【经验】内置抗ESD等级4KV的TVS管小信号晶体管模块用于车载音响系统按键灯开关线路
Central推出的小信号晶体管模块CMPDM8120,它内置了一颗抗ESD等级4KV的TVS管,并具有小封装、低门阀电压、低导通阻抗等特点,漏源级之间的电压负荷为20V,特别适合用在14V系统的汽车电子产品的电路中, 下面笔者将分享防静电晶体管模块CMPDM8120在车载音响系统按键灯开关线路中的应用。
图1 CMPDM8120外形图
下面是采用防静电晶体管模块CMPDM812的按键灯开关线路图,其中Q190为CMPDM812,14VSW电压从音响系统外部的电压源提供,PWM从音响的MCU输出,LL+经过接口后输出到按键板的LED灯上,红圈内所示为CMPDM8120内置的TVS管。
图2 车载音响系统按键灯开关线路图
上图开关线路的工作原理是:
当按键板上有按键被按下时,MCU收到按键按下的信号,并输出PWM从而打开Q1902,Q1902打开后R1900的一侧就拉低到地(ground),14VSW通过R1915和R1900再到地形成一个回路并流过电流在R1915上,从而R1915上形成的电压把Q190打开,最终14VSW经过R1902形成电流,电流输出到LL+,并驱动按键板的灯亮起来,C1918的作用是把Q190导通瞬间的尖峰电流平抑掉。
那为何线路中特别需要用到CMPDM8120?
那是因为如果用其它普通的晶体管,可以看到,14VSW是从外部电压源经过音响系统的接插件进来的,而接插件的每个PIN都需要打ESD(静电放电),施加的ESD电压高达4KV,电容C19根本扛不住,ESD能量会直接把晶体管Q190打坏,而这颗Central的晶体管CMPDM8120内置有能抗4KV等级的防静电TVS管,它可以顺利的把14VSW进来的ESD能量经R1900衰减后释放到地上,从而给Q190提供保护。
另外SOT-23小封装防静电晶体管模块CMPDM812的D级(漏级)和S级(源级)之间的电压能扛20V,完全可以承受14VSW(14V电压)的负荷;另外,它860mA的通流能力也足够承受几十mA的灯电流负荷,导通阻抗也很低,因此功耗也比较低。
可见防静电晶体管模块CMPDM812具有的以上特点,确实非常适合用在车载音响系统按键灯开关线路中。
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目录- Part Number Index Small Signal Transistors MOSFETs Bipolar Power Transistors Diodes Protection Devices Rectifiers Thyristors Multi Discrete Modules Package Mechanical Specifications
型号- CMUT3904,CMDZ10L,CMXZ9V1TO,CMZ5935B,P4SMA16A,CMUT3906,CMPZDC2V7,CMPZDC36V,CMSZ5252B,P6SMB56A,CLL4754A,CMF64A,CMR1U-04FL,CMPD2003,CMDZ10V,CMKBR-6F,CMDZ11L,CMZ5936B,CMFSH-3I,CMZ5926BP,CMPD2004,P4SMA17A,CMSZ5253B,CZT2222A,CZR1-04,5SMC100A,CMXZ7V5TO,3SMC5.0A,CLL4753A,1SMB7.5CA,CTLDM7120-M621H,CMDZ11V,CMUDW6001,1.5SMC13CA,CMUD6263E,CMDZ12L,CMSZ5250B,CMZ5933B,CMZ5939BP,P4SMA18A,CLL4752A,1SMB130A,CMHZ5229B,CMPZDC39V,CMDZ12V,1SMB9.0A,3SMC170A,1SMB51A,1SMC110A,CMDZ13L,CMZ5934B,CFSH05-20L,CMSZ5251B,CMLD6263DO,CMPD6263S,CMLT2907A,CLL4750A,CLL4751A,P6SMB170CA,CMHZ5228B,CMPD6263A,CMDZ13V,CMPD6263C,CTLDM8120-M832DS,CTLZ5V1,CMST3410,CMOZ4L7,1SMC85A,CMSH1-100M 55,CTLZ5V6,CMDZ5251B,CSL05D,CMOZ4L3,1SMB30CA,P6SMB51A,CMXTVS5V6,CMF120A,CMXSTB200,CMZ5931B,CMF60A,CMPZ5261B,CMPT404A,1SMC85CA,CMHZ5227B,CMSH1-60 55,CMPT4033,CBRHDSH1-200,CMPSH05-4,CMF8.5A,CMZ5932B,CMMR1U-08,CMMR1U-06,CMDZ5250B,P6SMB250A,BZV55C7V5,CTLTVS5V0B,CMPSH-3SE,CMPZ5260B,CMHZ5226B,CBCX68,CBCX69,1SMB54A,CFTVS5V0BULC,CTLDM8002A-M621H,1SMC100CA,CMUT5551E,P6SMB120A,CMXZ20VTO,CMPSH-3,CMPZ5263B,CMDZ4V7,P6SMB51CA,CMHZ5225B,CMDZ4V3,1SMC40A,CMR2-06MFL,CFTVS5V0LC,CMLT3474,CMZ5948BP,P6SMB8.2A,CTLSH1-40M832DS,CMOZ8V2,1SMC7.5A,3SMC12CA,CMDSH2-4L,CMPZ5262B,CMZ5930B,CMZ5913BP,CMHZ5224B,1SMC6.5CA,1.5SMC39CA,5SMC58A,CMLM2205,CMDZ5255B,1SMB78CA,CXDM4060N,C4SMAFL36A,CXDM4060P,CBRLD1-04,CZT7090LE,CMF24A,CBRLD1-02,CMHZ5223B,CMSH1-60HE 55,BZX84C9V1,CBRLD1-08,CBRLD1-06,P6SMB16A,CMJH180,CMKSH-3DO,CMLT3410,CMDZ5254B,1SMB43CA,1SMC170CA,P4SMA170A,CMUD2836,C4SMAFL100A,CMHZ5222B,CMUD2838,1.5SMC47A,1SMB150CA,P6SMB15A,CMF8.0A,CMSZDA8V2,P4SMA10A,P4SMA58A,1SMB10A,1SMC43A,CMDZ5253B,CTLSH10-60M856,1SMB58A,CMHZ5221B,CSHD5-25L,P6SMB91CA,CJD200,1.5SMC170CA,1SMB170A,CMF26A,CZT250K,P6SMB16CA,P4SMA11A,1SMB11A,1SMC150A,CMDZ5252B,CMLZDA7V5,CTLT8099-M322S,1SMC7.0A,CEDM7004VL,CMSH3-100,P6SMB13A,CJD210,CMLD2004DO,CLL4759A,1SMC54CA,P4SMA5.0A,CBRLD1-10,CMPT3906E,CSDD-12N,CMDZ5259B,CMPD2838,P4SMA12A,CMPZ4109,CMPZDA9V1,CMPZ4107,1SMB12A,5SMC54A,CMPZ4108,1SMC45A,1.5SMC220A,CMPZ4105,CMPZ4106,CMPZ4103,CMF160A,CMPZ4104,CMPZ4101,CMPZ4102,CMPD2836,CMPZ4100,CMDZ4L7,CMHZ5267B,P6SMB12A,CMLZDA3V6,CMLT6427E,CMDZ4L3,CMLZDA3V0,CMF20A,CMLTA94,CMLZDA3V3,CLL4758A,CMSH1-100,1SMB5.0A,CSDD-12M,1SMC8.5CA,CMDZ5258B,P4SMA13A,1SMB5.0CA,CMHZ4700,1SMB13A,CMR1-10M,CMPT5551E,P6SMB10A,CMHZ5266B,P6SMB11A,CLL4757A,CMPT3904E,3SMC48A,CBRSDSH2-40,P6SMB100CA,CMDZ5257B,CMR3U-02M,CMXZ4V7TO,P4SMA14A,CMHZ4710,CMHZ4711,1SMB14A,CMOZ4V7,1SMB12CA,CMPZ4123,CMPZ4124,CMPZ4121,CMLZDA43V,CMPZ4122,CMHZ5265B,CMHZ4709,CMPZ4120,CMR1U-10,CLL4756A,3SMC45A,CMF22A,CTLDM7120-M832DS,CMHZ4701,CMHZ4702,CMDZ8V2,CMHZ4703,CMHZ4704,CMKZ5261B,CMHZ4705,CTLSH1-40M621H,CMHZ4706,CMHZ4707,CMHZ4708,3SMC8.0CA,CBRSDSH2-60,CMR3U-01M,CMDZ5256B,P4SMA15A,CMPZ4118,CMPZ4119,CMUSH05-4,CZT2955,CMPZ4116,CMPZ4117,1SMB15A,CMPZ4114,1SMC48A,CMPZ4115,CMPZ4112,CMPZ4113,CMPZ4110,CMSH1-200HE 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【产品】100V/5A的大电流PNP晶体管模块
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目录- MOSFETs
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器件选型 发布时间 : 2018-09-14
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型号- CTLM1074-M832D,CTLM1074-M832D TR,CTLM1074-M832D BK
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夜视仪能够有效增强人们在夜晚或光线不足环境中的视觉能力,保证人们可以及时准确地观察周围事物。在夜视仪的控制/切换电路中,Central推荐使用的元器件是小信号晶体管(CMLT491E/CXT491E);整流器(CMMR1-10);开关二极管(CMOD4448)和齐纳二极管(CMOZ6L8),性能优异,封装尺寸小,可以保证控制电路/切换电路长期有效的工作。
器件选型 发布时间 : 2019-08-22
【选型】机顶盒电源管理模块上MOSFET、小信号晶体管、肖特基整流器、全波桥式整流器、瞬态电压抑制器、齐纳二极管选型推荐
机顶盒的电源管理模块中,Central推荐使用MOSFET(CMPDM302PH/CMLDM7005);小信号晶体管(CMPTA42/CMPTA92);肖特基整流器(CMSH3-200MHV/CMSH5-200HV);全波桥式整流器(CBRHD-06/CBR1-D060S);瞬态电压抑制器(3SMC170CA)和齐纳二极管(CMHZ5226B thru CMHZ5242B),可以提供可靠工作性能。
器件选型 发布时间 : 2019-08-28
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品牌:Central Semiconductor
品类:Surface mount-MOSFET
价格:¥0.7919
现货: 16,000
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支持 3Hz ~ 26.5GHz射频信号中心频率测试;9kHz ~ 3GHz频率范围内Wi-SUN、lora、zigbee、ble和Sub-G 灵敏度测量与测试,天线阻抗测量与匹配电路调试服务。支持到场/视频直播测试,资深专家全程指导。
实验室地址: 深圳/苏州 提交需求>
世强深圳实验室提供Robei EDA软件免费使用服务,与VCS、NC-Verilog、Modelsim等EDA工具无缝衔接,将IC设计高度抽象化,并精简到三个基本元素:模块、引脚、连接线,自动生成代码。点击预约,支持到场/视频直播使用,资深专家全程指导。
实验室地址: 深圳 提交需求>
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