Forum Post: RE: bq20z95 accuracy at different discharge rates
ps start a different thread for it.thanksOnyx
View ArticleForum Post: RE: bq20z45 v 1.05 will not shutdown with command current is less...
HI Ken,Try to have your guage report zero current when you actually have zero current. Did you hit the CC board offset calibration button under the pack voltage and CC boad offset calibration section?...
View ArticleForum Post: RE: LM5001 design equations for 12V automotive application
LM5000 is suitable for SEPIC configuration
View ArticleForum Post: RE: North America power supply seminars 2013
I believe this happen once every two years so the next one will be in 2014.
View ArticleForum Post: RE: TPS2421-1 Short circuit and low resistance
Thank you for your response. I now know where the two volts comes from in figure 7. For my calculations I was using the ([Vin-Vout] x Ivout) = 5W and using I-Lim as I-vout. Equation 8 does give me...
View ArticleForum Post: RE: LM3488 SEPIC layout guideline
Dear Mr. Zuercher,Pleas find attached an app note for a similar device in SEPIC configuration. Board layout images are included for your...
View ArticleForum Post: Line noise and the emission noise of TPS62110
The frequency of the application is 500kHz ~ 1.7MHz, but I operate TPS62110 at 1MHz, and frequency is covered. Could you send me it if there is the document of a line noise and the emission noise of...
View ArticleForum Post: RE: bq20z45 v 1.05 will not shutdown with command current is less...
Have done multiple passes at the CC cal. Sometimes the current is shown 0, sometimes it is -3mA. But even if there is a -100mA draw, the current in discharge is always less than zero. We should be...
View ArticleForum Post: RE: bq24630 - P/G LED flashing during charge
What is the input votlage and battery voltage? Does the battery voltage reaches the charge voltage setting?If the battery voltage is very close the Vin, the charger may run into sleep mode or charge...
View ArticleForum Post: RE: Audible Noise from BQ500410AEVM-085
I get this same noise pattern on a Rx board I built, but it's on the receiver side (happens on a number of chargers). Does it have to do with the resonant capacitors not being the proper values? It's...
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Forum Post: RE: bq20z75 V160 DFI files......
Hi, Tom, I already have a production version .dfi file. We need make some modification of the configuration. I make the modification in .GG file. I imported the modified .gg file and "write all"...
View ArticleForum Post: RE: LM2675MX-5.0 Voltage spiking when Vin 16.2V
Hi Michael,The Abs Max input voltage on the ON/OFF input is 6V. See page 3 of the datasheet. Pulling ON/OFF to Vin through 10k will exceed this Abs Max rating and lead to your device malfunctioning. We...
View ArticleForum Post: TPS92510EVM Power up Failure
The documentation provides very little detail about bringing up the board. It says to connect the right LED load, apply ~48VDC to the input, and it powers up at full output drive current. However, it...
View ArticleForum Post: RE: TPS40195 / About resistor located between SW node and drain...
Hi Sonoki,The resistor in question (R4 in the schematic) is there to limit the current from the SW pin. Many devices are the same in this respect, that all pins are at voltages of zero or higher....
View ArticleForum Post: RE: Low noise Inverting Buck-Boost for light to medium loads?
Hi Anston,None of the converters you suggest would be appropriate, because as I stated in my question, I need to synchronize the converter to an external frequency source.I don't actually care much...
View ArticleForum Post: RE: LM25574 sync duty cycle
Hi Anston, thanks for your reply. Managing the voltage domains I'm not concerned about. However, I do need to find out about the duty cycle. The datasheet shows the sync pin being driven by a short...
View ArticleForum Post: RE: LMR64010
Hi Eli,There are several factors here. a) Layout can be greatly improved if the GND of the Cin and Cout were located close together.b) Ripple: High frequency Ripple: Replace Cap C10 from 100nF to...
View ArticleForum Post: RE: Dimming on both primary and secondary side using LM3445 or...
Hi Tim and thank's for a very quick reply,I think I have to use a different terminology, or rather better explain what I mean with primary and secondary side: Primary side is the wall triac dimmer....
View ArticleForum Post: RE: LM25574 inverting operating frequency range
Thanks--this makes a big difference for my application!
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