| 摘要 |
Abstract The present invention provides a residual current protection device, comprising: a leakage detection circuit (6); a trigger circuit (M3) ; a voltage stabilizing circuit (M5) which provides a stable power supply voltage (Vcc) to the leakage detection circuit (6), the power supply voltage being greater than or equal to a voltage required for operation of the leakage detection circuit (6) The voltage stabilizing circuit (M5) comprises: an energy storage capacitor (C2), for storing electrical energy and providing the power supply voltage (Vcc); a charging control circuit connected between the power supply line and the energy storage capacitor (C2), wherein the charging control circuit causes the power supply line to charge the energy storage capacitor (C2) when the voltage (Vcc) on the energy storage capacitor (C2) is equal to or less than a predetermined threshold (Vd), and cuts off charging of the energy storage capacitor (C2) when the voltage (Vcc) on the energy storage capacitor (C2) is greater than the predetermined threshold (Vd). P140881/9837733 L D9 D10!I Ri ___ __ __ __ Ir M51 M2! R2 D3 i ! ,-M2 ---- - 2 5 ND6 Q lI c 5 -.. II -=C: D7. 1 !7 !R4 ' ~ IIGND I Fig. 2 |
