via USB 2.0 lines.1 x USB-C receptacle, that will be used to charge the tablet (with PD negotiations, up to 100W) when a PD charger is connected to it. It will also send the sensor data while it is charging the tablet. For USB-C PD negotiations I need a standalone controller that doesn't require any firmware.  I did some research and learned that I must implement a DRP to do this and I learned about STUSB1602.Question: For the male USB-C plug the CC1, and  CC2 lines are CC and VCON can I connect the CC and VCON to the CC1 and CC2 lines?Do I need the dead battery feature

Edit by ST Moderator: This post has been translated from Japanese to comply with the ST Community Terms and Conditions (§10.2).. STD10P10F6 I would like to ask a question about the following. Do you have documentation showing the location of this component in relation to the land relative to the external shape of the component?

Hello,what would happen if I have a fixed 5V output L6920D boost converter and the input voltage is 5V. Will it just pass through?Thanks

Dear Community,We are considering using the STSPIN32G4 to integrate and control the motor in our system. The primary reason for selecting it is that our battery supplies 6V-8.4V, which falls within the STSPIN32G4's 5.5V-75V range.We have a few questions regarding the EVSPIN32G4:Input Voltage LimitationWe are interested in purchasing the EVSPIN32G4 to test it out. However, we noticed that the product specifications state the input voltage range as 10V-75V, while the components appear to support down to 5.5V. We would like to understand the reasoning behind this limitation. The best case is we can directly using our battery supplies 6V-8.4V, to power the board.  Op-Amp Configuration and PA2As per our understanding, P

Hi.. Please help me with the minimum supported load current for the IC's: VNI4140K and VNS3NV04D S

How to write software code to design 2 KW fully digital AC / DC power supply by using STEVAL -1SA272v2 Evaluation board. After writing program how I can design SMPS.

The output status of A7987 chips varies from batch to batch. We purchased materials from different suppliers, and one batch will have a high pulse of about 7V after recovering from a 5V short circuit, while the other batch will have a high pulse of about 13V after recovering from a 5V short circuit. The maximum withstand voltage of the rear chip is 7V, and this 13V pulse can cause damage to the rear chip.Analysis of Failure Causes of CAN Transceiver Chip on HJ81 Circuit BoardA7987 abnormal chip, the voltage surged to around 13V when powered on after a 5V short circuit, causing the backend chip to burn out。

The register map of L9961 BMS IC is missing from the datasheet, where can i find it?

Hi,In one of my applications, I require to design isolated DC-DC converter with following features:Input: 24V (Nominal)Output: 0-150V adjustable by a controller (With the help of reference voltage)Power: 70WI've tried some designs that's generated by webench of TI. But, the loop compensation and SMPS transformer selection part is very difficult for me. And my current design with UCC2803 20W with adjustable 0-150V. Is there any solution available with ST chips? Or any EVAL board that can help me? Any suggestion regarding chip selection from ST based on my requirements? 

Is STDES-BCBIDIR source code available?Only hex can be found in web site belowhttps://www.st.com/en/embedded-software/stsw-bcbidir.html 

HiCan I ask you if is possible, using STEL12H24 eFUSE, to implement the reverse polarity protection using small components?We need to redesign an old project and We need of this feature, but we have a tiny area on the PCBCan you suggest to us other part numbers of eFUSE that support reverse polarity protection?our parameters are:Vin = 12VIout = 8A up to 85°C thanks very much

Hi, not sure if this is the right section, but: I have been given an AET-MOT-2DC70S1 motor controller board (https://www.st.com/en/evaluation-tools/aek-mot-2dc70s1.html#overview) and I'm trying to work out how to get it going. Starting simple trying to get one motor going, I can see that I need to connect the IN_A_1, IN_B_1, PWM_1 lines on JP1 I've also connected the +5v and GND lines. I've been trying to use a raspberry Pi to take the lines High/Low and use the PWM. However I'm not getting anywhere - I can get the motor turning one way if I take IN_B_1 high but not under other circumstances.  Also the documentation shows various modes of operation but two of them (see fig4 an12 in the documentation) have the same combinations of H/L on the inputs but produce different results. How do I get started with this device and work out

Hello, I am Chintan Mevada. I am an Embedded Hardware Design Trainee. I have Find IC that specification have Battery Management I²C controlled, 1-4-cell, 5-A buck-boost solar battery charger with dual-input selector and MPPT.

Hello,I am looking for GaN based half bridges or full bridges evaluation board with gate driver for 250-400V and 3.3kW power rating for Dual active bridge DC-DC converter.Kindly suggest evaluation/ development board for the same Thanks & RegardsAbhishek

Hello we have a need to string the SMAJ58A-TR TVS Diodes with some chip resistors in parallel and I'm wondering if we could physically stack the diodes on top of the resistors due to limited board space. If so, what resistor package would be ideal and if you have any documentation on this that would be wonderful.

Hello, I have questions about a project we developed a long time ago. I will put the schematic below. We are using the BTA26-800BWRG (U8 and U9) in the schematic to parallel two inductors. The voltage applied to these two inductors is an ultrasonic signal of 600V at a frequency of 20-120 kHz. However, I don't fully understand how the TRIACs can switch, given that there is no voltage source in the loop between the two gates. Yet, the project works almost perfectly, except that sometimes, when the generator is off and the attempt is made to turn off the TRIACs, they remain switched on. U8 & U9 (BTA26-800BWRG) & OP1 &amp

Hello, I use viper22A for 220VAC to 14VDC-1A PSU. When I shorted output, around 3A current flows from Ampermeter. Viper22A datasheet explain that if output is short circuit no feedback will come from optocoupler, FB pin voltage will be 0V (my measurement voltage on FB pin 0V too), and viper22A switch-off the Mosfet.Why mosfet switched continuously although I did output shortcircuit?

I am a power electronics engineer. I would like to know if the Safe Operating Area (SOA) specified in the datasheet for your company's SiC MOSFET SCT040W65G3-4AG is a guaranteed value.

Hi,New to the community here.I am new to using this BMS evaluation board AEK-POW-BMS63EN. I want to connect a battery pack to this and an external microcontroller to receive the digital data and do something with it.So a battery pack as input to this eval board. And the board sends digital data (Hex) to a microcontroller. 1. Can I use a non-STM microcontroller to connect to this? 2. Can I connect this to a PC directly or I need an interface?3. How can I use AutoDevKit Studio for this? Please kindly advise, thank you in advance! 

Hello ST Community,I'm working on a project that uses the VNQ9025AJ, a quad-channel high-side driver, to manage the power supply in a car—primarily for powering fans and pumps. We are using 12V as VCC.According to the datasheet, each channel supports up to 30A and includes thermal protection at 150°C. However, when we integrated it into our car and attempted to power all the fans and pumps simultaneously, the driver overheated (reaching up to 200°C) and burned out. This is unexpected because the fans and pumps are relatively small, each consuming only around 3A.I'm unsure why this is happening. I'll attach the project schematic below for reference. Any insights would be greatly appreciated!