Part Number: TPS74801
Dear Sir,
We are designing with TPS74801DRCR for our below listed power requirement. Kindly let us know if there are any concerns with the selected input to output voltage and current requirement.
we are using 5 device to generate below listed voltages
Input = 5V,
Output Voltage @ Current requirement:
3.3V @ 1.5A
1.8V @ 1.5A
1.2V @ 1.5A
1V @ 1.5A
Input = 3.3V,
Output Voltage @ Current requirement:
1.5V @ 1.5A
Best Regards,
Shashi.
Part Number: BQ24773
Hello
Previously, I worked with BQ24770 and now I need to work with BQ24773.
I identified only one difference between them. The BQ24773 needs 1.8V connected via a 10K resistor on the SDA and SCL pins, while the BQ24770 needs 3.3V.
Could I keep 3.3V on the BQ24773 too?
Another point, the PROCHOT Pin is also connected with the 10K resistor at 3.3V, could I connect the PROCHOT Pin at 1.8V?
I would like to use only one voltage regulator , 1.8V or 3.3V.
Thank you
Part Number: BQ76920
I have a board with a BQ76920, and external balancing circuit that was designed after http://www.ti.com/lit/ug/slvu925c/slvu925c.pdf
When setting balancing bits, and reading back the register to confirm that the bits are set, there is no apparent difference in current being drawn from that cell (scoping 1 ohm shunt) even though we should see between a 30-40 mA increase. Upon further probing, the FET never appears to be set. The source-drain voltage is that of the cell, and the gate voltage was about equal to the source voltage. This stayed steady as the balance bit for the corresponding flipped on and off.
Part Number: UC3825
Dear TI experts,
There is a question about UC3825. Our customer use it in a Ultrasonic massager. Poor finished product testing. Some products are weak in ultrasound, some products are not ultrasonic and the chip is damaged.
I tested the following PIN15-VCC and PIN14-PWM, which I think is not normal because of ripple and PWM size waves. Does this have an impact on chip work? Can UC3825 work in this situation?
Just tell me if you have any suggestions~ If you can explain it in detail it would be nice. Thank you·
Regards,
Robin
Part Number: BQ27Z561
Hello,
We've successfully generated ChemID and Golden Image with help of bqStudio. Now the problem is How can we Download Golden Image to Our Custom board (Connected to MCU).
Please provide steps or Documents for that.
Part Number: BQ77904
Hi Folks,
Our application has a non-removable 8S4P LiFePO4 battery pack and I'm in charge of designing the BMS for the system. The BQ77904 chip looks promising. I'd use two of them to handle the 8 cells. I've looked at the datasheet but I can't seem to figure out how to set up the circuit so a UV fault can be recovered by plugging in the charger and raising the cell's voltages. We can't use the remove-the-load resetting method.
Another question - When do you recommend using external mosfets to control the balancing current?
Thanks,
Richard
Part Number: LP8860-Q1
Hi,
What is the minimum current load on the OUTn pins? I'm looking to run 4 chains of LEDs at low current (a few mA per chain) - is such a low load likely to cause any issues?
Also, is there a minimum load for the boost converter?
Many thanks
Part Number: LM5118
Hello,
I am designing a buck-boost converter with these specifications:
18<Vin<32V, being able to withstand a peak of 65V
4.5V<Vout<50V
Io<0.5A
Theoretically, if I use a digital potentiometer instead of Rfbb, I should be able to control Vo such a way that I can have a step-down or step-up converter in one DC/DC.
Do you think it is possible or it is going to be very difficult to get a stable converter for the full Vo range?
I am thinking on LM5118. Do you advice another one?
Regards,
David
Part Number: BQ40Z50-R3-DEVICE-FW
Hi
I have been trying to activate the permanent failure protection for BQ40Z50R3 (activating the fuse pin). I set overvoltage threshold level as 3.950V, but I have observed that fuse pin remains 0V even though cell voltage reaches more than 3.950V. If the settings are correct and BQ40Z50R3 detect PF for OVP, I am expecting the fuse pin goes around 7V, but the voltage on the pin is zero. I set the recoverable OVP as 4.5V in order to test permanent failure.
I am attaching settings file for you to review. Please let me know all the settings are correct.(Please visit the site to view this file)
Thanks and Regards
Dileep Chacko
Part Number: BQ27542-G1
Part Number: TPS23861
Hi team,
We want to check what's the reason of the gap between read voltage data (above 57.2v) & real voltage (use meter to get 56.2v) for TPS23861.
Thanks.
Part Number: BQ40Z50-R3-DEVICE-FW
Hi
This form is for BQ40Z50R3.
I set the overcurrent protection as 10000mA and -10000mA, but when I charge or discharge the battery overcurrent protection triggers in -4200mA and 3100mA. I have attached the configuration files for you to review. can you please check all settings are correct.
Thanks and Regards(Please visit the site to view this file)
Dileep Chacko
Part Number: BQ76930
Dear all
I have some questions about this bq7693003 device, please help me to reply, Thanks a lot.
1. What is the effect of voltage and temperature on ADC cell voltage accuracy? Is the higher temperature,the higher the accuracy ?
2. Please show me all factors that effect the ADC cell voltage accuracy, It is very important. Thanks.
3. The Lead/ball finish of bq7693003DBTR device is NiPdAu, Does the pins is only plating bottom ? On both sides of the pins is plating ?
4. For SMT, could you share me the temperature curve,and share me the matters need attention for prevent cold solder joint .
Part Number: ULN2003AI
Hi Team,
Our customer would like to confirm the minimum Rcoil output current because the design parameter page in the data sheet only indicates 20 mA to 300 mA per channel.
Our customer would like to drive 10mA only if this is possible.
Thanks!
Jonathan
Part Number: LM117
I am trying to use a voltage regulator to drop the voltage from 15V to about 3.3 V. The output equation has an I_adj variable in the output equation. How do I determine this value?
Part Number: LM5050-1
Greetings to you.
I am having an oscillation problem on the gate drive pin on the LM5050-1. With a light load the gate drive pin is good. With a 10A load, the gate drive pin is good. However, if I have a 10A load, and the load has a PWM drive of 16khz with any duty cycle, the gate drive pin ramps up and pulls down hard. The ramp up is a much lower rate than the 16khz PWM.
Please see attached pictures. Power supply is 20V. MOSFET RDSon=3.3 millohms. Circuit used is Figure 24 of data sheet, except output load capacitors = 2000uf. This oscillation problem causes high MOSFET power dissipation. How can I solve this problem? Thank you!
Part Number: BQ24075
We are developing a board based on the BQ24075RGTR charger and the BQ27441DRZT-G1A fuel gauge and wanted to know if we could get support from TI to verify our design.
It's for charging and running of a single cell 4.2V lipo battery.
Below is the schematic, is this appropriate?
Part Number: BQ34Z100-G1
We have been using this fuel gauge on our battery packs for about 2 months / ~100 cycles and recently the state of charge estimations have been very inconsistent and I am not sure what is going on. The types of problems we are seeing are like in the image below - we put a battery pack into our drone system, take it off to fly it and the state of charge estimation changes from 100% to 0% in just 2 minutes (the actual flight time we are achieving is closer to 24 minutes). The temperature of the cells is usually above 40C as we have been operating it in hot environments.
I have confirmed that the current and voltage readings the FG (fuel gauge) is getting are accurate.
What parameters can I look at to figure out what is going on with this device?
Also, what is the required 'relaxation' time the FG to accurately make its measurements?
I have attached my golden image file.
Thank you,
> Andrew
[019]
Part Number: BQ24650
I have an application in which a boost converter (TPS61087) runs directly from my LiIon battery, which is charged using BQ24650. The BQ24650 data sheet specifies specific, low-value output capacitors that are commensurate with its feedback compensation loop. In my case, 10uF. But the boost converter wants at least twice that on its input. So, what happens if I use a larger output cap? Or, is it sufficient to isolate the boost input caps from the charger using a low-value resistance?
Part Number: BQ34Z100-G1
Is there a list of Gauging Error Tips for BQ34Z100-G1?
Something similar to SLUA726 below created for BQ78350 page 15?