Part Number: TPS659039-Q1
Hi team,
Customer is using TPS659039-Q1 to powering TDA2SG, with OTP version of 0X87, and they got below problem, please help on it.
1. the power on and power off sequence/requirement of RPWRON/ PWRON/ PWRDOWN/ RESETIN/ RESET_OUT signal? And do we have materials to introduce these signal?
2. Is LONG_PRESS_KEY.LPK_TIME bits setting by below LONG_PRESS_KEY bit?
Thanks.
Part Number: BQ34Z100-G1
Dear TI guys,
I want to develop a software for calibration of bq34z100-g1,please supply the bqTester source code to me for reference,tks!
Part Number: BQ25713
Hello
REG0x32[2] is set ACOC value that is 1.33 or 2 times to ILIM2. For BQ25713 datasheet, Deglitch time to trigger is 250ms. But on description is 100uS as below. BQ25700 is 250us. Which deglitch time to trigger ACOC is correct?
Another question, while set REG0x01[2]=1. what is efficiency？
ＢＲ
Ｐａｔｒｉｃｋ
Part Number: TPS543B20
Hello expert,
Customer wants to use TPS543B20 to achieve adjustable Vout application. They want to know if they can use current DAC to inject current on FB pin and they want to confirm if this way is workable. And also they would like to know how to adjust voltage from 0.6V to over 1.1V since voltage over 1.1V need to use resistor and under 1.1V need to use VSEL. Thanks a lot!
Best regards,
Ann Lien
I would like to know which are the ICs from the family BQ24 that I can use to charge a 2-cell NiMh Battery from 5V USB Bus.
All the BQ24 chargers are for Li-Ion or LiPo Batteries, can I use them also for NiMh / NiCd batteries?
Part Number: BQ25890
Our existing solution for charging a device via USB 2.0 is a combination of the following:
(This setup is as described in the BQ25890 EVM schematics)
However we would like to change the port to USB-C, for reversibility and to take advantage of higher current allowed on this port.
What is the easiest way to convert this design to USB-C?
Is it simply a matter of replacing the TS3USB221?
Best regards, R
Part Number: BQ76930
I have a product design that use 2pcs BQ7693003. I can read the battery voltage and current normally when I use DC power supply to charge.However, when I use the customer's charger to charge the battery, I will encounter the situation that the battery voltage is not updated or the current is not updated.I have found out the reason. The quality of customer's charger interferes with my work of BQ7693003. Excuse me, can I regularly go to boot up BQ7693003 or not? Or is there a better way?
Thank you very much!
Part Number:SM74104
The ~20ns propagation delay times of these parts suggest that they could be operated at frequencies up to ~50MHz. If not, what is the upper frequency limit and what steps must be taken to ensure reliable operation?
Part Number:LM5175
Tool/software: WEBENCH® Design Tools
Hi,
I did a Webench Design with LM5175. Requirements Vin: 11 - 27V, Vout : 24V/10A.
I got my 5 samples last week but they don't work like expected : Output voltage is perfect at 23,98V, but the inductor and the controller is getting really hot. Even with no load, at 12Vin it draws around 0,6Amp, controller reached 90°C before I switched off. The current decreases to 0.1Amp when I increase Vin to 24V, at Vin> Vout the input current goes exessively up again.
Schematic :
What I tried during the last days :
- Changed the boost capacitors to 220nF liek in the TI eval board -> no change
- Changed the VCCcapacitors to 4,7µF like in the TI eval board -> no change
- Doublechecked and replaced all resistors and capacitors at SS , Comp, Mode, RT and Slop -> all ok, same problem
- Changed to Compensation circuit to the values from the eval board -> same problem
- I scoped the four gate signals but at 12Vin they look good to me. High1 is on all the time, Low1 is off, High2 and Low2 switch inverted at 50% with a little delay at turnover.
- Removed the two diodes D2 and D4, just to be sure-> same problem
- Unsoldered one LM5175 to check for shorts under it, nothing found.
- Ordered some LM5176 and replaced the LM5175 in two pcbs, changed the frequency resistor accordingly : Same result with the LM5176, It also get's hot and inductor gets hot.
- unsoldered one of the two parallel transisors at high2 and Low2 to reduce gate capacity -> same problem
- Changed FB resistors to 270k/20k to get closer to the eval board. Output voltage changed to 11,6V but high current at no load stays.-> Same problem
I think I have no more ideas what to try next. Any help is appreciated !
Part Number:BQ25120A
Hi,
I am designing a wearable using BQ25120AYFPR, but having problem that microcontroller can't communicate through I2C. Microcontroller has pullup internal 11k-13k ohm so it should fine. I have another 2 devices connected to I2C bus, but only 2 of them are detected by microcontroller. ( I also build another PCB without those 2 devices, but still microcontroller can't communicate).
VSYS i want to use is by default 1.8V, so pullup internal is about the same.
I am aware about startup delay 70mS or more, and no success.
Please check my schematic if I am doing wrong and miss something there. Is there any solution or idea to solve this? should I share the code in microcontroller if needed.
Thank you very much
Part Number:UCC28950
Hi Ti team,
Sorry for late response and don't know how to re-open the closed thread, so I create a new thread.
The picture shown how I measured primary side current, please see relates thread for info. Now try to fix it by increase secondary side GATE resistor to add more delay time for secondary side.
Actually TI can try it on your EVM at low load and see primary side transformer current.
Now another issue occurred, at low load <40Amp, how to solve the switching noise?
So please advise on below.
1. Please check your EVM at low load, see primary transformer current and advise how to fix it?
2. Switching noise at low load, how to solve this issue?
Thank you,
Suttichai
Part Number:LM73606
I'd like to insert a small resister on CBOOT in serial to 0.47uF capacitor for EMI improvement buck up.
Could you advice the recommended resister value and its accepted range?
Thanks in advance.
S.Sawamoto
Part Number:TPS61030
Hi Team
Would you advise that is it possible to use with Vin > Vout condition even TPS61030 is a boost converter?
My customer will design not to meet the above conditions, but she wants to know what will happen if the above events occur.
As long as the customer confirmed it on the actual machine, it was operating at SW duty 100%.
Thanks
Best regards,
Shidara
Part Number:UCC2897A
Dear Sir,
UCC2897A's PMP8380 reference circuit T2 (PA0801.004) write 75uH, but the specification is as follows, write 153uH, which is the correct?
PMP8380 Transformer datasheet: productfinder.pulseeng.com/.../SPM2007_52.pdf
Best Regards,
Sam
I want a charger IC ， Requirements are as follows，and i need power path thanks！！！
Part Number:DRV595
I'm looking at using the DRV595 for a peliter application. If I understand the data sheet I can use the single ended output (0-2.7V) from a DAC on the IN+ input and bias the IN- output to about 1.4V.
Does this mean that with the ADC powered down (high impedance DAC output) that the DRV595 will producting output given the 1.4V difference between the IN- and IN+ pins or does the input stage of the DRV595 have a larger internal resistance between the IN- and IN+ pins ensuring that in this situation the output is also zero?
Part Number:TPS65283
Hi,
In our application, TPS65283 was used for our stepping down voltage levels from 14V to 5V and 14V to 12V.
14V to 5V circuit functions properly and no issues with it.
Whereas the 14V to 12V circuit has the below-mentioned problem.
The image attached with this query captures the circuit implementation for 14V to 12V
1. The output of the 14 to 12V DC-DC converter oscillates from 5V to 10.5V constantly.
We are not able to see constant output like 5V.
2. When one the Buck channel in the converter oscillates the other Buck does not even turn on even after its enabled.
3. While trying to enable converter it gets heated up after some time.
Later we found that the operating range of the DC-DC is from 0.6 to 9V (voltage output) and LX and LX2 output is 20V Max.
When datasheet shows the above-mentioned details the quick search page of the TI website shows the operating output voltage of this part no is 16V.
We find dissimilarity in the details of the PMIC between quick search page and datasheet.
Could you please help with this.
Thanks and warm regards,
Sakthivishnu(Please visit the site to view this file)
