Forum Post: LM3409HV: wide-short-wide pulses at switch node
Dear LED Forum, I´m working on an LM3409HV circuit that always drives 12 LEDs at around 35V at 330 mA, switching at a theoretical 330 kHz and an input voltage of 48VDC. The trouble is that the...
View ArticleForum Post: TPS65381 - Watchdog related issue
Hi, Iam using TPS65381 in our application, Through SPI , Im trying to configure the registers of TPS65381(In diagnostic mode) based on our application needs But before that itself , It is going...
View ArticleForum Post: The ripple level of the output voltage by the TPS63021 reference...
Dear All,Please teach us the spec of TPS63021's ripple level.By the setting of a reference circuit listed in P12 of the TPS63021's data sheet,how much level does the ripple of the TPS63021's output...
View ArticleForum Post: RE: Switching Voltage controller
What is the minimum and maximum battery voltage?
View ArticleForum Post: RE: TPS54239 - Ringing on 5V output
You are seeing ring ringing voltage from the switching node. You will find that layout and tight grounding are essential for proper performance. I would suggest teh you order the EVM to evaluate your...
View ArticleForum Post: Perform Open Circuit Voltage Reading -- bq20z65
Hello!In the documentation, it says that in order to update QMAX and reduce the max error, we need to perform two open circuit voltage readings. There is no documentation on how this should be...
View ArticleForum Post: PoE PSE Isolated DCDC Converter 12V/48V
Hi,i need a power supply for a PSE (802.3af) with 4 Ports (~60W). If i'm right, the power supply and thePSE part has to be isolated to the rest of the cuircit (NIC etc..). 12V are available, but i...
View ArticleForum Post: RE: Power switch
Please have a look at TPS211x/TPS211xA (x=0,1,2,3,4,5) which are power mux parts for applicaitons like this.
View ArticleForum Post: 1W Dimmable LED driver solution
Hello,I am looking out for a 1W LED driver solution with dimming capacity.Minimum of two-stage dimming is required.Operational input voltage is 1.2V to 3.0V.Which chip could be the optimum...
View ArticleForum Post: Beagle Bone + TPS65217 query
Hi TI ,I have a few queries on TPS65217.1.In page 20 of TPS65217 data manual , it is said that LDO_PGOOD output goes high when LDO1 and/or LDO2 are enabled . This is creating a lot of confusion .Is...
View ArticleForum Post: RE: TPS54425 / Voltage Feedback Input Threshold vs. Temperature...
Ill see if the data is available.
View ArticleForum Post: RE: TPS54340 use for "Synchronizes to External Clock"
Yes you are correct if you are driving the RT pin form a 50 ohm source clock. Other wise you should change to the appropriate load termination for your clock. Hi-Z clock can drive just the RT pin...
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Forum Post: UCC28811 switch off at low line
Hello,I designed a single stage PFC LED-driver with a UCC28811. I found that the input current has jumps around the zero crossing. I zoomed in on this in the below image.I found that these jumps are...
View ArticleForum Post: RE: LM3481 shut down not working
Hello TI support,can you please help me in this matter? I still have not solved this issue. The stepup is used to boost 12Volt to 24 Volts. all works well. but when I connect the SD pin to 5 Volts, it...
View ArticleForum Post: RE: Regarding to choose IC for Charger circuit and energy...
Look at the bq24192.
View ArticleForum Post: RE: Lm3881 Cadj mininum
Hi Owen,Did you ever get an answer to your question? What is the minimum for CadjThanks,Alex
View ArticleForum Post: RE: LM5009A as inverting output
The circuit looks ok, other than the bypass capacitor that John mentioned. The inverting converter has switching current flow from both input and output capacitors so good layout is essential for...
View ArticleForum Post: TINA TPS40055 Transient Reference Design
Hi, I downloaded the TINA file from the web site and simulated it.I want to see how current limit works in the circuit, but the circuit never go current limit even if using a small resistor between Vin...
View ArticleForum Post: RE: bq20z90 4s2p to 4s3p Reconfiguration Assistance
Cell phone jammer is an interesting and helpful device when we don’t want to be bothered by the cell phone noise. I just bought myself a cell phone jammer the other day ,it is working great and BTW,...
View ArticleForum Post: bq51050b charge full status
hi I have built a circuit based on BQ51050B with 75mAh li-ion battery for charging and so my R1 = 4.2k, Rfod = 200ohm (where Ibulk = 68mA which will be around 0.9C charging) and its working fine.I...
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