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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.
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SBD适用于需要低正向电压(VF)和短反向恢复时间(trr)的应用场合。
电源电路二次侧的整流
SBD用于各种降压换流器的二次侧整流,例如反激式、正向式、推挽式、半桥式和全桥式转换器。SBD在导电时会传输电能。因此,当SBD导通时,由于电压降等于其正向电压(VF),因此会发生功率损耗。SBD在反向恢复时间(trr)期间,即从导通状态到关断状态的转换期间,也会遭受较大的开关损耗。具有低VF和低trr的SBD非常适合施加到二次侧SBD的电压低于其最大额定反向电压(VR)的转换器应用。
我们的网站提供了介绍这些转换器操作的视频:
反接保护
当移动设备用户可能将充电器或电池放置在错误的方向时,二极管会与输电线串联插入。当以正确的方向连接二极管时,二极管两端出现的电压降会导致功率损耗。当反向连接的SBD两端的电压低于其VR时,低VF的SBD是理想的选择。
IC保护
一些IC的最大额定输入电压为GND-0.3V至VDD+0.3V。当输入电压可能因振铃而超过最大额定电压时,低VF SBD是理想的选择。
SBD还用于各种器件中,以支持最近低工作电压和低能耗的趋势。例如,SBD用于组成低压(如1.5V)二极管逻辑和欠压检测电路(电压监控电路)。