| 摘要 |
<p>The invention discloses a protection circuit for protecting Electronic Control Unit (ECU) from high voltage automotive transient pulses. The circuit includes an input terminal for receiving an input voltage, an output terminal for outputting an output voltage, a transistor having a predefined threshold voltage connected in series from the input terminal to the output terminal through a load, a Transient Voltage Suppressor (TVS) diode having a predefined breakdown voltage connected in series to the load to limit the voltage applied to the load within safer operating region, wherein in normal condition current flows through the transistor and in the event of high voltage automotive transient pulse above the predefined series transistor cut off threshold voltage, the series transistor goes to cut-off mode and the current flows through the TVS diode reducing the voltage output by the predefined breakdown voltage.</p> |
