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TPS54620: What is the output inductance current waveform of TPS54620 overcurrent protection? We measured that overcurrent protection did not work.
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TPS92513HV: Short pulse high voltage
Part Number:TPS92513HV
Hi,
For a new design I want to create a strobe light with IR LEDs (Osram SFH 4249 - UV). These LEDs will be preferably connected with 15 in serie, what would result in a Vf of 35-45 V.
I would like to use the Iadj pin to reduce the current and use the PDIM pin to start the flash. These flashes will be a maximum of 0.3 ms and a minimum of 0.1 ms, with a switching frequency of 1 - 100 Hz.
My question since this will be powered by a capacitor bank and a small power supply I wonder if the headroom is not to small because I want to power it with a 48 V power supply.
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BQ24261M: BQ24261M NRND or not?
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DLPNIRSCANEVM: How to get intensity and reflectance data from device
Part Number:DLPNIRSCANEVM
Hi,
Is there any way to get the reflectance and intensity data from this device. It only gives absorbance data.
Regards,
Jyoti
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TPS793: TPS793
Part Number:TPS793
Hi
I'm trying to use this regulator to drive the DVDD of a WM8741 DAC to 3.3V.
IN and EN pins are at 5V (from a computer USB), OUT pin has one a ferrite bead in series and one 47uF electrolytic to GND,
NR pin has one 0.01uF ceramic cap to GND.
At first start, everything is fine, output voltage is 3.3V, current 60mA.
After a short time, 20 seconds, voltage drops to 2.5V, device start to smoke, temperature is about 35°C,
current still 50-60mA and, of course the output of the DAC has a lot of distortion.
I have to shut down the power before the regulator dies.
I can't find out what is wrong.
Any help would be welcomed.
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TPS61040EVM-002: Output current setup queries
Part Number:TPS61040EVM-002
Hello
I am planning to use TPS61040 in my design. There are a few doubts.
Need to drive 4 IR LEDs in series(VSMY1850X01) with forward current of 100mA.
The system is powered by a Li-ion Cell.
These LEDs have a forward voltage of 1.65V.
How to calculate resistors R1, R2, R3 and R4?
I need PWM to control the intensity also. The minimum average current of 50mA and Max Average current of 100mA. Do these minimum and maximum values affect Resistor Values?
What is the purpose of D6? is it some kind of protection? Can this be omitted from BOM?
This is the Link to LED datasheet: www.vishay.com/.../vsmy1850.pdf
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TMDX654IDKEVM: Basis board identical to TMDX654GPEVM?
Part Number:TMDX654IDKEVM
I just downloaded the design file of the TMDX654GPEVM and TMDX654IDKEVM. It seems that they use the same cpu board (sprr358.zip, sprr360.zip, sprr361.zip, sprr363.zip). Is it correct?
Thanks a lot for the clarification,
Bernd Sprenger
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IWR1642BOOST: Data Structure
Part Number:IWR1642BOOST
Greetings,
Upon working with the AWR1642 radar and trying to develop an algorithm with the information given in the documentation many difficulties have risen. In the following lines I’ll expose questions that would be of great help if answered:
1) How are the data structures effectively organized?
This question comes because after analyzing the document “mmw Demo Data Structure v0.1” we’ve seen the data structures defined for the first version of the SDK. Afterwards, we verified that although the structures are similar for the version 2_00_1 there are differences in the sizes of the structures and even in the structures utilized. As an example, we can see that in the index.html present on the SDK path for the version 2_00_1, that specifies the data structures used, there is a field called SubFrameNumber that wasn’t in the first version. What we would like to know is how the data is exactly structured for the newer versions to make it possible to develop algorithms based on these positions.
Being more objective, we would like to know the exact positions and length of the parameters given by the incoming frames.
2) How can we get meaning of the values taken from the fields?
This doubt appeared because, even if we acquire the data on each field and we know what the field is about, we don’t know the true meaning of the value we get. What I mean by this is, for example, when getting the x coordinate of a detected object, to which referential is the coordinate we are receiving related to?
3) Is the Matlab code for the demo visualizer available?
When developing the algorithm for our purposes, the configurations we are sending to the board are specified in the demo visualizer app and, as so, it would be very helpful if we could analyze the code to assert how the fields are organized and the information is processed
As a disclaimer, we students developing a project for educational projects. This question was important because the lack of documentation as proven to be a real difficulty for the development of our project.
Thank you!
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DP83TC811S-Q1: power over data line
Part Number:DP83TC811S-Q1
Hi TI,
we are using DP83TC811S-Q1, and want to know, if power over data line (PoDL) is possible with this PHY, using the single twisted pair to send the data but also send the power to the receiver.
Regards,
Zhouyang Liu
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Linux/PROCESSOR-SDK-AM335X: Need to render image using Imlib2 package
Part Number:PROCESSOR-SDK-AM335X
Tool/software: Linux
Hi,
Our application needs to load image using Imlib2 library for file formats such as .bmp, .jpeg, etc.,
We looking for a Imlib2 and its dependency packages for AM335XEVM.
Could you please share details or required to be run on AM335xEVM?
Thanks and Regards,
Jagdish
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RTOS/AWR1642BOOST: Reason for not using CFAR-OS for range?
Part Number:AWR1642BOOST
Tool/software: TI-RTOS
After reading through the mmWave demo doxygen, I found the following statement: "So detection along Doppler dimension first might be computationally cheaper: the first selection algorithm is less complex, and the subsequent more sophisticated algorithm runs only on the points detected by the first algorithm. So in this implementation, we run Doppler CFAR first and then run range CFAR on the detected Doppler indices. However, we currently use the same type of algorithm (CFAR-CA) for the range direction as the Doppler direction. The range CFAR algorithm could be replaced by a more sophisticated algorithm like CFAR-OS to get the benefit of this way of processing."
I found a C source file for the CFAR-OS algorithm in the /alg folder of mmWave SDK1.2. Is there a reason why there is not an option to implement CFAR-OS in the CLI via cfarCfg?
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CCS/TMS320F28069: Flash library for TMS320F28069: Flash_Erase() does not return
Part Number:TMS320F28069
Tool/software: Code Composer Studio
Hello again ,
for my project, I'm using the (compiled) flash library
- with the header " Flash2806x_API_Library.h",
- and lib file: Flash2806x_API_wFPU_Library.lib
The lib is used with the SW APi, which was copied to RAM.
As long as writing, everything works fine -- i.e. writing sucessively to erased flash memory.
Problems occur when Flash_Erase() is called: The function does not return, moreover,
I found that the target went through a reset (watchdog is definitely OFF).
Has anybody an idea what could be wrong? Since the lib is precompiled, I cannot examine anything...
Best regards,
Goetz
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IWR1642: Reduce pins for 60P Interface on the xWR1642 Device
Part Number:IWR1642
I want to use the DCA1000 board for raw data collect. But the 60P Interface is too large for my final product. I only want to get the ADC raw data from the xWR1642 device, so I decided to reduce pins.
As the picture show below
I think the necessary pins are
LVDS CLK/FRAME CLK
LVDS 4lane or 2lane(for xWR1642 only) data input interface
SPI Interface
RS232 TX/RX Interface
The unnecessary pins are
DMM_MUX_CTL
DMM_CLK/SYNC
TRACE_DATA 0~15
Not sure:
I2C Interface
HOST_INT
MCU_RST
PGOOD
Is this the correct classify or not? Can I reduce the not sure pins?
Thanks for your reply.
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SN65DSI85: Errata
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CC1310: CLOSE_IN_RX Feature similar to the CC1101 Feature
Part Number:CC1310
Hi,
We have migrated our design from the CC1101 to the CC1310. One of the features we previously used was to be able to attenuate the RX signal when 2 of our products were in close proximity to each other. In order to achieve this we would use the 0x03: FIFOTHR – RX FIFO and TX FIFO Thresholds register (page 72 in the CC1101 datasheet) and setting bits 4 and 5 we could attenuate the signal from 0dB to 18dB.
Is there a similar feature in the CC1310? If not why was it removed?
Thanks,
Brad.
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SN65DSI85: equalization
Part Number:SN65DSI85
When should we be using equalization on the DSI lines? Currently we have our settings for 2dB eq.
Thank you
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MSP430F5437: difference between TA1 and TB0 when running in UP mode
Part Number:MSP430F5437
Hello TI Forum,
I've noticed a difference between TA1 and TB0 when running in UP mode, and TOGGLE ouput pin mode.
Both timers use identical configurations (exactly as shown below), but the output pin frequencies I get from these two timers are not identical.
TA1CCR0 = 9;
TA1CCTL1 = 0x0080; //TA1.1 in compare mode and TOGGLE output pin mode
TA1CCR1 = 5;
TA1EX0 = 0x0000; //TMRA1 input divider expansion set to 1
TA1CTL = 0x0114;
TB0CCR0 = 9;
TB0CCTL5 = 0x0080; //TB0.5 in compare mode and TOGGLE output pin mode
TB0CCR5 = 5;
TB0EX0 = 0x0000; //TMRB0 input divider expansion set to divide by 1
TB0CTL = 0x0114;
Both timers are clocked from ACLK, which is in my case 14.7456MHz.
TA1.1 output pin frequency (measured) is in line with the equation Fout = ACLK / ((TA1CCR0 + 1) * 2) = 737.28KHz
However, TB0.5 output pin frequency (measured) is higher and equals 819.2KHz, which is in line with Fout = ACLK / (TB0CCR0 * 2) = 819.2KHz
If I configure TB0CCR0 = 10, then both timers generate identical frequencies (737.28KHz) on respective output pins.
Can you please explain this behavior?
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TRF7970A: TRF7970s
Part Number:TRF7970A
Hi,
I have ported TI sample code to a Microchip environment. I had very little changes so I can keep the code intact. I have a problem with IRQ in the "ISO14443A_sendPollCmd(unsigned char Command)" function. After setting up the buffer with it is despatched with TRF79xxA_writeRaw(&TrfBuffer[0], Offset) after which an IRQ is generated.
2 strange things accur: First control is diverted to the IRQ ISR and the IrqStatus register is read to determine the reason for the interrupt. 0x00 is always returned and second when reading the register the IRQ remains high.
I wrote a function that reads all registers and displays them. Before the above TRF79xxA_writeRaw(&TrfBuffer[0], Offset) function registers appear to have correct values loaded. After the function all registers read 0x00.
The IRQ ISR reads the IrqStatus register continously but has no affect clearing the IRQ pin or finding meaningfull data. On startup the IRQ pin is reset but once the above function is processed, remains high so not can be detected. I am using a TRF7970a device
Any ideas the cause?
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TPD1E05U06-Q1: Polarity Marking in Datasheet is completely wrong
Part Number:TPD1E05U06-Q1
Hello,
It looks like polarity marking for TPD1E05U06-Q1 is wrong.
Pin 2 should be marked as cathode.
can you please confirm this as soon as possible ?
Thanks and Regards
Vijay
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RTOS/CC1310: UART close increases power consumption
Part Number:CC1310
Tool/software: TI-RTOS
Hello
I have faced similar issue as it was described here (e2e.ti.com/.../2651082). When using UART in callback mode and than closing it - power consumption is increased by around 1mA. Hack with opening and closing UART in blocking mode immediately decreases power consumption to normal level. Any ideas of better way to handle this state? Do you have a plan to fix this issue?
Currently using simplelink_cc13x0_sdk_2_10_00_36 and compiler ti-cgt-arm_18.1.1.LTS. From the latest changelog of version 2.40 of the SDK I see that there was some improvement of UART_close() (ID TIDRIVERS-1407). Can it help to resolve the problem?
Best regards,
Maksym
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