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/1648620/tps25763-q1-tps25763-pd-charing-issue-for-65w-pc/6356843Sat, 23 May 2026 14:56:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a72909eb-e604-43e6-acda-0db3eef0d03cFrank QiAttached TPS257XXGUI setting for your review. e2e.ti.com/.../TPS257XXGUI_2D00_Setting.pdfhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648726/tps65994ad-device-details-of-tps65994bhSat, 23 May 2026 14:28:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:dc46b9a0-f926-4775-a5d3-f083c5cc92f6Ketan MehtaPart Number: TPS65994AD Other Parts Discussed in Thread: TPS65994BH Hello, we are developing a new design using the TPS65994A, but it is NRND. The recommended alternative is the TPS65994BH, the details of which are publicly unavailable. Accessing these details requires signing an NDA. We would appreciate guidance on how to establish the NDA. If you could provide a contact person, such as an FAE or someone who can assist, that would be very helpful.TPS65994ADTPS65994BHhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648629/pmp23224-pmp23224/6356839Sat, 23 May 2026 14:12:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:8b261a36-24be-4698-ae08-8634c7d90246Santhibhushan AAnd I have attached some of the waveform observed and measured at different locations are also attached. e2e.ti.com/.../BC_5F00_-WORKING-MOD_5F00_23_5F00_5_5F00_26.rarhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1644725/lm5069-lm5069-burns-when-enabled/6356838Sat, 23 May 2026 13:59:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:95d582ac-c42b-4714-9594-a2416c282204Mani RayHello Dan, LM5069 is capable of power up into short. In your design, Can you please check the VIN, OUT, GATE, Timer pins of the controller during power up into short. I am thinking that OUT is going more negative than -0.3V which is causing to fail the controller. Have you change any component on the Eval board before performing power up into short? Best Regards, Mani.https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648722/bq25798-effect-of-not-setting-ship-fet-present-when-there-is-a-ship-fetSat, 23 May 2026 13:06:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:72f3511a-6012-4b7d-9723-9a796a42e9d0Chuck JenkinsPart Number: BQ25798 We recently discovered that the REG14.7 was not set (Chip FET Present?) yet we have a ship FET installed in the hardware. The Shutdown Mode and Ship Mode fail to function unless REG14.7 is set. What other things may be incorrectly functioning if this bit is not set and there is a ship FET present?Industrial AutomationBQ25798https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648721/bq25798-incorrect-bit-labels-in-section-9-3-12-of-rev-b-data-sheetSat, 23 May 2026 13:01:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e71dc163-0314-4488-8993-a39b6dbc0ae2Chuck JenkinsPart Number: BQ25798 Other Parts Discussed in Thread: BQSTUDIO The bit reference to the SDRV_CTRL section of Register 11 is called out as &quot;SDRV_CTRL[1:0]&quot; but the actual bits in this register are 2:1. Shouldn&#39;t the call out be &quot;SDRV_CTRL[2:1]&quot; for Ship FET control? I understand that the 1:0 is meant to call out the two bits assigned to the Ship FET function but 2:1 also calls out the two bit function and does not confuse that actual bit assignment. Try setting 11 to bits 1:0. You get quite a different response! Bit 0 controls the delay. Seems to make more sense in the text if you call out the real bits as identified in BQstudio when hovering over table registers.Industrial AutomationbqStudioBQ25798https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648720/bq25630-sys-voltage-dropSat, 23 May 2026 12:09:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:f5cf8691-a161-4643-8c21-4019bf46c4c8Jimmi HansenPart Number: BQ25630 Hi We are using the BQ25630 in our product and have an issueu woth SYS voltage drop when inserting the battery. Please see attached file. We are looking forward to your reply. Thank you Best regards Jim BQ25360 SYS Drop.pdfBQ25630Datacom modulehttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648679/lm51772-with-the-load-the-input-mosfet-showing-short-between-source-and-drain-for-a-buck-boost-dc-dc-with-15v-53v-input-and-19-5v-8a-output/6356830Sat, 23 May 2026 11:23:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:6588e046-0e2d-4f1d-9f34-62f31b57efdcStefan SchauerHi Mohsin, In an initial review of your schematic I have seen that the MOSFET on the BUCK side are not logic level - can be seen with the Miller Plateau of around 5.5V. This MOSFET will not go in full conduction mode and will then have very high losses which could lead to thermal overstress. You should see this with a thermo image and a high increase of the temperature at this MSOFETs. I suggest to first replace this MOSFETs with logic level MOSFETs first and then continue with further debugging. Best regards, Stefanhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648678/lm51770-bias-pin-connections-in-higher-vin-designs/6356829Sat, 23 May 2026 11:18:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:09c3b5d7-94e4-49ca-93cd-e379636a63b2Stefan SchauerHi Tom, please do not apply higher voltage on BIAS or any other pin then specified in the abs max ratings of the datasheet. So if no other supply is available use the disable function of the BIAS pin and connect it to GND. Please keep in mind that you can get quite some losses inside the LM51770 due to the high input voltages (losses in the internal LDO). So check if you can accept and handle that - if not you might need to consider another supply option for the BIAS pin (e.g. a secondary small BUCK ). Best regards, Stefanhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648719/tps55289-tps55289-schematic-and-compensation-checkSat, 23 May 2026 11:17:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:29bc0c94-0fac-4509-b244-4b514b52fc60Jeremy CurtisPart Number: TPS55289 I am using two TPS55289 as independnt supplies for 2 x USB-PD ports. The input voltage will be 14V or 28V, so the solution needs to work for both. Output is up to 45W per port. So outputs are: 5V, 9V, 15V @ 3A 20V @ 2.25A Plus PPS is supported, so anything from 5V to 20V I have a prototype which looks to be working well at all input and output voltages, themal performance looks great too. However, I do get a very faint whine from the converters which I think is from the input caps rather than inductor. So I&#39;d like to check the compensation network is OK. I run them in FPWM mode. The 10uF input/output caps are TDK CGA5L1X7R1H106K160AC, with a bulk 100uF Panasonic EEH-ZK1V101XP on the output after the sense resistor. The emi filter which sits between the two TPS55289 and the input also has a 100uF Panasonic EEH-ZK1V101XP cap with a tiny series resitor to dampen the EMI filter. The PCB layout has the TPS55289 on the bottom of the PCB, but the inductor on top for space constraints. The bottom of the PCB has a thermal pad coupling it to the enclosure to use it as a heatsink. The PCB is 1.2mm thick, 6 layers: signal, gnd, signals, gnd (inc AGND), gnd, signals.TPS55289https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648718/lm70880-lm70880-output-issueSat, 23 May 2026 09:55:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:7da5d7cf-7b80-4c4c-9c41-3fcc71770e4aReedPart Number: LM70880 Hi team, LM70880 chip The input is 48V, and the output is 5.2V. The DCR of L1 is 6.5 milliohms. The input capacitance is 370uF (comprising three 100uF aluminum electrolytic capacitors and seven 10uF chip ceramic capacitors), while the output capacitance is 826uF (including one 330uF tantalum capacitor, one 220uF tantalum capacitor, and several chip ceramic capacitors) According to the calculation table and the input-output requirements, the recommended parameters are to change RCOMP to 54.9 ohms, CCOMP to 0.68nF, and leave CHF unsoldered. At this time, the output voltage is stable at 5.2V when there is no load. However, when the load reaches 1A, the output voltage drops to 4.5V; when the load reaches 2A, the output voltage drops to 4V. What is the reason for this? How can this problem be solved? Thank you!LM70880Industrial Automationhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648717/tps26750evm-tps26750evm-board-does-not-detect-a-device-if-its-already-plugged-in-before-powering-up-the-boardSat, 23 May 2026 09:39:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:823b405d-f961-407f-8b66-bac33b5c1e7dAshraf Jahanzeb KhanPart Number: TPS26750EVM Hi! i am configuring TPS26750EVM board to power up a CPU which accepts PD3.1 EPR. When the TPS26750EVM board is powered up and i plug in the USB-C cable in J4 connector, it starts to furnish power to the CPU. But if the CPU is already plugged-in and the TPS26750EVM board is powered off and i turn it on, it doesnot furnish power to the CPU, unless i plug out the USB cable and Plug it in with TPS26750EVM in powered-On state. which means it is not detecting the USB-C port on when the board powers up. How do i resolve this issue.power deliveryTPS26750EVMhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648716/tps26750evm-tps26750evm-board-not-detecting-in-application-customization-toolSat, 23 May 2026 09:33:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:fc1534e5-7de7-429b-a3a0-f8ac834df7e1Ashraf Jahanzeb KhanPart Number: TPS26750EVM Hi! i have two TPS26750EVM boards. I configured one board through ACT and tested it. after a day, i wanted to test some configurations so i connected it again with PC to configure it with ACT but it is not detected by the application. i picked the second board and connected it and it works fine. What could have gone wrong. what can i test? is it a firmware issue? the board doesnot connect with ACT but otherwise the board is working when mobile or laptop is connected with its J4 USB-C port as it worked earlier. please helppower deliveryTPS26750EVMhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648620/tps25763-q1-tps25763-pd-charing-issue-for-65w-pc/6356821Sat, 23 May 2026 08:23:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0d5ccd51-f91e-46cf-b8f7-af73978496edFrank QiHi Chuck, Attached the screen capture from POWER-Z Capture. From the log, seems the device suddenly detached, and attached again. e2e.ti.com/.../POWER_2D00_Z_2D00_ScreenCapture.pdfhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648715/bq76952-cell-deviation-between-actual-cell-voltage-and-measure-cell-voltageSat, 23 May 2026 07:55:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c78171aa-b92b-420e-9720-ac47dbcd397eABHISHEK MUKHERJEEPart Number: BQ76952 Hi, We are designing BMS for 10S, so we are facing a issue of cell deviation in range of 10mv-20mv. In all the 10 cells. But the FMW we have developed for 16S using same AFE BQ76952 is working properly with cell deveiation less tham 4mV. So I have attached the AFE section schematic, please help us to resolve the issue. We have 20 thousands pieces of AFE BQ76952 PO on hold.BQ7695248V in automotivehttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648620/tps25763-q1-tps25763-pd-charing-issue-for-65w-pc/6356817Sat, 23 May 2026 07:40:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c3569237-af91-4a2e-88fe-9177d85931feFrank QiHi Chuck, Thanks for reply. I still can&#39;t upload .json and POWER-Z log file. Is there a way to to disable TPS25763 PD charging (or very low charge current), but still have other functions work well such as USB device (UFP), ALT DP sink, and correct control of USB MUX (TUSB1064). I&#39;m urgent to figure out a workaround to make the USB and ALT-DP work first. Thanks Frankhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648620/tps25763-q1-tps25763-pd-charing-issue-for-65w-pc/6356816Sat, 23 May 2026 07:39:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:4d36ef30-73ae-4ac5-a81a-4c3c73a07526Frank QiHi Chuck, Thanks for reply. I still can&#39;t upload .json and POWER-Z log file. Is there a way to to disable TPS25763 PD charging (or very low charge current), but still have other functions work well such as USB device (UFP), ALT DP sink, and correct control of USB MUX (TUSB1064). I&#39;m urgent to figure out a workaround to make the USB and ALT-DP work first. Thanks Frankhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648562/tusb1044-using-tusb1044-without-pd-controller/6356814Sat, 23 May 2026 07:28:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0f6ef53a-3a27-4215-a46e-ec940840b438Vaindu SheppyHi Vishesh, Please find the block diagram of type-c. Regards, Vainduhttps://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1648500/bq79718b-q1-fail-to-wake-up-bq79718/6356813Sat, 23 May 2026 07:23:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:ad94d71a-6c0c-48bf-81dc-9f10a1a1ce37bing lithanks for your reply, I will answer the questions as following: 1. The issue is always been presented on this device, and after power on again, the LDOIN becomes 6.8V and AVDD recovers to 5V again; 2. The power supply applied between Vbat and GND with 30V and is set to supply 500mA at most. when the device is powered, the value of the current is read 4mA, is it normal? 3. it occurs on one device. 4. the device schematic is attached as following. 5.The waveform of the ping on RX is shown as following. wake ping: shutdown ping: Futhermore, new information is provided as I tested: 1. when there is only RX and GND of the BQ79718 connected, after the shutdown ping, th e pin AVDD is 5V and pin LDOIN is 6.8V. 2. after a shutdown ping is sent, a wake ping is transformed to RX again, while the DVDD is still 0,which means the device is not waken. I wonder why the wake ping failed to wake the device.https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1646022/bq76922-charge-fet-discharge-fet-control/6356812Sat, 23 May 2026 07:13:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:5410954d-bc4b-444d-9e08-d29fdf7c7396Aswanth ReddyHello Michael Bradbourne, Thank you for replying. While testing, I observed that the CP1 capacitor voltage drops from 10V to 1.6V when turning ON the FETs. I also changed the capacitor to 2.2&#181;F, but the issue still remains the same.