维安推出基于PPTC的解决方案,解决智能穿戴可能存在的安全隐患

2023-12-01 WAYON官网
PPTC,IH-SMD0806-110,IH-SMD0806-070,LP-HSML010 PPTC,IH-SMD0806-110,IH-SMD0806-070,LP-HSML010 PPTC,IH-SMD0806-110,IH-SMD0806-070,LP-HSML010 PPTC,IH-SMD0806-110,IH-SMD0806-070,LP-HSML010

年来,智能穿戴产品持续火热,目前市场上智能穿戴产品主要有智能手表、智能眼镜、智能手环、耳带式设备、健康穿戴、体感控制等设备。智能穿戴产品与使用者直接身体接触的特点,使产品的安全性变的尤为重要,国际电工委员会(IEC)也提出了相关的安全要求——IEC62368《音频/视频、信息和通讯技术设备-安全要求》,在标准中对产品可能存在的安全隐患提出了测试要求,下面介绍下智能穿戴可能存在的安全隐患以及解决方案。


故障隐患

1、PMIC失效

为了应对静电或者浪涌的侵扰,产品的设计者会在充电口增加保护器件,在实际使用中这些保护器件能应对几乎所有的状况,但是在实际使用过程中还是会存在超过保护器件能力的情况,造成PMIC的失效。   

         

在穿戴设备中PMIC除了电源管理外,还通过电源管理芯片对电池的充电过程进行管理,一旦PMIC失效会导致充电过程不受控制,电池出现过充的隐患,IEC62368中的单一故障模拟也会评估PMIC短路后设备是否会出现安全事故。


2、后级元器件阻性失效

与PMIC失效情况类似,板端后级的半导体元器件会存在阻性失效的故障,故障发生后失效元件会与电池形成一个导通回路,电阻在电流的作用下会持续发热,引起高温,严重的话会烫伤客户。如图1为半导体器件阻性失效(20Ω左右),电流在0.2A时,元器件表面温度会超过90℃。


图1 半导体器件阻性失效


3、 充电线故障

磁吸式线材因使用方便,学习成本低等一些特有的优势,在智能穿戴领域被广泛的使用。但其吸附金属异物的特质,使用过程中极易出现故障隐患,造成充电线功能失效或者热损,如图2所示。


图2 充电线热损失效案例


解决方案

方案一:充电口过流保护

图3 PPTC充电端口过流防护


对于充电回路中的短路故障,在充电回路中增加一颗保护器件是很有必要的,PPTC是一个好的选择,如图3所示,PPTC安装在充电口。


有故障的情况下,PPTC会及时切断适配器输出的大电流,避免更恶劣的安全事件发生。


方案二:板端过温保护

目前有些板端会通过NTC进行温度检测,信号传递给MCU,由MCU来作出保护动作。半导体器件MCU也会存在失效的可能,具有过温保护功能的PPTC是一个很好的选择,出现故障后PPTC客户避免设备出现热失控,把温度控制在一定的范围内。


图4 PPTC板端过温保护

 

方案三:数据线过流过温保护

磁吸式充电线的主要有以下两种故障模式:1、硬短路后的大电流导致pogo pin内弹簧失效,2、微短路后发热导致端口热损。


根据IEC62368标准,类似智能穿戴类这种不标配电源适配器的充电线,外壳需要满足V-0阻燃的要求,充电线增加PPTC后可以规避该条款。


图5 防止电引起着火模型


 维安智能穿戴推荐PPTC主要规格


授权代理商:世强先进(深圳)科技股份有限公司
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本文由Vicky转载自WAYON官网,原文标题为:智能穿戴产品也有安全隐患?不慌,保护方案已经出现,本站所有转载文章系出于传递更多信息之目的,且明确注明来源,不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。

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SERIES,WMN15N60F2,WMN26N65F2,WMZ53N60F2,WML10N70D1,WMK20N65EM,WPCM32J120T2B,WMP05N65MM,WMB108N03T1,WMLL025N10,WMK28N50C4,WMX12N65D1,WMJ40N50C4,WMLL020N10HGS,WML15N80M3,WMN10N65EM,WMP13N50C4,WMO80R260S,WMB034N06HG4,WMF07N60C4,WMX13N50D1,WMO05N80M3,WMM07N90C2,WMM80R600S,WML06N80M3,WML80R260S,WMK90R500S,WMN90R500S,WMO06N80M3,WMQ023N03LG2,WMM12N105C2,WMO25N10T1,WMK20N65D1,WMM14N70C4,WMP06N90C2,WMK36N65C4,WML09N90C2,WMP03N80M3,WMN20N70EM,WMM05N65MM,WMJ80N65C4,WMK05N90C2,WMX20N65D1,WMN08N80M3,WMP20N65EM,WMM30N65EM,WMK30N70EM,WMF10N65C4,WMX049N12HG2,WMX4N65D1,WML07N80M3,WMM06N50C4,WMO09N90C2,WMJ53N60C4,WMK040N08HGS,WMK7N65D1,WMP80R600S,WMJ9N150D1,WMZ53N60C4,WMK26N65C4,WML80R850S,WMN10N50C4,WML25N70EM,WMM13N80M3,WMJ28N60C4,WMJ10N100D1,WMK13N50D1,WMK14N65SR,WML08N65C4,WMN03N90C2,WMJ80R350S,WMX20N50D1,S SERIES,WMK28N65C4,WMM40N50C4,WMM14N65C4,WML14N60C4,WMK13N50C4,WMO05N100C2,WML11N70SR,WMN07N95C2,WMZ28N60F2,WMM03N80M3,WMM15N70C4,WMP06N70EM,WMN20N65EM,WMP90R360S,WMO175N10LG4,WMK18N50C4,WMO10N105C2,WMF08N65C4,WMO11N95C2,WMK08N60C4,WMX028N10HGS,WMP14N70C4,WMP12N80M3,WMM06N65EM,WMB098N06LG2,WMK26N65F2,WMZ26N60C4,WMK90R830S,WMO25N50C4,WMN07N60C4,WMN11N65SR,WML14N60F2,WML12N95C2,WMF05N70MM,WMO55N03T1,WMJ90N65SR,WML08N65EM,WMJ28N60F2,WMZ13N65EM,WMX058N12HG2,WMK08N95C2,WMN10N65F2,WML6N100D1,WMM028N10HGS,WML90R1K1S,WMLL009NV6,WMZ36N60C4,WMJ80R260S,WMN14N70SR,WML05N80M3,WMK14N70C4,WMB013N04LG4,WMP26N60F2,WMJ9N90D1,WMN10N105C2,WMJ4N150D1,WMM10N60C4,WML06N65EM,WMJ36N60C4,WMM26N70SR,WML20N70EM,WMO20N15T2,WMN05N95C2,WMP07N100C2,WMO07N105C2,WMN18N70EM,WMM05N90C2,WMK13N65EM,WMK25N80M3,WMJ90R360S,WMJ120N60C4,WMM16N70SR,WMM11N80M3,WMJ3N150D1,WML9N90D1,WMM22N50C4,WMK18N65EM,WMP10N100C2,WMN15N95C2,WMM161N15T2,WMM07N70C4,WMN13N70EM,WMK12N100C2,WMR14N03TB,WML26N65F2,WMK10N80M3,WMP10N80M3,WMN05N105C2,WMP11N95C2,WML80R720S,WMM14N65F2,WMO16N65SR,WMO80R350S,WMO07N65C4,WMN15N60C4,WMO08N70C4,WMK28N65F2,WMP26N60C4,WMJ36N60F2,WMP14N65SR,WMLL099N20,WMK9N90D1,WMP13N65EM,WMM10N60F2,WMJ12N80M3,WMK80R850S,WMO10N50C4,WMM4N90D1,WMP26N65C4,WM03P51A,WMM15N65F2,WMM08N70EM,WMP13N80M3,WML30N80M3,WMJ26N65SR,WMPN40N50D1,WMN26N65SR,WMO08N65C4,WMK11N65SR,WMO12N80M3,WMM040N08HGS,WML06N50C4,WMP06N50C4,WML10N65C4,WML90R830S,WMX10N65D1,WMN07N65C4,WMM12N95C2,WMJ28N65F2,WMO26N60C4,WMO80R1K0S,WMZ53N65C4,WMK12N80M3,WMB032N04LG2,WMN08N95C2,WMO18N20T2,WMK26N60C4,WML20N70D1,WMB018N04LG2,WML08N80M3,WMO16N70SR,WMM30N70EM,WMM07N95C2,WMZ36N65C4,WML16N65SR,WMB060N08LG2,MA SERIES,WML15N95C2,WMM12N100C2,WMK22N50C4,WML07N70C4,WML14N65F2,GS系列,WMK07N105C2,WMLL017N10,WMM043N12HGS,WM02N31M,WML26N70SR,WMN36N65C4,WMJ12N120D1,WMH4N80D1,WMO05N95C2,WM03N58M,WML15N60C4,WMK14N60C4,WMK18N70EM,WMM08N70C4,WMN05N100C2,WMLL020N08,WML20N50D1,WMX161N15T2,WMJ12N100C2,WMM90R1K1S,WMN80R260S,WMM06N80M3,WMM05N80M3,WMQ55P02T1,WMB31430DN,WMM05N105C2,WMM14N70SR,WMX043N10HGS,WMK26N60F2,WMO10N100C2,WMJ35N80M3,WMO14N70C4,WMK80R720S,WMP06N65EM,WMN06N90C2,WMM043N10HGS,WMP90R500S,WMO08N65EM,WMN53N65C4,WMN10N60F2,WMM53N60C4,WMP05N70MM,WMN13N50C4,WMLL015N08HGS,WMK90R360S,WMJ30N65EM,WMN06N70EM,WMP90R830S,WMK03N80M3,WMK3N150D1,WPCM75J120T2B,WMN03N80M3,WML15N60F2,WMX12N70D1,WMP26N65F2,WMN11N70SR,WML10N80M3,WMN22N50C4,WMO15N60F2,WMX198N15HG2,WML11N95C2,WMN08N60C4,WML07N100C2,WMO03N90C2,WMX4N80D1,WMJ28N65C4,WMM90R1K5S,WMK25N65EM,WML14N65C4,WML40N50C4,WMJ15N80M3,WMN05N90C2,WMJ90N65C4,WMJ80N65EM,WMM10N100C2,WML10N105C2,WMP08N70EM,WMN14N60C4,WMJ80N65F2,WML10N50C4,WMN80R850S,WML05N100C2,WMP80R850S,WMK25N50C4,WM03P91A,WMO10N70EM,WML28N60C4,WMK05N105C2,WMX16N70D1,WMM14N65SR,WML03N90C2,WML90R260S,WMN90R260S,WML20N65EM,WMLL015N08,WMO9N65D1,WML80R350S,WMK12N65D1,WMM28N65C4,WMZ14N60C4,WMX025N06HG2,WMM36N60F2,WMO14N65C4,WMM15N80M3,WMK10N60F2,WMM25N80M3,WMO10N70C4,WMO11N80M3,WMO07N70C4,WML06N70EM,WMN07N100C2,WMO08N80M3,WMN05N70MM,WML30N65EM,WMP05N105C2,WMP11N70SR,WMN10N80M3,WMJ30N70EM,WMP22N50C4,WML13N70EM,WMK90N08TS,WML16N70D1,WMM18N65EM,WML53N65F2,WMO14N65F2,WMB050N04LG2,WMN80R720S,WMM28N65F2,WMM80R160S,WMB13N65EM,WMO90R1K5S,WMN13N65EM,WMN07N80M3,WMP05N90C2,WML10N65EM,WMF06N80M3,WML10N65F2,WMO07N90C2,WMK06N80M3,WM02DN60M3,WMB014N06HG4,WMLL014N06HG4,WMB034N06LG4,WMQ40N03T1,WMF10N60C4,WMP14N70SR,WMM36N60C4,WMP06N80M3,WMX060N10HGS,WMK14N70SR,WM02P06F,WM02P06H,WMM26N60F2,WML06N90C2,WMK10N60C4,WMO100N07T1,WMN09N90C2,WMK80N06TS,WMK07N60C4,WMK05N65MM,WMN36N65F2,WMB150N03TS,WMO80R600S,WMJ20N70EM,WML05N95C2,WMP10N60F2,WMJ90N65F2,WM0XPXXXR,WMB016N06HG4,WMF05N65MM,WMB119N10LG2,WML10N65D1,WMS690N15HG2,WMP07N95C2,WML07N65C4,WMM15N65C4,WMK07N95C2,WMP15N70C4,WMK15N70C4,WMM18N50C4,WM02DN080C,WML12N105C2,W

商品及供应商介绍  -  WAYON  - V1.0  - 2023/8/11 PDF 英文 下载

WAYON自恢复保险丝选型表

WAYON(维安半导体)提供自恢复保险丝选型:IH @25℃(A):0.01-14,IT @25℃(A):0.05-23.8,Vmax(V):6-600,Imax(A):1-100,Rmin(Ω):0.0005-70,Pd Typ(W):0.26-4.6.

产品型号
品类
IH @25℃(A)
IT @25℃(A)
Vmax(V)
Imax(A)
Max Time to Trip Current(A)
Max Time to Trip Time (S)
Pd Typ(W)
Rmin(Ω)
R1 max(Ω)
UL
TUV
Package
LP-TSM001/60
自恢复保险丝
0.01
0.05
60
10
0.20
1.00
0.5
15.000
200.000
×
×
0603

选型表  -  WAYON 立即选型

zeptoSMDC Series Surface Mount Datasheet

型号- ZEPTOSMDC SERIES,ZEPTOSMDC,ZEPTOSMDC0011F,ZEPTOSMDC0015F

数据手册  -  LITTELFUSE  - 04/15/24 PDF 英文 下载

半导体先锋维安(WAYON)授权世强硬创代理分销,产品或实现替代

维安(WAYON)旗下拥有PTC、FUSE、SCF、TVS、ESD、OCP、OVP、E-FUSE等电路保护产品,以及MOSFET、Diodes、Transistors、SiC SBD、Automotive等功率产品,覆盖工业与物联网、消费类电子、新能源,网络通信、汽车等行业。

签约新闻    发布时间 : 2023-09-12

【产品】额定工作电压16~60V的维安车规级PPTC,电机堵转电流最大可达35A,可有效解决电机过热问题

PPTC保护方案是中小型直流电机的主流保护方案之一,汽车电机过热可能会损坏烧毁,将PPTC器件安装在靠近马达或者线圈的位置,电机堵转时的热量,将有利于PPTC器件更快的起到保护作用。额定工作电压16~60V的维安车规级PPTC,电机堵转电流最大可达35A。

产品    发布时间 : 2023-09-05

WAYON 公司介绍 电路保护/功率半导体/IC产品

型号- WP3883CL系列,4030,0603系列,WJ1028-AT,WR0120-AT,2410系列,WP311X,1140,WR00521-AT,WP3883CL,5432系列,0402,4030系列,MLR,WR0115-AT,2718系列,0603,WP311X系列,9550系列,WR0366-AT,WJ1021-AT,5432,1206系列,WR0368-AT,WJ1050-AT,0402系列,WJ1044-AT,9550,WR0322-AT,1140系列,1206,2410,WJ1042-AT,WJ1040-AT,2718,C4 系列,MLR系列

商品及供应商介绍  -  WAYON  - V1.0  - 2023/7/25 PDF 中文 下载

【元件】维安世界首创新型封装HF系列PPTC产品,具有优良的电气绝缘性、耐老化特性以及阻隔特性,延长PPTC的使用寿命

维安(WAYON)世界首创新型封装PPTC产品-----HF系列,新型封装PPTC的芯材裸露部位被封装层完全覆盖,封装层具有“不融不溶”特性,具有优良的电气绝缘性、耐老化特性以及阻隔特性。利用其优良的阻隔特性,可以有效的阻隔湿气或者有机溶剂对PPTC芯材的侵入,延长PPTC的使用寿命,提高产品的可靠性。

新产品    发布时间 : 2023-08-30

Smart Wearables & Gaming Controllers Mobile and Wearable

型号- PTS645,KMR4,SC1205-01ETG,SPHV-C,LS0504EDD12,THB001P,LS0504EVT233,LQ0502,SETP™,LQ0504,VTP,MHP-TAS,NANOT,SP3021,MHP-XXX,LS0505EVD22,SPXX,SP1021,VLR,KMT0,0603L,SP1006-01UTG,KSC7

应用及方案  -  LITTELFUSE  - 2023/11/7 PDF 英文 下载

【选型】力特聚焦便携式医疗健康设备,提供先进的负载开关及自恢复PPTC等解决方案,器件小型化特点

具体到便携式医疗健康设备的特定层面,需要考虑其功能、成本与尺寸大小,人机界面的用户友好,以及操作开关等元器件的可靠性等等,这些选项往往互相影响,需要仔细权衡。Littelfuse聚焦便携式医疗健康设备,推出适用于便携设备的执行器开关,负载开关,自恢复PPTC,SMT检测开关。

器件选型    发布时间 : 2023-05-30

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TFT LCD液晶显示屏/模组定制

可定制显示屏的尺寸0.96”~15.6”,分辨率80*160~3840*2160,TN/IPS视角,支持RGB、MCU、SPI、MIPI、LVDS、HDMI接口,配套定制玻璃、背光、FPCA/PCBA。

最小起订量: 1000 提交需求>

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