Power management

I've encountered an issue while simulating a schematic in the eDsim software. I attempted to create a schematic resembling the reference design by exporting the schematic of a 100W flyback converter from the online tool of ST eDesign suite. I then made some modifications to it, such as adding voltage divider resistors to mimic the function of the USB PD controller. I referred to the datasheet of the USB PD controller STUSB4710 for the resistance values of the voltage divider( R1=100K, R3=8k87 to have 15V, R4=2K49 to have 12V, R5=4K42 to have 9V and R6= 16K2 to have 5V). During the simulation, I was able to obtain the 20V, 15V, and 12V PDOs, but I couldn't get the other two PDOs, 9V and 5V, to show up. My objective is to display all five PDO output voltages I can't see where is the problem wether in the resistance value or something else. Additionally, for synchronous rectification, I replaced the Schottky diode with a MOSFET. I attempted to mimic the function of the SRK1001 by sensing

From the application schematics of VNF9Q20F, seperating my ground planes for CReg and DVcc but wouldnt DEV_GND (straight from the VNF9Q20F at the bottom) be connected as well instead of to battery ground? Shown as the drawn orange connection. Or both? 

Hello everyone,  I am designing a PCB and I want a power path selector which can change the source between USB and Battery.Can I do this with STMPS2141STR ? I cannot find a circuit or an application note. This is my design is that correct ? Can somebody explain to me please

@unknown, There is no mention on how to actually perform writes to the FTP (Few Times Programmable) memory in the Data Sheet.  

Hello, Looking through the data sheet for the STWBC86, there doesn't appear to be a way to write to the FTP (Few Times Programmable) memory, nor save individual configuration register values over i2c.  Any register values are only written to RAM and lost upon reboot... No worries, use the FTP memory for the config, but there doesn't appear to be a command in the data sheet to either: Saving register values to the FTP Memory one at a time Using an address to write the header values for config / patch to (nor the process, if it differs from just writing all bytes to the specified address) If neither is possible which would be strange, what's the recommended process to program the chip at the factory?

Please i don't find this reference

Hi,we are using L9960 H-Bridge -L9960 for automotive application.Here are the inputs to consider using L9960.ParametersMinTypicalMaxRemarksInput Voltage (UBAT)8. V13.5 V18. VL9960 device will supports 4.5V > < 28VOutput Voltage (Out)7.4 V12.3 V15.75 VOutput voltage almost same due to FETs switchingInput Current (IBAT)3. mA4. mA5. mADevice current consumption for normal operationOutput Load Current (ILOAD)2. A3. A5. AL9960 device will supports 1A > ILOAD < 15ACould you please help me with power dissipation calculation of this IC. I am aware of this application note an4867-l9960-l9960t-automotive-integrated-hbridges-stmicroelectronics.pdf . But can i get any worksheet for the same for doing power dissipation calculation?

I am having difficulty locating information regarding some diodes. These diodes are either zener or TVS.Can anyone help me identify it? A link to a cross reference information page would be really helpful. Will be looking to source them for repair projects.Thank you for your time and efforts.

I'm currently controlling a closed loop stepper motor with an Arduino Uno R3 via the CL86 stepper motor driver. I also connected 2 buttons with pull-down resistors with which I can, for example, rotate the stepper motor by 90 degrees in one direction. The control works so far, but the buttons also trigger when I touch their cables (e.g. the pull-down resistor) and also the stepper motor (metallic surface). Why is that the case? Anyone have a tip?

Hi, We like to use the STUSB4500 without having it to progamm via the I2C. So we need to use the standard configuration. If I understand well, these are has 3 PDOs: 5v/1.5A - 15V/1.5A and 20V/1A.However, the 20V/1A is too high. Is there a way to prevent the 20V/1A. and to only have the two PDOs  5v/1.5A - 15V/1.5A active. (without to programm the I2C)Thanks,Olaf

Hi, I've been tasked with repairing an old analogue/mechanical instrument cluster from a Ford Transit van. The fuel and temp gauge instrument was not working. I determined that the voltage regulator wasn't working. It has labels of '950A' and '81AB-C2A'.Trying to research '81AB-C2A' I get very few results, a post in a Ford Transit forum where someone apparently successfully replaced one with a 9v 'TS 7809 CZ', and a listing of some old stock in Poland that seems to have the '81AB-C2A' part number and also has the part number 'L2610CV'. I found a datasheet for L2610CV which is a 10v output model, but I'm not 100% certain the association of the two part numbers is correct.I ended up ordering a small set of 'L7810CV' instead which seem to have very similar specs to 'L2610CV', but supporting up to 1.5A instead of 0.5A.Having fitted it and the owner having tested the unit back in the vehicle, the instrument is working, except the fuel gauge is pegged at maximum despite the owner having

Hi, I have a STEVAL-WBC2TX50 Evaluation Board, and I am having issue with input power. Whenever I supply Vin to the board, it takes a lot of current at low Vin. Can you help me solving this problem? Thank you!

Hello,We are using the BTA41-600 BRG in an insulated package for our application. However, the datasheet provides limited information about the insulation values of the package. Could someone please provide more detailed specifications regarding the insulation values?Any assistance or additional documentation would be greatly appreciated.Thank you in advance for your help.Best regards,Thomas Strasser

hi.I configured a centralized BMS using three STM32L431 and AEK-POW-BMS63ENA.Instead of using a battery, a battery pack was implemented using a DC power supply and a fixed resistor.(Refer to the picture below)When DC150V is applied, the voltage of each resistor should be 3.75V.However, I confirmed that the voltage came out differently.[ Voltage data for AEK-POW-BMS63ENA(1)][ Voltage data for AEK-POW-BMS63ENA(2)][ Voltage data for AEK-POW-BMS63ENA(3)]When 3 BMS are connected in parallel and DC 50V is applied, the voltage is confirmed normally.[ Voltage data for AEK-POW-BMS63ENA(1)][ Voltage data for AEK-POW-BMS63ENA(2)][ Voltage data for AEK-POW-BMS63ENA(3)]What's the problem with connecting them in series?    

Hi I am working on a project using stwlc38 and stwbc86.They charge well, but the charging distance is an issue.I need it to be able to charge at a distance of around 2.5T, but when I go beyond 2T it won't charge.So, I put a Tx coil like the one I used on a ready-made Tx module and tested it, and it charges up to 2.5T.What should I improve to increase the charging distance?Rx, Tx, Coil, or any method, please let me know if you have any suggestions. Thanks!The product used is the 5W product 

How do i control the angle of the motor? I think I need to change the voltage I enter into the potentiometer, what should I do?  

Hi Sir,Can the configuration registers of the ALED7709 be stored in the ALED7709, or must they be controlled via I2C by the MCU every time? There shows "This variant is the most generic one, it must be controlled through I2C since at POR almost all registers are clean." in the datasheet page 53.Does it mean ALED7709 cannot store configuration? 

Hello,I have built chargers with the L6924D and they do what they should, charging and detection and error-reporting works.The charger is not permanently connected to the battery but has a 3 pin spring loaded connector. Sometimes there is a connection missing because of dirty contacts or something similar and it does not charge. If GND an NTC are connected, it will report an Error because no Charge current flows. if GND and Bat+ are connected, it will report because of temperature out of range. The only problem I have is when Bat+ and NTC are connected, but GND is missing. The L6924D will output PWM Signals with around 1kHz and a ratio of 90% für Status1 and 10% for Status2.Any idea what could be the Problem?Attached you can find the schematic. Additional info to the schematic:-bottom left is a discrete transistor logic, which just makes three LEDs out of the two status-outputs. blue when Status1, green when Status2, red when Status1&2, all off when no battery connected. I disconne

hello whats this component and datasheet link p

Hi.. It's possible to know the exact code of this component?Thank you so much

I'm currently working on EVAL-SCS001V1. I'm able to switch profiles 9V and 12V. But whenever I choose profiles of 15V and or 20V the output voltage doesn't changes to either 15V and or 20V and it shows explicit contract to 5V. Please help on this  issue, I have tried every possibility to select the 15V or 20V profile but it doesn't worked.

Hello, STMicroelectronics team: Currently, our solution is to communicate with SPI1 four wires on TC233 and SPI four wires on L9301 to read the fault diagnosis information of L9301. The problem we are currently facing is that when I am not externally connected to the load and do not add a driver to L9301, the diagnostic information is read through SPI. However, the 8-way low side register and 4-way high side register are unable to feedback an open circuit fault, There is no open circuit fault feedback in the SR1-SR12 (0x11-0x1C) Driver status register, and when I manually create a short ground fault, only the high side open tube has fault feedback. When I manually create a short power supply fault, only the low side has fault feedback. However, I feel that this power supply fault is problematic because according to the data worksheet, only the high side can report a short power supply fault, and the low side cannot report a short power supply fault. Is there a routine for SPI to read f

안녕하세요VN750PS-E 드라이버를 통해 모터를 구동하는 회로를 작성하겠습니다.INPUT에는 5V MCU 신호가 있고 12V 전압이 VCC에 연결됩니다. OUTPUT에는 모터가 연결되어 있습니다.하지만 STATUS 핀을 처리하는 방법을 모르기 때문에 이런 글을 남깁니다.데이터 시트에 따르면 Rprot는 10k 크기의 저항으로 연결되며, 그 전에 MCU의 5V가 아닌 전원 공급 장치에서 추가 5V가 나오는데 맞습니까? 누구든지 좀 더 이해하기 쉬운 그림을 말하거나 그릴 수 있습니까? STATUS 핀을 제대로 연결할 수 없었던 현재 상황을 게시하고 있습니다.감사합니다.

Hello, I would like to use the current sensor function of the VN920B5HTR-E driver.According to the data sheet, when the Rsense value is used at 10k, it is expressed as 4V when it is 10A above 8V.I use a load of 12V and up to about 8A, so can I use 10K?? The maximum voltage by detection should be less than 5V.This is because the ADC_CURRENT value must be connected to the port of the MCU.I wonder if this circuit design method is correct. I'm asking because I'm curious about the figure because I think it's too big to use as a value for shunt resistance.  

Hi Support team,Could you help us by providing the 3D model of the AECPACK SMIT package? We need to ensure our design mechanism's size for cooling. Thank you!