Part Number: TPS3808-EP
The reset pin on this device has the option tp select a RESET delay time. Is this a delay of when the reset is initiated or is it a delay of how long the reset is asserted? For example, in figure 10a of the datasheet, there is a 300ms RESET delay. Does this mean that once the voltage is out of range a RESET is asserted after 300ms or does the reset get asserted for the 300ms?
Part Number: INA234
Hi
I am using 4 INA234 in my design on the same i2c bus. cant get logical reads from shunt voltage, power and current register that will make sense with external power supply measurement.
for :
20mohm shunt register assembled on board
MAX current 0.75A
Current threshold 0.7A
we calculated 1000h for the calibration register
we read:
shunt voltage register [1h] 0280h
bus voltage register [2h] 03c0h - from calculation we get 1.536V - good result
power register [3h] 0168h
current register [4h] 1d10
we measure:
bus voltage = 1.6V
current = 457mA
please explain how to translate the reads to get the measured current.
regards
Neli Janssen
Part Number: ADS1278-EP
Hello,
Other than the higher temperature rating of HT version, how does the ADS1278-EP differ from the ADS1278-HT?
Does the ADS1278-EP have the same die as the ADS1278-HT?
Thanks!
Part Number: SM320F28335-EP
Hello TI Community,
I am working on a TMS320F28335 based ECU project using Code Composer Studio (CCS) and I have been struggling with a Flash execution issue. I would really appreciate your help.
My Setup:
Problem:
while(1) main loop
Part Number: SN74LV8T244-EP
Hi,
Does TI have an IBIS model for the SN74LV8T244-EP octal buffer with tri-state outputs? I am trying to do some signal integrity simulations.
Thank you,
Aidan
Part Number: TMS570LC4357-EP
Hello,
I am currently working with the TMS570LC4357-EP MCU and using HALCoGen to configure the N2HET peripheral. My goal is to use the HET module to read multiple quadrature encoder signals (approximately 7 encoders). I am trying to understand the correct configuration flow inside HALCoGen, particularly for:
Configuring HET pins as input for encoder signals
Setting up edge detection or capture for encoder channels
Understanding the HET logic blocks shown in the HET1 configuration tab
Determining whether there is an existing example project for encoder or input capture using N2HET
I checked the HALCoGen configuration pages (Pin 0–7, CAP 0–7, Edge configuration), but it is not clear how these blocks map to practical applications like encoder decoding.
Could you please help with:
• Any example code or example project for N2HET input capture or encoder interface
• Documentation explaining the HET configuration blocks in HALCoGen
• Recommended approach for handling multiple encoder inputs using N2HET
If there are any application notes, training materials, or reference projects available for the TMS570LC4357 HET module, please share them.
Part Number: UC1842A-EP
Hi,
I am designing a converter from 26V-100V with 550W output power. I have a reference design already with me which uses UC1842-EP, 26V-100V, 300W. How to upgrade the same to 550W. Can I go for interleaved topology with UC1842-EP? Is it possible? or I will use one UC1842-EP and hard parallel the power stage?
Part Number: TPS40170-EP
Hi everyone,
I am designing a buck power supply for 12V input and 3.3V/10A using TPS40170-EP. I wanted to ask if we can parallel the outputs of multiple TP40170-EPs? But my parallel usage will be on different boards. Assume that i have put TPS40170-EP in my power supply and i want to connect in parallel 3 of my produced boards. Is it possible to use this IC as i have mentioned?
Thank for your help.
Hi Asha,
Sense resistor was reduced to 400mohm , around 258mV ripple is observed when ~100mA loaded on 15V. Blue represents output voltage ripple and yellow represents comp pin voltage in the below waveform. Also we observe overshoot on rising edge and ramp down is not smooth. What is the reason for this behaviour.
The ripple has improved here because your loop is now stable with the lower sense resistor. The shape of the ripple is related to your on-time, off-time, and switching frequency. The COMP voltage is stable. This is the lowest ripple you can achieve with your existing value of output capacitor and switching frequency. If you would like to decrease the ripple, you would have to increase the switching frequency and increase your output capacitance. Of course this would also change your loop response, so you would have to re-tune that as well....
2. When C53 was increased to 1uF , with R53 - 4.7k and sense resistor 400mohm, around 3.220V ripple is observed on 15V output.
Looks like this did not make the system more stable. My intended purpose for this exercise, was to see if the loop gain would increase (stability) by decreasing the loop gain.
3. Also due to reduction in sense resistor, there is higher primary current due to which secondary current is also increasing and secondary diode2(20V_ISO output) is going bad which is 100V , 2A Rated.
So reducing sense resistor would be challenging in our design since we have to size up other components.
Please provide the FET current waveforms measured with a current probe, as well as the switch node voltage. I would like to compare these to understand why there is higher peak current.
4. We did not see ripple improvement either by reducing R53 to 1k or increasing C53 to 1uF.
Is there any other suggestion?
Try different values of R53 while keeping C53 with a low value.
5. Just as a trial , we removed C72(10nF) , retaining same values as per schematic ie 2ohm sense resistor , having only C53 100pF on compensation circuit , we see ripple of maximum 500mV for maximum load of ~350mA. But in this case we see oscillations on COMP Pin as below. Also ramp up on ripple voltage is not smooeth. yellow is output voltage ripple and blue is COMP Pin voltage.
This is not recommended, the system is not stable and there will be unpredictable variations between different units.
Thanks,
John
Part Number: UCC28C43-EP
Hello John,
In continuation to our previous query:
2. When C53 was increased to 1uF , with R53 - 4.7k and sense resistor 400mohm, around 3.220V ripple is observed on 15V output.
What is the reason for oscillating COMP Pin voltage?
3. Also due to reduction in sense resistor, there is higher primary current due to which secondary current is also increasing and secondary diode2(20V_ISO output) is going bad which is 100V , 2A Rated.
So reducing sense resistor would be challenging in our design since we have to size up other components.
4. We did not see ripple improvement either by reducing R53 to 1k or increasing C53 to 1uF.
Is there any other suggestion?
5. Just as a trial , we removed C72(10nF) , retaining same values as per schematic ie 2ohm sense resistor , having only C53 100pF on compensation circuit , we see ripple of maximum 500mV for maximum load of ~350mA. But in this case we see oscillations on COMP Pin as below. Also ramp up on ripple voltage is not smooeth. yellow is output voltage ripple and blue is COMP Pin voltage.
Can we go with this approach? will there be any issue because of this? Why are we observing oscillations on COMP Pin?
Thanks!
