Power management

I can't read référence; I am asking if this component is a zener Diode? And I'm looking for any équivalence  

I found the ACS108-6SA that seems to fit my needs.   1) I will control the gate with my stm32G0B1 uC. I really don't understand why I have to connect the 24VAC Neutral to the +3.3VCC of the MCU ! It sounds like dangerous no? i can understand that the current for the gate need to loop somewhere but why to connect the +3.3v to the neutral ? This device seems to fit my needs and seems to have been designed for this purpose, but the schematics looks really strange at the moment to me. 2) Concerning my need to switch on / off big pump grundfos sba3-45a that is 230vac. this pump looks to have a big capacitor Should i use triac like T410 ACST1235-7GTR for example or ACST1635-8FP ? I have also pure inductive 88W air bubble to connect on it that pollute a lot the 230vac line when switch off.

Hello!I am currently designing a flyback converter with the altair04-900.The .lib file in the spice model folder is encrypted. I cannot open it neither with Altium nor with ltSpice.I would like to know, which simulation software can decrypt it? And, more specifically, if there is any free simulation software?

Hello, I'm considering using Viper12 to 3Phase AC/DC non isolated buck converter 5V 60mA Vout. I found some application notes like AN1357. But is it reliable? Or will it cause problems in long-term operation? Has anyone experienced it before? Thanks, Gökhan

I want the specific Ron data corresponding to different VGS values (e.g., 8V–15V) when the MOSFET switch SCTWA70N120G2V is in the linear region.

Edited by a ST moderator: Update the title and the content with the part number Hi,I'm using LD1085D2M-R regulator. There is no certain information about output capacitor ESR limit value for stabilization.  -Input : 5V -Output : 4V @3A -Desired Output Capacitors : 2x10uF 10V   Can we use Ceramic capacitors with additional series resistor? In this case what is required resistance value?  

We are using BTA41-600BRG triacs on our temperature control boards to turn on 240V tank heaters. The tank heaters are 1500W, 3000W, or 4500W depending on the unit model and operate at 240VAC. The circuit we are using is attached. We use a FOD4108 driver to activate the triac.We have seen at least 2 cases recently where the triac continues to conduct even after the trigger for the driver goes off. In both cases, when we move the PCB to a different unit with the reduced load of 1500W heater, the triac works normally and turns off when we turn off the trigger. In another simulation with the failed triac on the larger size heater, if we turn off the unit while near the setpoint temperature, then turn the unit back on, the PID is working and we pulse the heaters; and in this case it is working okay also (triac shuts off when trigger shuts off). But if we turn on the unit when the temperature is far from the setpoint and the heater is on 100%, it never turns off when its gets close and the t

We are looking at using the TCPP03 and TCPP01 for a system with a dual-role power port and a sink port. We want to use this dual MOSFET with both ICs (a dual MOSFET is needed for the TCPP01 to prevent backflow): https://fscdn.rohm.com/en/products/databook/datasheet/discrete/transistor/mosfet/aw2k21ar-e.pdf The MOSFET has a Vgs(min) of -2V. There isn't much information about the gate driver circuits in the TCPP01/TCPP03 datasheets. Does the integrated gate driver drive below 0V when turning the gate off?Thanks

Hi Sir, I'm looking for the data sheet and programming guide for the STWLC38JRM to develop the off-line programming algorithm. Would you please share such information for reference. Thank  you. 

Hello,I'm developing a Qi compliant product (Not getting Qi.) using STWLC38JRM.Please respond on Operating Frequency and ASK modulation cycle to get back to the testing agency.[Operating Frequency]Qi standard defines the operating frequency from 110 kHz to 205 kHz.Is it possible for STWLC38 to set (limit) operating frequency?Or does it depend on the settings of the transmitter (e.g. STWBC86)?The CFG file is provided by the customer, so I don't know the detailed settings. However, using "STSW-WPSTUDIO V2.2.5",I have confirmed that "OP FREQ" shows approximately 139 kHz when charging in BPP.[ASK modulation cycle]I believe STWLC38 sends an ASK modulated signal towards the transmitter.It seems that the signal is transmitted from STWLC38 in the digital ping phase,but how often is it transmitted during charging in BPP?Isn't it sent at fixed intervals during charging?I understand that each communication bit of the signal is synchronizedwith the

Hello Team   I have a general query.    Do we have any 555 timer with ASIL-B or ISO26262 compliant.    I am interested in discrete level solution rather going with MCU and my aim is to have redundant control/ feedback/LIMP HOME mode embedded in the 555 timer so that i can achieve functional safety requirement.   Thanks Kesavan

Hello,Our customer has inquired about the meaning of the last three-digit code in the marking on the L78L15ACUTR.For example, some parts are marked with "8L218" or "8L243" on the top surface.Could you kindly explain what "218" and "243" stands for?Thank you in advance for your support.

Hi, dear. Could you please help me find the datasheet for the MOSFET with part code GF329MB, as well as other compatible MOSFETs with similar specifications?   Thank you in advance for your help! Hi, dear. Could you please help me find the datasheet for the MOSFET with part code GF329MB, as well as other compatible MOSFETs with similar specifications? Thank you in advance for your help!

Hello,Does anyone have any firmware for interfacing with the L9780 wideband controller. I am planning on using a LSU 4.9 but any sensor configuration would be useful.Any information is appreciated. Thanks,

Hello I’m currently working on a design that uses the L9338 Quad Low-Side Driver and would like to perform circuit simulations in LT spice (or any compatible simulator). Could you please provide the SPICE model for the L9338?If it’s not available publicly, kindly suggest an alternative part with a similar function and an available SPICE model for simulation purposes. Thank you for your support. Best regards,Anusree T V

Hello,  Is there a way to set up the Sink PDO to take in a variable voltage? I would like to set up PDO2 5-20V 3AmpsPDO3 5-20V 5Amps  My plan is to use the Power Ok GPIOs to determine how much current I have and do some down stream current limiting.  Thanks

Last week, I have been testing SRK1000A in EVLSRK1000A-PF, in an application with 250 kHz fixed frequency flyback PWM with primary side control.1. I struggled around the gate no longer driven in CCM-mode, and even in DCM upon more than moderate load. Finally, I found this sentence in section 6.5 of the data sheet:When the VDS voltage gets higher than VR, the comparator triggers and the blanking time is terminated. This helps during constant voltage regulation operation, at high input voltage levels (where typically the conduction time of the primary MOSFET is short), avoiding that the blanking time determined by TOFF_min might delay the SR MOSFET turn-on. The internal threshold VR is fixed to 2.83 VCC [...]A threshold like this is not given in the table to Electrical characteristics. If it would be present there, I could have been attended on it earlier. I was quite surprised that this device doesn't offer a bit more sophisticated recognition of the next PWM cycle in order to

Hello,I am trying to send first command from the MCU (s32k312 -NXP).I am able to send but I am getting SPI response likeAnd afterwards, no matter which SPI commands send, it always sends same response from the chip i.e. 0x610000As per the Datasheet, says it is FailSafe Mode and getting SPI Error.I did all the combinations in SPI communication, but it is not getting clear this SPI response. 

Hi everyone,Good day!I'm currently working on modifying the Responder ID using CAN FD communication.I initially had a firmware running on an MCU that was capable of modifying the Responder ID. My goal now is to analyze the CAN FD communication from that MCU and replicate the commands using Python to perform the modification.However, during testing, I encountered an issue: the Responder ID is consistently being set to 0xFC, and in one instance, it was even modified to 0x1FC.As a result, I'm now unable to use the original MCU firmware to reconfigure the Responder ID.I'm not quite sure what went wrong in the process — would anyone have insights or suggestions?I will provide the CAN FD communication flow shortly.

Hi ST,I am using the STW3N170 in a linear application (constant current source) where the voltage can be 1500V and current as high as 16mA - total 24W.Can you please share the DC Curve of the SOA, please include in the graph the Thermal Instability due to secondary breakdown of the MOSFET. Best Regards.

Hi! I'm using the STP16CPC26 as an LED driver, but have a problem where all the attached LEDs initially flash when powering up. This is a problem since this is a UI with a large-ish number of LEDs and you get hit right in the face with the bright flash.I've tried delaying /OE until after I've written all zeros, and I've tried delaying applying power (12V) to the LEDs until after all zeros and /OE, but without a complete solution. Delaying the 12V power helps, but there is always a tiny blink regardless of what I do.Is there some way to ensure that everything is dark on power-up?Paul

We have approximately fifty modules in the field that use the L6981CDR. The schematic below shows how they are connected. The L6981CDR is used (in combination with other components) to generate an output voltage of 5V. This output voltage is used to power our system. Our system draws a maximum of 700mA from the buck converter. However, most of the time, the current draw is around 5mA in "sleep" mode and 200mA when the system is "awake."After conducting tests with the buck converter, it seemed to work well, so we put it into production. However, we are now finding that about 5-10% of the systems are returning with the issue that the output voltage of the buck converter stops working after a few days. We measure an output voltage of 0V at the output of the buck converter (point +5V in the schematic) and the current draw is approximately 0mA. We also checked the EN/CLK pin of the L6981CDR, where 12V was present (with a supply voltage of 12.6V). The VIN voltage was also correct. Additional

Hi ,Recenlty I designed the my custom board with LDL112PV33R . My Vin is from Battery charger BQ25620 which is 3.7V. Now LDO giving directly 3.7V at Vout. I done following diagostics. check marking on IC which ic ''L112 33''. which is indicating Fix 3.3V output variant. check imageChecked footprint in desing. All OKChecked shematic design. I think that is ok . sharing the image.Removed the IC and soldered it again. No improvementAfter removing checked on my board . there was no shorting between Vin and Vout from the boardChecked shorting btw IC terminal. Not shorting. Internal body diode of MOSFET is OK. Check EN voltage. >1.4V . change Pullup value from 10K to 1K. No improvement. I also use voltage devider on AJD/NC. nothing changes. Now i have order my 10 board with This LDO. This part is not locally available in india to check where those IC are damaged or not by replacing with new IC. Help me out.       

We're using this controller in our project and have the VCC pin tied to VBUS so the device does not pull power from the battery when USB is not connected (it was pulling ~125uA which is too much for our battery life as the main power is not turned off). We've had a few cases of I2C bus hangs and I'd like to confirm this controller will not disrupt the other bus devices in the powered off state.

There are already a few posts which show there is an issue with getting the STSW-WPSTUDIO GUI downloaded. I replied to one, but I have yet to receive a response. I am looking to select capacitors to tune an RX coil connected to a STWLC38JR controller. It appears we need the GUI to accomplish this..?? Thanks in advance.