Forum Post: RE: BQ25504 (OK_HYST and OK_PROG pins)
We have tied OK_HYST and OK_PROG to GND.We have tested it using the EVM and our own PCB, and we have checked that input regulation works OK.Thanks very much.
View ArticleForum Post: LED Driver Design
I want to design AC to DC LED driver, so i want to ask that which software is easy to use for schematic design and testing? and also help me about main components that i have to use for good desig
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Forum Post: RE: Advanced BQMtester HPA495 TIbqMultiStationNB2.18Setup.exe...
Dear Onyx,after setting all pathes for the ocx-files, the sourcecode is runnig now perfectly.There is one more issue. When we connect the board with a new pc, the software says, the board is already in...
View ArticleForum Post: RE: Mid-power supply deign with/without PFC using UCC28600
Dear Lisa,For setup VBIAS, is the output of the Aux winding of the Flyback Transforme, we need to consider two things for designing with PFC:1. UVLO of UCC28600, turn-on threshold=13V and turn-off...
View ArticleForum Post: RE: LMZ14202 damaged
Your last feedback is 4 weeks old, and so far I have received no further information. What is the current state?For the LMZ12002 we get the information that there are quality problems (weak interface...
View ArticleForum Post: RE: LM5069-2 Power Limit out of scale
Hello, Ok, I see...I will see how can I mnage a compromise with Rs, current limit and power limit (SOA) in order to work a little bit more close to your recomendations..Great to know there was a...
View ArticleForum Post: RE: UCC28019A 1KW PFC
Dear Lisa,May I modify the UCC28019AEVM and make it work to 1KW PFC .1. Boost inductor 1.25mH to 0.45MH2.20A MOS to 25A MOS what else I need to change to make it work at 1KW PFC ?
View ArticleForum Post: TPS92560 SRC pin
Hi,Would like to enquire of this SRC pin is recommended to connect direct to ground? Based on ref design, EVM design and datasheet, it stated that the pin should be connected to the Mosfet source...
View ArticleForum Post: RE: UCC2946/3946 Watchdog period
Hello Ryan-san,Thank you for your reply.Customer want to use TWP=10ms.Q1: Question about TWP equationI calculate CWP as follows according to the equation “TWP(ms)=25 x CWP(nF)“ to set TWP=10ms....
View ArticleForum Post: RE: Power up issues with the TLC5916
Dick,The problem is now resolved.The original firmware provided a negative going latching pulse as opposed to a positive one. A newly tested firmware, with the correctly shaped latching pulse works...
View ArticleForum Post: RE: bq24195 / Input fault flag
Basically if the input power is not in the good range, one will get a fault.Since VBUS was removed and the input voltage fell below 3.8V, the input fault flag was set.
View ArticleForum Post: RE: How much current draw when power up pth12010w?
That will depend on how much power each converter is providing and the input and output voltages.
View ArticleForum Post: RE: LMZ10503 internal compensation
Hello Sevrum,Please excuse the delay in our responses. I am re-attaching the spreadsheet that you have attached from before just to clarify if this is exactly what you sent. For some reason, we are...
View ArticleForum Post: Vbat current
HiIm trying to make a solar battery charger from BQ25504 for 3 cell NiMH batteries. I need to now the current throught Vbat (batteries) ?Thanks
View ArticleForum Post: RE: Question About UCC28019
Hi, MartinI attached a PDF file of ONE CYCLE CONTROL, please take it as your reference. And we have UCC28019A, is enhanced version of UCC28019.
View ArticleForum Post: RE: BQ34Z100 Write with standard command
Hi Tom,Thanks for the information. Regarding the process flow example shown on page 11 of SLUA665, there is a variable called iTransferCode which is set to be 0 at the beginning of the program. May i...
View ArticleForum Post: RE: question about tps65381
Why can not my TPS65381 enter into Diagnostic state?temp = ecmpIfGetRegister(ECMP_SAFETY_STATUS5);the value of temp is 0x04, after I post " ecmpIfSetRegister(ECMP_SAFETY_CHECK_CONTROL, 0x17);" ,the...
View ArticleForum Post: RE: TPS65217C / AC Power supply ON and powergood
Hello Greg san, Thank you for the checking.Iattach the schematics. (Please visit the site to view this file) Problem hasoccurred in theBeagleBone-Black.Customer is evaluated by...
View ArticleForum Post: RE: UCC28019A 1KW PFC
Dear Lisa,I did some UCC28019AEVM testing . I can add the load up to 750W and the EVM still worked ,( not for long time)It is really different than our board .I have one question . if over lod, what...
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