In the event of an overload when ILOAD exceeds its maximum permissible value, the increase in voltage across R6 results in sufficient base-emittervoltageto turn on Q2.
当iload超过最大允许值时发生过载情况,R6上的电压增大导致基极-发射极电压足够大到导通Q2。
2
The temperature is higher, the change of input current I_F according to the same change in value of the base-emittervoltage V_ (BE) is smaller.