Forum Post: Why is UCC27200's HO always keep VDD ?
HelloI use IC(UCC27200D), input signal(pin5 and pin6) is connected to LM5037(pin13 and pin12), IC power is 12V, VDD capacitance is 1uF , HB to HS is connect 0.1uf ceramic capacitance, HO and LO is not...
View ArticleForum Post: RE: bq20z75 V160 DFI files......
Tom,Thanks a lot for your advise. I will use your procedure in our internal productin documentation.(Before export / edit / import the 'gg file I just switch from Norwegian regional settings to English...
View ArticleForum Post: Battery Charger Search
Hi,I am looking for Li-ion (Single Cell) Battery Charge Management IC, please kindly help to recommend.Features:a) Adapter/USB Inputsb) Support more than 1.1A Charge Current, Charge Voltage: 4.2Vc)...
View ArticleForum Post: RE: Reading the cell impedance growth-rate ratio counter
Hi TomI have disabled this function. Ive had a look in bqWizard and cannot seem to find where to read this parameter. Can you be more specific. Thanks.Stephen
View ArticleForum Post: bq24079 / Operation from 5V Vbus
Hi,Our customer plan to use bq24079 from 5V Vbus and then I have some concerns for this operation. Can you comments for my concerns as below?1, bq24079 can not regulate Vout(reg) of 5.5V from 5V input,...
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Forum Post: TLC5920 LED matrix display problems
TLC5920 LED matrixdisplay problems. Figure1 is idealLEDmatrixdisplay. But the test resultsasFigure2,thered LEDlight leakageinS13-S15.Thanks for your support ~~Figure 1Figure 2Application...
View ArticleForum Post: RE: TPS65910 series resistor with supercap
Hi Peter, I'm going to move this to the Power Management forum. They will answer this better than us.
View ArticleForum Post: RE: PMBus C source availability
Are you looking for the external control software code? Which software are you using?
View ArticleForum Post: RE: TPS61200
It looks this got swapped a few months ago in the last D/S update. The pin table on page 4 is backwards. PS = high = power save disabled.
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Forum Post: RE: strange H-bridge driver signal for UCC28950
Dear Flavio,There is visible instability of my solution and something that I don't understand. I have same duty cycle (second picture), but current is changing/rising with visible delay and this cause...
View ArticleForum Post: RE: TPS7A8001 power down waveform
Hi Vincent,Yes, EN is shutdown when VEN is below 0.4V. Please see below shutdown waveform.(Please visit the site to view this file)
View ArticleForum Post: UCC2897 / Pulse skipped at high Vin and no load
Hi,Now our customer is evaluating UCC2897 with forward configuration. But they confirmed pulse skipped operation at high Vin and no load condition. Can you give your advice why this phenomenon is...
View ArticleForum Post: RE: Ultra-wide input, isolated, 200W DC-DC Converter - topology?
Norman,At 200W I would stay away from a Flyback, and with VIN 9V I would stay way from a Forward converter. I would start out with a Half Bridge. In your email you said you could not get more than...
View ArticleForum Post: RE: LM3448 Output power
Try getting the Clipsal KB31RD400 dimmer to work with
View ArticleForum Post: RE: application note for a switcher with adjustable output...
Hi James, We have several parts that will work in this range including the LM22678, but I need some more information. What is your input voltage range?Do you need specific functionality like, soft...
View ArticleForum Post: RE: LM3409 analog dimming issue
It's the same schematic as Design Example #2 on page 29 of the datasheet, with the exception of the input voltage being in the range of 15-18V. For now we are just placing a 333Ohm resistor across the...
View ArticleForum Post: RE: bq27500 evm stopped responding to I2C
Helloi had the same problem, i load (for a terrible mistake) the dfi of bq27545on my bq27500.Also my evm stopped to communicate , is there any way to reload the right .dfi?If not how is possible that...
View ArticleForum Post: RE: PWM using UC3824N Chip
Jordan10 to 30 sec correct operation sounds like a thermal issue.John
View ArticleForum Post: RE: Powering the ISO124 with UCC2808
We have an SN6501 that is design just for this small isolated output needed for the ISO devices.It also explains the topology in the data sheet.http://www.ti.com/product/sn6501
View ArticleForum Post: RE: TPS63060, failing when hooked up to +12V gel cell battery
Battery's voltage is +12.71 V and the power supply is at +14.00 V. It is interesting that the fuse(0.5 A) also blows. However the processor and the rest of the circuit which all together draw about 1mA...
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