Forum Post: RE: TPS51518
Leonard,I like the suggestion except the maximum current is 30A. We need 50A. At least with the 127, I can modify my switch for higher current plus it is dual phase.-David
View ArticleForum Post: LP3470i Operating Temperature Range
Dear TI and other TI experts,I am considering using an LP3470i in a new design but am confused as to its operating temperature range.1. On page 2 of the datasheet, the absolute maximum ratings section...
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Forum Post: RE: chip suggestion
With 100mA the ripple will increase. However it will still be possible to filter out the noise. The selection of the output capacitor becomes important to filter the pulsing current supplied by the...
View ArticleForum Post: RE: TPS40200 SS pin Voltage
Hi Go,Please see my responses below. The short answer is yes.1. The 8V is only a typical value and can vary with the output voltage of the internal regulator. The internal pull up current is a very low...
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Forum Post: RE: LM5575 pcb layout
Hello Gioacchino, I am not the author of the appnote you mentioned, but I will comment on this anyway :)The portion of the circuit with high di/dt will be from the PGND to the negative terminal of the...
View ArticleForum Post: RE: LM317 Reverse Biasing Leakage Currents
David,A series diode will stop reverse flow. If the constant current is about 20mA then the TL317 (100mA version of LM317) may be a better choice.
View ArticleForum Post: RE: BQ24610 / Handling of unused ACN and ACP pin
Hi,I found that bq24171 also has ACP and ACN pin and they are tied to PVCC directly in Fig2 in datasheet. I believe this configuration can be disable the function of input current sensing. Is my...
View ArticleForum Post: RE: Frustrated with BQ27510 Fuel guage chip for more than 3...
Yes we have calibrated the voltage and the voltage and current read by the BQ27510 is correct.No our battery doesn't have the thermistor.The Ti evaluation board has a default thermistor connected...
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Forum Post: RE: LM5116 Layout
Hi, i've moved adjustable resistor from top to feedback. Problematic oscillations (250Hz) probably were caused by switching between internal regulator VCC and external source from VCCX. I've measured...
View ArticleForum Post: RE: TPS54229 / VFB VOLTAGE vs JUNCTION TEMPERATURE
Ta=25degC does not apply to this graph. The temperature is forced from -40 C to 110 C so that Ta = Tj.
View ArticleForum Post: RE: LM2576 - Voltage latches to 5V from a 12V supply
Hi Denislav,Thanks for your time and effort in solving this issue. If you feel that certain modifications / improvements should be made to the LM2576 part of the circuit, please let know also.BrAnadi
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Forum Post: LM2674MX3.3 - Gave 3.3V output for a while, now a steady 3.79V
Hi,I am working on an engineering project for school, and as part of my design I am using the LM2674MX3.3V regulator. We have a steady input voltage of 12V and we need 3.3V at the output. I used the...
View ArticleForum Post: RE: chemical fuse
Hi I have a large selection of chemical fuses. NOS of about 200 on hand. Let me know and I can send out what you need. I have tons of NOS tubes and transistors as well. Todd 540-641-4536
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Forum Post: RE: LM2674MX3.3 - Gave 3.3V output for a while, now a steady 3.79V
Altium Schematic and PCB LayoutNote that the grounds are usually connected via a polygon (not shown)
View ArticleForum Post: dcdc isolated in:10V-32V out:1.5V..4V constant current 8A
hii need to build a dc dc converter.it must be isolated for in to out.accept min. 10V-32V as Inputoutput must have a more or less consant current of 8Avoltage on output 1.5V..4V the quality of the...
View ArticleForum Post: UCD9222 programming
Hello,I work on ICT project and our customer (Sonus Network) requires to program UCD9222.Our tester platform is Agilent 3070 and would like to know how to fulfill our customer requirement.Do we need an...
View ArticleForum Post: RE: LM5575 pcb layout
Hello Denislav,thank you for giving such a comprehensive answer. You gave me some valuable insights.Gioacchino
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Forum Post: TPS61028 Low Efficiency
Hello!I use two TPS61028 non isolated DC-DC in portable device, which supply from two batteries (two cell 1,2V each).One DC-DC is used for digital 3,3V supply and other DC-DC is used for analog 5V...
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