电源管理论坛 - 最近的话题

LM5069: LM5069芯片出现自动重启

Peace Li — Fri, 07 Aug 2026 02:53:24 GMT

Part Number: LM5069

LM5069芯片出现自动重启现象，应该如何专业测试，重启原因以及波形和重启次数。

LM2940-N: Aging test shows chip abnormality

Reed — Thu, 06 Aug 2026 16:20:57 GMT

Part Number: LM2940-N

Hi Team,

USE LM2940IMP-15/NOPB. Aging test shows chip abnormality,

An old design used 5 LM2940 chips on one board. Recently, it was found that the defect rate was increasing during aging testing at a temperature of 50 degrees Celsius, and this was more evident in a certain batch of products. Here is the schematic diagram, please help analyze the reason. (The chip is physically burned out, with a defect rate of 0.6%).

LM5012: LM5012DDAR Heat Dissipation pad oxidation and dirty, need check the reason and if it affect performance.

wilson Zhang — Thu, 06 Aug 2026 11:22:54 GMT

Part Number: LM5012

TPS5430: TPS5430输出负压-15V，实测只有-5V

haidong qiu — Thu, 06 Aug 2026 08:02:23 GMT

Part Number: TPS5430

BQ25601: BQ25601 as a slave charger, the reading of the charging current is abnormal

b cc — Thu, 06 Aug 2026 06:06:46 GMT

Part Number: BQ25601

system version: kernel 5.4

master charger:rt9471

slave charger:bq25601

rt9471 is good status.

ibus setted software rt9471 and bq25601 each is 1650mA

ibat setted software rt9471 and bq25601 each is 2750mA

For test result,at charging mode,usb charger adapt is 8.8V 3.0A. Battery is 3.8V 4.8A.

Now,bq25601 register :

bq2560x_dump_register: [REG_0x00]=0x05 [REG_0x01]=0x18 [REG_0x02]=0x2d [REG_0x03]=0x00 [REG_0x04]=0x90 [REG_0x05]=0x00 [REG_0x06]=0x84 [REG_0x07]=0x10 [REG_0x08]=0x00 [REG_0x09]=0x00 [REG_0x0a]=0x00 [REG_0x0b]=0x00

0x0A is 0x00, 0x00 is 0x05 .

These all do not match the actual test results, but I don't know where the problem lies, although charging is now possible.

BQ79616EVM-021: Subject: Request for BQ79616EVM-021 Altium Schematic, PCB Layout, and Source Code

yuanxing zhang — Thu, 06 Aug 2026 05:56:29 GMT

Part Number: BQ79616EVM-021

Dear Support Team,

I am a development engineer from FLOC Company. My TI account email is zyxbellaa@gmail.com.

Our company is currently preparing to develop a BMS (Battery Management System) control board. I have submitted a request to access the Altium schematic, PCB layout, and source code for the BQ79616EVM-021 evaluation module. However, my request was denied. The relevant information and screenshots of my account details are attached for your reference.

Could you please help analyze the reason for the rejection and advise on how I can resolve this issue to gain access to the required design files?

Thank you for your time and assistance. I look forward to your reply.

Best regards,
Flowc (flwc)
FLOC Company
TI Account: zyxbellaa@gmail.com

BQ79616EVM-021: Subject: Request for BQ79616EVM-021 Altium Schematic, PCB Layout, and Source Code

yuanxing zhang — Thu, 06 Aug 2026 05:55:18 GMT

Part Number: BQ79616EVM-021

Dear Support Team,

I am a development engineer from FLOC Company. My TI account email is zyxbellaa@gmail.com.

Could you please help analyze the reason for the rejection and advise on how I can resolve this issue to gain access to the required design files?

Thank you for your time and assistance. I look forward to your reply.

Best regards,
Flowc (flwc)
FLOC Company
TI Account: zyxbellaa@gmail.com

UCC28950: 工作表取消保护

n y — Thu, 06 Aug 2026 01:58:35 GMT

Part Number: UCC28950

ucc28950的 SLUC222.excel 文件中关于电压补偿的计算公式与手册中不符，如何取消工作表保护密码进行更改

UCC28950: 工作表取消保护

n y — Thu, 06 Aug 2026 01:57:18 GMT

Part Number: UCC28950

ucc28950的 SLUC222.excel 文件中关于电压补偿的计算公式与手册中不符，如何取消工作表保护密码进行更改

BQ24610: BQ24610RGER充电终止电流问题

QI LI — Wed, 05 Aug 2026 10:58:54 GMT

Part Number: BQ24610

请问BQ24610RGER可设置的最小充电终止电流（恒压充电时结束充电的触发电流值）是多少，是否可以设置到100mA，我们选型的电池恒流充电电流设置是2A

LM25116: LM25116最大输出电流

YUEZHAO SUN — Wed, 05 Aug 2026 09:18:15 GMT

Part Number: LM25116

现在正在设计一款输入24V，输出12V 20A的同步buck。LM25116最大输出电流标注的20A，那我是否可以理解为此芯片可以搭载运行最大输出电压36V，20A的buck电路呢？

LM25116: LM25116最大输出电流

YUEZHAO SUN — Wed, 05 Aug 2026 09:16:44 GMT

Part Number: LM25116

LM5122: LM5122 12V-48V@2.5A高性能方案

qianqian liu — Wed, 05 Aug 2026 06:52:56 GMT

Part Number: LM5122

您好！

我们正在开发 4 路 PoE 交换机产品，现将升压电路完整设计需求陈列如下，请您帮忙评估 TI LM5122 是否可以满足下述全部设计指标。

一、电路整体设计需求

1. 功率架构

前级采用 Boost 升压电路，输出 48V 母线，后端驱动 4 路 IEEE802.3at PoE+ PSE 通道；单路 PSE 满载 30W，四路同时满载总功率 120W，短时峰值功率 144W。

2. 输入输出规格

标称输入电压：12V DC

输入电压范围：9~16V DC

输出标称电压：48V DC，输出精度 ±2%

额定输出电流：2.5A，峰值输出电流：3A

3. 性能指标

效率：满载≥91%、半载≥93%、轻载≥90%

输出纹波：≤1%

负载特性：PSE 端口插拔、负载快速跳变时母线电压波动小，瞬态电压偏差≤±4%

二、芯片说明

我方考察器件为LM5122 ，项目目标开关频率 250kHz。

LM5122: LM5122 12V-48V@2.5A高性能方案

qianqian liu — Wed, 05 Aug 2026 06:51:47 GMT

Part Number: LM5122

您好！

我们正在开发 4 路 PoE 交换机产品，现将升压电路完整设计需求陈列如下，请您帮忙评估 TI LM5122 是否可以满足下述全部设计指标。

一、电路整体设计需求

1. 功率架构

前级采用 Boost 升压电路，输出 48V 母线，后端驱动 4 路 IEEE802.3at PoE+ PSE 通道；单路 PSE 满载 30W，四路同时满载总功率 120W，短时峰值功率 144W。

2. 输入输出规格

标称输入电压：12V DC

输入电压范围：9~16V DC

输出标称电压：48V DC，输出精度 ±2%

额定输出电流：2.5A，峰值输出电流：3A

3. 性能指标

效率：满载≥91%、半载≥93%、轻载≥90%

输出纹波：≤1%

负载特性：PSE 端口插拔、负载快速跳变时母线电压波动小，瞬态电压偏差≤±4%

二、芯片说明

我方考察器件为LM5122 ，项目目标开关频率 250kHz。

ATL431LI-Q1: Why can't this kind of appearance be tin-plated?

?? ? — Tue, 04 Aug 2026 09:32:13 GMT

Part Number: ATL431LI-Q1

Dear colleagues in the technical field, I have a batch of over 22 DC components: ATL431LIBQDBZRQ1. Currently, we are conducting solderability tests. Regardless of the percentage threshold, the test results show that all terminals are not fully wetted. Please help me investigate what might be the cause. I conducted the test at a temperature of 245 degrees.

This is very important to me. Thank you for your answer.

The picture after tin plating

LM4040: LM4040QBIM3-2.5/NOPB的COD国家

Panny Lu — Tue, 04 Aug 2026 08:34:35 GMT

Part Number: LM4040

查询LM4040QBIM3-2.5/NOPB 的COD国家

LM3429: 期间选型

Elvis Wei — Tue, 04 Aug 2026 03:19:08 GMT

Part Number: LM3429
Other Parts Discussed in Thread: LM3409

LM3429MHX/NOPB、LM3409HVMYX/NOPB，这两款器件。

我想用在驱动LED，最高输出：电压72V，电流3.6A，应该选哪种？

UCD3138CC64EVM-030: UCD3138CC64EVM-030: Design file

Hungming Lin — Mon, 03 Aug 2026 16:13:50 GMT

Part Number: UCD3138CC64EVM-030

Hello,

I don't find the UCD3138CC64EVM-030 PCB layout design files on the TI website. I would appreciate it if you could guide me regarding the same and share the PCB design files compatible with Altium Designer.

Thanks and Regards

UCD3138CC64EVM-030: UCD3138CC64EVM-030: Design file

Hungming Lin — Mon, 03 Aug 2026 16:12:09 GMT

Part Number: UCD3138CC64EVM-030

Hello,

Thanks and Regards

BQ79600-Q1: BQ79600-Q1通信时间相关问题

TC huang — Mon, 03 Aug 2026 10:57:09 GMT

Part Number: BQ79600-Q1
Other Parts Discussed in Thread: BQ79758B-Q1, BQ79616-Q1

您好，我们现在使用BQ79600-Q1 作为base device，BQ79758B-Q1和BQ79712B-Q1作为stack device，BQ系列设备之间通过SPI和菊花链进行通信 ,我想知道主机发送命令需要等待后多久后可以再发送下一条命令

现在我们会使用下面三种命令，请确认下我的等待的时间是否正确

①写入

等待时间= SPI通信时间+Total wait time 250μs

②读取 base device 的数据

等待时间=SPI通信时间 + tWAIT_READ_MAX

tWAIT_READ_MAX =100μs + m*10μs

③读取 stack device 的数据

等待时间=SPI通信时间 + tWAIT_READ_MAX

tWAIT_READ_MAX = (n-1)*3μs*2 + m*10μs + 100μs.

之前的提问中我了解到3μs不是固定值，而是3us是stack设备reclock的时间，以stack芯片数据手册为准。

但对于10μs还有疑问，回答为Byte delay (including reclocking time)的时间，B0 starts forward after the 1st byte is received. 但对应BQ79616-Q1 Daisy Chain Communications 中12μs，和公式中不同，请问具体怎么得到该时间，实际应该参考什么资料才能确保等待了足够的时间

TIDA-011012: TIDA-011012: Request for Reference Firmware / Software Source Code

yu yang — Mon, 03 Aug 2026 08:59:51 GMT

Part Number: TIDA-011012
Other Parts Discussed in Thread: TMS320F28P650DK, CONTROLSUITE, C2000WARE

Hi TI Team,

I am currently evaluating the TIDA-011012 reference design (50kW SiC-based Modular Solid-State Transformer).

I checked the design files on the TI website and found schematics, BOM, and Gerber files, but I couldn't find the firmware/software source code for the main controller (TMS320F28P650DK).

Could you please let me know:
1. Is there an official reference firmware or example source code available for TIDA-011012?
2. If available, how or where can I download the source code/CCS project?
3. If not publicly available, are there any base C2000 controlSUITE/C2000Ware example projects recommended as a starting point for this topology?

Thank you for your support!

TIDA-011012: TIDA-011012: Request for Reference Firmware / Software Source Code

yu yang — Mon, 03 Aug 2026 08:57:25 GMT

Part Number: TIDA-011012
Other Parts Discussed in Thread: TMS320F28P650DK, CONTROLSUITE, C2000WARE, TMDSCNCD28P65X

Hi TI Team,

I am currently evaluating the TIDA-011012 reference design (50kW SiC-based Modular Solid-State Transformer).

I checked the design files on the TI website and found schematics, BOM, and Gerber files, but I couldn't find the firmware/software source code for the main controller (TMS320F28P650DK).

Thank you for your support!

UCC2897A: we use the reference design PMP7499,D12 has strange signal

Richard Zhu — Mon, 03 Aug 2026 07:53:21 GMT

Part Number: UCC2897A

Dear sir,

Ch2 is D12 positive signal,Ch1 is D12 negtive signal,and we changed L4 from 2200uh to 1500uh.The signal of D12 negtive is a little strange,what can i do next?Would you give me a hand

BQ79616EVM-021: BQ79616 EVM 021 评估版进入shutdown功耗问题

Y T — Mon, 03 Aug 2026 06:25:36 GMT

Part Number: BQ79616EVM-021
Other Parts Discussed in Thread: BQ79616

BQ79616 EVM 021 评估版进入shutdown测试R4电阻电压(~0.4V)换算功耗达到2ma，

模式	NPNB	LDOIN	V_BE	I_LDOIN（R4电阻换算）	基极电流估算
ACTIVE	6.58V	6V	0.57V	15.5 mA	15.5/200 ≈ 77µA
SLEEP	6.58V	6V	0.57V	5.5 mA	5.5/200 ≈ 27µA
SHUTDOWN	4.94V	4.4V	0.54V	2.0 mA	2.0/200 ≈ 10µA

TPS92692-Q1: 功能安全信息

chao li — Mon, 03 Aug 2026 03:09:16 GMT

Part Number: TPS92692-Q1

您好：

我想将TPS92692-Q1用于汽车车灯系统设计，产品需要满足ASIL B要求，请问是否可以提供这款芯片的功能安全资料，比如safety manual、FIT、Failure Mode等等；

期待您的回复！