Power management

Hello!I'm trying to make a open source test board which allows people with an Arduino to try out using the STDrive101 chip. However, I'm running into an issue where it appears to be entering fault mode and refusing to leave it (leaving all mosfets disabled and making the board more or less a brick). I've attached the schematic (and here's the repo with the Kicad project and arduino code https://gitlab.com/charlesrwest/stdrive101testboard ) but I've also put a brief rundown on the setup below:Operating voltage: 12.3 volts2 massive 1000uF capacitors to keep source voltage steadyCP set to ground to disable overcurrent shutdown (so CP never higher than Vref)DT/Mode connected to ground with a 200kOhm resistor (should result in dead time of ~2000 ns).SCREF left floating to disable Vds monitoring protectionVS has a 100nf bypass capREG12 has a 22uF cap and a .22uF cap (seem reasonable?)NFault left floating, but adding a pullup resistor doesn't seem to change anything (it pulls down)I

Hey guys. Could anyone help me with the datasheets for these two ICs drivers?

We selected the Triac ST# T1635-600G for refrigerator project, to control the compressor (inductive loads). Tested T1635-600G, the heat is very serious when passing 16A current, even using a heat sink temperature is more than 100°C. Therefore, I want to use T3035H-6G. May I ask how much heat sink is required for this model when it passes 16A? Or do you have app recommendations? Are there any guidelines on heat dissipation? Thank you!

 Hi Team i designed the schematic shown below for my automotive GPS Tracker Screenshot 2024-05-27 1500131355×883 62.2 KBHere i used diodes for droping the voltage main regulator D17 used for 5 to 3.8v approx.auto bat circuit D7 used as 4 - 3.8v approx.so I'm Just thinking that is it the correct way to do this for long runor any better way to do thisplease give your suggestions and recommendations.Thanks in Advance  

Hi, I would like to adjust OCV parameter in STC3115. In datasheet I see equation for calculation OCVtab value. But I don`t understand it. If I have STC3115IQT and I can set 100% SOC from 4.313 V to 4.22V.(4.22-4.313)/0.55 = 0.05 but to register I can only set numbers from -127 to 127 . Please how can I correctly calculate OCV offset value.thx

Hello I want to use STEF12PUR (electronic for 12V) and have following question:1. What is the response time of this fuse (how fast it will trip in case of over current)?2. For me not clear difference between ILIM and ISHORT?3. If I want to set fuse for 2A according paragraph 5.2 I have to use 47.5 ohm resistor (by using formula: 95/2A = 47.5 ohm). But why graph 13 shows much higher values for this resistance - ILIM seems to be even ~3A?  Thank you. Alex

Help me find the diode.

Dear all,I am a BMS engineer looking for an automotive-grade BMS solution. Is L9961 good enough to develop an automotive-grade BMS for onboard battery pack monitoring? Do you have any other suggestions?Thank you very much.

Hello everybody,I am working on the I2T functionality of the VNF1048F high side switch controller with intelligent fuse protection.I have set the VOC THRS as 16.8mV & VSHC THRS as 91.9mv. Tnom is taken as 2sec. I am trying to plot the i2t curve given in the datasheet but unable to do so. Is there any documents or tool that will help plot the curve? Thank you in advance. 

Dear All,   I purchased the L9963e board for demonstration of the BMS systems. I installed the NI tools and opened the same and its opening.  I am unable to make a communication. I installed the FTDI driver as mentioned in the user manual in windows 10/11  When I checked in the device manager, the com port is not showing and it's not opening.  Kindly I required an support to have the communication with the PC so that I will open the SW and work on the BMS     Regards S.Prabhu

Hi there!I'm using the STM32G474E-EVAL to drive the STEVAL-IPM20B (eval board for the STGIB20M60TS-L). I'm running my motor (SM3L-084A) at 380V. Note, I've checked with the vendor about running the motor at higher voltage than quoted and there should be no problem. Drive configuration is sensored FOC using a 2048CPR magnetic encoder. The only modifications I've made to the eval board is adding a 150uF bulk capacitor. In early evaluation, it seems that the STGIB20M60TS-L increases in temperature far faster than I expected. In the following test conditions (after configuration with the MotorControl Workbench using the eval kit setup)PWM = 16KHzI_motor = 3AV_bus = 380VMotor stalled, pulling on load cellThe driver case temperature goes from 25C to 80C in 20 seconds. I'm measuring case temperature with a thermocouple, not using the built in die temperature sensor. Also, I'm not presently heatsinking the case since I wanted an early evaluation first (one is in the ma

Currently we are evaluating voltage mode feature of powerstep01Motor Parameters:Motor Phase Resistance: 8.4 ohmMotor Phase Inductance: 5.2 mHKe: 0.07392We have tested voltage mode by changing current from 0.5 to 1.1 A. Test report are attachedAlso In application we are operating motor from 2 to 14 RPMKindly share your feedback on test result and test procedure.Please go through it. Let me know anything is required.

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Hello Team, While going through datasheet, I noticed that there is no mention on what happens if we are trying to put RID for a write only register in MOSI frame. Will it cause any faults or does it work as expected?  

Hi I am currently working on a project using stwlc38.I am using it in conjunction with a power management IC, MAX17330.The circuit is simple, VOUT and system power is connected and normally I use it to discharge the battery which is connected to MAX17330 ic, but when the stwlc38 chip detects the wireless charging and sends the output to VOUT, MAX17330 ic receives the output and charges the battery.There is a problem in this part When the system voltage connected to the VOUT pin is 3.05V or less, it recognizes that it is charging well.When the voltage is higher than 3.05V, it does not recognize that it is connected to TX (op mode is fixed to 1).Do you know of any settings or workarounds related to this?

 Will be looking for a simple sequence to activate the Outputs of the L9026 Note:- INT0 and INT1 are used to activate the chipQuick Response will be greatly appreciated.Thanks,Krishna

Hi,When STWBC86 is operating fully independently without being interfaced with a host system, how can the GPIO be used to drive indicator LEDs to indicate charging status, fault etc? The datasheet shows how these can be programmed to inputs or outputs but how are the relevant functions assigned?Cheers

Does anyone know if the L9305 supports Daisy chain communication? 有人知道L9305是否支持菊花链通讯？

HI Sir,how do we define the switching frequency of the L7987the switching frequency range is between 250KHz and 1.5MHzlooks like if the switching frequency is set to 1.5MHz, the ripple appears to be much smaller, so can we set it to 1.5MHz under normal design.thanks,With best regards,PZha 

Hello! I have asked the few I know who have knowledge of this and now turn to this one inexhaustible source of knowledge aka. the electronics forum. I was going to buy stepper motors yesterday but got so confused about the spec that I need to get an answer to this first. 2 different stepper motors, quite close in size but with very different spec. https://www.oyostepper.de/goods-40-Nema-17-Schrittmotor-Bipolar-12V-18-Grad-40Ncm-04A-12-Volt-4-Dr%C3%A4hte-Hybrid-Schrittmotor.html https://www.oyostepper.de/goods-38-Nema-17-Schrittmotor-Bipolar-18-deg-22Ncm-133A-28V-4-Dr%C3%A4hte-Hybrid-Schrittmotor.html Both Nema17 but the first 1.33A and 22Ncm and the second only 0.4A but almost double the torque. I can see that the resistance is very much higher on the latter but what's the catch? Double the torque to 1/3 the current sounds a little too good to be true so what am I missing?

  Hello. I am using L9396 for WSSWhen reviewing the WSS operation with the ST_L9369 datasheet, there is no detailed explanation regarding the Pwm Data format DATA[0...8]. Could you provide information on what each bit represents?

Hello, We are making a design LED1202 (QFN20) and need thermal resistance(janction to ambient). What is the thermal resistance (junction to ambient) except for the JEDEC PCB(2S2P). We use smaller copper area of printed circuit board or less layer than 2S2P such as double-sided PCB. How estimate theta ja in such cases. Thanks,

I tried to update the STEVAL-IP023 board with DFU using  STM32CubeProgrammer, but the STM32CubeProgrammer hang during the procedure, see picture attached.The board is recognized ad DFU device but the procedure does not work.Any suggestion?Thanks 

Dear STM,I am a student and currently working on the lifetime estimation of an IGBT for my research, which involves a Finite-Element simulation on STGF7NB60SL IGBT.To run the simulation, I need to know the material properties of different layers in the IGBT such as young's modulus, coefficient of thermal expansion, density, thermal conductivity and so on of each layer (Silicon chip, copper leadframe, solder joints, encapsulation...). Since there are many different material properties depending on the material composition of the layer, I would like to know what values of material properties are used for this IGBT. I appreciate your attention to this post. Sincerely,

Recently I need a power supply that supports outputting 300VDC, 250VDC, 150VDC and a combined power of 50W, the input could be AC or DC, I tried eDesignSuite but no result matched my need.