Power management

I am willing to drive a 0.1OHM resistive lead with 4A.Can It be done? eDesignSuite notes that it is possible.I am getting only ~1.4 Amps in my setup

I am designing a PV cell charging circuit with SPV1050.When the configuration is set to boost mode, I am curious what happens if a voltage higher than Veoc is applied to the PV cell.

Hi,   Is there driver available for L9966 FlexInput IC ?. Any pointers or code would be helpful.  

 Dear ST community I would like to use STDRIVE 101 similar to STEVAL-POOL4A board (s. schematic above). But to reduce number of PWM pins used I'd like to pull all the ENx pins to VDD (e.g. +3.3V) and drive only INx's pins by an advanced timer. According to "DS13472 - Rev 2" and "Table 8" on page 17 it shall be feasible. Could you confirm?What would be possible disadvantages of 3 PWM design regarding 6 PWM design?

Hello,I have a problem with the output voltage of 3.3VWith input power up to 6V everything is fine. But when I increase the voltage up to 24V, the output voltage slowly changes from 3,3V to 2,8V. The load is about 50mAI can't figure out what the problem is, I've tried everything. can you please advise me?

I would like to measure motor load torque using the FOC Iq current. Am I correct that torque should equal Iq*Kt. I am using the ST Motor Control SDK 5.4. I have characterized the Kt of my motor. I calculate Iq [mA] = Iq_s16 * VDD [mV/(Rshunt*Gain*65536) When I test with a torque meter, I'm calculating roughly 2x the torque as compared to the torque meter. Is there something I'm missing in my calculation?

Please advise me where I can find the device marking for VIPER06HN. I was expecting to find it in the datasheet but it doesn't appear to be in there.What is the meaning for CHN on the top right side and for F04250 on the bottom right?Thank you.Paolo

Dear all,  I would like to inquire about this part L9026-YO-TR, there is a character “ES” on the top marking, what does this mean? Best regards,cassie

    hi ,Aiming to have few minutes power  back up for  STM32 mcu with SD card incase main supply 5v goes OFF condition . Timer added for capacitor  charging time since initial cur

Hello,Can I directly replace L6569 with L6571 High Voltage Half Bridge Driver with oscillator?I've notice that in L6571 doesn't have the internal bootstrap driver.Thanks.

Moved from Feedback forum.I am exploring the possibility of using the EVAL6498L Evaluation Board to reverse the polarity of a DC bias in my circuit, and I would like to confirm whether it suits my application.Application Details:Objective: To dynamically reverse the polarity of a DC bias voltage (80-120 V) supplied to a detector (GDD—Glow Discharge Detector).Requirements:The ability to connect the DC supply terminals directly to the board and control polarity reversal.Option to program and automate polarity reversal using a triggering circuit or an Arduino/microcontroller platform.Specific Questions:Can the EVAL6498L Evaluation Board handle the task of reversing the polarity of a DC bias by directly connecting the supply terminals to it?Is an

 I don't really understand how these two functionalities differ. One is measuring on both low side and high side, the other one only on low side.The available threshold values are the same in both cases.When would you use OCD_TH and not STALL_

Hello,We are looking to use VN9D5D20FN (SPI management and monitoring) as power distribution solution for our product. There are 4 channels which are fed from common output of a buck converter. The buck has 5V 3.2A max output and that goes into VN9D5D20FN, to be shared across 4 channels.VN9D5D20FN datasheet specify minimum operating voltage 4V with a recommended operating voltage of 13V. At 5V  we are very close to this min threshold, any considerations?Thanks. Cio

Hello,in the Datasheet of the STPM32 the accuracy of the active power is 0,1% error over 500:1 dynamic range.Is this the best case error or the maximum error of the enerqy measurement after calibration?What does the dynamic range of 5000:1 mean?  

Hi, We have ordered the AEK$POW-BMSWTXA Eval board in hopefully testing it with our active battery balancing solution. I was wondering if anyone knows if this board can be used standalone without the need for a secondary MCU, and if there was any way of programming this board without it. Thanks.

Hello everyone, In the link below I designed a DC/DC Buck configuration with the L7987L chip. We have used this chip many times but I needed to update the EMI performance so I reduced some loops on the layout side. Also removed the separate ground plane. Now there is just one ground plane under the buck circuit.I was actually surprised that it's not working anymore. Who can help me with this?It is switching but it is not regulating into the 0.8V feedback for some reason. I tried changing the compensation network but without any result.HELP ! PS. I tested with different input supply voltages from 9 to 24V. In the document below, I mentioned 2 supply voltages.PS2. I also broke some chips. It looks really unstable somehow. I think they are broken because they didn't switch anymore. Schematic, layout and signal images:

L9788 Marking is 0D273, is it correct?Please see the label photos and product MARKING AREAIs this the original？

I am planning to use a smart On/Off controller in my circuit. I have came across STM6601 (smart push button On/Off controller) which matches my requirements. The under-voltage Lockout seems to be done by comparing the input voltage with the internally generated voltage Vth. From the datasheet (page no - 48), I have seen that the value of Vth varies in different packages. My requirement is to detect the under-voltage at 2.8V in the same type of chip (with all the features available in STM6601). But the available chip's under-voltage is at either 2.5V or 3.1V. Datasheet link of STM6601 - https://www.st.com/resource/en/datasheet/stm6600.pdf It will be very helpful for me, if I get answer for the following questions:Is there an existing chip/ solution for detecting the under-voltage exactly a

Hi,Can you please tell me the function of status pin? Is this pin can be used as feedback pin and connect to mcu?If not used, what to do? In datasheet, table 2 is given for unused and not connected pins, but it is not clearly. 

From the datasheet and AN4870, we understand that it is necessary to calculate the battery's internal impedance and measure the OCV table.After configuring CC_CNF and REG_VM_CNF, the STC3117 operates properly using its algorithm.The operating temperature range is -40°C to 85°C. How can we create a temperature-dependent model in the STC3117?Is it achieved by dynamically writing OCV TABLE0~15 and the measured battery internal resistance for different temperatures when a temperature change is detected?Could you kindly provide a detailed procedure for building the battery model?

Hello!I have a L9963E in 192 cell EV battery setup, there's 16 modules daisy chained, each handling one 12S pack. The bottom module has a L9963T and stm32 chip that handles the whole pack and communicates with car through CAN bus. Everything is working!However I noticed that every module reports slightly lower voltage for cell 7 (Vcell 9 in L9963E). This is the cell that sits right next to the "middle gap" where I have two unconnected cell inputs. VCELLx_EN is "0" for those two cells.RLEC 0 (=0): Volts: 2971 2969 2971 2969 2969 2967 >2925< 2967 2971 2969 2964 2940 Temps: 21 21 21 21 21 21 34 faults: 00 timeout: 0 RLEC 1 (=1): Volts: 2979 2979 2979 2979 2976 2979 >2945< 2979 2979 2981 2979 2971 Temps: 21 21 21 21 21 21 30 faults: 00 timeout: 0Volts are in mV. Left side is lowest cell (Vcell1), right side is highest (Vcell14). As you can see the cells marked with > < have about 35-4

Hi everyone,for this driver I am seeing 700 ns sw deadtime also deadtime: 800. What is difference between them and which one is in use in application. Second question why it is 700 or 800 ns because according to Mosfet datasheet this values is too long. I am not HW designer this is why I have some lack of information.  

Hi,We are currently testing the above chips.I have a few questions:Can I get information or documents stating how to download firmware using an external MCU and the reference design for that? We use 3.3V I2C communication, and I understand the ST chip uses 1.8V.When I connect an MCU to the ST wireless charging chip, can I manually control the register to manipulate the total current? For example, by calculating the RX side's thermal condition and changing the TX DC MAX/TX DC PING registers in real-time when the chip gets hot to lower the temperature. Our design sometimes gets hot, causing the charging to turn on and off.If number 2 is possible, should I connect the MCU to both TX and RX, or just one? My question might not be very clear, so I am willing to accept an answer that is close enough. I would appreciate your

Dear All,I'm using the evaluation board STEVAL-IFP033V1 Galvanically-isolated 8 channel high-side driver based on the ISO8200BQ.I powered the board with 22.8VDC, all outputs on from the isolated side (all LEDS green on the output connector)I checked the short circuit behavior and it works fine.With a single resistive load on output 5, equal to 15 ohms, the measured output current is about 1.4 A continuous.The temperature of the chip becomes very hot, above 130°C in these conditions, and with the oscilloscope we never have the fault signal active, not even for brief moments, and this could be ok.The problem seems to be the output voltage, however, which decreases by about 5.8V compared to the input supply voltage, (the output drop

Posted on November 05, 2016 at 19:04 Hi I would like to use L7987LTR in a few designs. The datasheet of the IC says its able to provide 2 A current however I can only measure 0.5 A. I have tested the schematics in 3 different layouts and layouts all seem to be good but all have the same behaviour. This makes me believe the problem is not in layout. Moreover, I have tried a few differnet inductors (10uH) and diodes but I only measure 0.5 A output current. What am doing wrong? why does not the IC provide more current? Thank you for you time in advance. L2 = NR8040T100M (3.1A 2 mOhm Max ), LQH43PN100M26L, 744045100 D5 = NRVTS260ESFT1G (650mV @ 2A), B340B-13-F (500mV @ 3A) Best regards, -Alex #dc-dc-conversion #l7987