Forum Post: RE: LM5017 Power up Issue
Hi Vijay Thanks for getting back to me. It is powered by batteries, so there is no serge from that side. I do think that it was caused by a spike that the LM5017 may have created during its boot...
View ArticleForum Post: LM3242, LM3243 etc...RF DCDC / Current limit and themal protectin
Hello, Could you please kindly let me know below information ? 1.Are Current limit function and Thermal Protection function same function in LM3243 and LM3263 ? 2.Does enable current limit in the...
View ArticleForum Post: RE: TPIC74101 analysis with webench
There is probably enough information in the datasheet to design your own circuit. If you have questions, please post them.
View ArticleForum Post: RE: TPS61040，TPS61041/About the difference between TPS61040 and...
The only difference between the devices is the Rdson and current limit, as previously stated. Since the device works by ramping up the inductor current to the current limit value during each switching...
View ArticleForum Post: RE: BQ2002G : Maximum allowed sink current at CC pin?
In the data sheet it has a maximum of 500uA, with a 5V input.I do not have anymore information available to me, so I would check and load it with a 5k resistor to 5V and see how much current it pulls....
View ArticleForum Post: SMPS 28VDC@4 amps
Hi all,I am looking for a reference design(schematic+BOM) for switch mode power supply(SMPS) with the following specifications and having LOW BOM cost.Input voltage: 230V AC, 50HzOutput voltage: 28V DC...
View ArticleForum Post: RE: TPS2540 – Can TPS2543 use only " USB charging port...
Hi,Milo Thank you for your prompt reply.I’m sorry. The specifications of my customer were changed.My customer fixes CDP mode.There is not a mode change.Is the discharege function unnecessary?(Please...
View ArticleForum Post: RE: TPS51200 VO and REFOUT ERROR
Hi Jacky,It is strange. Could you please send your schematic for review? If the schematic is correct, I just think about the flux contamination underneath the IC. You can clean the board around those...
View ArticleForum Post: RE: BQ771800 / BQ771801 / BQ771802 / BQ771803
This is a three-terminal fuse.See:Battery Circuit Architecture, I. TYPICAL BATTERY CIRCUITRY FOR A LI-ION BATTERY PACK by Bill Jackson: http://www.ti.com/lit/ml/slyp087/slyp087.pdfIEEE Xplore, The...
View ArticleForum Post: RE: LM3429 LED driver - analog dimming and LED string length
A couple quick comments: You have chosen the Boost configuration this will be fine for 8 to 10 LED's for a max input of 24 vdc.For 3 to 7 LED's you will need to switch to the buck/boost configuration....
View ArticleForum Post: bq26231 Datasheet Pinout Errata
Hi,I wanted to bring it to your attention that SR1 & SR2 have different pinout locations on Page 1, 2 & 6 of the datasheet for the bq26231.I also want to make sure that the correct pinout is...
View ArticleForum Post: problems with DCDC2 of TPS65023
Hi!We are using TPS65023 with OMAP-L138.The input voltage is 5V.The DCDC2 converter is ajusted to 1.8V - it means what DEFDCDC2 is connected to ground, but we have 5V on output(VDCDC2).DCDC1 and DCDC3...
View ArticleForum Post: RE: Full charge capacity for bq34z100
MichaelThe DataRAM screen shot indicates that you do not have Impedance Track enabled, so gauging will not work properly. You will need to issue an IT Enable (21) command by typing a 21 into the...
View ArticleForum Post: RE: About TPS2543
I have been testing the TPS2543 eval board with a Nook Color. In DCP auto detect mode, the TPS2543 seems to continuously cycle modes causing the PD to cycle between charging at 1.5A and 500mA...
View ArticleForum Post: RE: Inquiry regarding LM3404HV output protection
The evm as configured provides for open circuit protection with the addition of Z1 and change of value for Rz to a 1kohm. Z1 value needs to to greater than 40 vdc and less than the 48 vdc and should...
View ArticleForum Post: RE: USB
Would you recommend a different chip if only DCP_auto mode was needed and data pass through is not required?
View ArticleForum Post: RE: LP8543 initialization example
Sami,Thank you for the example. For my application I will be using Display 2, but without ALS. So adapting your example, I would do:Address Data Function08H 1DH Set Display 2 at...
View ArticleForum Post: LP2951-50DRGR reference design circuit
Could you provide the LP2951-50DRGR referecne design circuit to me?Since I can't find it on TI website.best regards.jin
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