Forum Post: RE: LM25117 PSU ISSUES
Hello Tommy,The PSU is 0-30 @ 3A :- thing that i have done which seem to improve a little;-I have removed the diode DVCC from VOUT that goes back to the VCC pin and the PSU is now stable, but still...
View ArticleForum Post: RE: TPS2394, Timing
Hello,thank you for reply.So I can assume that the figure of the current ramp is Ok, I can't?I still cannot understand the calculation issue, equation 4 in datasheet. Do you have any idea?Best...
View ArticleForum Post: RE: Split rail with asymmetric loads
I think I can just use flyback and/or buck-boost calculations. The feedback loop has bottom tied to negative voltage which complicates the system somewhat but the difference is worked out in the...
View ArticleForum Post: RE: TPS54426 Output Discharge control function
1000 uF is quite a bit larger than the recommended range of 22 to 68 uF. Have you checked the circuit for proper operation?
View ArticleForum Post: Checksum calculation for bq27425
Hi,I have a problem getting the checksum to match according to the calculation method described in the data sheet. When I read 32 bytes (all default values) from data class 82 offset 0, I get a...
View ArticleForum Post: RE: New design using PTH04230W
Guy:I reviewed the data above.. The scope bandwidth reommended for ripple and extraneous noise measurement is not more than 20MHz . The scope in this data is detecting E field noise ( which is not...
View ArticleForum Post: RE: tps2490 inrush current reduction
There are two ways: 1) The voltage setting on PROG can affect the turn on rate (higher voltages set higher charge currents and faster turn on time). But, do not set PROG below 400mV. PROG is ideally...
View ArticleForum Post: RE: LM5088 - stability question
Also, you can utilize bottom side of the PCB beneath the LM5088 as a thermal pad.
View ArticleForum Post: RE: LM5010A-RTN Pin
For further help with the LM339 circuit, it may be useful to post in LM339 related forum. They may be able to better suggest a workaround.Thanks and regards,Vijay
View ArticleForum Post: RE: TPS2511 Current limiter?
Set Rilim=44.2k for 5W and Rilim-22.1k for 10W apps.Remember that it is the phone that regulates the charging current (below ILIM). TPS2511 only acts as a limiter (above the ILIM set point). Try...
View ArticleForum Post: RE: UCD9090 input for power interrupt?
Hi Shashank,By loss of power do you mean the 3.3V power supply to the UCD9090? The sequencer can't be functional if it's input volatge falls below 2.9V. You can monitor this voltage and setup any...
View ArticleForum Post: RE: SMBus and PMBus interoperability
The GPIO's can be configured as an output for an event.UV under voltage can be measured on VMON and create a GPIO transition when the UV occurs.Just like a GPIO can be configured to go high when a rail...
View ArticleForum Post: RE: TPS2511 Charging
Your understanding of TPS2511 and TPS2543 are correct along with the devices that they support. For TPS2511, can you install 2x SPDT switch (such as 2x SN74LVC1G3157DBV or 1x TS3A24157 ) between a...
View ArticleForum Post: RE: LM-5010 RTN PIN
This question is a duplicate of another, newer post. The comments and solutions can be found on at the following:http://e2e.ti.com/support/power_management/non-isolated_dcdc/f/196/t/243973.aspx
View ArticleForum Post: How many DDR3 may I use with a single TPS51206?
I would like to operate two DDR3 using a single TPS51206 (termination and reference voltage only, of course). Is this possible? The DDR is Micron MT41J128M16HA-125 and we will be running at full speed.
View ArticleForum Post: RE: What battery charger chip should I use for a portable device...
Please check out bq24170. It is a 1-3 li-ion charger with 4a charge current . It should fit your battery requirements mentioned.
View ArticleForum Post: TLC5948
Hi,I m using TLC5948 LED driver, driving with stellaris LM3S9B96 . The TLC5948 Ic is not working in SPI mode. My code is as...
View ArticleForum Post: RE: Problem in tps54160
Ya Anthony, you are correct. i thought that was just input filter capacitor which we use in normal voltage regulator like LM78** series. OK I'll try that with ceramic one.But i used 68uh inductor...
View ArticleForum Post: TPS24700
The datasheet mentions a thermal pad on p. 22. Is this a typo, or does the DGK (S-PDSO-G8) package really have a thermal pad?
View ArticleForum Post: LM5118 and problem in high current
Hi,I designed a new layout in buck-boost mode Vin= 22-34V , Vout= 28V and Iout= 5AOutput voltage is true until the current is about 1A, But when the current be more than 1A output voltage reduce.When I...
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