Part Number:TPS92602-Q1
I read from the datasheet that the maximum voltage rating for the ICTRLx pins is 3.6V, but what if the pin was fed 5.6V through a high resistance, like 10kΩ? That would limit the current to (5.6V-1.5V)/10kΩ = 410uA. Would the TPC92602B survive and function properly if this were the case?
Thanks,
Joe W.
Part Number:BQ24195
bq24195 support,
If using this charger with a supercap, is the bq24195 going to give a fault (likely an Input Fault REG09 bit 5:4) the first time the supercap is charged and the voltage is 0V? This would be a different scenario from the Li-Ion. It's not really a fault, and the charge should begin.
Thanks,
Darren
Part Number:LMR64010
Tool/software: WEBENCH® Design Tools
HI,
Designing an 8 to 10V input, 24V output at ~20 mA step up supply. Started on WEBENCH, selected LMR64010. With Startup simulation, output just goes to ~ 0.5 V below input (switching diode drop) and doesn't go up to 24V. I tried a couple of other designs from WEBENCH and it seems that if Bode Plot option appears in Simulation, Startup simulation works as expected, if Bode Plot option is missing, it just outputs Vin-0.5V.
Is this normal or expected? Will LMR64010 work properly, or should I use one of the chips which simulates properly?
Thanks,
Randy
Part Number:BQ40Z60
During testing of our battery board (cell configuration 4S2P) I found that the indicated battery capacity (RSOC/ASOC) drops over time when the board is on external power and the charger and/or the fets are disabled. When I than charge the set, it will not reach 100% charge level any more (because the cells are not discharged). Only after a full discharge of the pack I can reach 100% RSOC again.
I have included a log file of this case. The board is on external power, with fets and charger disabled with a full battery. The RSOC starts at 100% and drops with stes in 24 hours to 67%. The workaround is simple of course (don't disable the fets or the charger) but I wonder what causes this behavior. (Please visit the site to view this file)
Part Number:LM5085
I'm using the LM5085 buck controller to create a 48V to 24V DC Buck Converter with a 8.8A Load
Thus far I have been able to get a 6A load to work but when the load is increased to 7A the transistor shorts out. The circuit went back to working with a 6A load when I replaced the transistor with a new one.
Here is the schematic:
Here's the board layout:
The transistor that is dying is SUD09P10-195-GE3
I know I need to work on shrinking the current loops but I don't believe that is the source of the current problem.
In case it is relevant, I have to switch to using MFA420PS48 (48V 8.8A) instead of a bench top power supply to test the 7A load.
Part Number:PTH08080W
Hello,
Is it possible to use a digital potentiometer connected between pin 4 and GND to remotely set the output voltage ?
Is there any limitation?
Thank you,
regards
Sam
Part Number:BQ28Z610
Hello.
My problem is that RSOC can change instantly to 0% during charging at low temperature (slightly below 10 degC) and FullChargeCapacity is also set to 0 mAh. After that capacity slowly recovering to normal value, but it is a long process. That behavoiur looks wrong.
Device is normally works in dsg mode with low temperatures, even -20 degC, so this is a problem of charging.
I've read that Gauging Parameter Calculator: Optimize room and low temp performance Impedance Track gauges can help, but in this test charging should be done at room temperature, so I don't quite understand how this can help.
Also there's problem with GPC Tool - Upload - it doesn't send test results already a few days, although it worked before.
Thanks a lot.
Part Number:TPS92691
Hello,
After reading the document datasheet I do not have enough clear the dimming frequency range for this device.
I am not sure about the upper limmit and I would like to know it. I mean, does it accept 30KHz or it doesn't?.
I have seen some of the application notes for this device (Boost and SEPIC), but all of them use a PWM signal that is 1KHz at the most as an upper limit.
In my case, I want to design a step-down converter whith TPS92691 and the pwm signal comes from an external device (microcontroller).
Wating for your response.
Regards,
Part Number:BQ34Z100-G1
Hello everyone,
If we set our circuit according to table 28 and our case is table 29, does this bother the BQ34z100?
Or is it more in the opposite case (program in table 29 and be in the case Table 28)?
Thanks for your support.
Part Number:TPS54A20
Tool/software:TINA-TI or Spice Models
TI,
I'm writing because I have been working with TI-TINA models to simulate the transient behavior of the TPS54A20, the issue is that the third party model I need to properly simulate feedback that feeds the FB pin on the TPS has an encrypted model for PSpice.
The third party manufacturer has their part available in LTSpice's library, so I can use that to model the feedback input, but TI's TPS54A20 PSpice model is encrypted as well. So I cant model the full loop.
Therefore I have the same problem regardless of which tool I use it seems, with the exception of PSpice.
If I use TI-TINA, then the TPS54A20 can simulate, but the third party component cant because it is PSpice encrypted.
If I use LTSpice, then the third party component can simulate, but the TPS54A20 transient model cant because it is PSpice encrypted.
So I the only solution I see here is to (a) get PSpice (b) request an unencrypted model from either TI or the third party manufacturer. (c) build a test bench and measure it manually, skipping sim altogether.
I'd be interested in other options?
Thanks
Part Number:UCD90320
Hello,
We use UDC90320 in a project. There is something that I don't understand.
I have a GPI which is a logical temperature sensor output. Enable re-sequence (in the fault response tab) is checked.
If I set Max Re-Sequence to unlimited and the Time Between Re-Sequences to 4000ms (in the global/misc tab), when the GPI fault disappear, the rail starts again.
If I set Max Re-Sequence to 3and the Time Between Re-Sequences to 4000ms (in the global/misc tab), when the GPI fault disappear (after let's say 100seconds), the rail starts again! => why? I do not expect it to so, because after 100s the retries should be exhausted.
Thanks in advance,
Part Number:TPS54331
hi, This is Erwin,
My customer is curious about pulse skipping Eco-mode of TPS54331,
we hope to know, it the device enter pulse skipping Eco-mode, how it works internally?
we have seen some description in the datasheet, but we are stil not so clear about this?
could you tell us more detail? we 'll appreciate you very much if you can show us some waveform to understand it.
Thank you very much
Erwin
Part Number:SM74611
On page 5 Figure 1 of the datasheet
http://www.ti.com/lit/ds/symlink/sm74611.pdf
The average forward drop starts at a current of 2A.
Is a current draw of less than 2A undefined?
Furthermore, is this device recommended for applications where the current is less than 2A?
Part Number:TPS56C215
Hi team,
We found the recommended max. output capacitance is 500uF in datasheet.
Is there any potential risk if the application output capacitance exceeds 500uF? Thanks!
Best regards,
Sam Ting
Part Number:TPS65320D-Q1
In the data sheet it states:
"7.3.5 Enable and Undervoltage Lockout
The TPS65320D-Q1 device enable pins (EN1 and EN2) are high-voltage-tolerant input pins with an internal pulldown circuit..."
Can you tell us what the value (i.e. strength) of those internal pulldowns are?
Thanks!
Sal
Part Number:BQ78350-R1
Hi Team,
The bq78350-R1 has a voltage-based shutdown mechanism that seems to only take cell voltage into account per the shutdown conditions table. However, my customer noticed that when a charge current is present (injected over the shunt so there's no VAUX voltage) the gauge would not shut down. Is there an undocumented condition that the current is 0 or in the discharge direction for it to enter shutdown? Some older gauges document this requirement.
Thanks,
Antonio
