Clik here to view.
Forum Post: TPS40210, overcurrent/duty problem
Spec: 9V in, 80V out @ 40mAI used webbench for the design, The first problem is that it has trouble starting, since very quickly after it starts current overprotection kicks in and PWM turns off while...
View ArticleForum Post: RE: TPS54325 Odd Enable Reaction
On a side note, one of the 2 boards that we built I can't get the 5V rail to come up. The incoming ferrite bead has been removed and replaced with a jumper wire (it didn't come up before doing this...
View ArticleForum Post: RE: TPS62090
It's just a buck converter, so the output voltage ripple can be reduced by increasing the inductance and/or output capacitance.You can measure gain and phase with this app note:...
View ArticleForum Post: RE: UCC28600 - 110V, 1A SMPS
What?!? The UCC28610 Design Tool still has problems opening? I am so very sorry...time to take more drastic measures to get to the bottom of this.In the mean time, here's what you should be able to see...
View ArticleForum Post: RE: unseal codes for BQ20Z70 from HP batteryes
I did mistake with my email, my email chipelect@inbox.ru . Could you resend codes. Thanks.
View ArticleForum Post: RE: SLUC146 and UCC25600
The switching frequency is controlled during the soft start by the soft start capacitance and the RT pin current. Then the output voltage is not only controlled by the transformer turns ratio but also...
View ArticleForum Post: any way in which we don't need REG to be configured ,just by...
Hi All ,I am evaluating BQ24193 as Battery charger IC. Its a Handheld application which would be capable of charging through USB2.0 and DC Adapter both.I have a query regarding Boost Mode.In the...
View ArticleForum Post: RE: LM2676 switching frequency
Hello Martin, If using standard capacitor will solve the switching frequency problem but the ripple is too high then you could consider a second stage LC filter even though at that point you will need...
View ArticleForum Post: BQ27541-G1 Training at High Charge Rates
The documentation for BQ Easy (http://www.ti.com/lit/an/slua597/slua597.pdf) indicates:"General Charge/Discharge Profile Advice:* CC/CV charge profile: In line with the above, make sure a CC/CV profile...
View ArticleForum Post: RE: LMZ10501SEE/NOPB Going Obsolete! - Replaced by LMZ10501SHE/NOPB
Excellent suggestions. I will follow up.I am sure other customers have the same issue, but not all of them come to E2E.Regards, Denislav
View ArticleClik here to view.
Forum Post: TPS23756 Problems, EVM design files
I'm currently trouble shooting a design based around the TPS23756. It is based on a mix of the various flyback reference design for this series of parts, and is to have an output of 5V/3A. The result...
View ArticleForum Post: Using the LM25011 in Current Limit mode
We would like to make a constant current source of nominally 1 ampere. Input voltage would be 12 volts. Output voltage would range from about 2.5 volts to 10 volts. Is it possible to use the LM25011...
View ArticleForum Post: RE: LM2940S-5.0 MSL Bake Time
Nominal thickness for TO-263 (KTT) is 4.445mm. I have to presume that if the package thickness was not compliant with J-STD-020 and J-STD-033 that a MSL could not be assigned by the Package...
View ArticleForum Post: LM1084 Adjustment pin bypass capacitor ?
I've built a simple linear regulator power supply using the LM1084ADJ. The input is 16 volts, the output is 13.4 volts, and the load is about 1 ampere. It works just fine with an unbypassed ADJ pin,...
View ArticleForum Post: RE: Peak Current Control Method, Valley current control method...
John,Thanks for your reply. I know there are ICs that can do both peak current and average current mode control, so I was tryting to find valley current control IC. Thanks for your help anyway.He, Siyu
View ArticleForum Post: RE: LM5025A Evaluation Board
Hello Kensuke,Thank you for your interest in the LM5025. The LM5025A eval board has been released several years and this is the first time the sync fet Vds voltage issue is reported.In the LM5025A...
View ArticleForum Post: RE: The difference between UCC28063 and UCC28061.
Please see attached power point slide.
View ArticleForum Post: RE: Need some clarification with buck regulators
Robbie,See if this helps you understand the topologies. The part you have choosn has boxes in the block diagram. There are older parts that have schematic diagrams inside that represent what is...
View Article