Part Number:BQ20Z95
I have an old product based on the BQ20Z95. I wish to turn off the updating (QEN). Looking at the manual it appears the correct way to do this is using Manufacturer access. I have two batteries, one with Update staus reading 05, the other 04 (and I have seen 07 in the past); Valid numbers for the update code from the Tech Ref Manualare 00 - 03. Can you please advise what I should do to turn off the updating and perhaps resolve the conflict of information. Many thanks
Hi,
I've searched extensively on TI website looking for something like a Buck switcher designed as a battery charge controller, with features such as external FET to reach 5-10A charge current, CC/CV two stage charge profiles, EOC timers, pre-charge current limiting etc for Li-ion chemistry. However key to my requirement is 60V input supply voltage and a charge voltage that can reach the same.
I have not found any suitable IC. Did I miss something? Perhaps TI has some recommendations of how to use lower voltage ICs to operate from these high voltage levels.
Thanks in advance.
Aidan
Part Number:LM5170EVM-BIDIR
Hi team,
On the LM5170EVM-BIDIR, can the 2 channels be set to boost and run in parallel?
Thank you.
Part Number:TPS25940
Dear Team,
We are using TPS25940AQR for circuit protection.
At power ON, we are getting voltage dip as per the below image.
We had verified EN/UVL, OVP as per the graph mentioned in the datasheet. EN/UVL, OVP is exactly the same as mentioned in datasheet.
Also, we had isolated all the output components from the board(output of Efuse) and an external resistive load of 1A is connected.
The below waveform explains the issue
Ch1: FLT# pin voltage with pull up 5V
Ch2: Output 5V supply.
The schematic file is provided.
Part Number:BQ34Z100-G1
I have been working with BQ34Z100-G1 for lead acid battery fuel gauging. As per datasheet Fuel gauge has "Lithium Ion" as default battery chemistry. I want to know how to change it to lead acid.
Part Number:TPS54218
Tool/software:TINA-TI or Spice Models
Hi team,
Does the TPS54x18 family support being clocked from a spread spectrum modulated clock source?
Are there any EMI scans from the TPS54x18 family? Conducted and radiated?
The spice model in TINA shows significant input current spikes if you look at the current into the switcher.
Are these spikes real? For now I edited the exported txt file to match the data around it. I need it to see what the input filtering needs to be. This was with a 3 ohm load.
In LT Spice the unencrypted model has like 80 -100A impulses for current so there is something really wrong there but it could be how I had to set it up.
Please let me know your thoughts.
Thank you.
Part Number:LP5030
The datasheet does NOT provide Package Dimenstion for PCB Footprint Creation.
Please send me the Mechanical Package specifications, and the suggested Footprint layout so I can build my CAD Library Footprint for the design we are doing.
Part Number:UCD9090A
Hi,
When configuring the UCD9090A GPI1 PWM1 pin 22 as a PWM output, the Fusion Power GUI does not appear to allow change of the frequency, with a default set to 10kHz. The option to change frequency is greyed out. Can you tell me how to enable the option to change frequency?
Thank you.
Part Number:TL2843
We currently use the TL2843DR-8. We now require a device with a minimum max operating temperature of 105°C. Which TI part number comes closest electrically and meets this temperature requirement?
Part Number:TPS5410
I am working on a long production life automotive product. So far I have a TPS4510 in a DV level board, but I need to be sure that this part will be available for 10 or more years. If not then some alternate part number.
Part Number:BQ25898D
Hi Ti team,
I am designing our new product with BQ25898D charger and BQ27520-G4 fuel gauge. I have few queries regarding the designa nd if possible could you also review my schematic to make sure everything is correct.
My queries are
1. I have 2 batteries in my system and hence I am using 2 separate circuits with BQ25898D and BQ27520-G4. Can the USB D+ and D- signals connect directly to both the BQ25898D charger and my CPU i.e. do I absolutely need a switching circuit in between to switch the USB D+ and D- lines between my 2 charger and CPU? FYI, I am not using Maxcharge and my charging current limit is 1.5A. I am asking this question to know if the BQ25898D charger will make the USB lines un-usable for other devices when it is doing power negotiation?
2. Is there an option of not connecting the USB lines (D+ and D-) and reply on CPU to send i2C command for charging current? CPU can do the power negotiation with the USB lines and then command BQ25898D charger for current limit (if there is an issue in connecting the USB lines to CPU and charger simultaneously). if CPU is down for any reason, what will be the default charging current limit?
3. We have 2 batteries charging circuit in parallel sharing the input current from a a single USB type C connector. For ins tance, if the input power connected to USB type C is USB SDP (USB500) with a current limit of 500mA to be shared by 2 chargers. Will each charger draw 250mA after they do power negotiation i.e. they will do dynamic power management to limit their input current to 250mA?
4. I would like to turn the BATFET OFF when the battery voltage is below 3V without intervention form software. I believe that is not possible with BQ25898D charger. What I am planning to use is a switch that will be controlled by BQ27520-G4's "BAT_LOW" pin to turn the swithc OFF when battery voltage is below 3V. Is my approach correct here?
Finally, how could I submit my schematic for your review if that is possible.
Thank you in advance.
Regards
Sarath Vijayan
Part Number:BQ34Z100-G1
To quickly begin communicating with the gauge, please follow this quickstart guide: www.ti.com/.../sluubv2
This will get you up and running with 4 V. Set FLASH UPDATE OK VOLTAGE = 1000 mV
After communication has been established, if the cell is less than 5 V, leave the device in less than 5 V mode.
If the battery is greater than 5 V, change VOLTSEL = 1 and then power down the device. Please set the external voltage divider on the board accordingly, as described in: www.ti.com/.../sluu904
With the external divider (16 V, 32 V or 48 V mode) jumper set( and >5 V jumpers set, please power up the device at your higher voltage.
Click on the 'data memory' button on the ribbon in bqStudio to open up the Data memory pane. If the voltage divider is set to 16 V, set voltage divider to 19182. If the voltage divider on the EVM is set to 32 V, set voltage divider to 37364. If the voltage divider on the EVM is set to 48 V, set voltage divider to 55545.
Click on the 'calibrate' button on the ribbon in bqStudio to open up the calibration pane.
Select the checkboxes for 'calibrate cc offset' and 'calibrate board offset' and click the calibrate button.
Once this calibration has finished, please deselect all check boxes and calibrate voltage, as described in this video: training.ti.com/bq34z100-g1-voltage-calibration
Once voltage calibration is finished, perform current calibration, as described in this video: training.ti.com/bq34z100-g1-current-calibration
Next, we will perform a chemID match of your battery.
Replace the power supply with your battery. Hook up your charger. Allow the cell to reach equilibrium at room temp.
Using bqStudio, click on the registers button in the ribbon. Click on Start log to begin logging. Fully charge the cell and then allow the cell to relax. Once relaxed, discharge the cell at a C/20 rate until fully discharged, and allow the cell to fully relax. Now, end the log. For specific instructions with respect to Lead Acid, please refer to section 3.4 of the GPCCHEM guide, found here: www.ti.com/.../slva725
Please create a zip file with the log and config as described in the GPCCHEM guide, linked above. With the archive created, please submit it to the GPCCHEM tool found here: http://www.ti.com/tool/gpcchem
To watch a video guide with respect to single cell devices and lithium-ion chemistry (very similar), performing this above described process,
click on this link: training.ti.com/chemistry-id-matching-online-gpc-tool . Please note: The rest times and charge/discharge rates recommended in the video for litihium ion are not the same for lead acid. Please refer to the GPCCHEM guide instructions in Section 3.4 for the lead acid instructions (linked above).
The GPCCHEM tool will return a recommend chemID for use with your device.
In bqStudio, click on 'Chemistry' in the ribbon. Scroll down and select your chemID. Then, to program the chemID to the device, select the 'Program Selected Chemistry' button.
After successful programming of the chemID, please modify your device parameters for Lead acid gauging with your battery, as described in the device datasheet: www.ti.com/.../bq34z100-g1
The default values for the device are set for lithium ion. Make sure to set the voltage values 'per cell'. The SERIES value should be set to the number of cells in series in your pack. For example, a 12 V lead acid battery has 6 cells in series. The datasheet linked above describes changes that need to be made in detail. Please pay careful attention with respect to section 8.
Once configured, please run a learning cycle that includes two complete discharges. Ensure that update status = 0x06. Please do not manually override the update status to 0x06, as the pack will not be learned.
The basic process of a learning cycle is described in this document: www.ti.com/.../slua777.pdf
In short, for lead acid, the learning cycle should look like this:
0. Configure dataflash, pack chemistry, perform calibration and export GG File (for later comparison)
1. Enable IT
2. Send Reset command (0x0041)
3. Charge the pack to charge termination.
4. Rest until the OCVTAKEN flag sets
5. C/5 Discharge to the termination voltage
6. Rest until the OCVTAKEN flag sets. At this point, QMax should update and the Update Status should increment to 0x05
7. Charge the pack to charge termination
8. Rest until OCVTAKEN flag sets
9. C/5 Discharge to the termination voltage
10. Rest until the OCVTAKEN flag sets. At this point, the Ra table should update and Update Status should increment to 0x06
At this point, the gauge should be fully learned and ready to measure SOC.
Part Number:TPS92691
Hi,
Can you suggest LED drivers that meet below requirements?
Thanks & best regards,
KF
Hello
Do we have solution to replace below LD5536 for 19V & 16V Vout? Thank you.
LD5536R http://www.leadtrend.com.tw/archive/doc/product/sheets/LD5536R-DS-02.pdf
BR
Patrick
Part Number:TPS5430-Q1
Hi All ,
i found the FTA diagram for TPS5430-Q1 stating the undervoltage fault.
- Can you please let me know if the FTA diagram for other fault conditions like over voltage, over current etc.. are separate ?
- Can you please advise from where is the Q value used inside each box derived ?
- Also does FTA exist for all the TI parts only specific ones? If Specific then for which parts is it available ?
thanks
Part Number:LM3150
Tool/software: WEBENCH® Design Tools
Using the circuit provided by Webench our prototype is not performing as expected. It was designed for a 24VDC input and a 12VDC 12Amp output. As soon as we add a load on it the Voltage drops from 12V to 10V and our input capacitors get extremely hot.
The input power supply is 1000W with no current limit. Below is the schematic of the design.
Part Number:BQ25895
Hello I purchased a BQ25895EVM and am having issues understanding how the part is supposed to function. My interpretation of the datasheet says that the output on V_SYS, when running off VBAT, should be V_BAT when greater than VSYS_MIN and then VSYS_MIN when VBAT is less than VSYS_MIN. I'm not getting that behavior and upon looking further at the part diagram I don't see how it could ever do that.
There are a lot of confusing statements in the datasheet like this. "When the battery is below minimum system voltage setting, the BATFET operates in linear mode (LDO mode), and the system is regulated above the minimum system voltage setting."
I was hoping to get a minimum voltage out of VSYS that was always above 3.5V to ease requirements on the downstream converters. I thought about powering everything off PMID, but this seemed like a misuse of the device.
