Part Number: BQ40Z80
Hello Team,
I am having difficulties getting SMBus to work with STM32 boards, do you have a recommended MCU for SMBus communication with the bq40z80?
Thank you,
Joe
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BQ40Z80: What MCU is recommended for use with the bq40z80? Something that has a well documented and frequently used SMBus capability.
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[FAQ] Isolated gate driver FIT rates
Hello,
We are in the process of adding the FIT rates for our isolated gate drivers to our on-line tool, available at: https://www.ti.com/quality/docs/estimator.tsp
In the meanwhile, below are the FIT rates for our isolated gate drivers from TI.
The following failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested, therefore, it is not recommended to compare failure rates.
Device | FIT |
UCC21750-Q1 | 0.4 |
UCC23313 | 0.4 |
UCC21540A | 0.6 |
UCC21732-Q1 | 0.4 |
UCC23511 | 0.4 |
UCC5390-Q1 | 0.4 |
UCC20225A-Q1 | 0.6 |
UCC20225-Q1 | 0.6 |
UCC21530 | 0.6 |
UCC21530-Q1 | 0.6 |
UCC21750 | 0.4 |
UCC21710-Q1 | 0.4 |
UCC21540 | 0.6 |
UCC21541 | 0.6 |
UCC21220A | 0.6 |
UCC23513 | 0.4 |
UCC21222 | 0.6 |
UCC21222-Q1 | 0.6 |
UCC21220 | 0.6 |
UCC21520-Q1 | 0.6 |
UCC5350 | 0.4 |
UCC5390 | 0.4 |
UCC5310 | 0.4 |
UCC5320 | 0.4 |
UCC20225 | 0.6 |
UCC21225A | 0.6 |
ISO5852S-EP | 0.5 |
UCC20520 | 0.6 |
UCC21521 | 0.6 |
ISO5451-Q1 | 0.5 |
ISO5452-Q1 | 0.5 |
ISO5851-Q1 | 0.5 |
ISO5852S-Q1 | 0.5 |
UCC21520 | 0.6 |
ISO5452 | 0.5 |
ISO5852S | 0.5 |
ISO5451 | 0.5 |
ISO5851 | 0.5 |
If you have further questions, please start a new thread and we will assist you.
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BQ21061: Capacitors needed on VINLS and LS/LDO if disabled?
Part Number: BQ21061
We will not be using, and will thus be disabling via I2C register setting, the LS/LDO function of the BQ21061. Do we still need to attach capacitors to those two pins, or can we save the money and leave them unconnected?
Thanks,
Scott
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BQ21061: Why is there an upper limit on IN capacitance?
Part Number: BQ21061
The datasheet for the BQ21061, in Table 39, gives 10 uF as the upper limit for capacitance on the IN pin. Why is there an upper limit? In our design the power rail feeding this pin has more than 10 uF capacitance on it. What will happen, if anything, if the capacitance on IN is >10 uF?
Thanks,
Scott
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UCC28950: UCC28950
Part Number: UCC28950
Hi,
I would like to know more about paralleling multiple phase-shift full-bridge converters using UCC28950. I read that there can be problems with active rectification at the output. Could someone provide more information?
Pablo Oliva
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TLC59711: Is the shift register 224 bits or 244 bits?
Part Number: TLC59711
In this manual, 
on page 20, there's a section called 224-bit shift register that describes the shift register as 224 bits wide but in the next section it mentions a 244 bit shift register. Which one is correct?
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BQ76PL455A-Q1: EM1402EVM
Part Number: BQ76PL455A-Q1
Hi,
I have one question about pl455 registers. (Image below) bq76PL455A-Q1 datasheet recommends set AFE_PCTL to 1. Is it necessary if I use an EM1402EVM?
Thanks
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LP5562: Absolute max ratings
Part Number: LP5562
Can you clarify if the absolute max voltage on the Vdd, Ven, R, G, B, and W pins are independent of each other? The wording in the datasheet is confusing, it says that the max voltage on "pins" is Vdd + 0.3V, so I'm not sure if that applies to the pins listed above.
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TPS23881: TPS23881 Auto mode configuration and control registers
Part Number: TPS23881
I have some questions about how the TPS23881 will behave in auto mode with the following connectivity (see image) and the AUTO pin set to 124kOhm (2-pair, 15.4W). What will the 4-pair ports (ports 0 & 1) do in the case of: (a) 4-pair Class 5 PD connected (b) 2-pair Class 3 PD connected - assume all 4-pairs connected to PD IC through full-bridge rectifiers. Is there any way to have one of these ports disabled in AUTO mode? Also, some of the control registers (particularly 0x12 and 0x14) seem to only have enough bits to control 4 channels?
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Very Small Package LDO
Hi Support,
I need a small size LDO which could support 24-28V input, 5V output, and 10-50mA max current. Please advise.
Thanks.
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LMZ14203: Seeing sawtooth at output of Device
Part Number: LMZ14203
I have a design using a LMZ14203. The input is 24V, the output should be 5.5V. The simulation works fine. When I scope the output I see a 400mVpp sawtooth at about 5KHz.
The nominal DC value is 6V, not the set value of 5.5V. The 400mVpp sawtooth is riding ontop of the DC.
The FB node is incorrect too, at that same 5KHz frequency it spikes to 1V then settle back to the correct 0.8V.
Any ideas, it seems the control loop is not working
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Research Proposal or a new way of storing charge
I would like to know if you accept proposals for research. I am proposing a method to store energy using semiconductors. Now I know your sceptical (believe me I also would be), I am not 100% sure if it will work but its for this exact reason I'd like to submit a proposal for review by your experts. You can review the proposal an decide if the theory is plausible or not. And their after if you'ed support the research or not.
I'll attach the proposal depending on your interest.
Regards
ML Sigabi
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TPS2379: recommended PSE device
Part Number: TPS2379
Hello Experts,
I want know recommended PSE device with TPS2379. Would you suggest it?
- POE port: 1
- 30W
Best Regards,
Fujiwara
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BQ40Z50-R2: bq40z50 FUSE Drive
Part Number: BQ40Z50-R2
We use EVM to verify bq40z50 1S design but Fuse pin output only has 2.6V when VBAT = 3.6V.
Fuse pin output should be equal VBAT-0.1 ~VBAT in bq40z50 Data sheet.. Could you help to confirm it?
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WEBENCH® Tools/LM5146-Q1: About the OVLO design of LM5146-Q1
Part Number: LM5146-Q1
Tool/software: WEBENCH® Design Tools
Hi,
I want to use the LM5146-Q1 in my power module.
The input voltage range is 35V~60V, and I need a OVLO design at the voltage of >65V,
can you help me how to do the OVLO design with LM5146?
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TPS7A05: How can I set the output voltage of '4 electrode LDO'?
Part Number: TPS7A05
I've used 'fixed output voltage LDO's.
But it's first time for me to use variable output voltage LDO.
I want to use TPS7A05 for 1.8V application.
IN is input. EN will be connected with input.
GND is ground.
The last one is OUT, which is output port.
How can I set 1.8V output voltage?
Thank you in advance :)
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BQ25505: the questions about VBAT_OK signal
Part Number: BQ25505
Hi TI Community,
I designed a battery charger circuit based on BQ25505EVM-218. When I tested the voltage on VBAT_OK pin, the one on the BQ25505EVM-218 is stable. But the one on my designed circuit is signaled
as impulses. By the way, I adjusted all the components on my board as the same as BQ25505EVM-218. I want to know what is going on exactly.
Thank you!
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TPS7A84A: TPS7A84A PSRR test
Part Number: TPS7A84A
there is an interesting issue when I was test the PSRR. As we know, it is better for us to remove the input cap, the input caps of TPS7A8400 are removed. If connect the board directly to the power supply, there is about 26kHz reponse on Vin which cause large votlage spike on input, when the load is higher than 0.6A, output voltage drops. could anyone tell me how to remove this spile without adding any cap or filter that affects the injuected signal.
the PSRR test needs injected input signal.
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TPS2373-4EVM-758: Transient voltage issue
Part Number: TPS2373-4EVM-758
Hi
My Customer has question.
Earth the positive side of the DC ORing input and supply power as
48V.
When the48V line is turned off by SW, a transient voltage of about 33V is
generated at the POE port with respect to the Earth.
Is there a countermeasure for this transient voltage?
Please check the attached file for details.
(Please visit the site to view this file)
Best Regard
T Kishi
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TPS61099: TPS61099 CB test certificate
Part Number: TPS61099
Hi Team,
could you please kindly provide TPS61099 CB IEC60950-1 or EN60950-1 certificate report? we need provide to cusotmer and we can't find the relevant information on website.
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