Forum Post: Bad behavior of VSYS using BQ24161
Hi,When I am using the BQ24161 with an AC adapter I get a fault condition over the VSYS (See attached)Every time a battery detection cycle starts the VSYS falls and the VBAT looks corrupted.It doesn't...
View ArticleForum Post: Bootstrap gate driver
Hi guys!I have a problem I hope you can helpe me solve. I am building a buck voltage regulator for input voltages between 50-300v. The problem is that the power mosfet I use as switch overheats and it...
View ArticleForum Post: RE: SLUC146 and UCC25600
the maximum capacitor value on SS is recommended to 1uF in the datasheet of ucc25600.if i add 4.7uF SMD Cap on SS pin, ic ucc25600 work abnormal..it seem that it is conflict btween SS function and OCP...
View ArticleForum Post: RE: UCC25600 Based 3KW LLC DC-DC converter
hi how about your 3KW Project now?i think Full brigde LLC is fit for 3kW..but the controller of this FB LLC is difficult to select,switching frequency :200~250KHz
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Forum Post: TPS84250 AGND pin 37
Hi,Recommended footprint shows eight Vias around pin 37 (AGND). However, the recommended layout doesn't use these Vias as they are connected only to AGND plan on the Top layer and are isolated from the...
View ArticleForum Post: RE: BQ24610
Hi, Thank you for the information.I understood that Bq24160 is usable for the circuit of the attached file. Regards,Kanemaru
View ArticleForum Post: RE: TPS54060 in inverting application: possible layout problem
Hi Dmitry,I have a few questions to get familiar with this issue.Is the ringing when the switch turns off what they believe to be the source of the noise? Also what is the load current for this...
View ArticleForum Post: RE: SLUC146 and UCC25600
You may increase the protection threshold by reducing Rp. The design is based on FHA which is an approximation approach. So a design needs bench tune to make it work better.
View ArticleForum Post: RE: bq51050bevm
Hithank you very much for your answer.I have one more question:what is the best transmitter evm that can work with bq51050bevm?there are 4 kinds of transmitter EVM but all of them is for 5V and 51050...
View ArticleForum Post: RE: BQ25504 EVM problem
The switch between STOR and BAT initially closes for 50ms to charge the 4.7uF capacitor on STOR (CSTOR). If the battery does not charge the capacitor above the user set VBAT_UV threshold, the switch...
View ArticleForum Post: RE: looking for Linear charger?
Hi, Please look at the bq2407x and bq2403x power path chargers family. And also consider non power path chargers such bq2404x and 2409x. Thanks!Tahar
View ArticleForum Post: RE: Bad behavior of VSYS using BQ24161
If you include VIN on your plot, I think you see that it is drooping at the same time VSYS is drooping for the same ~ 32ms. If so, then the adapater is falling the bad source detection circuit.
View ArticleForum Post: RE: Regarding the TPS54331 Buck converter layout
There are two schools of thought on this; single point grounding vs. distributed grounding. I have found both to work well. Typically, the distributed approach may reduce EMI issues though.
View ArticleForum Post: RE: LM5022 - Wide Input - Transformer design verification
For LM5022 to start, you must have the VIN voltage at least at 6V. D6's leakage current may cause too much voltage drop across R3 and R8, and D6 and Q7 cannot not produce 6V for VIN when the input is...
View ArticleForum Post: RE: chip suggestion
Hi Anthony,Thanks for your reply and suggestion.But on the second part you said about the Cout and ESR.On the datasheet of TPS40210, there is an example about how to calculate the chips for the...
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Forum Post: RE: TPS63061: What's the input impedence of Vin pin?
Of course, John.As you can see, there are 2 power sources, 1 from USB micro-B port, the other from P6, which is connector for 4 alkaline batteries in serial.
View ArticleForum Post: RE: LP3470i Operating Temperature Range
Hello Paul,Please give us another day to get back to you. Thank you for your patience. Regards,KartikSystems and Applications, TI
View ArticleForum Post: RE: Sync Pin (LM2267x) - advanced information
Hi Wolfram, It seems that you can do free-running (500kHz) frequency and synchronize to external clock with higher frequency. You can do that without having to disable/enable or power cycle the chip....
View ArticleForum Post: UA78M33 - Incorrect Footprint?
Hi There,I've recently started using the TI provided footprints for CAD design. It appears that the footprint for the UA78M33 does not match the datasheet...
View ArticleForum Post: RE: TPS40170 start-up current limit issue
The loop does look much better with the electrolytic capacitor added. Please note the selected IC in the screenshot shared was the TPS40422. The loop changes slightly but is still stable if changed to...
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