Power management

Have use of L6599D in many power supplies from 50W to 300W, is L6599AD a direct functional replacement for any applications is expected to work exactly the same? Thank you.

A P-channel MOSFET is currently used for switching the solenoid. Case 1: Is it possible for the MOSFET to fail? Case 2: If the MOSFET fails, will it become an open circuit or a short circuit? Case 3: If the MOSFET fails in short-circuit condition, how can the circuit be protected  

Hi, Good day, May we seek your expertise for the following inquiry: 1. What is the SPI frame format for L9369 RT? 2. Is it configurable via SPI? 3. What is the default SPI frame configuration for L9369 RT? Thank you.

For the VNF9Q20F, the datasheet states that the exposed thermal pad (TAB) is VCC. Can someone confirm that the large exposed pad on the bottom of the package is electrically connected to VBAT/VCC and not GND? If so, should the thermal pad and all thermal vias underneath it be connected to the VBAT copper plane?

Can anyone identify this diode and suggest an alternative please? ST E ET C453  

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Hi, I have follow the DS12900 Rev 7 Figure 21 (Schematic example for USB Type-C at 2.5W with TCPP01-M12) and still can draw more that 1.5A from USB PD source, the voltage seen on CC1 is close to 1.4V (which corresponds to 3A capability). Not sure what is wrong/missing in the circuit;  

Hello All, I’m working with a STUSB4500 chip and have hit an issue right from the get go. For reasons I can’t see, the chip is not being powered when connected to a USB-C source. Probing VDD shows continuity to VBUS, and probing GND shows good continuity to the power source GND. I’ve attached my schematic below. Any ideas where I messed up?  

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

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

Did someone know the short-circuit withstand time (SCWT) or short-circuit SOA characterization for SCT040W65G3-4 under VGS = +15/-3 V, including the dependence on VDS and junction temperature? Is the value guaranteed or characterization-only?

Are there any more resources to understand how to use STEVAL-HARVEST1, how does the energy flow from super capacitors to the MCU and also the back up capacitors. I feel few things are missing the schematic and the user guide. I want to first implement a small UART program with energy harvesting. Can anyone guide through steps in achieving it. How to connect this to board, does it mean I need to add any external wire from harvester solar panel and short it here?I have read https://www.st.com/resource/en/user_manual/um3539-getting-started-with-stevalharvest1-energy-harvesting-board-for-nucleowl55-stmicroelectronics.pdfhttps://www.st.com/resource/en/schematic_pack/steval-harvest1-schematic.pdfhttps://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=11369460Thanks in advance.

Good Morning STM Team,I am trying to simulate a 28 W Flyback-based AC-DC offline converter using the VIPERGAN50TR controller in LTspice.Could anyone please help me with the LTspice SPICE model for the VIPERGAN50TR? It would be very helpful for my simulation work.If there are any sample LTspice projects or simulation files available, I would also appreciate it if you could share them.Thank you!

Hello ST Community,We are using the VIPER16LDTR in a non-isolated buck converter to generate 12VDC from a 325VDC rectified bus. The input is 230VAC from a Variac, rectified to approximately 325VDC through our input rectification stage. The circuit follows the standard buck topology from VIPER16 datasheet Figure 17. Operating conditions: Vin = 325VDC, Vout = 12V, Iout = approximately 250mA, fsw = 60kHz (VIPER16L type confirmed with differential probe).What we have verified as healthy:DRAIN pins 13-16: 325VDC present and confirmed VDD pin 5 (via C21, 10uF): 12V present — internal HV startup source working SW node pin 2: 60kHz switching waveform confirmed with differential oscilloscope probe D9 (FDLL4148): forward drop confirmed, correct orientation D10, D11 (600V/1A): both healthy in diode mode L3 (1mH, SRR1206102KL): DCR = 0.25Ω, solder joints inspected and reflowed, continuity confirmed C22 (220uF, 25V output cap): 1.4MΩ to GND — no leakage, no short 12V rail to GND (load side): 4.5kΩ

There are several contradictory results in the Spec regarding the mode transition after self test aborted, as shown in the following figure，Which conclusion is correct 

Hello SirI’d like to know your goods label rules.it’s only have Assemble country information, no Wafer production country information? here’s my stock label information. and now i have a new batch need impoted and the documents was wrote COO is Morocco.the Customs asked us provide the Country of Origin Certificate.could you please support ?   

I want to use L7987L in my design and want to simulate using LTspice. Is there are spice model supported for that already available. ? Please share link  

Hello ST Community,I am designing a custom high-power motor controller for an industrial servo motor (RMCS2082) and need advice on component selection, thermal limits, and layout architecture.System Specifications:- Nominal Current: 18.7 A (Continuous load)- Peak / Stall Current: 130 A (Transient spike)- Battery Operating Voltage: 24 Volts- Target Enclosure/Board Temperature: Strictly under 50°C to 60°C Max- Control Method: 20 kHz PWM (generated via external MCU)The Dilemma & My Analysis:I evaluated the VNHD7008AY using TwisterSIM. Brief transient simulations show safe temperatures around 45°C. However, calculating steady-state thermal dissipation for an 18.7A continuous load across the integrated H-bridge path (approx 16-24 mΩ hot) results in 6W to 8W+ of pure heat generation. In a standard PCB design, this localized thermal load will quickly cause a massive temperature rise exceeding my 60°C target and trigger thermal shutdown. Furthermore, the 130A motor stall current exceeds th

We are using Nucleo-F446RE + IHM09M2 + IPMM15B. The offset detection’s progress in Motor Profiler stucks at 7%. We’ve are seeking for possible results.Is it possible for the current at the J4 pin to drop below 0.01A? We observed that the voltage at the J4 pin exceeds 15V, which is higher than the auxiliary power supply's limit. This suggests that the current might have flowed back into the auxiliary power supply.

Hi Team,We are looking for detailed thermal information for the STD47N10F7AG MOSFET. I am new to power MOSFET thermal analysis and would appreciate your support.Could you please share the junction-to-ambient thermal resistance (θJA) value or any relevant thermal characterization data required for thermal calculations?From the datasheet, I could find:RθJC (Junction-to-Case) = 2.5 °C/W [st.com] RθJ-PCB (Junction-to-PCB) = 50 °C/W (mounted on a 1 in² FR-4, 2 oz copper board) [st.com]However, I could not locate the θJA specification and would like to use it for thermal analysis.Thank you for your support.Thanks & Regards,Surya

Dear STMicroelectronics Support Team,I am writing to request technical clarification regarding the wake-up configuration of the L99DZ300G's EI1 pin. We are currently debugging an issue related to sleep mode and false wake-ups in our system.[Background]An external controller inputs a 50Hz (20ms period) PWM signal to the EI1 pin for Crash Unlock detection. The signal operates as follows: Steady State: High 16ms (80%) / Low 4ms (20%) Crash State: High 4ms (20%) / Low 16ms (80%) [Current S/W Configuration]The EI1 pin is configured to Cyclic Mode using Timer 2: EI1_FILT[1:0] = 0x01 (Cyclic mode with Timer 2) Timer 2 Period = 20ms (T2) Timer ON Time = 0.1ms (ton1) [Our Analysis & Concerns]Based on the datasheet, our understanding is that the "blanking time 80% of timer ON time" applies to the 0.1ms ton (i.e., 80µs), followed by a brief 16µs sampling window ($t_{WU\_cyc}$).Since the monitoring period (20ms) matches the input PWM period (20ms), we suspect an aliasing/phase lock issue

I'm using an L6561 to build a flyback circuit to control an LED with constant current. The input voltage is 220VAC 50Hz. The output controlling the LED is 12V 0.15A. I tested it with 12V 0.7A and the circuit worked very well with a power factor (PF) of 0.96 and THDI <10%. However, when testing with 12V 0.15A, the PF was 0.68 and THDI was around 40%. Could it be that the L6562 doesn't have a good power factor under light load?

We have recently designed and implemented a PCB with TS4436 IC. And we are using this IC as a comparator in our application.While testing, we have observed that the IC taking near 40mA as supply current during OUT enable time (for FB input > 0.6V). But as per datasheet it won't take more than 4mA. We request you to go through the issue and share the resolution asap.  Sharing our application schematic for reference.  

The test conditions of VINCL parameters of VNS3V04DPTR-E chip are: Does light inject 1mA current into the IN pin, and does the SOURCE pin need to be grounded?

Good morning,I'm working on some new automotive designs and on the current boards i found what are , presumibly, STM components but i can't really identify them with the offerings in the online catalogs, (at least IF they are STM engineering samples)The body is specifically PowerSSO-16 but the marking of the components i found for now present similar but very different top markings2HTS90 D1B1HTS20 D11HTS10 200U2HTS30 D1B1HTS50 D1(these 5 are the ones i classified so far) Can i have some help in documenting them, if they indeed are VND productsBellow a picture of one of the components, there are all the same except the top markings (no logos or such)