Part Number: LMZ31506
The temperature derating curve in the data sheet shows only a constant temperature. Is there a derating curve showing changing current with varying temperature at different output voltages? Most manufacturers have this graph, so I'm curious if it can be found for this product.
Thank you.
Part Number: LM5034
Hi Team,
My customer is planning to use our LM5034. They have a couple of questions below:
1. Frequency domain of the low pass filter of the feedback pin? Need frequency response of LM5034 for current sharing. They want to know the frequency response of bode plot “from feedback(Comp1 and 2) to Duty”.
2. Plan to have 5 ACF power stages, group 1 will control by the output 1 of IC, group 2 will be controlled by output 2 of IC
- Can each output support multiple power stages?
- If it can, how can the current sense of each stage be used by the CS input of the LM5034?
Thanks!
Best Regards,
Alfred
Part Number: LM3150
Tool/software: WEBENCH® Design Tools
Hi,
I got a design of the LM3150 with Webench, where the Ron =105 Kohm with package 0805, over the alternate all eligibles. The input voltage max is 24V.
Even the small footprint design option makes the same result.
I am skeptical. According to the datasheet, the RON pin is not a big current flow path. With intuition, 0603 packages would be sufficient, I think.
Is there a stringent reason to use the bigger "0805" package for the Ron?
Thanks,
J.H.Kim
Part Number: BQ24753A
Dear Sir,
The schematic as attached, the charging current sets to 2A, I would like to know how to decide the Idc of L33 and why? thanks.
webber
we are using the above IC for battery made out of 4 cells ( Model: Cell＿A32173128E＿50Ah＿LFP).
could you please let me know what would be the best way to perform chemical ID?
we are thinking of performing data collection as it would be 25 amps cell, and than scaling it to 50 amps for application.
can you please let us know if this is acceptable or recommend something else?
Kind regards
Isaac
Part Number: UCC27524A
HI team,
I have a problem with UCC27524A. My customer used UCC27524A as PFC MOS gate driver. When the server PSU was running, the UCC27524A was damage. The customer tested the damaged IC and found input pin was open to ground. And then the customer captured there is negative input voltage(over -5V) on input pin. The schematic and tested waveform are as below. The negative voltage of input pin indicated in datasheet can reach -5V. So what's the absolute maximum rating stand for (DC or AC)? How long will the IC be damaged after negative input voltage exceeding - 5V?
And one more question, when the customer tested output voltage of UCC27524A, there still has negative voltage（over -2V) in their system. So please help to evaluate the risks.
thanks very much.
best regards,
Sophia Yao
Part Number: BQ40Z80
Hi,
Application has 6s cell structure.
After store for 1 month, 1st and 2nd cell are below 3V but other cells are around 3.5V.
Cells are connected after grading so I don't think it's due to cell difference.
Could you advise for this issue?
Thanks.
Part Number: TPS3828
Dears
WDI is in HIZ when power up, and after 3s, the WDI will became level low, we are wondering how long it will take to make a timeout reset?
in this case, the time out might be a range. like what is the internal reset OSC frequency? and when is the watchdog time start point when WDI from HIZ to a level low.
Thanks
Jun Shen
Part Number: LM5122
Hello support team,
There and any advice on discharge resistor for MOSFET gate to source rules.
1. In LM5122 Sync Boost topology for wheel N-FET, the R8 / R11 are necessary add?
2. In LM3409 non-Sync Buck topology for switch P-FET, the R17 is necessay add?
There are any side-effect or anything benefits? Thanks!
Part Number: ISO5451
hi team
My customer is using ISO5451 in their project and the PWM goes to STO from MCU and then goes to ISO5451. Due to voltage drop over the long distance, sometimes ISO5451 has no signal output. do you have any suggestions to solving the problem?
Best regards
Duoduo cheng
Part Number: TPS23861
Hi TI
Does TPS23861 support manual mode, which can skip the detection of PD devices and directly supply PSE power?
Or is it possible to supply PSE power without detecting the PD device?
Thank you
Jerry
Part Number: TPS92692
Hi team,
Could you support following questions from my customer?
1. My customer connects the /FLT pin to MCU like Fig.34 in the d/s. In the customer case, the MCU starts up before TPS92692, so the 3.3V pullup voltage is applied to /FLT pin before the TPS92692 startup. Is that acceptable?
2. The following sentence is describe in the cal sheet of "TPS92692-Q1 BOOST LED DRIVER COMPONENT CALCULATOR". Could you let me know the meaning of fixed LED string output? Does it mean single LED string? When customer uses single LED string, should customer use type 2 compensation?
-->Integral(type 1) network recommended for multiple LED string configuration
-->Proportional integral(type 2) network recommended for fixed LED string output
Regards,
Yamaguchi
Part Number: UCC27523
Hi,
My customer has following question.
Do you have the measured data of VDD-VOH and VOL at Iout=40mA~50mA?
We're recognizing that it can be calculated from pull up/down resistance.
Best Regards,
Kuramochi
Part Number: TPS63070
Hello
Could TPS63070 support VIn 5V to Vout 5V/2A application? If VIn has 4.75~5.25V tolerance, could output voltage stable on 5V output? Thank you.
BR
Patrick
Part Number: TPS548D22
Hi, Team,
For TPS548D22 OCP latch time, the customer board result is 1.2ms after vout short with SS=4m configuration. Do you have tolerance spec for this?
Best Regrads,
Satoshi Yone
Part Number: TPS92641
Hi team,
My customer is considering to use the TPS92641. Could you support the following question?
Could you let me know how to select the shunt dimming FET? Does a current flow to the shunt dimming FET same as LED current? What specifications does the shunt FET need?
Regards,
Yamaguchi
Part Number: TPS62811-Q1
Hi team,
May I know if TPS62811-Q1 need to add RC snubber from SW pin to GND or not?
If snubber can't be used for this device, to reduce SW node spike of TPS62811-Q1, as I know besides input 0402 MLCC decoupling cap, any ways you think we can propose?
Thanks.
Regards,
Allen
Part Number: TPS92512
Hello
Customer used TI/TPS92512 for LED driver control, Since they need to drive 0.7A current for LED control. Could customer used 250 Hz for PWM frequency design ? Thank you.
BR
Patrick
Part Number: LP8556
Hi Sir,
We can configure the current max register via A1h. But can’t configure the LED current via A0h.
When we config A1h; A0h data will be copied as A1h, is something setting wrong here?
Below is our present setting,
Thanks, Ian.
Part Number: BQ25570
Hello my question is
I set the voltage output is set to 3.3V.My system is a BQ25570 powering a system(MCU) at 3.3V. The system is on the regulated VOUT net of the BQ25570 (on the buck step-down).
But sometimes the built-in Lbuck of bq225570 will have a voltage below 1V.
Sometimes using the meter to measure the voltage and return to normal 3.3V
The following is my circuit diagram TPS62737 is not on the piece
(Please visit the site to view this file)