搜索优化
English
搜索
Copilot
图片
视频
地图
资讯
购物
更多
航班
旅游
酒店
房地产
笔记本
Top stories
Sports
U.S.
Local
World
Science
Technology
Entertainment
Business
More
Politics
过去 30 天
时间不限
过去 1 小时
过去 24 小时
过去 7 天
按相关度排序
按时间排序
Texas Instruments
2 天
UCC28180: 网侧输入低穿偶发PFC MOS过流烧毁
PFC工作环境:网侧220V市电输入,380V输出,设备为无线充电设备发射端,UCC28180用作boost pfc供电,设备满载功率为800W,电路可参考下图 问题现象:在设备满功率运行时网侧出现短时低穿,将PFC MOS击穿,经过后续复现,捕捉到PFC电感的电流波形ch4以及PFC输出电压 ...
来自MSN
12 天
腾冲火山竟然长得像云南的“菌子”?而且还成群结对!
我国的云南省腾冲市,在西汉时称为“滇越”,1913年(民国二年)改称为腾冲县,现为云南省辖县级市。腾冲市境内新生代以来形成的火山群(腾冲火山群)是我国最大的活火山群之一,约包含97座火山,火山喷发活动始于中新世,延续至全新世。
一些您可能无法访问的结果已被隐去。
显示无法访问的结果
今日热点
SK president impeached
Sentenced for shootings
US couple killed in Mexico
Settle sexual assault suit
Charged with threatening
Reveals cancer diagnosis
To end daylight saving time?
$1M to inaugural fund
Trump eyes privatizing USPS
Former SC lawmaker dies
Paxton sues New York doctor
Released by Dolphins
First human case in La.
Bank groups sue CFPB
GA judge denies motion
Workers authorize strike
UKR targets RU oil facility
DEI official fired
Bid to delay US ban denied
US obesity rates drop
Geminid meteor shower
To hear CA emissions case
Pelosi undergoes surgery
Denied new trial
14 North Koreans charged
Evacuated from Syria
Makes history at BBMAs
Pearl Harbor survivor dies
Ex-Syrian official charged
To lead intelligence board
Defamation suit settlement
Becomes Georgia's president
Targeted in bomb threat
US airman sentenced in JP
反馈