WEBENCH® Tools/LM22678: we need help for Switcher output side noise remove

June 18, 2019, 4:58 am

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Part Number:LM22678

Tool/software: WEBENCH® Design Tools

Hello All
We have design Switcher using LM22678J-5 V For 5 A
we need help for Switcher output side noise remove
Please Consider below Component detail which is used
1) Switcher IC Part Number :- LM22678TJE-5.0/NOPB
2) 1st Input Capacitor Part Number :- A767KN336M1JLAE042
3) 2nd Input Capacitor Part Number :- CC0805JKX7R9BB105
4) Booting Capacitor Part Number :- CC0805JKX7R9BB105
5) TVS Diode Part Number :- STPS30SM60SG-TR
6) Inductor Part Number :- 744325650
7) 1st Output Capacitor Part Number :- 16SVPF180M
8) 2nd Output Capacitor Part Number :- C0805C104J1RACTU

Please find below a screenshot of Schematic

Also, I have attached Layout Image 

Image 1 TOP Side

Image 2  Power Side

Image 3 GND Layer

Image 4 Bottom Side

we have issue Face in Output Side Noise present 

kindly find I have attached the image of DSO 

signal measure at Input Capacitor 

 

signal measure at Output Capacitor 

Please suggest how to remove noise at the output side 
Thank you in advance

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Linux/TMDSICE3359: TMDSICE3359

June 18, 2019, 5:00 am

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Part Number:TMDSICE3359

Tool/software: Linux

sdk 5.01

Linux RT arago.

AM3359 Industrial Communications Engine (ICE)

The question is from: https://e2e.ti.com/support/processors/f/791/p/808657/3005336#3005336

In http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Overview_Building_the_SDK.html

In 1.2.2.2. Build Steps:
the command:
./oe-layertool-setup.sh -f configs/processor-sdk/processor-sdk-05.01.00.11-config.txt

create the directory:
tisdk/sources/meta-processor-sdk

the shows an errors:

error: inflate: data stream error (incorrect header check)
error: File ad1d9c52ff7210ca2df9b57f2183ea9c7934685e (arago-project.org/.../1d9c52ff7210ca2df9b57f2183ea9c7934685e) corrupt
error: Unable to find ad1d9c52ff7210ca2df9b57f2183ea9c7934685e under arago-project.org/.../meta-processor-sdk.git
Cannot obtain needed tree ad1d9c52ff7210ca2df9b57f2183ea9c7934685e
while processing commit e9c4216f6407e86bd04ad7b544dbebde346e6135.
error: fetch failed.
ERROR: Could not clone repository at arago-project.org/.../meta-processor-sdk.git

and delete the directory tisdk/sources/meta-processor-sdk.

I. e., error on the lost of file in http://arago-project.org/git.

TPS63001: TPS63001 switching frequency

June 18, 2019, 5:02 am

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Part Number:TPS63001

Dear Sir or Madame,

I'm designing a PS using TPS63001 and currently calculating the Ipeak of the inductor according to the datasheet (DS) - TPS63001 rev. C (slvs4520c), section 8.2.2.2 Inductor selection.

On page 12 you provide the necessary formulas as well as 'f = Converter switching frequency (typical 2.5 MHz)'. However the oscillator range for this part is 1250 - 1500 kHz (6.5 Electrical Characteristics, page5), which I would consider being the switching frequency (during fixed frequency operation). [Note that if you take a look at TPS63031, the same 'typical  2.5 MHz' is stated in section 9.2.2.2 Inductor selection, but this part actually has the oscillator frequency range of 2200 - 2600 MHz.]

Therefore I would like to ask what is the switching frequency of TPS63001? Is there a mistake in the DS or is my understanding incorrect?

Thank you

OPT101: Designing for pulse oximeters

June 18, 2019, 5:10 am

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Part Number:OPT101

How to design OPT101P for pulse oximeters where the range of frequencies of the signal is 0.5Hz to 20Hz? Also:

1. How to describe transimpedance gain (in ohms) in decibels?

2. What is the meaning of open loop gain=90db? Is this the intrinsic quality of am opamp?

3. For stability, should the zero come before the pole or after it? In OPT101P, doesn't the zero come after the pole?

4. How is the bandwidth =14kHz calculated from the bode plot?

5. Is f=14kHz the zero frequency of OPT101P?

Assembly coding for c55x processor

June 18, 2019, 5:15 am

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Hi,

 I am a beginner in ASM coding for processor C55x. I have some doubts regarding the following lines of code.

   SFTS AC0,#1 ;

|| MOV #4, BRC1 ;  inner loop counter set to number of iterations-1 

as a beginner I have some questions :

What is the importance of ‘ ||‘ here?

Is it refers to parallel operation or anything else?

is there any difference without ' ||'?

Linux/TDA2PXEVM: A-15 compiler:Other GCC ARM tool support

June 18, 2019, 5:17 am

≫ Next: UCC27519: No output when Vdd is 5.5V and In+ is 3V square wave

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Part Number:TDA2PXEVM

Tool/software: Linux

Hi,

I am working on A-15 core. So, out of curiosity want to know about GCC ARM tools.

1) Is there any other GCC ARM tools (compiler & linker )for A-15 which is been supported on TDA boards except the mentioned one i.e (https://launchpad.net/gcc-arm-embedded/+milestone/4.9-2015-q3-update)?

2) If not, then what's the reason?

Regards 

Surbhi

UCC27519: No output when Vdd is 5.5V and In+ is 3V square wave

June 18, 2019, 5:18 am

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Part Number:UCC27519

Hi 

Can you help, we are using UCC27519, when VDD = 5V and IN+ is 3V square wave the device work correctly. 

However when increase the VDD to 5.5V, In+ the same is 3V, there is no output, does this match the spec? thanks!

CCS/TMS320F28377S: ASM function

June 18, 2019, 5:18 am

≫ Next: CCS/OMAPL138B-EP: PROCESSOR-SDK-OMAPL138: CSL PINMUX registers messed up

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Part Number:TMS320F28377S

Tool/software: Code Composer Studio

How to write C callable functions in assembly language? Which register does the compiler use to pass the first integer parameter to ASM function? And pass the second integer parameter and the third integer parameter? Where can I download this assembly language function routine? My CCS version is 6.1.0.00104. The device I use is TMS320F28377S.

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CCS/OMAPL138B-EP: PROCESSOR-SDK-OMAPL138: CSL PINMUX registers messed up

June 18, 2019, 5:20 am

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Part Number:OMAPL138B-EP

Tool/software: Code Composer Studio

Hi

I am currently trying to migrate my project from MCSDK to Processor_SDK_RTOS_OMAPL138_5_03_00_07 using the PDK_OMAPL138_1_0_8.

As it turned out, all the PINMUX tokens in ti/csl/src/ip/syscfg/V0/cslr_syscfg.h seem to be completely messed up. This means the tokens do not match the values in the datasheet.

e.g. the datasheet says PINMUX14 bit 3 - 0  configures GP6[7]

but the header file says:

#define CSL_SYSCFG_PINMUX14_PINMUX14_3_0_GPIO0_2 (0x00000008u)

I checked a few other tokens which are wrong as well. I think this maybe is a PINMUX table for a DIFFERENT chip, but not the OMAP-L138.

Please check!

Increasing refresh rate at the expense of spatial resolution

June 18, 2019, 5:21 am

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I saw on your website that you have fast solutions, like DLP7000, which can reach a rate up to 32kHz, which refers to the overall refresh rate of the DLP.

In my application, a high spatial resolution along both x and y axis is not mandatory, but it is enough to have a high number of pixels only along one direction.

I saw from the datasheet of DLP7000 that many DMD operations are possible: single block, dual block, ...

I was wondering if it is possibile tu use only a bank of the dmd (letting all the others off) to increase the frame rate at the expense of a lower effective number of rows. Is it possibile in this case to reach 32*16kHz rate with a single bank active?

If not, is there any other possibility to increase the frame rate at the expense of spatial resolution?

Finally, is it possible to increase speed using only a portion of the DMD also with others chips of the DLP family, like DLP5500 or DLP4500?

Thank you for your time

Best regards,

Alessandro Cominelli

ADS6445: TSW1200 with ADS6445EVM verilog source code

June 18, 2019, 5:23 am

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Part Number:ADS6445

Hi ,

I am designing a system which is based on the design of TSW1200 with ADS6445EVM. I need a reference. Would you provide me the  verilog  source code for my reference?

My email: lianbing.shi@sofer.cn

Sincerely,

LB Shi

LM5022: Multi phase design for LM5022 controller

June 18, 2019, 5:24 am

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Part Number:LM5022

Hello, do you have any suggestions on how to make a multi-phase, interleaved boost controller using this device?

I am looking into a way to share equally the currents between the legs

TPA2005D1: Compatibility with Different Impedance Speakers.

June 18, 2019, 5:24 am

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Part Number:TPA2005D1

Hi Sir,

We are using TPA2005D1 Class-D amplifier in my Project.

My project is working on 3.3V.

In the datasheet of TPA2005D1, mentioned that class-D amplifier can drive 8 ohms and 4-ohm speaker for the range above 2.5 V.

Is there any performance degradation, if I use a speaker other than 4-ohm and 8-ohm impedance? 

Regards,

Amey

Linux: Arm Inline Assembly code On Linux Platform

June 18, 2019, 5:30 am

≫ Next: CCS/TMS320F28027F: UNDERSTANDING HVBLDC CODE

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Tool/software: Linux

I want to write the equivalent inline assembly code for the below C code

It should support  ARMv7-a and GNU v5.3.1 (LInaro)

if (low >=  0x01)
    {
      low -= 0x01;
      propagate_carry(ptr);
    }

Here ptr is any pointer.

Can someone help me out with this?

I tried like this :

__asm
    (
        "SUB    %[input_low],    #0x01 \n"
        "MOV  eax,  %[Input1] \n"
        "PUSH eax  \n"
        "CALL propagate_carry  \n"
        "POP ebx \n"
        : [Input1] "=m" (ptr), [input_low] "=r" (low)
    );

While building on CCS 6.2 it is throwing errors :

/tmp/ccDdqZ7X.s: Assembler messages:
/tmp/ccDdqZ7X.s:1565: Error: ARM register expected -- `mov eax,[fp,#-16]'
/tmp/ccDdqZ7X.s:1566: Error: expression too complex -- `push eax'
/tmp/ccDdqZ7X.s:1567: Error: bad instruction `call propagate_carry'
/tmp/ccDdqZ7X.s:1568: Error: expression too complex -- `pop ebx'

CCS/TMS320F28027F: UNDERSTANDING HVBLDC CODE

June 18, 2019, 5:30 am

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Part Number:TMS320F28027F

Tool/software: Code Composer Studio

HELLO EVERYONE,

I WAS GOING THROGH THIS HVBLDC SENSORED CODE IN Control Suite,there are many stuff which are not clearly written or have made too complex can anybody please help to understand the following doubts:-

1.How is this #define HALL3_CREATE_MAP(v) working?

2.What is this "Alpha state" "A branch state" "B branch state" "C branch state".

Thanks is advance. 

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Compiler/CC2640R2F: Effective memory usage in OAD_unsecure on-chip

June 18, 2019, 5:32 am

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Part Number:CC2640R2F

Tool/software: TI C/C++ Compiler

BIM section size is 8kb, while BIM size is only 2.6kb, hence I can use at least 1 page for user app. What is the proper way to do it?

LAUNCHXL-CC1310: High Power with 1.8V supply

June 18, 2019, 5:36 am

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Part Number:LAUNCHXL-CC1310

Hi there,

I would like to now if it is possible to set CCFG_FORCE_VDDR_HH=1 (TX on 14dbm) and maintain 1.8V power supply. I am trying to achive a high tx power with a 1.8V power supply. Untill now I have not been able to achieve this, my board turns off around 2.1V when I try to TX on 14dBm.

Regards

Linux/AM5708: H.264 Encoding for USB Camera in AM57xx Board

June 18, 2019, 5:37 am

≫ Next: TMS320DM642: TMS320DM642AGDK6 and TMS320DM642AGDKA6

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Part Number:AM5708

Tool/software: Linux

Dear All,

We have one Development kit in which we are using AM5708& AM5728 Soc. We are using "processor-SDK-02.00.01.07" SDK with Yocto Build System.

We need to use H.264 Compression on /dev/video1 (USB Webcam) Video. We download the source code from below link but we need support For Compiling and Testing on Board.

https://git.ti.com/ivimm/ipumm/trees/master/extrel/ti/ivahd_codecs/packages/ti/sdo/codecs

Please provide us the support for both compiling and testing quickly.

Thanks & Best Regards,

Nikunj Patel

TMS320DM642: TMS320DM642AGDK6 and TMS320DM642AGDKA6

June 18, 2019, 5:41 am

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Part Number:TMS320DM642

The difference between TMS320DM642AGDK6 and TMS320DM642AGDKA6?

thank you very much!

DS25MB200: DS25MB200 in series with 1000base-x mac opto module, whether it will influence the sync clock recover

June 18, 2019, 5:43 am

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Part Number:DS25MB200

Hi team,

My customer wants to DS25MB200 in series with 1000base-x mac opto module, whether it will influence the sync clock recover? Thanks.