Forum Post: UCC3895 in parallel operation
Hi,I am developing for 6kW AC/DC power supply using UCC3895. The power supply consists of 3 phase 220V AC/DC rectifier and two 3kw DC/DC converters in parallel. When I tested 3kw DC/DC converter with...
View ArticleForum Post: RE: Buck PSU - 10~32VIN with FSW = 600KHz (TPS54240 / TPS63020...
"When the device is disabled, the voltage biased on the output should not feed back onto the input."That's really guaranteed? That is, if EN pin = logic '0' and VOUT is externally biased with 5V, there...
View ArticleForum Post: RE: Problems with using bq25504
Which schematic in the datasheet? What is the open circuit voltage and short circuit current for your solar panel? What is the VBAT_OV per your resistors? Keep in mind the following: If VIN_DC is...
View ArticleForum Post: Question about SM72445 Evaluation Board
I'm design a circuit using SM72445. I refer to this document http://www.ti.com/lit/ug/snva649/snva649.pdf.- I find that some components such as L2, L3 aren't in figure 6 "circuit schematic" but they...
View ArticleForum Post: RE: UCC28600 burst mode operation
Only by adding a preload; of course this will impact your overall efficiency. You can add an offset to CS, controlled by STATUS, that will basically kick the converter out of burst at a lower power...
View ArticleForum Post: RE: LM25069 protection for rechargable battery input
Negative current flow through the shunt should not pose a problem for the LM25069. However, we have not tested this mode of operation. Regards,Timothy Hegarty
View ArticleForum Post: RE: CURRENT-LIMITED LOAD SWITCH for MicroSD card
Hi Ruslan, Please browse through our load switch portfolio. In particular, the LM34902 and LM34904 are current limited PMOS load switches rated for 0.3A and 0.5A, respectively. These are provided with...
View ArticleForum Post: BQ34Z110
HalloWe are developing as system around the BQ34z110 Gas gauge the system DC Link voltage is 48-60V this should be fine for the BQ device however we have vehicles that runs on 72V nominal DC link...
View ArticleForum Post: RE: DCR010505U - heat and no output.
I reviewed the schematic. The capacitor C70 must be directly connected to Pin12 Vrec. Remove R 87 and short out its terminations(0Ω)DCR internal linear regulator does not function when the Vrec pin...
View ArticleForum Post: RE: NEED INFORMATION--LMZ12001EXTTZE/NOPB
Hello Jayakumara, Here is a link to the datasheet: http://www.ti.com/lit/ds/symlink/lmz12003ext.pdf1. Junction Temperature Max (Tj Max)125C operating. See page 4 of the datasheet. 2. Typical Power...
View ArticleForum Post: RE: LP3892IMM-3.3/NOPB output issue
I have no direct experince with TPS78833, but a search of this Linear Regulators forum shows no complaints, so that's something.
View ArticleForum Post: RE: Fly-back transformer design for Critical Mode operation using...
Just in case...here's the pdf of the MathCAD file.
View ArticleForum Post: TPS2376-H versus TPS2378
TI Team,I was wondering if I could get your opinion on the following.I currently have the TPS2376-H designed into my circuit using the evaluation board reference design. I've added ORing diodes to my...
View ArticleForum Post: RE: LM337 minimum drop out?
The LM337 is not a low-drop out regulator. The limiting operating factor is the minimum input-to-output voltage differential which is specified at 3V.
View ArticleForum Post: RE: Setting up Advanced bqMTester
Ok on the current discharge cycle (which should be the last) R_DIS bit has been set since the beginning, as has VOK and QEN. Both 'Absolute State of Charge' and 'Relative State of Charge' reached 0%...
View ArticleForum Post: RE: SM72442 and SM72295
Randall,I believe you are going in correct direction.You need to be sure the FETs are able to handle the current. I recommend 60 A FETs, with a minimum of 40 A.With the SM7442, look at the capacitive...
View ArticleForum Post: RE: TPS74401 pre-bias capable?
Hi George,Yes, this device can sink current when disabled. Checking this in lab, putting 5V at the output yielded 10mA which yields about a 500Ohm active pull down resistor (the current throught the...
View ArticleForum Post: RE: TPS3307 max Vin specification
Hi Cosmin,Yes, this equation is correct. Please see the below forum post that answers this...
View ArticleForum Post: UCC28600 Design Question
When I have done large scale modeling in the past for fix frequency PWM converters I have averaged them over 1 switching cycle to obtain a model that will provide losses of the various parts of the...
View ArticleForum Post: RE: [LM723] Re: Variable regulator with programmable current limit
Chaitanya,As far as LDO, we currently don't have a device that with customer current limit programmable feature. You can ask swich regulator group to see what options they have.What does your...
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