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FRD代表快速恢复二极管。快速恢复二极管比典型二极管具有较短的反向恢复时间(trr),所以提供更快的开关时间和更低的损耗。
快速恢复二极管(FRD)具有较短的反向恢复时间(trr),因此在开关速度和开关损耗方面优于典型的整流二极管。
东芝将FRD归类为一种整流二极管。
由于FRD的反向恢复时间(trr)短,因此适用于高速整流。由于耐压很高,它们也非常适用于开关频率低于数百赫兹的AC-DC转换器和逆变器。
缩短FRD的反向恢复时间有一个缺点:FRD的正向电压和漏电流高于典型的整流二极管。因此,FRD需要散热和安全设计,同时考虑正向和反向损耗。
Ch特性 | 符号 | 测试条件 | 最小值 | 典型值 | 最大值 | 单位 |
---|---|---|---|---|---|---|
峰值正向电压 | VFM | IFM=0.1 A(脉冲测量法) |
— | 0.9 | — | V |
IFM=0.7 A(脉冲测量法) | — | 1.4 | — | |||
IFM=1.0 A(脉冲测量法) | — | 1.5 | 2.0 | |||
重复峰值反向电流 | IRRM | VRRM=600 V(脉冲测量法) | — | — | 50 | µA |
反向恢复时间 | trr | IF=1.0 A,di/dt=-30 A/µs | — | — | 100 | ns |
超级快速恢复二极管(S-FRD)的数据表示例
特性 | 符号 | 测试条件 | 最小值 | 典型值 | 最大值 | 单位 |
---|---|---|---|---|---|---|
峰值正向电压 | VFM(1) | IFM=0.1 A(脉冲测试法) | — | 0.80 | — | V |
VFM(2) | IFM=0.7 A(脉冲测试法) | — | 0.91 | — | V | |
VFM(3) | IFM=1.0 A(脉冲测试法) | — | 0.94 | 1.1 | V | |
重复峰值反向电流 | IRRM | VRRM=600 V(脉冲测试法) | — | — | 10 | µA |
典型的整流二极管数据表示例
关于反向恢复时间的说明,请参阅以下FAQ。
关于产品,请参考以下链接。