Part Number:LMR14010A
Hi team,
The customer would like to use this device with Vin=24V and Vout=9~19V at 96% duty, but can the device be surely used at 96% duty for 24Vin? The datasheet is saying the Dmax is 96%(typ), so I think the 96% duty for 24VIn has no problem considering a drop of Ron, but I would like to double-check it with you.
Regards,
Ishida
Part Number:TL494
Hello,
Regarding to dead-time control(DTC) on TL494, my customer is asking a question.
They will set maximum duty cycle of DTC with following schematic.
(Question)
According to datasheet, DTC characteristics is following.
This meaning is that:
linear control of duty cycle of DTC from its minimum of 0% to 45% as the input voltage(DTC) is varied from 3.3V to 0 V, respectively.
My understanding is correct? Is it possible to calculate its DTC duty cycle by calculation formula?
Or do you have a data(DTC duty cycle vs DTC input)?
Regards,
Tao 2199
Part Number:TPS7A45
Hello Experts,
My customer is now adopting 10uF capacitor on output of TPS7A4533. And he wants to increase to 22uF or 33uF or more. He wants to know whether there is limitation for output capacitor value. Would you answer it?
Best Regards,
Fujiwara
Part Number:TPS65381A-Q1
Dear Specialists,
My customer is evaluating TPS65381A-Q1 and has questions.
I would be grateful if you could advise.
---
I am evaluating TPS65381A-Q1.
I made software and confirm.
At that time, error Flags (VCP17_OV, VCP12_OV, AVDD_VMON_ERR and BG_ERR1) were detected when power was up.
(1) Are there possibility to occur with some condition at startup?
(2) If these errors are written to the resister, when does the device diagnose.
---
I appreciate your great help in advance.
Best regards,
Shinichi
Part Number:LP8556SQ-EVM
LP8556 Support team
When I confirmed the default configuration data of LP8556-E09 on LP8556SQEVM, I noticed that default data is different from the data in datasheet. And also, GUI tool changed Address:0xA0 to the correct data.
The below is EPROM data(Address A0 to AF) before and after GUI start-up.
Before : D1 CF 2F 02 72 04 80 F6 04 A0 0F 00 00 00 0F 01
After : FF CF 2F 02 72 04 80 F6 04 A0 0F 00 00 00 0F 01
The below is a part of the WRITE processing by GUI tool.
Why does GUI tool re-write the EPROM?
Part Number:LM3409
Hi all,
In a design, I'm using the LN3409QMY as a LED driver.
The LED driver is driven by the enable pin. I noticed that when the IC package reaches 40 degrees, a delay of 300us is introduced between the enable signal and the PGATE output(below 40 degrees the delay is less then 50us).
This delay is unwanted because this way not all the required energy can go through the LED's.
If there a way to reduce this delay?
Thanks,
Stijn
HI,TI employees
I want to make an interface that can charge both heads and tails，however, I am short of space. My design is shown in the following figure, which is built by 4 MOS
Have integrated circuit to be able to achieve this function, what is part number?
Part Number:BQ24296
Hi ti team,
Does TI have support 13 series Li battery charger IC? charger current 3A.?
or have charger ic support 3s-5s stage connection to 13 series ?
thanks!
Part Number:BQ25710
Hi team,
I want to know the exact time when the POR happens and set the defaulted values if powered up from DC source.
I noticed in part 9.3.3 of datasheet that the converter powers up 150ms after Vbus>VVbus_CONVEN. Is that the time when POR takes place?
Thanks.
Part Number:BQ24210
Hi team,
I spent some time studying the data sheet for the temperature control module bq24210 but I couldn't figure out some things about the equation marked as equation 3 as shown below.
Firstly, what is the meaning of the variable marked as V_V45C? If I'm looking at it correctly, the equation is dimensionally incorrect, a resistance cannot be subtracted from the reciprocal of a current.
Second, the equation assumes an NTC thermistor which have a negative temperature coefficient, can this work with a thermistor type with positive temperature coefficient?
P.S. The spelling of thermistor should be revised in the data sheet.
THank you for your time
Part Number:TPS7B7702-Q1
Dear all,
For TPS7B7702-Q1 in our application, Vout is 10.5V.
If Vin drop down to be <10V, will the output shutdown or follow the Vin?
Does Short-to-Battery occurs?
Hello
Is there any current limit device to implement this function: if output current exceeds setted current limit, this device will shut down immediately; not like TPS25921 has two distinct overcurrent protection levels: the current limit (ILIMIT) and the fast-trip threshold (I(FASTRIP)) , only exceeds fast-trip it will be shut down immidiately
Part Number:BQ24161
When I use BQ24161 to set charging current above 1A, I will encounter unstable charging current, sometimes normal current, but most of the time is about 500 mA, using a single cell of 4.2V/2000 mA, using USB and external DC9V power supply, battery voltage has been charging at 500MA from 3.5 to 3.8V, charging from 0V to 3.3V is normal. How to deal with it?
In addition, can the output of SYS voltage be constant when charging? What's found now is that it changes with the voltage of the battery?
Part Number:TPS22953
Hello
Do you have any way to implement Power multiplexing (MUXing) between three power supplies(same 5V voltage) ?
Example added another Power Supply 3(5V) to Figure64 SCH
Part Number:BQ27421-G1
Hi,
I have recently performed relax-charge-relax-discharge cycle with my 450mAh LiCoO2 battery (4.2V max voltage) using BQ27421-G1A EVM and uploaded the log on GPCCHEM.
Report given best chem ID matching with my battery as 3136 with a max deviation of 1.65%. Apart from that report also given below values
| Generic Chem ID | Device/ Voltage/ Chemistry | max DOD error, % |
| 3142 | bq27421-G1D: 4.4V LiCoO2 | 12.71 |
| 354 | bq27411-G1C: 4.35V LiCoO2 | 14.65 |
| 128 | bq27421-G1A: 4.2V LiCoO2 | 15.83 |
| 312 | bq27421-G1B: 4.3V LiCoO2 | 18.91 |
I have some queries based on the report
1. What is the significance of max DOD error% ?
2. What will be the inaccuracy in the SOC reported by the BQ27421-G1A gauge with my 450mAh battery in the filed ?
3. Why max DOD error% is less with G1D & G1C compared to G1A when my battery is supporting max voltage of 4.2V ?
4. What is the importance of Temperature values in the log file to GPCCHEM tool. Will it impact max DOD error% ?
Let me your feedback.
Thanks & Regards
Vidyasagar
Device / Family #1Generic Chem IDDevice/ Voltage/ Chemistrymax DOD error, %3142bq27421-G1D: 4.4V LiCoO212.71354bq27411-G1C: 4.35V LiCoO214.65128bq27421-G1A: 4.2V LiCoO215.83312bq27421-G1B: 4.3V LiCoO218.9
1
Part Number:LM2623
Team,
We have a problem with LM2623: When power supply has a current limit less than 1,8A (5V at VDD) the converter doesn't start and IC is heating up to the point that it gets burned.
When power supply has a current limit over 1,8A (for example 2A), converter starts and is working correctly.
Here is my schematic:
I am afraid that in some cases when current limit is not big enough, this will cause damage of IC (have confirmed one case).
Please note that my converter converts 5V to ~9,3V, and average power consumption is less than 100mA. In Peak (100ms) <1A max.
Can you please advise what to do?
Thanks
TI Customer
Part Number:TPS54160
Hi,
I am Using TPS54160 Ic for Vout= 5V , Input voltage is = 24V and outptu current = 1A
I have simulated the design in WEBENCH and working good. but i want to calculate manually the values for Frequency compensation components.
Till calculating the Crossover frequency Fc, results were oK, but i stuck at calculating the value of gain of Modulator(Gmod) at Crossover frequency.
As per the datasheet TPS54160, the value of Error amplifier transconductance (gm) is 97μMhos, but using this results are not oK.
Also in formula of Gmod it is mentioned as gm(ps), what's the ps means ??? Or do i have to convert the given gm value in different form ??
Part Number:UCC28511
Dear all,
I am designing PFC and two transistor forward converter with UCC28511 controller. PFC works well, but I have problem with forward converter. When I remove MOSFETs, gate signals are present, but when i put MOSFETs back on PCB, there is no any signal on gate of forward converter. I am driving these MOSFETs with pulse transformer and FAN3122 controller. Do you have any idea what am I doing wrong?
Ivan