Part Number:LM5145
Hi, the thermal pad under the LM5145 has a recommendation of additional vias for heat dissipation.
Also in the datasheet it is recommended that vias under paste be filled, plugged or tented.
As this is specifically for heat dissipation, would it be best to finish these vias with conductive filler?
Kind regards
Part Number:ADS1299
Hi,
I am currently using the ADS 1299 Evaluation Board. I am willing to make a prototype using the 1299, the evaluation board has a limitation of not giving out data in real time. It takes [(number of samples required per channel)/(data rate)] seconds to show the waveform. Why is it not possible to obtain the data in real time? Is this the limitation in the DSP provided in the motherboard or some other reason? Please help me out in this. Also suggest me a processor that works on operating system like Linux, which can be used to develop my prototype having real time processing.
Thanks
Part Number:TMS320F280049
Hi,
The F280049 datasheet only shows the minimum/maximum values over the whole operating range and the typical values at 30oC.
Is there a number for 60-70oC?
Part Number:TMS320F28035
Champs,
Our customer requests us to calculate the tolerance of PWM duty.
I following this criteria to determine the tolerance, please help to check it.
http://processors.wiki.ti.com/index.php/PLL_Jitter_on_C28x_Devices
Using formula 1
This means:
1. Input clock jitter => 20 MHz, 30ppm => 1.5 ps
2. [pll_output_clock_period * 0.05 * sqrt(2)] = (1/120 MHz) * .05 * sqrt(2) = 589.25 ps
3. PLL Jitter = MAX (1.5 ps, 589.25 ps) = 589.25 ps
PWM resolution: 16.67ns, PWM worst tolerance: 589.25ps / 16.67ns * 100 = 3.53%
Is our estimation correct?
Wayne
Part Number:SN65HVD234
Hi,
I have designed a product using CAN Transceiver SN65HVD234QDRQ1, So please review the attached design to avoid any design related issues.
Part Number:BQ25703A
Dear TIer
I had ask about BQ25703A charge done function and had reply me there are no current termination function.
But my customer test that when BQ25703A when bat voltage near charge voltage, it seem our charge would be auto turn off charge current.
So they want to make sure would BQ25703A auto turn off charge current by battery voltage or by what behaver?
Thank you so much!
BR
Bruce
Part Number:TMS320DM642
Tool/software: Code Composer Studio
Hello all,
I am working on DM642 Evaluation Module Version 3 with CCS version 3.3. I have imported some programs which is present with CCS version 3.1 to CCS version 3.3.But I got an error "
[main.c] "C:\CCStudio_v3.3\C6000\cgtools\bin\cl6x" -g -q -o2 -fr"C:/CCStudio_v3.1/boards/evmdm642/examples/audio/echo/build" -i"C:/CCStudio_v3.3/boards/evmdm642/drivers/include" -i"C:/CCStudio_v3.3/boards/evmdm642/include" -i"C:/CCStudio_v3.3/boards/evmdm642/csl/include" -d"_DEBUG" -d"CHIP_DM642" -mv6400 -@"../build.lkf" "main.c"
"main.c", line 36: fatal error: could not open source file "evmdm642.h" "
I have attached the pic below.
I have attached the program folder from where I have imported.
(Please visit the site to view this file)
Part Number:DS80PCI402
Hi,
Q1. Do the capacitor have to be placed on both OUTA_xx, OUTB_xx and INA_xx and INB_xx lines? Which is the preferred position for these capacitors to be placed?
Is it near to the INA/B_xx pins and away from OUTA/B_xx pins?
Q2. As of now, my understanding is that OUTA/B_xx pins are output pins and INA/B_xx are input pin types. But the direction of these pins is wrongly mentioned on Page 4. Why?
Q3. The RATE pin is in RESERVED when it tied to VDD through 1K? What is mean by the term RESERVED in this context? Whether Gen 2 de-emphasis is possible in this mode?
Q4. What does 'R' denote in Table:5 of page 16 with respect to the signal SD_TH?
Thanks and Regards
DEEPAK V
Part Number:UCC27424-Q1
Hi support team,
My customer wishes to know what is the min value for the rise time and fall time of UCC27424-Q1. The datasheet only specify the typical and maximum value, could you please check on this?
Thank you.
Best Regards,
Wei-Hao
Tool/software:TI-RTOS
Do I need a MCU control the DRV91690
Part Number:CC1310
Tool/software:TI-RTOS
I have a question about the cc1310.
I saw the thread below.
In my project, a particular mcu will send data to the cc1310 via uart. (The examples used in the project as base are rfWsnNode / rfWsnConcentrator.)
I know that the default power policy of the cc1310 is in standby mode.
That's why I think the cc1310 will enter standby mode during the time that data is not passed to the uart.
However, I know that in standby mode it does not wake up when it receives data through uart. (I referenced the thread above.)
How do I set the cc1310 to wake up with a uart interrupt? (ex ) power mode setting or uart driver setting)
Thank you.
Part Number:TMS320C6416
Tool/software: Code Composer Studio
Hello，
I'm currently using TMS320C6416, there's dspbios 5.31 used in my project, the debug IDE is CCS 3.3 .
Background:
My program uses several GPIO ports to blinki the LED or work as interrupt indication, besides, EMIF and all 3 groups of MCBSP are used. I configure two tasks in my bios TCF file, one for LED blinking, the other for serial port debugging.
problem description：
1. My program works all correctly when online running using JTAG emulator, if I disconnect it halfway, I can re-connect it successfully later. However once I burned the program into flash, after power up,
by observing the led and serial port outputs, 6416 can still work normally, while the JTAG could never be connected any more. Unless I erase the flash, then I'm able to connect the board.
2. I have cancelled all the tasks, HWIs in BIOS tcf file, then I burn it into flash and try again, the same result, also failed to connect the chip;
3. When failed to connect the board, we measure the waveform of JTAG related signals, including TCK/TDI/TDO/TMS...and compared to the normal condition, there's no difference.
4. I make another bare-board version of the project, with the same function, BIOS not used. This time I can successfully connect to the JTAG after power up.
I'd like to know why I failed to connect JTAG when using software with BIOS? The TDI/TDO signals seem not pulled up or down. Does the BIOS do some other thing and leads to this problem?
Hope to get your timely help, thanks!
Best Regards,
Anqi
Part Number:ADS54J60
Hello,
The ADS54J60 has two DDC blocks, each can operate in four possible modes - bypass, decimation x2, decimation x4, decimation x4 IQ.
I would like to know if the DDC blocks operation is independent?
For example, is it possible that channel A be in bypass mode, whereas channel-B is be in decimation x4 IQ?
Thanks,
Hi,
We found an unexpected behavior of STATUS pin after the system enter S4/S5 mode as summarized below. Please provide your comments. Thanks!
Waveform1: CH1/2/3/4=CTL1/CTL2/ILIM_SEL/STATUS
Waveform2: CH1/2/3/4=CTL1/CTL2/ILIM_SEL/CTL3
Part Number:TIDM-HV-1PH-DCAC
Tool/software: Code Composer Studio
hello i have some trouble with"TIEVM-HV-1PH-DCAC"
1) There was a problem during the "3.1.2.3.4.3 running the code" session of the "User Guide(TIEVM-HV-1PH-DCAC, grid connected)
2) <Capture#1> is the screen of the Build2_DEMO after clicking "run the project".
<capture#1>
3) <Capture#2> is after the voltage of AC supply is set to 110V / 60Hz.
<capture#2>
4) After that, I slowly raised the voltage of the DC supply. However, when the DC voltage reaches 190, the click of the relay is heard and it is shown as <Capture#3>.
<capture#3>
5) At the same time, the AC supply is put into the fault state by the protection program.
what is wrong with this?
PS,
when i run the project and continuous refresh it, Scriptconsol show me boardstatus_Overcurrenttrip
i knew when i progress the project it change to boardstates_NoFault
but is it OK?
Part Number:UCC28950
I have a question is about UCC28950 soft start function , The enable pin which from Pull up threshold (3.6V) to SS clamp voltage(4.65V), the UCC28950 will fast pull up the output voltage to design value 325Vdc , and the input current will clamp with cycle by cycle limit .The enable function show as Fig-1. I think the two questions as below:
Vi = 90~264Vac transfer to 387V which use UCC28070 to be the PFC solution
Input current ≒7A
Input power = 2.7KW
Vo = 325Vdc
Current limit design point ≒15A
UCC28950 work in voltage control mode
My question as below:
The current limit protect shouldn’t occur in normal operation condition including start up status .Did you have some method to avoid UCC28950 fast pull up function?
I think smooth start up is better than fast start.
I have try some adjustment to avoid the current limit occur:
The Fig-3 shows the input inrush current will make the input voltage down to input UVP protection occur, and it’s happen in output start up.
Fig-1
Fig-2
Fig-3
CH1:Output voltage
CH3:BUS voltage
CH4:Input current(AC side)
Part Number:TMS570LS0332
Hi,
We are using TMS570LS0332 in our design. We are triggering the sampling of the ADC based on RTI compare 0. The RTI compare 0 is configured to 50 uSec and RTI compare 0 interrupts are enabled. In this case, the ADC samples without any issue. Having an interrupt once every 50 uSec, is waste of CPU. I have disabled the interrupt. The I realized that ADC which depends on RTI compare 0 is disabled. Is it expected?? (Note:: The RTI counter is configured to 50 uSec and it is started as before. Only interrupt is disabled.)
Is it possible to trigger the sampling of ADC without enabling the RTI compare 0 interrupt?
Many thanks in advance.
Best regards,
Sreekanth challa
Part Number:UCC5390
Hi TI Community,
I've been working on design of a 3-Phase Inverter using SiC MOSFET with UCC5390 chosen for driver. Short circuit clamping is one of the key features of the IC. I wanted to confirm whether this feature is same as Desaturation protection?. If not , can anyone please clarify how Short Circuit Clamping and Desat Protection feature differ from each other. And also how is this Short Circuit Clamping is configured within the IC.
Thanks in Advance
Meghana R
Part Number:XTR117
Hi ,
Can you please assigned me to the relevant technical person , my customer has a problem please see below,(Please visit the site to view this file)
PN: XTR117
Please see attached drawing.
This planing it is according to XTR117 datasheet page 6.
The analog Input is 1-5vdc.
1. When I connect power 24vdc to the IC from Power IN1 or 2. (electrical drawing Page 2)
I measure 35ma or 24ma current and the XTR not functioning.
2. Even when I disable bridge diode the XTR117 does not functioning.
3. When I connected Scope ground on the resistor (DC power -) side (see datasheet page 6), It start to work.
Please help me with this circuit.
Thanks
