Forum Post: RE: LM2941S 1A Low dropout voltage regulator
The original application had a feedback to the ADJ pin fdownstream of the OUPUT pin after the load.which essentially gave it the same function as the R2 so apparently in that configuration it was...
View ArticleForum Post: RE: UCC28600 Reference Design-PMP7115.1
Hi David, This design was done by a group in Germany, so it will be next week before I can get an answer about pcb/assembled board availablity. In the meantime, I will send to you by separate email...
View ArticleForum Post: RE: tlv1117-50cdcy excess heating
Veeresh,The power dissipated in the device is VIN*ICC+(VIN-VOUT)*IOUT = 12V*5mA+7V*250mA = 1.81WattThe heat needs to flow easily into the printed circuit board then the PCB conducts heat to ambient...
View ArticleForum Post: RE: TPS23753 Reference Design
We were not able to find an existing TI (or NSC) reference design using this PN listed. You might try contacting the local Pulse representative who can search their internal archives. I only found a...
View ArticleForum Post: RE: TLV1117-50CDCY It is excess the more heat when we are...
Link to matching thread.http://e2e.ti.com/support/power_management/linear_regulators/f/321/t/238467.aspx
View ArticleForum Post: RE: UCD90120A Monitoring uncontrolled power, & controlling ganged...
What I meant by "controlled by software command" was that I intend to send I2C commands to the UCD90120A to command it to turn on the power supply.I now have an eval board and, by trial and error,...
View ArticleForum Post: RE: Question about Thermal resistance value of TPS54228, TPS54428...
In general the thermal resistance from junction to ambient should be higher than junction to case. I suggest that you study the following document to understand the use and meaning of the thermal...
View ArticleForum Post: RE: Min On time of TPS40057
Hi Soo,The minimum controllable pulse width is 100ns typical and 150ns maximum as datasheet spec on page 4.Regards,Na
View ArticleForum Post: RE: LM5022 as SEPIC is burning FETs with load
Hello Mark,The interrupted ground plane can be a culprit for many issues. Your design is switching at 1MHZ frequency. An un-optimized layout at this high frequency can definitely cause the design to be...
View ArticleForum Post: RE: Setting up Advanced bqMTester
Yes bqEVSW software has the calibration step also but I figured if I I could do this calibration step with the bqMTester I wouldn't have to redo it in bqEVSW and I wouldn't have to worry about accuracy...
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Forum Post: RE: LM3447 VCC Overvoltage Protection
Here are some captures from my scope using a differential probe with a 50:1 attenuation. These were taken with Rdamp at 20ohms.Vcc at low load just before protection is triggered (effective V/div is...
View ArticleForum Post: RE: Buck PSU - 10~32VIN with FSW = 600KHz (TPS54240 / TPS63020...
I haven't worked personally with the TPS63020 recently but based on Figure 1 I think you will be fine with 1.8V input to 5.0V output at 205mA average current. If you operate below 1.8V the electrical...
View ArticleForum Post: RE: TPS55340 5V to 9V output current limited to 836mA
Jim,This does sound like it is likely the source of the issue. When working with any switching regulator it is tough to prototype without a surface mount board designed for the IC because layout is a...
View ArticleForum Post: RE: Buck with Dying gasp
Two of the bucks can be disabled to operate the device as a single buck with dying gasp. I'd reccomend you disable bucks 1 & 2, just running buck 3.
View ArticleForum Post: RE: VUSBIN.CAPOUT of TPS65951
Hi Alexis,We added a switch between CPOUT and VBUS and controlled the switch by software.By default, the switch is off which means VBUS is not connected to CPOUT. The voltage on VBUS is 0v and voltage...
View ArticleForum Post: RE: TPS40170 start up issues
Hi Ramnath,Looking at the screenshots it appears the TPS40170 entering current limit hiccup mode. Most likely it is falsely triggering the SCP. To remove this issue the use of a snubber and series...
View ArticleForum Post: RE: Setting up Advanced bqMTester
Thanks for the clarification.bqMTester is really not designed for single board evaluation use, the settings are expected to be tweaked multiple times with statistical data before it is finally...
View ArticleForum Post: How to prevent the interference from DC/DC converter?
Dear Friends,When I assembled the digital board with the DC/DC converter together, the converter will interference the digital board. This makes the performance of the design degraded dramatically....
View ArticleForum Post: RE: bq78pl116 design capacity
GaetanoI checked with the firmware team and these features were never implemented in the firmware. They are not going to be available for use.RegardsTom
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