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UCD90120A: Extracting the FAULT LOGs from Intel HEX configuration file via TI Fusion software

May 13, 2019, 2:33 pm
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Part Number:UCD90120A

Hello

- We would like to extract the fault logs from a master/slave UCD device pair which are only remotely accessible. 

- We are able to export the configuration files of these UCD devices into Intel HEX format . 

- Next, the configuration files are imported into some local UCD devices which are accessible in our own lab.

- During the TI Fusion Digital Power Designer Device Configuration Import step, when the Data Flash Import happens, the log reports that "Clearing data flash logs...".

- Therefore, all the fault logs stored in the configuration file, exported into the Intel HEX file, are lost when read back by the TI Fusion tool.

- Is it possible to disable the "Clearing data flash logs..." step in the import script of the TI Fusion Tool?  Please advise.

Thank you and best regards, Peter.

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BQ34Z100-G1: GPCRA0 and GPCRB error when using Lead Acid PowerSonic PS-1250 12V 5Ah battery

May 13, 2019, 2:44 pm
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Part Number:BQ34Z100-G1

I get attached errors when submitting attached GPCRA and GPCRB files.

Battery is lead acid so using C/20 discharge rate. Could this be source of error? Any ideas?

https://www.power-sonic.com/wp-content/uploads/2018/12/PS-1250%20technical%20specifications_US.pdf

GPCRA Error

0
Warning: Voltage under load 2303 mV is higher than OCV 2137mV. Please check correctness of your chem ID.

GPCRB Error

Error: Computation was not successful, but the specific reason was not identified.
       Please check that all files are prepared according to the documentation.
       The support personnel have been informed

(Please visit the site to view this file)

(Please visit the site to view this file)

(Please visit the site to view this file)

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24V Load Switch

May 13, 2019, 4:15 pm
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Hello, 

I am looking for a load switch to use with DRV8872 motor driver in order to turn on/turn off 24V rail to the motor driver and in turn, the motor. However I cannot find any load switch rated for such a high voltage. Are there any 24V, 3A max load switches available or something of similar application?

Thank you.

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BQ24297: Current limiting method for cable connections without D +, D-.

May 13, 2019, 4:50 pm
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Part Number:BQ24297

Hello
Currently, customers are applying circuit design with BQ24297.

condition
1. When a USB D +, D- line cable is connected to the product, the product recognizes it as USB and current limit is 500mA.
2. When connecting only the power cable without USB D + and D- line, the current is limited to 500mA while recognizing the product as USB.
3. When connected to Fast Charger adapter, it recognizes as adapter and confirm that it is charging without limitation to 2A.

Can I change the current limit when connecting a power cable with no USB D + or D-line in # 2?

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TPS65218D0: Replacing B1 version

May 13, 2019, 6:03 pm
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Part Number:TPS65218D0

Hi,

My customer is considering to replace the TPS65218 from "B1" version to "D1" version.

Can they replace directly?

In other words, is the schematic required to change?

Below workarounds are not implemented.

  1. 100-300pF capacitor, or
  2. Schottky diode, AND
  3. improved layout at the DCDC4 output cap (multiple vias & optimal component placement)

Best Regards,

Kuramochi

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TLV759P: operation mode in startup with soft-start

May 13, 2019, 6:09 pm
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Part Number:TLV759P

Hello,

 

This device has internal soft-start. Is it “constant current operation” during startup with soft-start?

 

thanks and best regards, Katsu M

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TPS63030: Quescient current of TPS63030

May 13, 2019, 6:10 pm
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Part Number:TPS63030

Hello,

I'd like to ask whether TI has a buck-boost regulator similar with TPS63030 but with lower quiescent current value? Picture below is cut from TPS63030 DS.

Considering a battery with 17Ah capacity, 10 years service life, the energy consumed by TPS63030 is 35uA * 24 hours * 365 * 10 / 1000000 = 3.07Ah, about 20% total energy.

Regards,

Ma Dawei

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LM5118: Can LM5118 be used in a open-loop state?

May 13, 2019, 6:37 pm
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Part Number:LM5118

Since my application is used in a constant 24V input voltage, can LM5118 be used in a open-loop condition?

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BQ24210: Limit Solar Panel Voltage

May 13, 2019, 6:45 pm
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Part Number:BQ24210

Hi

I need to limit the Solar Panel output voltage to 7V in order to avoid the OVP protection. The nominal voltage is 6V, but it can reach more in ideal sun light. 

Can I use an LDO to perform this task? The max current is 500mA. Can you recomend the best device?

BR

Gilberto

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TPS61021A: Minimum negative voltage rating for short spike

May 13, 2019, 6:55 pm
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Part Number:TPS61021A

Hello,

Do you have minimum negative voltage rating for short spike?
The SW node may have short spike less than -0.3V.
I hope like the following information of TLV62085, for example.

Thanks in advance.
S.Sawamoto

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LM5041EVAL: PCB Layout Considerations

May 13, 2019, 6:57 pm
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Part Number:LM5041EVAL

Dear Sir,

Could you please share the gerber file for the LM5041EVAL board (AN-1299) so that I can see the PCB layout with more clarity.

Regards,

Nesh

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TLV743P: Device Marking for SOT-23(5) package...

May 13, 2019, 6:58 pm
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Part Number:TLV743P

Hi,

Where can I find the device marking for the TLV743P SOT-23(5) package?  The datasheet and website seem to only show how the X2SON (4) packages are marked with a couple exceptions. 

We have some SOT-23(5) parts marked 1DDT, and we need to double check that they are indeed TLV74325PDBVR (2.5V).  

And we also have some other parts / voltages in this family, so we would like to find a complete chart or a key to decode the markings.

Thank you,

Bob

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LM5119: HICCUP mode

May 13, 2019, 7:02 pm
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Part Number:LM5119

Hi

I'm testing a dual BUCK(13V,18V) by LM5119.

There is no problem with 13v but 18v start a hiccup at no load.
Looking at the data sheet, there seems to be only an over current related to the hiccup.
Can you be a hiccup for another reason?

-test condition

2-ch Buck(LM5119)

  1. Input: DC 66~100V

    Output: DC 13V / DC 18V

            DC 18V 1A(typ) / 11A(peak)

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TPS3808: Reset Timing

May 13, 2019, 7:58 pm
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Part Number:TPS3808

Hi , 

While  referring to the TPS3808 reset  timing diagram on Page 7 of datasheet, require the following clarifications.

In the design VDD is set to 3.3V and VIT is 1.2V.

 1.Should the VDD be Vddmin(1.7v) before  VIT+hys (sense threshold)

2.Is it Ok for VDD to be 3.3V within the reset duration. In the design when sense reaches VIT , VDD does not reach the 3.3V.

3. Once VDD is >1.7V and then Reset logic depends on VIT. Once sense pin crosses VIT , then there shall be user configured reset delay independent of Vdd and VIT power rails. Please confirm.

4.Does the MR pin accept pulse of 100ns.  In datasheet it is mentioned as 1ns (min) . Please confirm.

 

 Your quick response is highly appreciated.

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CSD15380F3: CSD15380F3 IC bake question

May 13, 2019, 8:04 pm
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Part Number:CSD15380F3

Hi TI, 

Could you help to provide the related document of baking IC criteria for CSD15380F3 ?

For example, like temperature setting and baking time.

Thanks !

Henry Cheng~

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UCC2818: UCC2818 - Build common voltage regulator for two chips

May 13, 2019, 8:06 pm
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Part Number:UCC2818

Hi Team,

I need to build two phase PFC from two separate secondary windings of the three phase transformer.

The third transformer phase is loaded and cannot be used.

I use two PFC preregulators UCC2818– one for each phase. How can I build common voltage regulator for two chips?

I am waiting for your answer.

Thanks,

Shlomi

 

(Please visit the site to view this file)

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TPS24750: constant current limit feature

May 13, 2019, 8:16 pm
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Part Number:TPS24750

Hi Team,

My customer wants to limit output current at 100mA when load current increases more than 100mA.
He wants not to set fault timer, it is required that 100mA is continue to flow forever until output current decreases below 100mA.

Is the feature possible for TPS24750?
If the answer is no, I would like to know if there is TI device that meets the requirement.
Input voltage is 9V in this case.

Best Regards,
Yaita

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Linux/TPS61194: Linux and Android Driver for TPS61194

May 13, 2019, 8:55 pm
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Part Number:TPS61194

Tool/software: Linux

Hi we are using TPS61194 for one of our Android project, please help to share the Android and Linux driver for TPS61194  for Integration process.

Thanks

Mitun

7899111606

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TPS92692: reference design of 24Vin, 30~50Vout/10A current?

May 13, 2019, 9:30 pm
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Part Number:TPS92692

Dear TI Experts,

My customer has a requirmnet of 24V input, 30~50V output, 10A current boost LED driver, is it possible to use 2 paralleled  TPS92692 to make it?

If yes, could you kindly help to provide a similiar design to start? If no, could you kindly advice other solution for this requirment? Thanks a lot.

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LM2665: is external diode for start up necessary?

May 13, 2019, 9:47 pm
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Part Number:LM2665

Hello Team,

One of my customer was using TC1240AECHTR which does not require external diode for start up. We suggested LM2665 as an alternate which has same pin out. however, as per LM2665 datasheet, it requires a general purpose diode for startup between Vin & Vout PINS 1 & 5.

For the LM2665M6X/NOPB, customer tested without the diode, the preliminary results are fine on the IC (3.3V input got doubled to 6.6V on board the driver under test).   

But, we would like to know if this GP diode is compulsory/mandatory for the device operation or it is recommended as precautionary.  

Our observation is that even without the diode the voltage double works, but if it is mandatory it may have some negative effect on performance.

Or what could be the adverse effect of not using it over the lifecycle of product as every startup sequence may require it.

 Please look into the exact purpose of the diode as even without it doubler is working (may have some other effect, unknown at this moment to us).

Regards,

Mahendra

 

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