I ran the TI chem ID discharge test on some batteries, but I'm trying to figure out what the number resulting from the GPC report test corresponds to for cell chemistry. Where can I find the chem ID database? Thanks for your time.
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Chem ID
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TPS7A83A: Application
Part Number:TPS7A83A
Hello,
I am using TPS7A83A (For 5V to 3.3V/2A) by connecting 800mV,100mV,1.6V pins to GND and similar way for 5V --> 2.5V/2A regulator by connecting 100mV,1.6V pins to GND.
Using TPS7A84A :
For 5V --> 1.2V/3A regulator by connecting 400mV pins to GND.
For 2.5V --> 1.2V/3A regulator by connecting 400mV pins to GND.
Could you please suggest is it okay to use the respective ICs for above applications ?
Thanks & Regards
Ganapathi
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TPS65150: Output voltage failure
Part Number:TPS65150
Hey Everyone,
We have a prototype board built and the TPS65150 has been working perfect for a couple weeks now. The system was left on for about 72 hours this last weekend and it can no longer regulate the output voltage. Replaced the main rectifier and both charger pump diodes with no change. I have also removed the secondary voltage regulator U10 so remove this as a potential cause.
LCD screen has been removed at this point and the 3 output voltages along with the 5V line have been attached. VS goes up to the correct 13.5V value and than comes back down to VIN. VGL also goes down to its correct value and than to -VIN but VGH doesn't get much above 1V or so. As stated above, the entire circuit worked great at first.
LCD Specs:
AVDD = 8.2V @ 70mA
VGH = 22V @ 750uA
VGL = -7V @ 750uA
Any help would be great.
Mark
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UCC28911: Which voltage level in my VS waveform is used for sampling and OV fault check?
Part Number:UCC28911
Above waveform, CH3 is VS signal, slightly different shape from datasheet Figure22. VS Voltage. I assume 4.2V from the Y2(3) cursor point I measured would be the ideal point for sampling, but the waveform peak VS voltage is >4.6V (. Please help check if above VS waveform is ok and if >4.6V could trigger OV fault. Thanks.
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TPS54260: Split Rail Calculator for SWIFT DC/DC Converters page is empty
Part Number:TPS54260
I'm trying to get the calculator tool mentioned in slva369a (reference 7 to SLVC225). The link in the PDF leads to the 404 page, but I managed to find a new location of the tool here: http://www.ti.com/tool/SWIFTPOSNEG-CALC
However, the page is empty. Is this calculator tool still available?
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LM34914: LM34914 in buck-boost configuration
Part Number:LM34914
Hi,
I was looking for the LM34914QuickStartCalculator.xls. At one time is was listed on the following website.
www.ti.com/.../lm34914quick-calc
Now that website doens't have a valid link. How can I get a copy of this spreadsheet?
Thanks,
Scott
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TPS7A4501-SP: SHDN Pin Voltage > VIN
Part Number:TPS7A4501-SP
Is there any issue having the /SHDN pin controlled by a voltage greater than the VIN voltage. For example, with VIN = 5.5V, can /SHDN = 9V (or maybe higher)?
Abs max ratings on data sheet indicate a max voltage of 22V with no reference to VIN voltage.
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TLV742P: at what point is a heat sink required?
Part Number:TLV757P
I am considering using a TLV75733PDRVR LDO to drop 4V to 3.3V while driving up to 1A, thus needing to dissipate around 0.7 watts. Would an additional heat sink be required in this situation, assuming the PCB provides a large copper plane well thermally connected to the TLV757P's thermal pad? Page 18 of its spec sheet was kinda vague on this. I am using a 4-layer FR4 board with 3 oz/ft^2 copper on its outer layers and otherwise standard PCB fab technologies. I can provide an array of plated vias (how many do I need?) under the device to conduct heat from the top layer to the bottom layer. How big of a total area of copper should exposed on the top and bottom layers to be ok with this amount heat dissipation? I don't know how to calculate this; any pointers would be a big help. Thanks heaps in advance.
Also, how does the answer change if this LDO were used to drop all the way down from 5V (again, providing 3.3V at up to 1A), thus needing to dissipate around 1.7 watts?
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TPS92661-Q1: flash issue
Part Number:TPS92661-Q1
Hi Sir,
We met an issue when using TPS92661 , the condition is as below,
The schematic is as below, when using 3 LED as series connection , there is no problem including communication interface(read write data) ,but when LED over 2 LED, the LED is flashing. we don't know why and need your help
The power of LED came from power supply
1). The target is driver 8 LED( PIN LED12(+)-LED10(GND), the other connected to GND as datasheet
2).CLK Freq. = 307kHz for Baud rate = 19200 bps
3).TPS92661 EN set high
4).check PWR bit = 1
5).write PCKDIV = 0x00
6).LEDON(addr 0Ah-0Eh) =1
7).LEDOFF(addr 2Ah-2Eh) = 1023
8).ENON(addr B0h-B1h) = FFh
8).ENOFF(addr B2h-B3h) = FFh
9).check Diagnostic reg. OK
10).PWM Freq. = 150Hz(DPWR2[2:0] 0b000,DDEC[1:0] 0b00)
The test appears as follows：
1、When controlling LED12（LEDOFF(addr 2Dh) = 10）,I found LED12 flashing;When controlling LED12（LEDOFF(addr 2Dh) = 1023）,LED12 lights up normally.
2、when LED over 2 LED, the LED is flashing?
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WEBENCH® Tools/TPS62180: Different theta ja values in datasheet and webench power designer
Part Number:TPS62180
Tool/software: WEBENCH® Design Tools
Hi,
In the datasheet of TPS62180, theta ja value is mentioned as 61.5 degC/W where as in Webench power designer, the corresponding value is 22.5 degC/W. Which value is correct ?
Which value shall i choose for the analysis ?
Thanks and Regards,
Vishak
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TPS63700: TPS63700 startup issue
Part Number:TPS63700
Hi,
I am using TPS63700 for -5V supply from 5V. Sometimes the converter gives no output, having a random behavior that sometimes it is working fine. I suspect there is a pre-biased output condition. Does this converter supports prebiased startup? if not how to overcome this condition.?
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BQ76940: Discharge Current
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TPS23753AEVM-004: TPS23753A
Part Number:TPS23753AEVM-004
Hi,
I have a mysterious problem. I am using TPS23753AEVM-004 reference design for my PoE based power supply. I have both options. I will use wall adaptor or PoE PD as power supply input. The power section is working well with PoE but its not working with wall adaptor. What will be the problem?
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TPS54331: tps53331
Part Number:TPS54331
(Please visit the site to view this file)
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TPS82084: TPS82084 and TPS82130
Part Number:TPS82084
Hello,
I would like to use TPS82084 and TPS82130 ICs in one of my new designs as these are the newly arrived. I could see "Manufacturing delays have been reported on this product" in mouse website.
Could you please confirm is there any issue with these ICs for new designs or can i continue to use in my new design ?
Thanks & Regards
Ganapathi
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TPS650250: why the VDCDC PWM output shakes?
Part Number:TPS650250
Here is the schematic:
For test, I disable the EN_DCDC1 and EN_DCDC2. And connect the VDCDC3 PIN to a 3.3Ohm resist as a load. And the MODE pin of TSP650250 is tight to VCC_SYS. The VDCDC3 is designed to be 1.3V.
When the 3.3Ohm resist load is not connected, the L3 pin of TPS650250 is a stable PWM with a frequency=2.25MHz. Everything works OK.
But when the 3.3Ohm resist load is connected, the L3 pin PWM output shakes a lot, while the VDCDC3 is still stable. But since the L3 PWM shakes, I can hear the noise.
Figure1 ---- L3 output:
Figure2 ---- VDCDC output = 1.3V:
Figure3 ---- VCC_SYS input:
The inductor I use is VLS201612CX-2R2M, 2.2uH. And the output capacitance is 22uF.
I also tried the 3.3uH inductor in the above table. But the PWM output still shakes.
And I also tried another 2.2uH inductor with smaller ESR, which is shown in the following table, but the PWM output still shakes.
The Question is: Why the L3 pin PWM output shakes?
Thank you.
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TPS650861: Please help on TPS650861 programmning in manufacuring process
Part Number:TPS650861
Hi,
My customer starts to plan building boards and face issue doing programming. Could you please help on the need below? Thanks
- Please help to check the query, “but not sure if this IC have default code , and if this default code can support power on successful then do on-line program”?
- Please share if there is any on-line program tool or script.
- Please share the off-line program fixture PN (programming kit PN)
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BQ25600: QON power consumption
Part Number:BQ25600
1. According to the internal block diagram, there is a pull up resistor on the QON pin. What is this resistance value?
2. If QON is always short to GND for normal operation, what will be the power consumption increase?
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BQ76930: BQ76930 : state of REGOUT in SHIP mode
Part Number:BQ76930
Hello, I want to use the REGOUT output to supply an i2c digital isolator. But to reduce the current consumption on the cells when the battery pack is OFF, I will send the i2c command to switch the bq76930 in SHIP mode. But in SHIP mode, does the REGOUT output will stay ON, or it will be OFF (want to stop the current consumption of the i2c isolator) ?
If it stays ON, I will need to add an optocoupler to shut down the i2c isolator supply.
Regards
Cyril Haenel
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BQ76PL455A: How bq76PL455_GUI communicate to PC?
Part Number:BQ76PL455A
Hi,
I'm trying to play with the bq76PL455EVM but I'm not enable to connect the GUI with the EVM. I'm always getting the "Unable to open COM port" error.
I'm using the TTL-232R-5V cable, like mentionned in the datasheet.
The only connector connected to the EVM is J3 (serial), all the other connectors are disconnected.
It doesn't seems required in the datasheet to add cells array to J1 to make the EVM works.
I tried every possible combination with SW2. What I understood is if I'm a using only one EVM with the GUI, I need to have my board configured in single ended mode.
What I already tried:
- Re-install/Uninstall multiple times the FTDI drivers (VCP + D2XX)
- Everything mentionned in that ticket https://e2e.ti.com/support/power_management/f/196/t/709280?tisearch=e2e-sitesearch&keymatch=bq76PL455A
- Cleaning/Uninstall/Re-install/Active/Desactivate all my COM ports
- Try on Windows 10
- Try on Windows 7
Here is my device manager setup, sorry it's in french:
Here is the configuration of the port (9600 baud rate):
Note that my USB Serial Converter has VCP enable.
Is there a way I can know if the PCB is the problem and not my computer or cable?
Do you have any tips that could help me figure out the problem?
Thanks,
Elio
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