Patent ID: 9627982
Date: 2017-04-18
CPC Classifications: H02M

Claim:
1. A flyback power converter, comprising: a transformer having a primary winding configured to operably receive an input voltage, a secondary winding configured to operably generate an output voltage, and an auxiliary winding; a power switch coupled to the primary winding, configured to operably control an conduction time of the primary winding; a control circuit, configured to operably generate a control signal to control the power switch, the control circuit being an integrated circuit which has a current sense pin configured to operably receive a current sense signal related to a current flowing through the power switch; and a temperature-sensitive resistor coupled between the auxiliary winding and the current sense pin, configured to operably provide a temperature-related signal to the control circuit, such that the control circuit determines whether to trigger an over-temperature protection (OTP) function according to the temperature-related signal, wherein the control circuit obtains the temperature-related signal through the current sense pin.