Forum Post: RE: Quad Port PSE Using TPS23841PAPR
TPS23841 can sink up to ICUT = 0.615A (typical) per port which translates to ~2.58W device power dissipation for 4 ports (including bias and quiescent dissipation). Theta JA is specified at 21.47C/W so...
View ArticleForum Post: RE: PFIN fault in bq20z75
Hi Shirley,Your PFstatus shows that the PFIn bit is being set indicating that the external protection device has blown the fuse due to a fault occuring. Are you using our EVM for this assesment or are...
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Forum Post: Reducing analog ground plane currents with LM2663 switched...
Hi,I am using the LM2663 to provide a negative power rail from a +5V supply. This is then passed through a -4.5 LDO regulator to create a create a clean negative rail for sensitive op-amps and...
View ArticleForum Post: RE: fuse nomarly blows after full reset
Hi Reuben,You will need to indentify what fault is causing the fuse to blow. Hook a scope to the output of your bq29XX and your gas gauge to a computer and with the help of our EVSW you can see what...
View ArticleForum Post: RE: battery does not charge to full
Hi Reuben,Connect your gas guage to a computer and with the help of the EVSW, this will indicate what is preventing your charge fet from being turned on.thanksOnyx
View ArticleForum Post: RE: BqGaugeStudio and BqCONFIG not worked with EV2300??
Hi BryanFor your 64 bit win 7 computer, install as an administrator the drivers from this link below. I use a 64 bit window 7 and the device works just...
View ArticleForum Post: RE: TPS63020 Incorrect Switching Frequency w/ Power Save Mode...
Great. Thanks for confirming that it switched at 2.5 MHz as it should.Yes, sufficient input capacitance to overcome the impedance of the input source is needed for any power supply. This can lead to...
View ArticleForum Post: RE: TPS40210 questions: Thermal pad, and Sub-Harmonic Instability
Anthony,Attached are the Rev3 layers and schematic. In the schematic design the FET was changed to TO-220 for power/cooling, and the inductor pakacge changed for a lower DCR.For the layers, I added...
View ArticleForum Post: RE: TPS386000 Power Down Sequence
Hi Davey,The TPS38600 does not have reverse order sequencing. They are 4 separate supervisors so you will need some external logic to do reverse sequencing. If power on VCC is removed, the RESET output...
View ArticleForum Post: RE: TPS62260LED-338 Eval board: Light blending and adjustment
- You could try wax paper or perhaps cut up a plastic milk container to make a lens cover diffuser.- In Auto mode, the color triangle is "traced" at a preset rate and you should see the color cycle in...
View ArticleForum Post: RE: LM5060 short circuit issue
Hi, could you send the LM5060 portion of your schematic so further internal review can occur? How did you confirm that LM5060 was not turning off it's output? Did you monitor GATE and GATE was not low...
View ArticleForum Post: RE: Power for Ultrasound
What are your input voltage, output voltage and output current requirements? What are your specs for ripple, EMI and transient response?
View ArticleForum Post: TPR400090 Buck Regulator
Currently we are designing the Power supply section one of the Board, My requirement is 12V input, 1.2V output, 120Amps current required.One the Chip is utilizing up to 2A, these kind chips have around...
View ArticleForum Post: BQ24090 CHG Doesn't go low
Hi,My ISET is 1K to Gnd, PRE-TERM is 2K to Gnd, no NTC so TS is 10K to Gnd. ISET2 is 10K to OUT. So when USB is connected, voltage measurement on Vin is 4.99~5.00v. OUT is ~ 3.97v. LED to CHG is not...
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Forum Post: RE: Can the UCC28950 be scaled to a 6kW supply?
Hello Mr Souza,Are you using the recommended high voltage circuit for high voltage outputs, in the data sheet.The base of the NPN is at a fixed DC level, so Iadj from pin 5 will be equal to the current...
View ArticleForum Post: RE: BQ27541-v200 Internal Temperature Sensor
a) This internal sensor has not been characterized since the accuracy is not critical. You can likely expect within 5C across a 0C to 60C temp range.b) There isn't a need to calibrate the internal...
View ArticleForum Post: RE: LM350AT Operating Temperature
The Operating Temperature Range of the LM350AT is −40°C to +125°C.The 0 to 125 temerature range stated in the LM350 datasheet Package Option Addendum (i.e. page 17), and in the LM350A Product Folder...
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Forum Post: RE: Trimming the LMZ22003
Amy, the LMZ22003 uses an external divider compared to a 0.8V internal reference.You should be able to vary RFBB by injecting a current offset into it by your external 0-3V signal.
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Forum Post: RE: TLC59284 Detailed Thermal Information
Comparing the TLC5967 DBQ package and the TLC59248 DBQ, it appears the TLC59248 THja was derived with a 1 sided board.TLC5927: 99.8 C/W single layer JEDEC standard.TLC59248: 91.5 C/W is very close to...
View ArticleForum Post: RE: LM2611 layout guidelines
The LM2611 was designed to replace the LT1611 in HDD MR PreAmp applications. You should have no problems if you follow the LT guidelines on the LM2611.
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