https://e2echina.ti.com/support/power-management/zh-CNTelligent Community 13https://e2echina.ti.com/support/power-management/f/power-management-forum/1094081/bq25756-bq25756/3938705Sat, 12 Sep 2026 05:05:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:c78adb89-75cc-48a3-a81e-3bc20b7e241aTI CHEN期待https://e2echina.ti.com/support/power-management/f/power-management-forum/1094096/lm5171-lm5171/3937925Fri, 11 Sep 2026 08:33:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:669b7b30-b147-4fb1-a730-179d28e4863cFRANK1感谢您对TI产品的关注！ 关于你的咨询，我们正在确认您的问题，感谢您的耐心等待。https://e2echina.ti.com/support/power-management/f/power-management-forum/1094096/lm5171-lm5171Fri, 11 Sep 2026 08:22:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:0b699174-d166-4b75-8285-7248ccd93099Yanyan LiPart Number: LM5171 SCH_5171_2026-09-11.pdf 我想要设计一个单相双向BUCK-BOOST，就是HV输入48V，LV输出12V，LV输入12V，HV输出48V，我做的是毕设不需要这么大的电流，2~5A就可以了，麻烦请帮我审查一下原理图，还有就是关于RLCOMP的公式我不太理解，我用官方给出的6.1K带入进去得不到26.7K，RHCOMP我也计算不出来，不知道如何选型PC 和笔记本电脑LM5171https://e2echina.ti.com/support/power-management/f/power-management-forum/1093838/tps54821-tps54821/3937923Fri, 11 Sep 2026 08:20:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:374a5e23-4e4a-4b7c-a5a5-faf2fd08ef7cVivian Gao芯片是 VQFN (RHL) 封装，有可能是Exposed Thermal Pad没有焊好。https://e2echina.ti.com/support/power-management/f/power-management-forum/1093837/lm5190-can-lm5190-be-used-with-a-130v-input/3937922Fri, 11 Sep 2026 08:12:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:d622a967-1c0e-4f9c-9675-e3a4c68e38c2Vivian GaoThe VCC regulator switches over to use BIAS voltage as the input when rising across 9V (typical)... When using BIAS as the supply, VIN voltage must be greater than VCC voltage during all conditions to avoid damage to the controllerhttps://e2echina.ti.com/support/power-management/f/power-management-forum/1094090/ucc28780-ucc28780-debugging-issues/3937920Fri, 11 Sep 2026 08:00:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:9af2d80c-6236-453b-9287-29da91f8b77bVivian GaoThank you for your attention to TI products. We are verifying your issue, please wait for our reply.https://e2echina.ti.com/support/power-management/f/power-management-forum/1093456/tps25762-q1-tps25762dqrqlrq1-tps25762cqrqlrq1/3937917Fri, 11 Sep 2026 07:45:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:85e2fb23-c6b6-4462-bf8a-6e0ea5a9a8dcEirwenbin 文件需要更新。你可以通过 GUI 重建，并且需要使用基础固件 https://dev.ti.com/gallery/view/USBPD/TPS257xx-Q1-GUI/ https://www.ti.com/drr/opn/TPS25772-Q1-DESIGN RTVSP 配置设置页有区别。https://e2echina.ti.com/support/power-management/f/power-management-forum/1093646/tps51200-vtt-vrefca/3937914Fri, 11 Sep 2026 07:40:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:6ffb5983-6f8f-4945-86c9-0f8a54ce53bbqin wang改成先上电的2.5V之后，发现VTT和VREFCA上电时有回沟，EN改成晚给之后，VTT回沟消失，但是VREFCA回沟还是存在https://e2echina.ti.com/support/power-management/f/power-management-forum/1094090/ucc28780-ucc28780-debugging-issuesFri, 11 Sep 2026 06:55:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:2f1d4cd5-95bb-4e29-b760-667d9d67b220Gabriel Wang1Part Number: UCC28780 Dear Expert The attached files show the VSW and PWML waveforms measured under a 115Vac input condition. An abnormal waveform is observed: after VSW drops to 0V, it rises again. This phenomenon is particularly evident under the 10A output condition; no such issue has been observed in the 5A to 9A range; similar waveforms are also present below 5A, but VSW does not drop to 0V in these cases. Similar abnormal waveforms also appear when the input is 270Vac high voltage Transformer parameters: turns ratio 23:1:3, excitation inductance Lm=200uH, leakage inductance Lr=9uH, switching frequency 100kHz, with sandwich winding method. I'd like to ask, from which directions can this abnormal waveform be investigated and improved? I have attempted to modify the parameters of the RDM, RTZ, and BUR pins as well as the transformer's parameters and winding method, but there has been no improvement. Schmetic SCH (2).pdfUCC28780https://e2echina.ti.com/support/power-management/f/power-management-forum/1094084/lmr33630addaevm-lmr33630addar-5v--5v/3937911Fri, 11 Sep 2026 06:53:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:9e84b4de-d866-4e91-af65-5dda17c574f0user6128151PCB设计是这样的https://e2echina.ti.com/support/power-management/f/power-management-forum/1094087/bq25756/3937907Fri, 11 Sep 2026 06:42:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:075f0e82-3439-49e2-9456-473057650b54Alice您好， 已经收到了您的案例，调查需要些时间，感谢您的耐心等待。https://e2echina.ti.com/support/power-management/f/power-management-forum/1094085/lsf0102-q1-lsf0102qdcurq1-can-this-model-achieve-3-3v-to-3-3v-level-conversion-thereby-serving-as-an-isolator/3937906Fri, 11 Sep 2026 06:41:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:a9622cf4-ee4c-492e-b398-718cbdea75fdAlice您好， 已经收到了您的案例，调查需要些时间，感谢您的耐心等待。https://e2echina.ti.com/support/power-management/f/power-management-forum/1094084/lmr33630addaevm-lmr33630addar-5v--5v/3937903Fri, 11 Sep 2026 06:38:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:95d7fe3d-3e6f-49a7-bf8d-3f7bf28f1d0eDaniel您好 已经收到了您的案例，调查需要些时间，感谢您的耐心等待https://e2echina.ti.com/support/power-management/f/power-management-forum/1094089/ucc28c54-8-1-flyback/3937902Fri, 11 Sep 2026 06:37:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:d4f76d40-22ef-4660-a892-f3526bc6da0aDaniel您好 已经收到了您的案例，调查需要些时间，感谢您的耐心等待https://e2echina.ti.com/support/power-management/f/power-management-forum/1094089/ucc28c54-8-1-flybackFri, 11 Sep 2026 06:33:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:61c73857-d05f-42a6-9d9c-6972a5744881zhao zhaoyizePart Number: UCC28C54 正如标题所示，该应用中COMP引脚似乎并未进行软启动设置，应如何配置软启动电路。UCC28C54https://e2echina.ti.com/support/power-management/f/power-management-forum/1094087/bq25756Fri, 11 Sep 2026 06:31:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:1bcef3c3-558d-46ed-aa25-643cb969513cchao maPart Number: BQ25756 您好！我司准备进行一个电源方案，具体细节：充电芯片是BQ25756,输入端为氢燃料电池输入15v，输出端为两个电池组，一个BATA一个BATB，交替为两个电池组进行充电，同时呢，电池的负载端为两轮车电机，两组电池轮流给电机供电，当给BATA充电的时候，由BATB为电机负载供电，当给BATB充电的时候，由BATA为电机负载供电,同时，我的供电部分也是由两组电池交替供电，下图四组背靠背MOS我计划使用四组 LM74502HQDDFRQ1芯片进行控制通断，请您帮我看一下这个方案是否可行，我也可以将完整的原理图发给您评审。谢谢！BQ25756混合动力、电动和动力总成系统https://e2echina.ti.com/support/power-management/f/power-management-forum/1094085/lsf0102-q1-lsf0102qdcurq1-can-this-model-achieve-3-3v-to-3-3v-level-conversion-thereby-serving-as-an-isolatorFri, 11 Sep 2026 06:20:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:3bff2a16-e5c1-4851-bfef-2782426bcb70ZIYANG ZHAOPart Number: LSF0102-Q1 LSF0102QDCURQ1 Can this model achieve 3.3V to 3.3V level conversion, thereby serving as an isolator?电器LSF0102-Q1https://e2echina.ti.com/support/power-management/f/power-management-forum/1094084/lmr33630addaevm-lmr33630addar-5v--5vFri, 11 Sep 2026 06:14:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:ada3c55d-6989-4ce4-ba2a-d34277f7bd4auser6128151Part Number: LMR33630ADDAEVM 在TI的推荐设计里找到的+5V转-5V电压采用LMR33630ADDAR进行的，参考的电路 设计完成后，给电路加了5.2V电压，消耗电流大约100多mA,但是输出是+200多mV，不知道哪里设计有问题。请TI的工程师帮忙分析下，不胜感激！LMR33630ADDAEVM工业自动化https://e2echina.ti.com/support/power-management/f/power-management-forum/1094081/bq25756-bq25756/3937899Fri, 11 Sep 2026 05:56:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:b86f36ac-6c14-4df4-bb1d-e8b42555c7a8Vivian Gao感谢您关注TI产品。我们正在核实您的问题，请耐心等待我们的回复。https://e2echina.ti.com/support/power-management/f/power-management-forum/1093648/ucc21520-q1-ina-inb-pwm-vssa-6v-5-5v/3937894Fri, 11 Sep 2026 05:16:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:ae5d46a2-c183-435e-bce1-61dce2ade7adAlice您好， 如果您不想使用芯片的隔离功能，那么VDDA是从 VCC_10V去电，那么VSSA就应该连接VCC_10V的GND.