Power Management ICs Forum Discussions
你好:
3PCS01G 现在 输入电流波形在顶部和底部有畸变的情况,请问COMP脚如何做优化。
现在情况时这样,就是PFC母线输出是390V 2000W. 由于我们输出是35-68V的,为了效率优化,所以母线FB脚给了一个偏置的直流电压,采用MCU来灵活调母线电压高低, 目前只要那个偏置电压接入,升高母线电压后,PFC电流波形就出现震荡,不是标准的正弦波。
Show LessHI,
I posted this in the MOSFET forum but I think it might be better in this one.
I am developing a 500W PFC for a medical application. The PFC using the ICE2PCS05G is working well but when powered directly from 240V mains there have been been now several times the fuse has blown and the MOSFET blown, Infineon type IPA65R065C7.
The problem does not happen when powered at 120V or from an electronic AC source so I think it is due to inrush. I have a 2.5R NTC on the input which will still allow inrush currents of approx 120A. The controller is powered from a following flyback converter. The inductor is a very large 510uH toroid from Wurth and the boost diode is a 650V SiC type from ST. I have an 8A pre charge diode.
I cannot see any way an overvoltage can occur across the MOSFET.
I have attached a snip of the main components. I believe the problem is from the Isense input, which feeds the signal from the 56mR current sense resistor, via 220R to the chip. I have a BAS16 as protection to the input.
Interestingly the pin compatible chip from TI, the UCC28180, has suffered from what seems like the same problem, according to a post on one of their forums.
I am wondering if mains switch bounce might be something to do with it?
Many thanks
Nick
Show LessWhen the LIN transceiver (TLE7258) is used for high-speed communication (test corresponding to CISPR25),
What are the effective measures to reduce low-frequency (120k~700kHz) radiated emissions?
more than
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Show LessDuring the process of circuit testing, we used Vin=110V and Vcc=15 V under half-load conditions for testing. However, we found that the operation of the control IC was abnormal. Specifically, the Vicomp voltage would switch back and forth between 5V and 0V, and the switch drive voltage VGS showed an abnormal PWM signal. Under these test conditions, Vbop was 2.32 V, and Vsense was 1.22 V.
As for the actual specifications of the PFC circuit, its full-load power is 1200 W, the input voltage range is 85 ~ 265 V(rms), and the output voltage is 380 V. In addition, the PFC inductance is 261uH, and Rshunt is 0.0116 ohm.
The following image shows the voltage at each pin during testing.
CH1:Vgs、CH2:Vicomp、CH3:VBOP、CH4:Vsense
We would be deeply honored if we could receive assistance on this website, and we sincerely appreciate it.
Show LessHi all,
we are using TLE8108 for our new project. I'm able to configure it for Input mode (for pulse input), ON mode (digital output). but when I configure it for OFF mode (Digital input) which is diagnostic register unable to read anything.
What is the best way to configure TLE8108 to read diagnostic register?? I
Show LessHi,
I have designed an FPGA Carrier Card to host an FPGA SOM module. The board uses an IRPS5401M to provide several system voltages.
I used the USB005 and IR PowIR center's wizard to set up the initial IRPS5401M settings, and then after much tweaking of register settings, I believe I have a good and stable configuration that I would like to flash into my other boards.
What is the best way to copy a setup/configuration from a known good board so that I could exactly reproduce that same configuration on another board?
As well, I am confused about the differences between the .txt, .pcd, and .pmbs files that the PowIR software can create. Is there a document that describes what these files are and what fields/registers they store?
Thank you.
Show LessHi,
I am new the PMIC ,We are using IRPS5401MTRPBF (PMIC) in our custom board, for testing the PMIC we have installed the Power IRCenter Build 8712 ,while going through the tool there it is asking for the PowerIRCenter Design file of our board(IRPS5401MTRPBF). can anyone please provide .pcd file it will be helpful for us.
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When I opened Config Wizard for SBC, and connected TLE9263 to my laptop, it shows that uIO Firmware Version 1.1.3 Version is too low for the currently loaded XML (needs V.2.2.1..V.255.255.255). TLE9263-3BQX .
What should I do next?
Thank you.
Show LessHello. I have designed a LLC circuit using ICE2HS01G with 250kHz resonant frequency. So far the circuit works well except the duty of SLG and SHG signals is not stable. More specifically, I use 18k Ohm Rsrd connected to SRD pin which leads to around 1500ns on time of SLG and SHG signals, theoretically. However, the measured on time of synchronous rectification signals fluctuates between 1300 ns and 1800 ns. I tried to increase Rsrd to 30k Ohm and the instability has been removed. However the on time also exceeds the required rectification on time of 250kHz. So this solution does not help. Is there any perfect way to solve this? Please guide.
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