https://e2e.ti.com/support/power-management-group/power-management/<p style="display:none;">blank</p>en-USTelligent Community 13https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1660302/lm5148-q1-dc--dc-convertor-buck-boost-regulator-selection-assistance/6410728Thu, 09 Jul 2026 09:41:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:6cf6d63e-30a3-421a-90a1-dca71a364728Vaishak BThank you. Also, Could you please suggest a voltage converter for Vin=5v to 5.5v, Vout= 3.3v @Iout= 12 I was going through TPS62873N1QWRXSRQ1 datasheet. But its output voltage can only be set using I2C. Can you suggest me a part which has external resistor based output voltage setting?https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1660981/tps25751-tps25751-stuck-in-ptch-mode-cannot-access-bq25798-via-i2c/6410727Thu, 09 Jul 2026 09:41:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:ba2e8286-b6b4-4e50-bff4-711615fbd89dZhao LJHi Katilynn, I&#39;m running into an issue with the PBM process on my TPS25751D. The acFailCode returned is 0x01 (AC_FAIL_WRONG_HEADER_VERSION), which seems to mean the header version (0xB6) from the USBCPD tool&#39;s generated firmware is not recognized by the chip. I&#39;m using TPS25751D and the tool is configured for TPS25751. I&#39;ve attached my driver and configuration files. dmesg info: [ 3.273007] tps25751 4-0021: initial mode=PTCH (mb=&#39;PTCH&#39;) [ 3.273042] tps25751 4-0021: Direct firmware load for tps25751/patch.bin failed with error -2 [ 3.273050] tps25751 4-0021: Using built-in patch firmware (14272 bytes) [ 3.273056] tps25751 4-0021: tps25751: PBM load 14272 bytes... [ 3.273645] tps25751 4-0021: tps25751: PTCH confirmed [ 3.273651] tps25751 4-0021: tps25751: PBMs: lowerSize=14272 burstLen=14272 [ 3.572887] tps25751 4-0021: tps25751: PBMs OK ? starting burst [ 3.572895] tps25751 4-0021: tps25751: burst: target=0x30 len=14272 chunk=32 [ 3.943622] tps25751 4-0021: tps25751: burst done: 14272 bytes [ 4.244917] tps25751 4-0021: tps25751: PBMc: stdTask=0 devPatch=0x00 bundleGood=50 cfgGood=3 acFail=0x01 hdrVer=0xB6 full[0:31]=000000003032f607e297c9434d2d88ad7dc2d0112f836a40000301b62a4b0000 [ 4.244928] tps25751 4-0021: tps25751: PBMc fail: stdTask=0x00 devPatch=0x00 bundleGood=50 cfgGood=3 acFail=0x01 [ 4.244935] tps25751 4-0021: PBM failed: Apply non-zero [ 4.244940] tps25751 4-0021: PBM failed [ 4.244964] tps25751 4-0021: BQ25798 charger configured but TPS25751 not in APP mode ? skip [ 4.244992] tps25751 4-0021: TPS25751 ready (mode=2, charger=no) [ 4.245035] tps25751: loaded (TPS25751 + BQ25798) ...... Could you please take a look and help identify the cause? Thanks! e2e.ti.com/.../TPS25751D.ziphttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1650119/tps2640-tps26400pwpr---auto-retry-mode-validation/6410725Thu, 09 Jul 2026 09:36:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:bcf0e784-7288-46ad-a67a-e75903687624Bandaru HemanthHi, then it is a single point failure, device will shut down much early, if no resistance means it is a high impedance node for small current it charges higher voltage so device will cross internal ILIM reference then it hits TSD, device will shut down. you said device is not hitting TSD, but in the above graph vout is going low. thanks, Hemanth.https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1662740/tlc5957-inquiry-regarding-figure-14-in-data-sheet-slvuaf0Thu, 09 Jul 2026 09:36:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a1f0b151-80dd-4254-accc-f1a779910ba4TI-CSCPart Number: TLC5957 Hello E2E Experts, I am writing to you regarding a point of concern I found while reviewing the data sheet for your product (SLVUAF0). My understanding is that Figure 14 on page 19 describes the transmission of the LATGS command in Poker Mode. However, I noticed that while the LAT signal is High, only one SCLK pulse is sent, whereas the LATGS command requires three pulses. It appears to me that this figure may actually be illustrating the WRTGS command , which seems to be identical to the content shown in Figure 13. Could you please verify if there is an error in the documentation? I would appreciate it if you could clarify this point. Regards, TICSCTLC5957Test &amp; Measurementhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1662733/lmr33630-presence-of-output-even-though-en-pin-pulled-lowThu, 09 Jul 2026 09:29:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:56bd25b9-af72-4189-982e-d0d302580097Gaurang MevadaPart Number: LMR33630 Hi, We are using LMR33630 to generate regulated output ranging from 4V to 6V approx. The output is varried using digipot connected on feedback path. The EN pin is controlled by 3.3V TTL logic. We are observing that even though the EN pin is pulled low (0.2V approx) the output remains around 2V. We tried loading the output with 100Ohms, the output slightly goes down around 1.2V. When we give 3.3V on EN pin the output stays to the desired output voltage i.e. anything between 4 to 6V as per Digipot setting. What are the potential reasons and how can we resolve it, please suggest. Note: SW_EN_3V3 (D16) is 3.3V signal that turns ON the switching regulator. SW_DISABLED (D17) is 1.8V signal that turns OFF the switching regulator irrespective of status of SW_EN_3V3 (D16). Thank you Kind regards GaurangLMR33630Medical &amp; healthcarehttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1661070/lm74910-q1-circuit-review-and-pcb-layout-review/6410711Thu, 09 Jul 2026 09:28:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1b667d8d-0234-4556-9ba2-f40b82660917Shiven DhirYes, rest is okay. Regards, Shiven Dhirhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1662401/lm7480-q1-tvs-on-output-side/6410707Thu, 09 Jul 2026 09:26:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:7649f7e7-fbe4-43e3-b194-1bce8e538e47Shiven DhirHi Roy, As far as the diode can clamp at -0.3V at 8A transient current, diode is okay. This diode not seem to achieve that. Regards, Shiven Dhirhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1650119/tps2640-tps26400pwpr---auto-retry-mode-validation/6410703Thu, 09 Jul 2026 09:23:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:24207a5e-bb33-4106-887e-aa582bbb5e95devaraju huHi Hemanth, Yes, FLT signal will goes low once it triggers the Overload. what will happen if the Rlim resistor is not present? Thanks Devahttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1662688/ucc28750evm-071-ucc28750evm-071-design-files/6410701Thu, 09 Jul 2026 09:22:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:9711329d-b349-4c4a-a81d-d63d5242c9adAnsh SharmaThank you, UCC28750 was selected for cost benefit. You can feel free to recommend other designs. I also have a follow up question from systems engineering perspective: e2e.ti.com/.../ucc28810-request-for-designs-similar-to-tida-010951https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1654141/tps25772-q1-master-pd-port-shutdown-on-dual-power-delivery-2x20w/6410700Thu, 09 Jul 2026 09:21:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:56f08dcf-755d-4dd8-b835-b19b0a91e73bsamuel haristoyHello, It does not looks like the PD traffic changed after i uploaded the new config. The PD logs i shared were an example with a device that was able to sink only 15W max. here is a example of a device sinking 20W. I&#39;ve modiied some parameters on UVP OCP ILIM and it seems to work better : Here is the PD negociation for 20W 9V@2.22A : As you can see in the logs the host advertise it can deliver 20W, and the device is asking for 20W. When the voltage shuts down its because I disconnected the Plug, not because it fails. Both ports are working fine. Ask me if you need other details. Regards, Samuelhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1660263/lm51772-lm51772-does-not-produce-the-expected-output/6410699Thu, 09 Jul 2026 09:21:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0c4239b2-b232-45e5-bd9f-8d62a94dac91Steen HansenHi Hassan What if it, due to noise enters hickup mode? I have looked at the solderings countless times and found nothing. I have changed componet values to meet the values from the calculator. I have reworked the schematic &amp; layout, based on the inputs from you, but I am not happy to go with a new layout before I know it will work. If I send you the updated schematic and layout, will you do a review? Br. Steenhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1661070/lm74910-q1-circuit-review-and-pcb-layout-review/6410696Thu, 09 Jul 2026 09:16:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:f3e6271a-27ed-458d-9789-1f3259a36a74YZ XBeside RSENSE this point, others circuit is ok or not? thankshttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1662688/ucc28750evm-071-ucc28750evm-071-design-files/6410691Thu, 09 Jul 2026 09:12:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d54fbf04-81b3-4eab-a2ab-9898e2c466e8Shailesh DubeyHi Ansh, Thank you for your interest in TI products. The UCC28750x in itself does not have any PFC capabilities. Even the EVM that you are referring to, features a rectifier and a large bulk capacitor on the rectified line that feeds the Flyback converter. If a PFC function is desired, you would need to have a dedicated PFC front end based on UCC28056 with the 400V DC link feeding the flyback converter based on UCC28750x. Such an EVM is currently under development and may be released in the coming few weeks although the power ratings might not be an exact match. Thank you. Regards, Shaileshhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1662725/tps5430-ena-pin-capacitor-and-soft-start-extensionThu, 09 Jul 2026 09:09:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:6b535e87-dd4f-48e4-abab-0a00191ba6b8Maia YamakawaPart Number: TPS5430 Other Parts Discussed in Thread: LMR14030 Hi team, The TPS5430 datasheet states that a resistor should not be connected between ENA and GND. Our customer is considering adding a capacitor between ENA and GND to achieve a longer soft-start. My understanding is that this mainly delays startup rather than extends the soft-start ramp time. Is this correct? If so, we are planning to recommend the LMR14030, which has an adjustable soft-start. Are there any other TI devices you would recommend? Thank you in advance.LMR14030TPS5430https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1660977/tps565208-abnormal-voltage-fluctuations-on-the-vfb-en-and-vin-pins-during-power-up-of-the-tps565208/6410680Thu, 09 Jul 2026 09:06:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:b1633673-67f3-4550-a8b3-d1df97a0e061Alla UshasriHi Ryker, Schematic and layout seem fine without 470uF electrolytic cap, as the issue still persists without electrolytic cap: 1. Can you confirm whether they are testing using spring probe as this seems noise from somewhere? 2. Can I know, have they started seeing issue with IC recently which is already in production? Regards, Usha.https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1662028/tps54260-overtemperature-shutdown-on-tps54260/6410669Thu, 09 Jul 2026 08:57:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a6c770af-1559-498a-8ac7-43c87656e954Sourish NandyHello Andrew, Can you check what will be the ambient temperature? As without that information, it is hard to determine the junction temperature. I checked the IC power dissipation under your operating condition on WEBENCH, and it came out to be ~260mW. Temperature rise per watt we can take from the datasheet for standard JEDEC board for now, which is 62.5C/W Considering the two values, we can say the junction temperature should be T_ambient + 16.25C. So, the Junction temperature depends largely on the T_ambient too. Also, one more issue is the Temperature rise per watt we used is under standard temperature and pressure. The number will vary for Vacuum, so it won&#39;t give a very good idea of what the temperature rise will be in space. I will talk with the product engineer about how to get the same specification for space, meanwhile you can try to obtain the ambient temperature range. Regards, Sourish.https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1661515/bq25713evm-017-battery-not-properly-charged-only-5ma-taken-from-input-source-what-happened/6410666Thu, 09 Jul 2026 08:55:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:38d95923-cfcc-4d0b-a725-323402fb2fd2Manu mohan M SHello, Thank you for your reply. I configured the BQ25713 using a Seeed Studio XIAO microcontroller over the I&#178;C interface. Using my firmware, I write the Charge Current Register (0x02) and Charge Voltage Register (0x04) after power-up. After these registers are written, charging starts normally and the battery charges as expected. However, I observed the following behavior: The register values are written only while the microcontroller is connected and running. If I disconnect the Seeed XIAO or power-cycle the charger board, the charger no longer charges the battery. The input remains at approximately 5 V with only 0.004 A input current, indicating that charging is no longer active. It appears that the Charge Current and Charge Voltage registers return to their default values after reset, so charging is disabled until my firmware writes them again. My questions are: Is this the expected behavior of the BQ25713? Are the Charge Current (0x02) and Charge Voltage (0x04) registers volatile and required to be programmed after every power-up? Is there any non-volatile memory or hardware configuration that allows these values to be retained after a reset? Besides registers 0x02 and 0x04, are there any additional registers that must be configured to enable autonomous charging after power-up? Thank you for your support.https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1662386/lm5017-vfb-reference-in-design-tool/6410663Thu, 09 Jul 2026 08:52:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:55f2e304-a702-4add-9b0a-788d942f6bebARPITA NATHHi Kyle To be more accurate, you can use typ. value. Yes, however the calculator considers the max value. For 10V output, typical ref gives 7.16kohms; max ref gives 6.98kohms. However, we have chosen nearest standard value 6.98kohm I believe. Practically it makes only ~2% difference. Do you see any major issue with it?https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1657668/lm25145-lm25145-emi-issue--gate-charge/6410660Thu, 09 Jul 2026 08:51:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:3eae3ca3-ac7b-4de3-a9af-4620b25df8f0Or BinyaminHey Onkar, Any follow-up reply? also what is the max and min limitation of the LM25145 adaptive dead? is 14nS the max? can you explain the working principle of this dead time mechanism?https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1662305/tps53676evm-084-tps-53676-evm-accessories-needed/6410657Thu, 09 Jul 2026 08:49:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e01198c5-7ddc-46d2-8598-b9daf21be8dascott huanggot it. thanks