Power management

The L6206Q datasheet Figure 14 "Typical Application" does not show the use of any additional SENSE_A or SENSE_B resistors connected to pins 45/46 & 15/16 respectively.  Section 4.3 talks about "the external current sense resistor normally used [being] eliminated."   AN1762 in section 3.5, discusses the selection of sense resistors and suggests that they might be part of the over-current setting process (which the datasheet suggests is handled entirely by the R_CL resistors).So which is correct? Datasheet or AN?  Are sense resistors required or not?  If they are required, how are they selected and how does that selection work with the selection of R_CL current limit resistors?

Hello Team,I am using the STUSB4500 USB Power Delivery controller in my design.I have designed my board by strictly following the reference schematic provided in the STUSB4500 datasheet. However, the board is not working as expected.I have already tried the following:Tested multiple firmware / configuration codesVerified all register values according to the datasheetChecked I²C communication and configuration writesDespite this, the device does not negotiate higher PD voltages.Issue Details:VBUS_READY always remains falseOnly default 5V is available on VBUSHigher voltages (9V / 12V / 15V, etc.) are not being triggeredI want to trigger a higher PD voltage, but the negotiation does not complete successfully.Could yo

For the analysis and working of the gate driver L6491, we need the simulation model of the gate driver L6491 of LTspice or Pspice. Please provide the simulation model as soon as possible. It would be very helpful to us.Thank you!

Hello,We completed a test of bi-driectional communication of the Proprietary Packet feature (PP) for a mass market client using the STWLC38 (RX) and STWBC86 (TX).We're able to consistently receive the data of 5 bytes reliability from the RX to the TX. In the other direction though, we haven't gotten it to work as the existing bi-directional communication PDF is well, not very specific. On the RX side of things, the message buffer at 0x0190 is always filled with 0's, even though 0x0088 interrupt bit 5 (RX MSG RCVD LTCH) is set to 1. The document states"The difference here is that STWBC86 does not add the checksum automatically, the user must provide it with the message. The checksum is calculated as a XOR of the message bytes, including the header."So we assume the message is then constructed as (first byte sent): 1 byte header, 5 bytes message, 1 byte xor

In STEVAL-KITXCB for controlling SD/OD pin of L6491 using such method. PWM_en connected to MCU pin. I want use same principle in my design. Can anybody describe how program this.Is such hw connection support both function for enable PWM and for controll error state of driver? (I need both) 

As we are testing this evaluation board we found that the gate pulses are not being released from the IC " STGAP3S6S", wherein we have tried with all the required power signaling to the evaluation board as specified in the datasheet. We would like to connect with you for the support to debug this issue that is hindering our usage of the product.

Hi,Since we haven’t received the datasheet yet, we’d like to confirm the following information:If the receiver side (RX) uses the STWLC89 15 W solution, what is the corresponding 15 W transmitter (TX) model?Which Qi standards are supported by STWLC89? (Qi 2.1 or ....)

Hello I tried to design a 3-output AC-DC converter using the eDesignSuite. But the software only provides the turns ratio for the transformer and no core suggestions or what so ever was shown.I don't get the idea behind the eDesignSuite software that it cannot provide these VERY important details?What is the point of not telling the transformer or the number of turns?Why is the transformer always a BLACK BOX that no one will tell you about?The design we are targeting is very simple and has no magic, a three-output SMPS.Any help?Sam 

I need to use in our application three phase power supply any of the two phase present power supply should work or with respect neutral also work if any of one phase present.  required for voltage monitoring three phase or sequence detector. any reference please provide voltage and sequence detection.capacitve power supply. 

Problem SummaryWe have developed a three‑phase servo motor drive using STGAP2SICS isolated gate drivers and IPW65R190C7XKSA1 MOSFETs.The inverter works perfectly at low DC input voltage (25–40 V DC).However, when we apply 230 V AC (rectified ~320 V DC) and send control signals to the U, V, W inputs, MOSFETs Q1, Q2, Q9, and Q10 fail immediately, even under no‑load condition.Motor SpecificationsVoltage: 230 VPower: 2000 WRated RPM: 2200Gearbox Ratio: 5.067:1Test ConditionsParameter Low Voltage Test High Voltage Test Input Source25–40 V DC230

Hi,I'm designing a custom PCB and I'll be using a VNQ9080AJ to drive 4 inductive loads (hydraulic valve spools).Is the protection diode in the datasheet sufficient for that application?The device will drive up to 28 VDC ~3.5 to 5 amps inductive loads.I need to know if I need to add external flyback diodes.Thanks!

I'm trying to use GUI(STSW-L9963E=L9963_evaluation_GUI.exe) for EVAL-L9963E-MCU.I installed all the S/W which is listed in maunal for operating GUI.And I have set all things needed, I think.If I connect the board and start a GUI, COM port turns on green 'ack' in gui and firm ware is also OK. But when I click 'configure IDs' button(step 3 in manual below), ack for configure IDs becomes red.What should I check on board or s/w setting?

Dear STMicroelectronics Support Team, We are currently using the STEF12S eFuse in a 12 V power distribution design and would like clarification on the correct usage of the EN/FAULT shared pin, specifically from a microcontroller software perspective. Application Context Nominal input voltage: 12 V Load current: up to 5 A MCU-controlled power path Requirement to detect output short-to-GND, overcurrent, and thermal faults in firmware Understanding So FarFrom the datasheet and functional diagrams, we understand that: The E

When configuring the system, firmware version 1.6 is detected correctly. However, when the configuration ID is set to 1 as mentioned in the manual, it is not acknowledged by the device (shown in red).

Hi, I'm checking the flammability specifications for MJD31CT4. I need to know if the molding material of this part is rated UL94 V-0. If it's not V-0, could you tell me what the official rating is? Any link to a supporting document would be much appreciated. Thanks!

Hello everybody,I'm using an L6981C50DR for supplying a small board with 5V. The schematics is attached and should be perfectly conform to what is described in the specification from https://www.st.com/resource/en/datasheet/l6981.pdf as "Figure 4. Basic application (fixed VOUT versions)" on page 3. I'm supplying 24V to it. Everything works well when I turn on and off the power via the switching power supply that provides these 24V. But when I reboot my board the "easy way" by pulling out and reconnecting the +24V wire, the L6981 dies immediately. After this, pin 4/Vout is permanently at GND letting me assume something has melted within the IC.When measuring the switching power supply with an oscilloscope, it provides a small peak in such a scenario but this peak does not go beyond of 28V - which is far below the 40V the L6981 should be able  to

Hello everyone, I am currently working on a lifetime estimation for a SiC-based power converter design. I am specifically looking for Power Cycling Capability data for discrete SiC MOSFETs in TO-247 packages. While power modules (like HybridPACK or EasyPACK) usually have well-documented Nf curves in their application notes, finding similar "to-failure" data for discrete SiC components is proving to be difficult. I am looking for an analytical lifetime model for discrete SiC devices, ideally using the CIP2008 formula or a similar approach with clearly defined parameters. Any insights, documentation, or links to technical papers would be greatly appreciated, Best regards

We would like to get spice model of STD10NF10T4 to do some simulation. Who can help me on this? Thanks. BRADeng

Using the NVM configuration utility for the STEVAL-ISC004V1 seems to program fineHowever regardless of what I am writing the to the NVM, the source capabilities on the device dashboard never change and always show 3 PDOs for 5, 9, and 15 volts.

Hi,I would like to use the evaluation board STEVAL-IME014V1B to drive piezoelectric transducers for medical applications. Does the evaluation module include a built-in H-bridge for direct drive of ultrasound transducers? May I directly connect the demo board to the transducers?Regards

I can't find the Datasheet of this component, any help?

We currently use the WLC38, but wish to use the WLC89. Our sales provided the full datasheet, and is ordering samples of the STWL89 for us. However, there are no more evaluation kits available.Can the eval board reference design files and/or gerber files be provided?I saw the Wireless Charging solution Wiki post but the WLC89 is not there.Thanks

 I have seen recommendation for by pass capacitor to be 10 times the boot strap capacitor for Mosfet driver IC's. When i verified the schematics of mb1419-g431cbu6-c01_schematic The Boostrap capacitance value is 1uF but the By pass capacitance value is 470nF between VCC and Gnd. Request to please clarify.      

Original title: MOSI is not responding in SPI interface TI C2000 MCU & L9026 Edited for clarity. Hi All, We are having SPI interface between TI C2000 MCU (TMS320F28P659DK8-Q1) and High Side Driver(L9026) the Our Target Board. Here are some observations regarding SPI communication. MISO(L9026) is not responding, not giving  We are able to send data in L9026 & MISO is responding. Supply voltage of VDDIO=3.3V, VBATT=12V, IDLE (HIGH)=3.3V, IN0(HIGH)=IN1(HIGH)=3.3V,(All voltages are within the limit as per L9026 datasheet). I have attached the logs for that. We Sent in MOSI CFG_1: 0x8900 (put device in active mode, frame counter = 0). We sent in MOSI STA_1:0x4403 , but the response is 0x2201, not able to read device status register.

Hello ST,Im using STNS01 as a power source in two of my different project prototypes. Unfortunately booth are facing the same problem. When the pcb was produced LDO/charger worked as intended. However after many battery and usb disconnection durring fw debugging, the problem suddenly appeared - LDO do have otput only when USB is connected. After USB disconnect LDO voltage falls to zero eventhrough 4.1V charged li battery  remains still connected. Voltages to identify the problem closer:1) connected the battery(AA sized lithium cell), usb cable and measure voltages(all are references against GND, not battery - terminal which is polyswitch protected):usb  connected- ntc:0.53V SD:0V IN:5.1V SYS:5.08V BAT:4.13V 2)then I disconnected USB but kept battery connectedusb disconnected batery backup- ntc:0.0V SD:0V IN:0V SYS:0V BAT:4.14V The schematic-power supply part is here: LDO