Forum Post: RE: TPS2113A
I unloaded it and it now outputs 4.9V. The stat pin is still 0.7V though and the IN2 pin is 0.5V (not connected). I found out that I possibly have a malfunctioning TPS63001. If the input is ~2.6V the...
View ArticleForum Post: RE: LM2940 stability
Yes, same Cout ESR requirement can be used at Vout=12V.
View ArticleForum Post: RE: Boost convert with variable output controlled by uC
Hi Mehdi,How about using the digital potentiometer in place of the resistor from FB to ground? This way the resistor will only have the reference voltage across it.I have not worked with the LM3478 or...
View ArticleForum Post: RE: TPS40170 start up issues
Hi Ramnath,Good to see you have had some improvement.Is there only the 2 ceramic capacitors shown on the schematic and can you share the part number for them? This reference design uses an LC filter...
View ArticleForum Post: RE: LMR62421 Boost
Hello Denislav,Yes have all sense ..You are right, is exactly it what is happen in the circuit. I will need put Fet to provide a True-Shutdown.RegardsFabio Boaretti
View ArticleForum Post: RE: Cannot put LMR62421 in Shutdown Mode
Richard,Thank you. You are absolutlly rigth. I will need a Fet to complete my circuit and have a True-Shutdown.Thank you for you reply !RegardsFabio Boaretti
View ArticleForum Post: RE: BQ24650 INPUT SOURCES
Yes. Note that the charger is a buck converter so you can only charge a single series cell.
View ArticleForum Post: RE: LM5576 Problem
Hello Harl,In my previous email I sent you a presentation on EMI and ways to mitigate EMI using good practices in board layout. In that presentation, on slide #58, there is an excel spreadsheet...
View ArticleForum Post: Evaluation BOARD SM72445
Dear Florent, I'm working with and sm72442 sm72295 and'm with some doubts. first question: Is it possible to make the measurement of output current buck-boost converter with sm72295 and also use as...
View ArticleForum Post: BQ2004E Temperature sensor failing
Hi!I'm using a BQ2004E and I'd configured the IC to work on mode Mode 1 and VSEL=0, charging a NIMH 9.2V battery. The TM pins configuration is: TM1=0 and TM2=1.The Temperature sensor was calculated, to...
View ArticleForum Post: BQ76925 EEPROM
I'm using a BQ76925 for power management/monitoring. Everything seems to be working fine except that when attempting to access EEPROM addresses, the chip responds only occasionally, and then only with...
View ArticleForum Post: RE: Bq2004 EVM components R13, D8, and gate driver
Most switchers what to turn the POWER FET on hard (fast). You will notice the resistance on the input is high about 5K. This will soften charge / discharge of the MOSFET giving you a long time to get...
View ArticleForum Post: RE: LiPO battery to power ARM M at 3.3 volts
Yes, the TPS630xx family is a great option to provide a regulated output voltage with an input voltage that goes both above and below the desired output voltage. They never operate in LDO mode, but...
View ArticleForum Post: RE: LM3478MM DRAWS EXCESSIVE CURRENT WHEN Rfa RESISTOR IS CONNECTED
Hi Chandrasekhar,Are you starting with a 3A load? If you want 3A out at 12V you are going to need more than 1.5A input current.Power_Out = Power_In *Efficiency ==> Current_In =...
View ArticleForum Post: EVM for BQ27520-G4 Fuel Gauge
My company is considering use of the BQ27520-G4 Fuel gauge, and we had planned to buy the BQ27520EVM to evaluate the part.My confusion is that there are four iterations of the BQ27520 part: G1, G2, G3,...
View ArticleForum Post: RE: specification of the transformer used in reference design...
I got this spec sheet from GCI. Hope it helps.-Tamil(Please visit the site to view this file)
View ArticleForum Post: Can LM5118/LM5118Q be used to design a battery charger from...
Can TI expert give me a comment if LM5118/LM5118Q be used to design a high power battery charger from different DC source. The power source may comes from any type of green energy like solar panel?...
View ArticleForum Post: RE: BQ24650 INPUT SOURCES
Thanks for your reply charles. We want to charge a 3.7V 2300mAh Li-ion battery.what wattage of solar panel will be apt to charge it?Any suggestions can you give to us regarding that?
View ArticleForum Post: RE: LM3478MM DRAWS EXCESSIVE CURRENT WHEN Rfa RESISTOR IS CONNECTED
Dear Tommy,Thanks for the reply. I am very sorry that there was some mistake in my schematic and after correcting the same I could be able to get the proper output. Sorry for the inconvenience. Now I...
View ArticleForum Post: Develop a system with panel solar and a battery charger
Hi,I've an electronic system with maximum consumption of 100 mA. It's an Wireless application with a battery of ion-litio (or ion-litio polymer) of 1000mAh.I need to provide this system of a panel...
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