Forum Post: What's the reference schematic for UCC28600 Design Spreadsheet?
Dear,1. I try to use "UCC28600 QUASI-RESONANT FLYBACK CONTROLLER (Rev. J)", Excel Spreadsheet, for AC/DC Converter application. But I can't find out whom the recommended COMPONENT VALUES reference to....
View ArticleForum Post: Questions for UCC2720x
I would likte to confirm the operation of UCC2720x.The customer have broken UCC27201 in the current measurement at HB to the bypass capacitor.They added harness between HB pin to the bypass capacitor....
View ArticleForum Post: RE: LP5523 EVM software
Hello,I will contact you and send the evaluation SW through email.Thanks,Sami
View ArticleForum Post: RE: BQ20Z75 high current consumption issue
Hi Onyx,I see, I'm not too sure on how to perform it. According to the manual of bq20z75, it seems something has to be done with the configuration of NR and NRCHG bits. When NR = 1, upon entering sleep...
View ArticleForum Post: RE: Not Getting PWM pulses from TPS40054
Dear Mr. MC,I require one help from you. In the same project i discussed with you, i am using one SEPIC transformer from GCI TECHNOLOGIES. I just require the core size and wire gauge of the winding...
View ArticleForum Post: RE: UCC28019A 1KW PFC
Dear Lisa ,Here comes new issue today .Good new MOS did not burn now .I add the loading ( output resistance is 280Ω，about 500W) the PFC output Voltage drop to about DC 158VI measure the PWM duty Cycle...
View ArticleForum Post: LM2991 Absolute Maximum Rating margin.
LM2991 Absolute Maximum Rating Input Voltage is -26V.Operating Rating Maximum Input Voltage is -26V.Is Absolute maximum rating margin?Regard.Bob Lee
View ArticleForum Post: TPS40210 for +/-150Vout, 500mAout
Hello, Can I use TPS40210 for below conditions?I can't find any reference design and can't simulate by Webench.-----<condition 1>Vin : 20V(min), 40V(max)Vout : 150VIout : 500mA <condition...
View ArticleForum Post: RE: What's the reference schematic for UCC28600 Design Spreadsheet?
Dear Lisa, Thanks for your response quickly! The attach file is my application, but there are some issues needed your help to confirm, describe below:1. What is the optimal soltution to select MOSFET?...
View ArticleForum Post: RE: TPS61202 internal FB resistance value
Thank you for sharing your point, it is easier to help you now. If there is a fixed output voltage version which fits your application and you don't need to adjust the output voltage, as a rule of...
View ArticleForum Post: RE: Not Getting PWM pulses from TPS40054
Please find the atttached documents.(Please visit the site to view this file)(Please visit the site to view this file)(Please visit the site to view this file)
View ArticleForum Post: RE: LM2991 Absolute Maximum Rating margin.
Thank you very much.Regard.Bob Lee
View ArticleForum Post: bq27410-G1 gas gauging device
I would need support on the bq27410-G1 gas gauging device. I need to know if for this particular device the selecting of the right cell-chemistry is possible (over EV2400 and the bqEASY)? The customer...
View ArticleForum Post: IBIS models for TPS50601-SP
Hello.Need IBIS model for the TPS50601-SP and haven't been able to locate it on this web site. Anyone have a model they could share.Thanks,Vadim
View ArticleForum Post: RE: bq78pl114 firmware update calibration
Dear Thomas,Is the calibration automatically preserved, if using api.LoadFile(USBhandle, FW_...5000...) as single action, or do i have to perform some additional commands/actions?RegardsAndreas
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Forum Post: LM25085 fails at -40°C
Hello,We use the LM25085M.Further we use current measurement across the RDSON of the FET. Low ripple configuration.So far so good.At -30°C the part fails.We think negative overvoltage leads to the...
View ArticleForum Post: RE: UCC28019A 1KW PFC
Dear Lisa,I measure the Pin 5 of UCC28019A and the voltage is 2.4V( with loading 280Ω)PFC Output Voltage is DC 390(with no Load).PFC Output Voltage is DC 161 V input is AC 110 VI have two board . one...
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Forum Post: RE: TPS71712 Inconsistency
Hi Mike100R load on the working boardexperiment done by inserting a Inductor in series to output.Mike ,when a resistor is inserted, a huge variation in the output voltage is seen on the FPGA end of the...
View ArticleForum Post: RE: bq34z100
thank for replybecause my circuit isn't the EVM. I think there are maybe some problems on the circuit I list my questions follwing1.I don't know how to connect the circuit to battery and the...
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