Forum Post: RE: TPS61052 low impedence path to ground failure
It looks like the device they are using is the TPS61025, not the TPS61052?As you may know, most failures with boost converters are layout related. They need to have a good layout, especially with this...
View ArticleForum Post: TPS53353 Circuit Design
I'm having difficulty getting the TI TPS53353 switching regulator working. I designed the circuit to produce a 5V output from a 15V input. Here are pictures of the schematic and layout ((Please visit...
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Forum Post: RE: The charge current decrease while charging a 2 nimh cell by...
Hi Charles Mauney,Actually I don't wanna use an external current source , I want use a simple voltage source switched to a current source controlled by bq2004.I based on the DV2004L1 :Fast Charge...
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Forum Post: RE: LM3488 soft start
Hi Jurjen,Thanks for pointing out the error. Watch out as there is also a typo with the superscripts for the s's in the last three parts of equation 7 that make them subscripts.When I put the equations...
View ArticleForum Post: RE: 51W PoE+ PD
Depending on how custom a system you want to make, you might also get some ideas here: http://www.ti.com/litv/pdf/slva498. This app note talks about the second implementation shown above.Phihong...
View ArticleForum Post: RE: LM5117 design from WebBench does not work as expected. Any...
Eric,I believe the one of the diodes specified by Webench for this design (Toshiba CMS06 VRRM= 30.0 V) does not have sufficient VRRM. The VRRM should be around 60V. I think there is abug in Webench...
View ArticleForum Post: RE: NexFET poower MOSFET SPICE models from TI don't work for...
Hi Touhidur,Thank you for your expedient reply! Increasing RELTOL seemed to fix the issue, also in capture version 16.3.Once again thanks for your help and I look forward to playing more with your...
View ArticleForum Post: RE: BQ27410 flash memory checksum
Hello Jared,We've just tried to get I2C data by using TI EVM board, and it showed the same array as yours [with '0x0A']. So, BQ flash data looks OK.In order to troubleshoot any possible I2C delays, I...
View ArticleForum Post: RE: TPS27081 , TPS22965 / Safe Operating Area
Ryuji,We are in the process of updating the TPS22965 datasheet with the SOA curves you are looking for. In the meantime, could you tell us about your application use case? What is the max ambient...
View ArticleForum Post: RE: LM5066 turn on time
I agree that there must be an issue with your prototype board. Is there a way you can order an EVM, modify per your requirements and retry? GATE is driven by a limited current source (~75uA) and can be...
View ArticleForum Post: RE: LMD register in bq2013h
Oh,,yeah...Thank Sir very muchI understood.... GOOD LUCK everything.
View ArticleForum Post: RE: two LM5576 with sync connected - 32V with 5A output
Hello,It is possible to synchronize up to 5 x LM5576 together, with the one set at the highest frequency as the master, but they will not current share. So their outputs can't be tied together. They...
View ArticleForum Post: RE: bq51050b: most simple schematic
Thank you for the fast answer!How do I calibrate these resistors? At the moment we are using ROS = 42,2 kOhm and RFOD = 187 Ohm (188 wasn't available), just as recomended in the datasheet. Does that...
View ArticleForum Post: RE: LM5101A oscillates and burns up
Related to the size of bootstrap capacitor, the needs for the bypass capacitor should be low ESR and placed as close as possible to the driver.So a good choice is to place a ceramic capacitor near the...
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Forum Post: require help to solve LM5088-2 Output voltage switching noise
Hi,I have a LM5088MH-2 to step down 48V to 30V DC. However the output has a 3VP-P ringingI have used the webbench tool to come up with the values as well. I am not sure which part of my layout needs to...
View ArticleForum Post: RE: TPS61175 soft start
Soft start for TPS61175 works differently than many converters. Normally the SS voltage will be a non invering input to the error amplifier and the output will track the lower of the reference voltage...
View ArticleForum Post: RE: 5V, 0.5A output from LM5010
We are using 12V to 60V as input voltage and have used the components as mentioned in the evaluation board for our board.
View ArticleForum Post: RE: LM2623 Voltage Ripple
Hi Anston,DId you ever build the evaluation board for the LM2623?Since we last talked, I ended up designing and building a board for the LM2623. I was able to significantly reduce the ripple by more...
View ArticleForum Post: LM1084-ADJ
I am using the LM1084-ADJ as current regulator for 4.2A same circuit as in the data sheet.. I notices that the Vin-Vout= should be more than 3V in order the regulator to function as current regulator...
View ArticleForum Post: RE: TPS23753 Startup waveform
The description starts on pg 15 of the datasheet (Startup and Converter Operation). There is a "handoff" between primary Vc and secondary (CTL) towards the end of converter start up. If the output...
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