Part Number: TPS61178
Hi support team,
Do you have any formulas for calculating output ripple voltage for TPS61178?
How can we estimate the ripple voltage of TPS61178 at PFM mode?
Thanking you in advance,
Hirokazu Takahashi
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TPS61178: Estimation of Ripple voltage
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TPS61169: Driving the LCD Backlight with 23V, 100mA
Part Number: TPS61169
Hi Team,
We are planning to use the Display with the Back-light Specification of 23V, 100mA in our design.
Please provide the details TPS61169 Driver supports our application or not.
Any thermal related issue comes in this design?
Thanks & Regards
Muneeswaran R
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LM2578A: Inverting Regulator Configuration
Part Number: LM2578A
Hello,
Just confirming -- on page 9, figure 34, is "TIP32" the part number of Q1?
Thank you!
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LM5023: LM5023 PFC solution
Part Number: LM5023
Hi
I have an AC/DC solution in evaluating TI
The spec information are as follows, can provide suggestions?
I have seen the LM5023.
http://www.ti.com/tool/PMP7883
and also
http://www.ti.com/tool/PMP8655, is this solution to change the transformer? if change the transformer can give me transformer parameter information?
and I also study UCC28600, UCC28710
VIN: 90-300VAC
VOUT: 24V / 2.5A
PF> 0.8
THD <30%~15% (depending on load)
PCB size can't too big
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TPS62240： TPS62240 is the current consumption of Vin
Part Number: TPS62240
Hi，
TPS62240 specification shows that when Vin<2V, the IC will enter the undervoltage lockout mode, then the IC is still working, what is the current consumption at this time, thank you
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TPS61165: LCD Backlight going from 8V to 4V after 5-10 second bootup.
Part Number: TPS61165
All our CCA that uses this circuitry to drive a LCD Backlight and are working fine except a few.
The issue we have is the output is adequate for the Backlight to work but after 5-10 second after boot up the output voltage drops.
Short from replacing the TPS61165 we have investigated the whole circuitry for faulty parts, shorts, bad soldering, you name it.
After reviewing the Forums i haven't found any issues similar to mine.
Anyone may possibly have an theory?
What could possibly cause the Driver to drop its output from 8V to 4V with an input of 5V?
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TPS65265: Input Filter Requirement
Part Number: TPS65265
Hi,
I have using this regulator for Intel Platforms for the output (2.6V, 0.65A),(1.8V, 1.21A),(1.0V, 1.86A). Please help me whether we need Input Filter for this design, If yes is there any reference schematics available, in datasheet the information not listed. Also, is this part suitable or any other recommendation for alternate part.
Thanks
Vikas G.
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TPS54824: Control V_out and I_out lower with SS/TRK pin
Part Number: TPS54824
Hello,
We're looking to use the TPS54824 to power a sensor. In some cases we would like to lower the voltage & current to the sensor if it is getting too hot.
We noticed the SS/TRK pin on the device:
- Can this pin be used during normal operation of the IC to lower Vout / Iout?
- Or can this pin only used during start-up sequence?
Thank you, Keith
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TPS24750: Higher than expected Rds(on)
Part Number: TPS24750
I have a customer currently evaluating the TPS24750. With a 1.5A load, they are measuring a drain-source drop of 30mV, which suggests a Rds(on) significantly higher than the value listed in the datasheet.
Here's a schematic snippet:
VCC = 3.3V, 12A current limit, Rsense = 3mOhm, Rimon = 1.27kOhm, Rset = 56.2
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BQ25120A: I2C does not ACK without VIN present on evaluation board
Part Number: BQ25120A
Greetings,
We're working with the BQ2520AEVM (Evaluation Board) interfaced with the EV2400 and Battery Management Studio v1.3.86. It is attached to both a 4.2V LiPo battery (VBat) and a power supply (VIn). We also attached a simulated load to the VSys. We noticed a couple issues.
1.) If there is no load present on VSys and VIn is removed, VSys goes from 1.8V to 3.0V. What is the minimum load for a stable output on VSys? Is there a minimum load on VLDO as well?
2.) During our testing we found that the Battery Management Studio only reports "Device ACK OK" when the charging voltage is present on VIN. Looking at the schematics, the I2C lines should be pulled up to VSys, not VIn. Does the I2C communications require VIN? Could it be a limitation of the EV2400 I2C interface?
Thanks!
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TPS549A20: I2C Tfall time
Part Number: TPS549A20
Hello E2E,
Is there a minimum fall time for the I2C lines of the TPS549A20? I am assuming no but just want to check.
Thanks!
Russell
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TPS2546: Is there any solution for testing TPS2546?
Part Number: TPS2546
hello
we want to test TPS2546 whether it is in normal status such as it can support IPAD charging SPEC.
How should we set the test method to verify that TPS2546 can support IPAD charging SPEC when our PCBA is manufactured?
Thanks
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LMZ31520: Adjusting Output Voltage with LM10010
Part Number: LMZ31520
Hello,
I want 2.5V~3.5V @ 12A with Adjusting Voltage power.
AGND pin description of LMZ31520 is 'Do not connect AGND to PGND'.
But snva709 Document is AGND pin connected GND.
What should I do?
I refer to this :
Best Regards,
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LT1054: LT1054 Oscillator frequency Controller
Part Number: LT1054
Excuse me
LT1054 Oscillator frequency How to precisely control only operates above 25KHZ, except for external CLK.
I need, please suggest more Switched-Capacitor Voltage Converters IC
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TPS25221: Asking for the recommendation on fault pin floating
Part Number: TPS25221
Hi Team,
Customer is looking for TPS25221 fault pin floating.
If customer is floating fault pin ,IC will be clamp current to current limit setting when OCP occurred ,right?
BR,
SHH
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TPS65131: TPS65131 Question about output voltage Ripple.
Part Number: TPS65131
Dear support member,
My customer used TPS65131.
I have a question.
（Question)
Only the negative side is used without using the positive side.
There is 1Vp-p noise on the minus 5V output.
Is there a solution?
A circuit diagram and waveform are attached.
(Please visit the site to view this file)
Best regard.
Bob Lee.
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TPS61089: Leak current of the body diode at disable
Part Number: TPS61089
Dear all.
How much does the leak current of the body diode when TPS61089 is disabled?
(In=5V, Out=9V, load=LED)
Regards,
PAN-M
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CCS/BQ20Z95: Burning and command
Part Number: BQ20Z95
Tool/software: Code Composer Studio
Hello, I have a few questions about BQ20Z95
1, PFstatus permanently fails, the battery returns to normal state, battery status is still alarm state, tried *41reset, *62PFkey, or can not clear the fault of PFstatus.
2, the board protection function is normal, but why can't it be automatically restored after protection, but also send a command to force open?
3. What command is sent to enter ROM MODE for program export.
Thank you!
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LM5026: The application scenarios are high-speed trains or subways with 200w power supply, input dc voltage 16.8-31.2v（normal 24V), output 24V, constant voltage output.
Part Number: LM5026
Dear Sir：
The application scenarios are high-speed trains or subways with 200w power supply, input dc voltage 16.8-31.2v（normal 24V), output 24V, constant voltage output.
The customer has choosed LM5026 to design forward flyback with ACF.
Can you supply the reference design for us?
Thank you very much.
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TLV62085: Why the TLV62085 PG Pin will Go to Low when I heat the TLV62085 about 70 degree by hair dryer.
Part Number: TLV62085
The PG pin pull up to the 3.3V_ASIC by 1M ohm resistor then connector to the other TLV62085's enable pin. When the temp is lower about 70 degree it is work,
When The temp higher over 70 degree the PG pin's voltage only has 0.9V. (3.3*400k/1400k.) It's 3.3V_ASIC output is still correct 3.3V but PG signal could not push the the next power IC.
I need to reduce the 1M ohm to 10k or 100k that it can work normally.
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