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BQ24031: BQ24031 Regulation Current and Regulation Voltage conversion

November 19, 2018, 6:29 am
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Part Number:BQ24031

hi 

I have a problem with BQ24031 chip. it's two processes for charging, constant current  and constant voltage. However, the datasheet does not mention how many volts will be charged in the constant current and then transferred to constant pressure.In my product application, during the fast charging process, the current will decrease as the voltage rises to 3.85V during the constant current phase.  From the chip datasheet, the current starts to decrease at 4.1 volts. But, in my design ,the current starts to decrease at 3.85 volts.Why? This chip, the constant current conversion is changed to a constant voltage state, and the battery voltage value will be？ I need some help.Thank you .jinxing.wang

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SN74LVC1G08: Part marking

November 19, 2018, 6:36 am
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Part Number:SN74LVC1G08

Customer purchased the SN74LVC1G08DBVR from TI.  The device came with part marking C08J.  This is not listed as a valid part marking for this device.  Can you confirm which device uses this marking?

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CCS/UCD3138064: XDS100V2 Device Identification issue

November 19, 2018, 6:38 am
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Part Number:UCD3138064

Tool/software: Code Composer Studio

Gents,

My customer is using the XDS100V2 USB debug probe with the UCD3138064 and gets the following error:

 

ARM7_0: GEL Output: /nMemory Map Initialization Complete/nARM7_0: GEL Output: /tMemory Map Setup for Flash at Address                    0x0ARM7_0: Missing String property "FlashVerboseMode"

ARM7_0: Device Identification (DEV) 0x447F, Device is <unknown>

ARM7_0: Flash Programmer: Target configuration does not match the connected chip; expected:UCD3138064, actual:<unknown>

 

Communication works fine if replacing the chip with UCD3138064A and changing the project configuration from UCD3138064->UCD3138064A

 

Communicating with the UCD3138064  using the UCD3XXX Device GUI works fine.

 

Any hints on how to get the XDS100V2 debug probe to recognize the UCD3138064

 

Regards,

Anders

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TINA/Spice/TPS25924: Import downloaded PSPICE FIles

November 19, 2018, 6:39 am
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Linux/LINUXSDK-AM35X: bitbake-layers command broken

November 19, 2018, 6:43 am
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Part Number:LINUXSDK-AM35X

Tool/software: Linux

I have built the latest SDK from source per the website instructions, and I am able to successfully build the arago-base-tisdk-image.  However, as a next step I wish to customize my image, and as part of that process I have tried to use the bitbake-layers command, but I get the following errors:

~/tisdk/build$ bitbake-layers show-layers

OTE: Starting bitbake server...
ERROR: Unable to start bitbake server
ERROR: Last 10 lines of server log for this session (/home/nextmove/tisdk/build/bitbake-cookerdaemon.log):
    self.databuilder.parseBaseConfiguration()
  File "/home/nextmove/tisdk/sources/bitbake/lib/bb/cookerdata.py", line 316, in parseBaseConfiguration
    raise bb.BBHandledException
bb.BBHandledException
ERROR: Failed to obtain external Linaro toolchain version: Execution of '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc -v' failed: command not found
ERROR: Failed to obtain external Linaro toolchain version: Execution of '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc -v' failed: command not found
ERROR: Failed to obtain external Linaro toolchain version: Execution of '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc -v' failed: command not found
ERROR: Failed to obtain external Linaro toolchain version: Execution of '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc -v' failed: command not found
ERROR: Error: EXTERNAL_TOOLCHAIN path '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi' does not exist
ERROR: Error: EXTERNAL_TOOLCHAIN path '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi' does not exist

ERROR: Unable to start bitbake server
ERROR: Last 10 lines of server log for this session (/home/nextmove/tisdk/build/bitbake-cookerdaemon.log):
    self.databuilder.parseBaseConfiguration()
  File "/home/nextmove/tisdk/sources/bitbake/lib/bb/cookerdata.py", line 316, in parseBaseConfiguration
    raise bb.BBHandledException
bb.BBHandledException
ERROR: Failed to obtain external Linaro toolchain version: Execution of '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc -v' failed: command not found
ERROR: Failed to obtain external Linaro toolchain version: Execution of '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc -v' failed: command not found
ERROR: Failed to obtain external Linaro toolchain version: Execution of '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc -v' failed: command not found
ERROR: Failed to obtain external Linaro toolchain version: Execution of '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc -v' failed: command not found
ERROR: Error: EXTERNAL_TOOLCHAIN path '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi' does not exist
ERROR: Error: EXTERNAL_TOOLCHAIN path '/opt/gcc-linaro-7.2.1-ti2018.00-armv5-x86_64_arm-linux-gnueabi' does not exist

The processor SDK website instructs the user to get the linaro toolchain with the following command:

wget https://releases.linaro.org/components/toolchain/binaries/7.2-2017.11/arm-linux-gnueabihf/gcc-linaro-7.2.1-2017.11-x86_64_arm-linux-gnueabihf.tar.xz

I don't even see the missing toolchain available on the Linaro site.

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TPS782:

November 19, 2018, 6:44 am
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Part Number:TPS782

What happens to the output of the LDO TPS 78233 when the input voltage is lower than the regulator output voltage 3.3 V?
For example, when the input voltage is 2.5 V, how many VOUT voltages and What is the current limit at that time?

Best regards

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F28M35H52C: F28M35H52C but that could boot from XINTF (like Delfino 28335 and 2812)

November 19, 2018, 6:59 am
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Part Number:F28M35H52C

Hi,

We need a processor with ethernet (PHY could be external) like the F28M35H52C but that could boot from XINTF (like Delfino 28335 and 2812). According to datasheet the this concerto processor cant do that.

Is there an alternative to this processor that could do that ? Temp interval -40 to +85 (or +125C). Does not have to be dual core. We will only use this processor for maintenance ethernet tasks. Physical size should be as smal as possible du to limited space on the board. We will run all code from external memory so internal flash amount is not critical.

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AM3358: AM3358 ADC Sample issue

November 19, 2018, 7:01 am
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Part Number:AM3358

AM3358 At present, when we debug, we encounter a problem that the resistive touch screen is inaccurate. After the calibration, it is accurate. However, after the system restarts, sometimes the position will be offset!

Initially suspected to be the problem of calibration data, the latter debug found that the calibration data is OK; so we directly read back the ADC data, and found that the value of the ADC sample of the same position

am335x changed every time the system is restarted, I think Have you ever encountered such a problem on your side? The hardware uses the touch screen interface that comes with AM3358!, pls help check it and give

the solution how to solve it，tks！

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CSD19532KTT: absolute maximum ratings, drain-source voltage and power dissipation

November 19, 2018, 7:01 am
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Part Number:CSD19532KTT

Hi team,

Customer would like to confirm below two things. They would like to use CSD19532KTT  but found this will be broken by lifetime test. They would like to solve this break and has below questions.

1. CSD19532KTT is being used for motor application. And the drain-source voltage applied to this FET can exceed 100V during 3usec in a 50usec period. They would like to confirm whether this short time violation of the absolute maxim ratings are acceptable. Could you give any comments on this?

2. Customer would like to understand the definition of power dissipation of absolute maximum voltage. How should they understand this?

They are thinking like below.

Power dissipation should not exceed this value even for just a very short time.

or

This value is the power dissipation when the junction temperature will exceed a certain temperature at 25C ambient temperature. So this means it may be OK to exceed this power dissipation if the junction temperature doesn't exceed a certain temperature. They think that heat sink may help if the latter one is correct.

Regards,

Noriyuki Takahashi

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TLK10232: TLK10232

November 19, 2018, 7:04 am
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Part Number:TLK10232

With the TLK10232 working in 1GBASE-KX mode, is it fully compatible with SGMII (Serial GMII)?, and with SGMII transporting 100/100M ethernet? (it is 1,25 Gbps, 8b/10b coding)

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CC1125: Noise floor in Tx

November 19, 2018, 7:05 am
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Part Number:CC1125

Hi,

We have done some measurements at the RF output of the CC1125 in CW emission with 14 dBm output power.

We  have seen that the noise floor is 15 dB higher in the sub-1 GHz band than frequency >1 GHz.

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Is this normal for CC1125 ? Or maybe we have an issue in registers configuration or on our design ?

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PCM2903: Application about the PCM2903

November 19, 2018, 7:07 am
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Part Number:PCM2903

Hi team,

My customer want to use the PCM2903 to connect the 2.75mm earphone with microphone and USB interface of CPU in server.

1. So can you help to comment if the PCM2903 can support to translate the audio signal from the microphone of earphone?

2. If the PCM2903 can't support, which part will be a good choice?

Lacey

Thanks a lot!

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DS90UB953-Q1: DS90UB953 vs DS90UB971

November 19, 2018, 7:13 am
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ADS7029-Q1: IBIS model for ADS7029-Q1

November 19, 2018, 7:16 am
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Part Number:ADS7029-Q1

Hi,

The customer request us to provide IBIS model for ADS7029-Q1. Do you have its IBIS model or for ADS7029 may be acceptable.

Best Regards,

Satoshi

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AWR1443BOOST: AWR1443BOOST

November 19, 2018, 7:16 am
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Part Number:AWR1443BOOST

Hello, It seems mmWave Automotive radar kit AWR1443BOOST is out of stock again. 

Any information on availability times?

Thank you

Best 

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CCS/TM4C1294NCPDT: TM4C1294NCPDT

November 19, 2018, 7:18 am
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Part Number:TM4C1294NCPDT

Tool/software: Code Composer Studio

I am using CCS and I would like to write some code in assembler. I would need help to find a manual, as I am not sure what I found is good for my processor. Would you give me the link to the manual and maybe to the assembler itself.

Thank you

Charles

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Linux/AM3352: u-boot, floating point math operation...

November 19, 2018, 7:20 am
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Part Number:AM3352

Tool/software: Linux

Hello,

On my board I have few ADM1293 for power measurement, and i wanted to show power , voltage, current value at u-boot level. this requires some math operation. and in my calculation function i have some float - multiplication, division. 

When I compile code I get following error for float operation.

undefined reference to `__aeabi_f2iz'  ,  `__aeabi_i2f' ,  `__aeabi_fsub' ,  `__aeabi_fmul'  `__aeabi_f2iz'

I am using gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf tool  chain.

How to fix this one? Am i missing to link float library? my tool-chain support hard float point. is it possible to use soft float library? 

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TPS659037: I2C : re-map address to 0x5x?

November 19, 2018, 7:25 am
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Part Number:TPS659037

Team,

The SLIS165F datasheet says at page 56 Table 5-7 that each I2C page (Power registers, OTP, Interface and auxilieris) can be re-map to an other address:
http://www.ti.com/product/TPS659037/technicaldocuments

How can the re-map be done?
Is it by writing the ID_I2C1[x] bit to 0 or 1? But what if you can only talk to the TPS659xxx via I2C address 0x5x?
Can t be done by HW like pull up/down to fix the address to 0x4x or 0x5x?
Or is there a way to change the OTP config once to have a permanent I2C 0x5x address?

Thanks in advance,

A.

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LM5060-Q1: finding the best solution for high-side power switch control

November 19, 2018, 7:27 am
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Part Number:LM5060-Q1

Hello,

we're looking for an IC that can control a high side back to back N-MOSFETs power supply switch.

There are up to 5 independently controlled switches in the considered application. IC with an integrated charge pump is preferred, but less integrated solutions are acceptable as well (for example circuits that relay on an external charge pump).

Important aspects:

  1. Cost, including required external components.
  2. Switch has to withstand at least 32V for 300ms.
  3. Reverse polarity protection.
  4. GS voltage in on state around 10V.
  5. Failure modes – does a damaged component (for example MOSFET) in one channel affects operation of other channels?
  6. Possibility to disable/configure overload protection on the switch side if such feature is present in the IC.
  7. EMC robustness.
  8. Current consumption in the disabled state.

LM5060-Q1 looks promising, but requires external components for functions that are not needed in our application (UVLO, OVP, VDS Fault Detection). An IC with access to the internal charge pump would be better, so the charge pump voltage can be reused in the circuit to drive other switches (provided the charge pump stays active if the switch is disabled). Load discharge by the OUT pin in the off state is not desirable in some of the intended applications.

LM74700-Q1 does not seem to provide switch-off functionality by the EN pin. It looks like back-to-back MOSFET arrangement is not possible – the ANODE pin provides both reference for GATE voltage and supply for the charge pump.

Can you recommend any better alternatives?

About the high side drivers without integrated charge pump: can TI offer an IC that can act as a switch between a charge pump and a MOSFET gate in a high side back-to-back arrangement (level shifter)?

Thanks for your help.
TI Customer

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ADS1120: Thermocouple measurement offset calibration

November 19, 2018, 7:29 am
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Part Number:ADS1120

Hello guys,

So I am using ADS1120 to measure the thermocouple temperature. As I was referring to the manual I came across the section 9.2.1.3 Application curves which speaks about a system offset calibration performed to translate Vtc to 0V. Can anyone explain what kind of offset calibration was it? As I am trying to measure the K type thermocouple temperature, I get some absurd values after I perform the cold junction compensation as mentioned in the manual.

My ambient temp is 22.5 deg C and for testing purposes I am measuring an object with 30 deg C temperature (this is the hot junction).

Can anybody help me with this?

Thanks,

Regards,

Kartik

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