Questions tagged [texas-instruments]
A manufacturer of semiconductors, both discrete and integrated circuits.
221
questions
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45 views
How to import the CAD file, generated by TI Webench, into KiCad software?
I noticed that the TI Webench online designer tool generates a CAD file of the designed circuit, and I am a KiCad user (recently started using it). So, I am not sure if there is anyway to import the ...
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0answers
38 views
Trying to write to FRAM with MSP430
I am pretty new to embedded work, so I am just trying to pick things up on a small scale. So, for the reason, I have an accelerometer connected to my MSP430FR6989 Launchpad. At the minute, all I want ...
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37 views
bode plot of LM3481 as boost converter
I have simulated an open loop boost converter using LM3481 average model, given by texas instruments and I got a very strange bode plot (More precisely, strage phase response), please can you tell me ...
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1answer
34 views
AC Simulation in Power supply simulators
I would like to design a boost converter using LM3481 from texas instruments. To de the job, I have selected TINA TI circuit simulator, where the average model of LM3481 is given. So I have used this ...
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1answer
39 views
Ramp compensation for UC1843 and UCC38C44
When we pick up the datasheets of UC1843B-SP and UCC38C44, we notice that they have the same functional block diagram, specially the PWM generator circuit (Error amplifier, current sensing PIN and the ...
2
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2answers
72 views
TMS320F280049C: Unwanted pulse on GPIO during power on/off
I'm using the TI TMS320F280049C microcontroller.
While testing its GPIO behavior during power on/off, I found a high to low transition on GPIO pin, on every power on/off.
I'm checking the waveform ...
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1answer
47 views
switch-mode power supply
First post here.
I'm making a DC/DC converter which will generate an output of 19.5V 18A.
Its a synchronous buck converter with the LM5145 TI chip.
When I have light load on the converter the output ...
0
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2answers
82 views
Mecrisp-Stellaris Forth on TI Tiva C LaunchPad
I'm currently trying to load mecrisp forth on a spare tiva c series launchpad (TM4C123) board I have at home and am not having much success. I'm an electrical engineering student and while I've ...
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34 views
Filtering analog audio signal using TLV320AIC3111-EVM
I'm working on a project to filter analog microphone data using the audio codec from TI, the TLV320AIC3111. We are using the EVM However, I'm facing problems with implementing the filters on the ...
0
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1answer
81 views
I2C setting MCU as both slave and master at the same time
Hello everyone I'm working on a new project with the TI MSP432P401R microcontroller. I want to have 2 separate I2C buses. I2C bus 1 will set the MCU as the master, whereas the DAC and the pressure ...
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0answers
60 views
Applying a 1/3 bias to an LCD display spec'd at 1/2 still safe?
We're currently using an MSP430 with an integrated LCD controller that only has a 1/3 bias mode. The LCD display has a 2-mux configuration and the data sheet specifies "drive method: 1/2 duty, 1/2 ...
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31 views
Configuring GPIO directions for I2S interface
I am working on integrating a WM8731 audio codec chip with an AM335X processor. This is my first time working with I2S and I want to make sure I understand it correctly for configuring GPIO directions....
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1answer
32 views
How to configure a clock rate of 50 Hz with a prescaler with TI Microcontrollers?
I need to configure a display that updates its values with f = 50 Hz.
Since the CPU works with 16 MHz and the prescaler has a max. value of 256, the min. clock rate I can compute is 62.5 kHz.
How do ...
3
votes
1answer
139 views
Compiler optimization prevents code from running
I was trying to upload a simple code to my board Tiva C EK-TM4C123GXL but it didn't work. I found out that when I turn the optimizer off, the code works fine. This is the code for blinking the on-...
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0answers
20 views
TMS320F28035: Simulink model for the SMO or eSMO block used for sensorless FOC of PMSM
I am a student of BITS Pilani, Hyderabad Campus. I am currently doing my summer internship at Analogics Tech India Limited - Hyderabad. I am working on a project to create a Simulink model for ...
2
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2answers
252 views
Configuring fuel gauge IC (BQ35100) with USB-I2C converter
I want to use TI's BQ35100 fuel gauge IC for my circuit. As per this instructional video, I would need an evaluation board and a communications interface adapter to configure the IC. Could I just use ...
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30 views
TPS55165Q1 does not work in boost mode
I need a power supply that delivers 12v with an input between 8v and 35v. That's the reason I bought a couple of TPS55165Q1 from Texas instruments. I've made 3 different PCBs with a similar circuit. ...
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1answer
55 views
Buck/Boost converter TPS63070RNMT is not working properly
I am working on a Buck/Boost converter design which is based on Buck/Boost converter TPS63070RNMT. Below is the schematic design. All the selected components are as per the Section 9 of the datasheet.
...
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0answers
24 views
Is there a Energy Harvesting Power Management and Battery Charging EVM dev kit (e.g. BQ25504) with easily adjustable voltage thresholds?
I have a BQ25504EVM-674 Energy Harvesting Power Management with Battery Charging (EHM) development board by Texas Instruments. It fulfills my requirement of charging an energy store (e.g. supercap/...
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0answers
144 views
Generate ePWM with F28379D
I'm trying to generate an EPWM signal with my Launchpad from Texas Instruments. I want it to be 50 Hz with a pulse of ~1 milliseconds in order to turn a servomotor (SG90) to -90°. This is the code I ...
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0answers
62 views
how to enlarge the reading range between the 13.56MHz NFC reader and tags with ISO15693?
I use TI devices, DLP7970ABP and RF430FRL152H tag. In order to enlarge the reading range, I buy a power amplifier and a large antenna(430mm*330mm). If I only disconnect the original antenna on the ...
0
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2answers
91 views
Buck Converter won't switch properly
I'm trying to use TI's LMR16006 Simple Switcher Buck Converter to regulate 48V down to 5V on my circuit.
I used TI's WebBench tool to calculate component values for their reference design, and had a ...
1
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2answers
52 views
High level present in a pin of a non-powered IC can damage it?
I'm using a TXS0108E to convert from 5V to 3.3V and vice versa. The schematic is below:
In the datasheet, in section 6, I read the following:
Voltage applied to any output in the high-impedance or ...
2
votes
4answers
513 views
Audio Conversion With ADS1243
How can I use the TI ADS1243 8-channel ADC to convert a line-level audio signal (ideally balanced) to a digital 24-bit (as stated on data-sheet) stream.
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1answer
27 views
Selecting switching regulator components based on cost and performance
I'm designing a PCB which requires 3.3V and 9V power regulation. Eventually I plan on building a fair amount of these boards, so I want to plan my design so I'm able to buy components in bulk if ...
2
votes
1answer
132 views
Will a buck converter allow current to pass through if Vin is less than the configured output voltage?
In general, will a buck converter allow current to pass through if Vin is less than the configured output voltage?
Specifically, I'm reading the TPS54308 datasheet and I'm not seeing an answer to my ...
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0answers
59 views
Buck/Boost Regulator Problems (TPS63070)
Questions:
1.) Why do input voltages of 9v and higher cause the regulator to output voltages in the range of 1.2v to 2.0v instead of the configured 3.4v if a load is connected to the output when 9v ...
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0answers
50 views
TLC5940 SOUT/SIN signal broken after 4th daisy-chained IC
I have a PCB with 5 TLC5940's daisy-chained. The first 4 work fine, but the fifth doesn't work. The LEDs connected to that one just go on at full brightness and that's it. When I measure the SOUT to ...
0
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1answer
48 views
Android NFC library - Command not recognized
To access more than 2kb of data from TI Rf430 transponder IC, a custom command (0xC0) in specific format needs to be sent. On sending the custom command, command not recognized (0x01) is the response ...
7
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1answer
141 views
Why use marks on the PCB solder layer?
I was studying a Texas Instrument reference board and would like to understand some topologies and PCB routing techniques. The project is a 230-V, 3.5-kW PFC with >98% Efficiency.
Here's the ...
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0answers
57 views
flash a .BIN with openOCD
I'm using a TI micro controller TM4C1230C3PM to flash a .bin using JTAG and openOCD .i have a board with tag connection tc2050 , I have everything connected but when i open the command window of ...
0
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1answer
53 views
Embedded web server
I am working on a college project in which I want to embed a http web server on a TIVA launchpad eval board. I have been looking through the internet for any guidance on the subject but the ...
0
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1answer
34 views
altium TI webbench, populate footprint in schematic
I have exported a design from Ti webbench in Altium format. I have used "project-component links" to link up the schematic and PCB.
The PCB has footprints set but the schematic does not which causes ...
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1answer
239 views
How does soft start work in TI buck regulators?
I am planning to use "TPS54341" in my design.
I am curious about how the soft start circuit internally works in TI regulators.
The datasheet explains to how to use it, however, does not go in much ...
1
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1answer
139 views
Systems similar to TI's PRUs [closed]
I have been working with TI's PRUs on the am335x, equipped on the BeagleBone Black. I would like to know if other hardware manufactures offer similar systems. I am doing my Bachelor Thesis on this ...
5
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2answers
643 views
DP83848 + STM32 & Failed EMC (massive spikes of 25MHz crystal harmonics)
So we've failed EMC two times now because of spikes of 25 MHz harmonics from 175 MHz to 300 MHz, especially 175 MHz, 225 MHz and 275 MHz with peaks easily 30-40 dBuV above noise floor measured with ...
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1answer
186 views
C Language Pointers Question [closed]
Not sure if this is the correct place to post a programming based question so will have a go anyway.
Attached below is a piece of code and a table where I have to fill in the blanks. Just to clarify, ...
0
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4answers
318 views
STM32F103C8T6 - I2C communication with TI FuelGauge BQ78350
I am trying to establish communication between TI BQ78350 FuelGauge and STM32F103C8T6 using I2C/SMBus. The following is the I2C configuration used for the standard HAL I2C library.
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2
votes
1answer
65 views
LM2917 draws too much current
I built a prototype of a frequency-to-voltage converter using a LM2917 following exactly the "Minimum Component Tachometer Diagram" example schematic - just to play a bit and understand how it works.
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0
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1answer
30 views
Diifference between INA827AIDGK & INA827AIDGKR
Whats the difference between the same package of the IC INA827 - INA827AIDGK vs INA827AIDGKR?
The datasheet makes no mention of any differences.
Except in in.element14.com
where INA827AIDGK is ...
1
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1answer
93 views
How are ESCs (for BLDC motors) different from Texas Instruments sensorless Instaspin kits?
I have never used an ESC before but are they current (torque controlled) or speed controlled? If we vary the load suddenly ,will it stop or it can identify the rotor position and maintain the speed ?
...
0
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2answers
283 views
Issue using pspice .lib in ltspice - Unknown Parameter
I received an unencrypted PSpice model of a TI Boost Converter (TPS43061) and I am trying to use it in LTSpice but I'm getting the following error and I'm not sure what I can do about it.
Unknown ...
0
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1answer
77 views
Making sense of TI power-designer sims
After a day of struggling with trying to simulate an LM2678 based buck converter (see: this post) another user suggested using TIs online power designer web bench tool to simulate. Selecting a design ...
1
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1answer
179 views
Relation between Mbits/s and MHz
I am trying to communicate with an ADC via SPI. In the datasheet, It is mentioned, that:
The performance of the ADC161S626 is ensured
over temperature at clock rates of 1 MHz to 5 MHz – DNL +0.8 /...
0
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1answer
332 views
Calculate voltage of a 16-bit differential ADC that gives a two's complement value
I am working with a 16-bit differential ADC and I would like to know the difference between this latter and a single ended ADC especially: How to calculate voltage from the ADC value ?
Is it like ...
0
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1answer
189 views
LM2596 Cin requirements
I'm going to use an LM2596.
My maximum input will be 40V to a fixed output 5V 3A.
I've read in the datasheet that for Cin you need 1.5x for an electrolytic capacitor. So 40V x 1.5 will be some 60V. ...
0
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1answer
131 views
LM2596 TO-263-5 or TO-263-6
Hi just a dumb question that I have to be sure.
I will be using LM2596
It is stated in its description: IC REG BUCK 5V 3A TO263-5
That its package is TO-263-5.
But on its package is TO-263-6, D²Pak (...
1
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2answers
71 views
Memory allocation of constants and statics in structure?
I am working on IIR Filter implementation where I am initializing filter coefficients and memory (form-2 w) memory as follows.
...
0
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1answer
207 views
What is the difference between MCU and TTL screens? [closed]
I'm trying to build a HDMI decoder board for a 4in 480x800 IPS display. I found an HDMI decoder board on adafruit(https://www.adafruit.com/product/2218) which says it works for most 40pin TTL displays....
3
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1answer
571 views
Symmetric vs Asymmetric PWM
I am working on Control of Power Converters, I was reading TI's piccolo DSP ePWM guide and came across symmetric vs asymmetric PWM, I have a good basic understanding about converters, DSP and all.
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