Patent ID: 9712065
Date: 2017-07-18
CPC Classifications: H02M

Claim:
1. A system controller for regulating a power conversion system, the system controller comprising: a first controller terminal associated with a first controller voltage and coupled to a first transistor terminal of a first transistor, the first transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a primary winding of the power conversion system; a second controller terminal associated with a second controller voltage and coupled to the third transistor terminal; a third controller terminal associated with a third controller voltage; a second transistor including a fourth transistor terminal, a fifth transistor terminal and a sixth transistor terminal, the fifth transistor terminal being coupled to the second controller terminal; and a first clamper including a first clamper terminal and a second clamper terminal, the first clamper terminal being coupled to the first controller terminal; wherein: the second controller voltage is equal to a sum of the third controller voltage and a first voltage difference; and the second transistor is configured to change the first voltage difference to turn on or off the first transistor and to affect a current flowing through the primary winding.