【经验】多颗隔离驱动芯片SI8238共用Disable信号的设计建议，避免单颗失效时影响正常运行

时间： 2021-06-12 来源：世强

技术问答

SILICON LABS 隔离驱动芯片 SI8238 Disable管脚为设备禁用管脚，将其设为高电平时，无论VIA和VIB的状态如何，DISABLE输入都会无条件地将VOA和VOB驱动为低电平。器件操作在DISABLE=VIH之后在tSD内终止，并在DISABLE = VIL之后在tRESTART内恢复。时序图如下：

图1——控制时序图

多颗SI8238共用一个信号控制Disable时，若Disable直接连接在一起，其中一个IC失效后，disable管脚出现异常对地短路时，另外正常的IC无法被关闭。所以Disable管脚间需要做隔离，防止单颗异常影响其他IC工作，建议如下：

图2——Disable管脚设计建议

（1）当输入1为高电平+5V时，Q6/7的基极接到+5V，发射极接地，Q6/7的集电极和发射极导通，导通后压降Uce为0.3V，则输出1/2电压为4.7V。

（2）当输入1为低电平时，Ube <0.7V，Q6/7集电极和发射极不能导通，输出被拉到地端，输出1/2为低电平。

（3）如输出1失效被强制拉低，不会影响到输出2脚。

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型号- SI8230BC-AS1,SI8234CB-D-IS,SI8233AD-D-IS3,SI8231AB-AS1,SI8233BD-D-IS3,SI8234BB-AS1,SI8235BB-D-IM1,SI8238AB-D-IS1,SI8238BB-D-IS1,SI8230BB-AS,SI8234CB-AS,SI8238BD-AS,SI823X,SI8230BB-D-IS1,SI8238AC-AS1,SI8230AB-D-IS1,SI8231BB-AS1,SI8232BC-D-IS1,SI8233AB-AM1,SI8232AC-D-IS1,SI8233CB-D-IM,SI8233AD-AS,SI8235AC-D-IS1,SI8235BA-AS1,SI8233AD-D-IS,SI8234AB-AM,SI8231AD-D-IS,SI8235AD-D-IS,SI8231BB-AS,SI8234AB-AS,SI8230AC-AS1,SI8233BB-AM1,SI8237AB-AS1,SI8235AD-AS,SI8232AD-AS,SI8234AB-AS1,SI8230BD-D-IS3,SI8235AB-D-IM1,SI8234AB-D-IS1,SI8238BC-AS1,SI8237AD-D-IS,SI8235AB-D-IM,SI8235BC-AS1,SI8235AB-D-IS,SI8238BD-AS3,SI8237BB-D-IS1,SI8237AB-D-IS1,SI8231AB-D-IS,SI8233BB-AS,SI8231BB-D-IS1,SI8232AB-D-IS,SI8235AB-AM1,SI8233BB-AM,SI8233AC-AS1,SI8230AB-AS1,SI8230AD-AS,SI8233BC-D-IS1,SI8233AC-D-IS1,SI8234AD-D-IS,SI8233BB-AS1,SI8237BC-D-IS1,SI8230BC-D-IS1,SI8233BB-D-IM1,SI8235AD-AS3,SI8232AB-AS,SI8233AB-D-IS1,SI8235AB-AS,SI8232BB-D-IS,SI8234BB-D-IS1,SI8230AD-D-IS,SI8231BD-AS,SI8232AC-AS1,SI8238AD-D-IS,SI8237BD-AS,SI8234AB-AM1,SI8235AB-AM,SI8234BD-AS,SI8230AB-AS,SI8235BB-AM,SI8234AC-AS1,SI8230BD-D-IS,SI8231BD-D-IS,SI8235AD-D-IS3,SI8232BD-AS,SI8233BD-AS3,SI8238AB-AS1,SI8235BB-AS,SI8235BD-D-IS3,SI8237BC-AS1,SI8230BB-AS1,SI8230BD-AS3,SI8230AC-D-IS1,SI8231AC-AS1,SI8238BD-D-IS,SI8233BD-AS,SI8237BD-D-IS,SI8235BA-D-IS1,SI8235AB-AS1,SI8234BD-D-IS,SI8235BD-D-IS,SI8234BC-AS1,SI8232BD-D-IS,SI8233BD-D-IS,SI8233BB-D-IM,SI8234BC-D-IS1,SI8235BB-D-IS,SI8238BB-AS1,SI8235BB-D-IM,SI8231BC-AS1,SI8237AC-D-IS1,SI8233AD-AS3,SI8232AB-D-IS1,SI8230BD-AS,SI8234BB-D-IM1,SI8238BC-D-IS1,SI8231BB-D-IS,SI8235BB-AS1,SI8231AB-AS,SI8233BB-D-IS1,SI8233BB-D-IS,SI8234BB-AM,SI8234BB-AS,SI8232BB-AS1,SI8233AB-D-IM1,SI8230AD-AS3,SI8238AD-AS,SI8237AC-AS1,SI8234BB-AM1,SI8235BB-D-IS1,SI8235BD-AS,SI8235BD-AS3,SI8230,SI8231,SI8234AB-D-IS,SI8233AB-D-IM,SI8232,SI8233AB-D-IS,SI8234AB-D-IM,SI8232BC-AS1,SI8237,SI8238BD-D-IS3,SI8238,SI8230AB-D-IS,SI8231AC-D-IS1,SI8233AB-AS1,SI8238AD-D-IS3,SI8233,SI8231BC-D-IS1,SI8234,SI8235,SI8233AB-AM,SI8232BB-AS,SI8233AB-AS,SI8235BC-D-IS1,SI8234BB-D-IM,SI8232AD-D-IS,SI8234BB-D-IS,SI8234AC-D-IS1,SI8233CB-AM,SI8238AD-AS3,SI8232AB-AS1,SI8231AD-AS,SI8237AD-AS,SI8231AB-D-IS1,SI8235AC-AS1,SI8234AD-AS,SI8233BC-AS1,SI8232BB-D-IS1,SI8234AB-D-IM1,SI8230BB-D-IS,SI8230AD-D-IS3,SI8237BB-AS1,SI8238AC-D-IS1,SI8235AB-D-IS1,SI8235BB-AM1

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Si823x Data Sheet

型号- SI8234CB-D-IS,SI8238AB-D-IS1,SI8238BB-D-IS1,SI8238BD-AS,SI823X,SI8238AD-D-IS3,SI8238BD-D-IS3,SI8230BB-D-IS1,SI8230AB-D-IS1,SI8231-A-IS,SI8233CB-D-IM,SI8233AD-D-IS,SI8230-A-IS,SI8231AD-D-IS,SI8235AD-D-IS,SI8235-B-IS,SI8235-B-IM,SI8230BD-D-IS3,SI8234AB-D-IS1,SI8237AD-D-IS,SI8233AB-D-IM1,SI8235AB-D-IM,SI8233-B-IS,SI8233AD-D-IS3,SI8235AB-D-IS,SI8235BD-D-IS3,SI8237BB-D-IS1,SI8237AB-D-IS1,SI8231AB-D-IS,SI8231BB-D-IS1,SI8233BB-AS,SI8232AB-D-IS,SI8233BB-AM,SI8233-B-IM,SI8234AD-D-IS,SI8233BB-AS1,SI8234AB-D-IM1,SI8233AB-D-IS1,SI8235BB-D-IM1,SI8230AD-D-IS3,SI8232BB-D-IS,SI8234BB-D-IS1,SI8230AD-D-IS,SI8238AD-D-IS,SI8235BB-AM,SI8230BD-D-IS,SI8231BD-D-IS,SI823,SI8230BB-AS1,SI8238BD-D-IS,SI8237BD-D-IS,SI8233BD-AS,SI8235BA-D-IS1,SI8234BD-D-IS,SI8235BD-D-IS,SI8232BD-D-IS,SI8233BD-D-IS,SI8235-BA-C-IS1,SI8233BB-D-IM,SI8235BB-D-IS,SI8238BB-AS1,SI8235BB-D-IM,SI8232AB-D-IS1,SI8230BD-AS,SI8234BB-D-IM1,SI8235AB-D-IM1,SI8231BB-D-IS,SI8235BB-AS1,SI8233BB-D-IS1,SI8233BB-D-IS,SI8234BB-AM,SI8235AD-D-IS3,SI8235BB-D-IS1,SI8235BD-AS,SI8233BD-D-IS3,SI8235BD-AS3,SI8230,SI8231,SI8234AB-D-IS,SI8233AB-D-IM,SI8232,SI8233AB-D-IS,SI8234AB-D-IM,SI8237,SI8238,SI8230AB-D-IS,SI8233AB-AS1,SI8233,SI8234,SI8235,SI8234-B-IM,SI8234BB-D-IM,SI8232AD-D-IS,SI8234BB-D-IS,SI8231AB-D-IS1,SI8233BB-D-IM1,SI8232BB-D-IS1,SI8232-A-IS,SI8230BB-D-IS,SI8237BB-AS1,SI8234-B-IS,SI8235AB-D-IS1

数据手册 - SILICON LABS - Rev. 2.14 - June, 2019 PDF 英文下载

Si823x Data Sheet

型号- SI8238AB-D-IS1,SI8231BB-D-ISR,SI8238BD-AS,SI8238BD-D-IS3,SI8230-A-ISR,SI8230AB-D-IS1,SI8230BD-D-ISR,SI8235AB-D-ISR,SI8233CB-D-IM,SI8235BD-D-IS3R,SI8230-A-IS,SI8234AD-D-ISR,SI8233BB-D-IM1 R,SI8233BD-D-ISR,SI8235BB-D-IMR,SI8233AB-AS1R,SI8230BD-D-IS3,SI8233AB-D-IM1,SI8235BB-AS1R,SI8233BB-ASR,SI8235BD-D-IS3,SI8237BB-D-IS1,SI8233BD-D-IS3R,SI8231BB-D-IS1,SI8232AB-D-IS,SI8232AB-D-ISR,SI8234BB-D-ISR,SI8231AD-D-ISR,SI8233CB-D-IMR,SI8234AD-D-IS,SI8234BB-D-IM1R,SI8233BB-AS1,SI8238BD-ASR,SI8233AB-D-IS1,SI8235BB-D-IM1,SI8234BB-D-IS1,SI8230AD-D-IS,SI8238AD-D-IS,SI8235BB-AM,SI823,SI8235AB-D-IM1R,SI8230BB-AS1,SI8237BD-D-IS,SI8233BD-AS,SI8234BB-D-IMR,SI8235BA-D-IS1,SI8234BD-D-IS,SI8235BD-D-IS,SI8232AD-D-ISR,SI8232BD-D-ISR,SI8232BD-D-IS,SI8235-BA-C-IS1,SI8233BB-D-IM,SI8235BB-D-IS,SI8235BB-D-IM,SI8233BD-ASR,SI8231-A-ISR,SI8235BD-D-ISR,SI8234AB-D-IM1R,SI8233-B-ISR,SI8234AB-D-IS1R,SI8237BB-D-IS1R,SI8235AB-D-IM1,SI8233BB-D-IS,SI8234BB-AM,SI8237BB-AS1R,SI8235BB-D-IS1,SI8232-A-ISR,SI8235BD-AS3,SI823XXB,SI8230BB-D-IS1R,SI8233BB-D-IS1R,SI8233AB-D-IM,SI8238AD-D-IS3R,SI8233AB-D-IS,SI8230AB-D-IS,SI8232BB-D-ISR,SI8233AB-AS1,SI8231AB-D-IS1R,SI8230BD-D-IS3R,SI8235AD-D-IS3R,SI8235BB-AMR,SI8234AB-D-ISR,SI8233AB-D-IMR,SI8234-B-IM,SI8234BB-AMR,SI8232AD-D-IS,SI8235BB-D-ISR,SI8238AB-D-IS1R,SI8235BD-ASR,SI8231AB-D-IS1,SI8233BB-D-IM1,SI8232BB-D-IS1,SI8238BD-D-ISR,SI8230BB-D-IS,SI823XXC,SI823XXD,SI8234-B-IS,SI8237AD-D-ISR,SI8235-B-ISR,SI8234CB-D-IS,SI8230AB-D-IS1R,SI8233AB-D-IM1 R,SI8238BB-D-IS1,SI8233BB-AMR,SI8231AB-D-ISR,SI8230AD-D-IS3R,SI823X,SI8234BB-D-IS1R,SI8238AD-D-IS3,SI8230BB-D-IS1,SI8234-B-ISR,SI8230AD-D-ISR,SI8231-A-IS,SI8233AD-D-IS,SI8231AD-D-IS,SI8235AD-D-IS,SI8235AB-D-IS1R,SI8235-B-IS,SI8238AD-D-ISR,SI8235-B-IM,SI8234AB-D-IS1,SI8235BA-D-IS1R,SI8237AD-D-IS,SI8237BD-D-ISR,SI8235AB-D-IM,SI8233-B-IS,SI8238BB-AS1R,SI8233AD-D-IS3,SI8235AB-D-IS,SI8237AB-D-IS1,SI8231AB-D-IS,SI8233BB-AS,SI8235AB-D-IMR,SI8230BB-AS1R,SI8233BB-AM,SI8233-B-IM,SI8233BB-D-IMR,SI8235AD-D-ISR,SI8234AB-D-IM1,SI8230BB-D-ISR,SI8237AB-D-IS1R,SI8230AD-D-IS3,SI8232BB-D-IS,SI8232AB-D-IS1R,SI8230BD-D-IS,SI8231BD-D-IS,SI8233AB-D-IS1R,SI8238BD-D-IS,SI8234AB-D-IMR,SI8233AB-D-ISR,SI8233BB-D-ISR,SI8231BB-D-IS1R,SI8238BD-D-IS3R,SI8233BD-D-IS,SI8238BB-AS1,SI8238BB-D-IS1R,SI8232AB-D-IS1,SI8234BB-D-IM1,SI8235-B-IMR,SI8231BB-D-IS,SI8235BB-AS1,SI8233BB-D-IS1,SI8232BB-D-IS1R,SI8235BD-AS3R,SI8235AD-D-IS3,SI8235BD-AS,SI8233BD-D-IS3,SI8230,SI8230AB-D-ISR,SI8231,SI8234AB-D-IS,SI8232,SI8234AB-D-IM,SI8237,SI8238,SI8234-B-IMR,SI8233,SI8234,SI8235,SI8233BB-AS1R,SI8231BD-D-ISR,SI8235BB-D-IM1R,SI8234BB-D-IM,SI8234BB-D-IS,SI8235BB-D-IS1R,SI8233AD-D-ISR,SI8233-B-IMR,SI8234BD-D-ISR,SI8233AD-D-IS3R,SI8232-A-IS,SI8237BB-AS1,SI8235AB-D-IS1

数据手册 - SILICON LABS - Rev. 2.13 - September, 2018 PDF 英文下载

Si823x Data Sheet

型号- SI8234CB-D-IS,SI8238AB-D-IS1,SI8238BB-D-IS1,SI8238BD-AS,SI823X,SI8238AD-D-IS3,SI8238BD-D-IS3,SI8230BB-D-IS1,SI8230AB-D-IS1,SI8231-A-IS,SI8233CB-D-IM,SI8233AD-D-IS,SI8230-A-IS,SI8231AD-D-IS,SI8235AD-D-IS,SI8235-B-IS,SI8235-B-IM,SI8230BD-D-IS3,SI8234AB-D-IS1,SI8237AD-D-IS,SI8233AB-D-IM1,SI8235AB-D-IM,SI8233-B-IS,SI8233AD-D-IS3,SI8235AB-D-IS,SI8235BD-D-IS3,SI8237BB-D-IS1,SI8237AB-D-IS1,SI8231AB-D-IS,SI8231BB-D-IS1,SI8233BB-AS,SI8232AB-D-IS,SI8233BB-AM,SI8233-B-IM,SI8234AD-D-IS,SI8233BB-AS1,SI8234AB-D-IM1,SI8233AB-D-IS1,SI8235BB-D-IM1,SI8230AD-D-IS3,SI8232BB-D-IS,SI8234BB-D-IS1,SI8230AD-D-IS,SI8238AD-D-IS,SI8235BB-AM,SI8230BD-D-IS,SI8231BD-D-IS,SI8230BB-AS1,SI8238BD-D-IS,SI8237BD-D-IS,SI8233BD-AS,SI8235BA-D-IS1,SI8234BD-D-IS,SI8235BD-D-IS,SI8232BD-D-IS,SI8233BD-D-IS,SI8235-BA-C-IS1,SI8233BB-D-IM,SI8235BB-D-IS,SI8238BB-AS1,SI8235BB-D-IM,SI8232AB-D-IS1,SI8234BB-D-IM1,SI8235AB-D-IM1,SI8231BB-D-IS,SI8235BB-AS1,SI8233BB-D-IS1,SI8233BB-D-IS,SI8234BB-AM,SI8235AD-D-IS3,SI8235BB-D-IS1,SI8235BD-AS,SI8233BD-D-IS3,SI8235BD-AS3,SI8230,SI8231,SI8234AB-D-IS,SI8233AB-D-IM,SI8232,SI8233AB-D-IS,SI8234AB-D-IM,SI8237,SI8238,SI8230AB-D-IS,SI8233AB-AS1,SI8233,SI8234,SI8235,SI8234-B-IM,SI8234BB-D-IM,SI8232AD-D-IS,SI8234BB-D-IS,SI8231AB-D-IS1,SI8233BB-D-IM1,SI8232BB-D-IS1,SI8232-A-IS,SI8230BB-D-IS,SI8237BB-AS1,SI8234-B-IS,SI8235AB-D-IS1

数据手册 - SILICON LABS - Rev. 2.13 - September, 2018 PDF 英文下载

Si823x Data Sheet

型号- SI8234CB-D-IS,SI8230AB-D-IS1R,SI8238AB-D-IS1,SI8238BB-D-IS1,SI8233BB-AMR,SI8231AB-D-ISR,SI8230AD-D-IS3R,SI8231BB-D-ISR,SI8238BD-AS,SI823X,SI8234BB-D-IS1R,SI8238AD-D-IS3,SI8238BD-D-IS3,SI8230BB-D-IS1,SI8230AB-D-IS1,SI8230AD-D-ISR,SI8230BD-D-ISR,SI8231-A-IS,SI8235AB-D-ISR,SI8233CB-D-IM,SI8235BD-D-IS3R,SI8233AD-D-IS,SI8230-A-IS,SI8234AD-D-ISR,SI8231AD-D-IS,SI8235AD-D-IS,SI8233BD-D-ISR,SI8235AB-D-IS1R,SI8235BB-D-IMR,SI8233AB-AS1R,SI8235-B-IS,SI8233AB-D-IM1R,SI8238AD-D-ISR,SI8235-B-IM,SI8230BD-D-IS3,SI8234AB-D-IS1,SI8235BA-D-IS1R,SI8237AD-D-IS,SI8233AB-D-IM1,SI8237BD-D-ISR,SI8235AB-D-IM,SI8233-B-IS,SI8238BB-AS1R,SI8235BB-AS1R,SI8233BB-ASR,SI8233AD-D-IS3,SI8235AB-D-IS,SI8235BD-D-IS3,SI8237BB-D-IS1,SI8233BD-D-IS3R,SI8237AB-D-IS1,SI8231AB-D-IS,SI8231BB-D-IS1,SI8233BB-AS,SI8232AB-D-IS,SI8232AB-D-ISR,SI8235AB-D-IMR,SI8230BB-AS1R,SI8233BB-AM,SI8234BB-D-ISR,SI8231AD-D-ISR,SI8233-B-IM,SI8233CB-D-IMR,SI8233BB-D-IMR,SI8234CB-D-ISR,SI8234AD-D-IS,SI8234BB-D-IM1R,SI8233BB-AS1,SI8238BD-ASR,SI8235AD-D-ISR,SI8234AB-D-IM1,SI8233AB-D-IS1,SI8230BB-D-ISR,SI8235BB-D-IM1,SI8237AB-D-IS1R,SI8230AD-D-IS3,SI8232BB-D-IS,SI8234BB-D-IS1,SI8230AD-D-IS,SI8238AD-D-IS,SI8232AB-D-IS1R,SI8235BB-AM,SI8230BD-D-IS,SI8231BD-D-IS,SI8233AB-D-IS1R,SI8235AB-D-IM1R,SI8230BB-AS1,SI8238BD-D-IS,SI8234AB-D-IMR,SI8237BD-D-IS,SI8233BD-AS,SI8234BB-D-IMR,SI8233BB-D-ISR,SI8233AB-D-ISR,SI8231BB-D-IS1R,SI8235BA-D-IS1,SI8234BD-D-IS,SI8238BD-D-IS3R,SI8235BD-D-IS,SI8232AD-D-ISR,SI8232BD-D-ISR,SI8232BD-D-IS,SI8233BD-D-IS,SI8233BB-D-IM,SI8235BB-D-IS,SI8238BB-AS1,SI8235BB-D-IM,SI8233BD-ASR,SI8235BD-D-ISR,SI8238BB-D-IS1R,SI8234AB-D-IM1R,SI8232AB-D-IS1,SI8234AB-D-IS1R,SI8234BB-D-IM1,SI8237BB-D-IS1R,SI8235AB-D-IM1,SI8231BB-D-IS,SI8235BB-AS1,SI8233BB-D-IS1,SI8233BB-D-IS,SI8234BB-AM,SI8232BB-D-IS1R,SI8235BD-AS3R,SI8237BB-AS1R,SI8235AD-D-IS3,SI8235BB-D-IS1,SI8235BD-AS,SI8233BD-D-IS3,SI8235BD-AS3,SI8230BB-D-IS1R,SI8230AB-D-ISR,SI8233BB-D-IS1R,SI8230,SI8234AB-D-IS,SI8233AB-D-IM,SI8231,SI8238AD-D-IS3R,SI8232,SI8233AB-D-IS,SI8234AB-D-IM,SI8237,SI8238,SI8230AB-D-IS,SI8232BB-D-ISR,SI8233AB-AS1,SI8231AB-D-IS1R,SI8233,SI8230BD-D-IS3R,SI8234,SI8235,SI8233BB-AS1R,SI8231BD-D-ISR,SI8235BB-AMR,SI8235AD-D-IS3R,SI8235BB-D-IM1R,SI8234AB-D-ISR,SI8233AB-D-IMR,SI8234-B-IM,SI8234BB-AMR,SI8234BB-D-IM,SI8232AD-D-IS,SI8234BB-D-IS,SI8235BB-D-ISR,SI8235BB-D-IS1R,SI8233AD-D-ISR,SI8238AB-D-IS1R,SI8235BD-ASR,SI8231AB-D-IS1,SI8234BD-D-ISR,SI8233BB-D-IM1,SI8233AD-D-IS3R,SI8232BB-D-IS1,SI8238BD-D-ISR,SI8232-A-IS,SI8233BB-D-IM1R,SI8230BB-D-IS,SI8237BB-AS1,SI8234-B-IS,SI8235AB-D-IS1,SI8237AD-D-ISR

数据手册 - SILICON LABS - Rev. 2.13 - 2018/09/25 PDF 英文下载

Si823x Data Sheet

型号- SI8234CB-D-IS,SI8230BD-D-IS,SI8231BD-D-IS,SI8238AB-D-IS1,SI8238BB-D-IS1,SI8238BD-D-IS,SI823X,SI8237BD-D-IS,SI8230BB-D-IS1,SI8230AB-D-IS1,SI8235BA-D-IS1,SI8231-A-IS,SI8234BD-D-IS,SI8235BD-D-IS,SI8233CB-D-IM,SI8236-B-IM,SI8232BD-D-IS,SI8233BD-D-IS,SI8233BB-D-IM,SI8233AD-D-IS,SI8230-A-IS,SI8235BB-D-IS,SI8235BB-D-IM,SI8231AD-D-IS,SI8235AD-D-IS,SI8235-B-IS,SI8232AB-D-IS1,SI8231BB-D-IS,SI8235-B-IM,SI8233BB-D-IS1,SI8234AB-D-IS1,SI8233BB-D-IS,SI8237AD-D-IS,SI8235AB-D-IM,SI8235BB-D-IS1,SI8233-B-IS,SI8230,SI8234AB-D-IS,SI8233AB-D-IM,SI8231,SI8235AB-D-IS,SI8232,SI8233AB-D-IS,SI8234AB-D-IM,SI8237BB-D-IS1,SI8237AB-D-IS1,SI8231AB-D-IS,SI8236BA-D-IM,SI8237,SI8231BB-D-IS1,SI8238,SI8230AB-D-IS,SI8232AB-D-IS,SI8233,SI8234,SI8235,SI8236,SI8233-B-IM,SI8234-B-IM,SI8234BB-D-IM,SI8232AD-D-IS,SI8234AD-D-IS,SI8234BB-D-IS,SI8231AB-D-IS1,SI8232BB-D-IS1,SI8232-A-IS,SI8233AB-D-IS1,SI8230BB-D-IS,SI8236AA-D-IM,SI8232BB-D-IS,SI8234BB-D-IS1,SI8230AD-D-IS,SI8234-B-IS,SI8235AB-D-IS1,SI8238AD-D-IS

数据手册 - SILICON LABS - Rev. 1.8 - May 17, 2016 PDF 英文下载收起

【应用】高速开关、高共模抑制比隔离驱动芯片SI8275助力轨道交通电源小型化

伴随着高铁项目的飞速发展，轨道交通设备正面临着高效化、小型化的发展道路，轨道交通电源是轨道交通设备的核心，因此首先需要提升轨道交通电源的综合性能。本文将结合Siliconlabs的隔离驱动芯片SI8275，讨论其在轨道交通电源小型化上的应用。轨道交通电源主要通过将车载蓄电池的电压进行高效的降压处理后向机车的各个子系统供电。

应用方案发布时间 : 2020-04-27

【经验】加强版的双驱动芯片Si823H3BD-IS3更完美的做MOS管或SIC MOS管驱动

针对目前电源行业用到上下桥拓扑的设计会用到MOS管或SIC，目前这块的设计处于弱电侧需要供电能够与MCU的供电共用，另外原边的输入可以有上下桥互锁功能，开关频率可以支持到几百KHz，驱动电流可以到4A，针对该运用Slilicon Labs推出的SI823H3BD-IS3副边可以支持到3V的供电电压，4A的拉电流和灌电流，双路独立的驱动，125KV/us的CMTI值，满足AEC—Q100的认证。

设计经验发布时间 : 2019-08-01

全碳化硅功率mos是否和igbt一样驱动需要负压？有没成熟的驱动芯片推荐？

SIC MOSFET驱动是需要负压的，而GaN FET是可以不用负压。成熟的SIC MOSFET驱动芯片，推荐Silicon Labs 的SI827x，可以参考：如何为SIC MOSFET选择一款理想的隔离驱动芯片？

技术问答发布时间 : 2019-10-15

AN1225: Understanding Absolute Maximum Rating and Electrical Overstress Failure in ISODrivers

型号- SI8237,SI823X,SI8238,SI8233,SI8234,SI8235,SI8230,SI8231,SI8232

应用笔记或设计指南 - SILICON LABS - Rev. 0.1 - 2020/03/26 PDF 英文下载

mos驱动芯片，半桥，隔离的有哪些芯片能推荐一下呢！？

推荐使用用SGMICRO（圣邦微）推出的MOS驱动芯片SGM48000，双通道正相输入，能够提供最大2A的峰值电流，并且工作温度范围可达-40℃~+125℃，采用TDFN-2×2-8L和SOIC8两款封装。可以参考文章：【应用】低成本高性能的MOS驱动芯片SGM48000助力电源双路MOSFET驱动。隔离驱动芯片推荐Silicon Labs的隔离驱动芯片SI8273，具有4A的峰值驱动电流，可以满足到MHz的开关频率，CMTI的典型值到200Kv/us，驱动侧供电电压支持到30V,可以用来驱动SIC MOS管驱动，相比其它的驱动芯片，可以提供高的可靠性。可以参考文章：【应用】高可靠性隔离驱动芯片SI8273助力驱动SIC MOS管。

技术问答发布时间 : 2019-11-11

IGBT驱动波形中米勒平台产生的原理是什么？

IGBT驱动波形中米勒平台产生的原理当IGBT在开关时普遍会遇到的一个问题即寄生米勒电容开通期间的米勒平台。米勒效应在单电源门极驱动的应用中影响是很明显的。基于门极G与集电极C之间的耦合，在IGBT关断期间会产生一个很高的瞬态dv/dt，这样会引发门极VGE间电压升高而导通，这是一个潜在的风险，因此为了规避这个风险，有源米勒钳位功能应运而生。图1：下管IGBT因寄生米勒电容而导通有源米勒钳位解决方案要想避免RG优化、CG损耗和效率、负电源供电成本增加等问题，另一种方法是使门极和发射极之间发生短路，这种方法可以避免IGBT不经意的打开。具体操作方法是在门极与射极之间增加三级管，当VGE电压达到某个值时，门极与射极的短路开关(三级管)将被触发。这样流经米勒电容的电流将被增加的三极管截断而不会流向VOUT。这种技术被称为有源米勒钳位技术，具体方法见如下图2。图2：有源米勒钳位采用外加三极管一般选用的隔离驱动芯片（以Silicon Labs Si8285为例）通过IGBT栅极和集电极间寄生电容C_CG及Si8285副边VH pin、外部RH及内部PMOS源极电阻RSS、内部NMOS等对IGBT门极电荷进行放电来达到软关断效果。直至最后退饱和工作完成，故障通过FLT pin隔离输出，反馈给MCU。

技术问答发布时间 : 2018-10-18

【应用】采用车规级SiC功率器件设计的高效6.6KW OBC方案

传统6.6 KW OBC采用Si功率器件来做设计，存在开关频率低，反向恢复时间慢及开关损耗大等问题，效率偏低。为解决上述问题，在主回路电源设计选用车规级SiC MOS管及SiC 二极管，能支持更高开关频率，实现更好开关特性及降低损耗，另外搭配双路的车规驱动芯片，高精度的车规电压采样芯片，高通信速率车规容隔离芯片，可以实现系统效率提升约1%，使6.6KW OBC更高效。

应用方案发布时间 : 2020-04-16