Patent ID: 11889863
Assignee: CHANGZHOU PATENT ELECTRONIC TECHNOLOGY CO., LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC A  H | IPC A  H

Claim 5:
6. The voltage output circuit according to claim 1, wherein the control chip (U6) further comprises a second enable signal output terminal (34), a first current receiving terminal (35), and a second current receiving terminal (36), the voltage output circuit further comprises a resistance detection circuit (110), the second enable signal output terminal (34) of the control chip (U6) is connected to the resistance detection circuit (110);
the resistance detection circuit (110) comprises a sixth current limiting resistor (R23), a seventh current limiting resistor (R22), a first detection resistor (R18), a second detection resistor (R21), a third detection resistor (R20), a fifth filter capacitor (C25), a sixth filter capacitor (C24), and a third switching element (Q5);
a fifth channel terminal (38) of the third switching element (Q5) receives the system power supply voltage and is connected to the second enable signal output terminal (34) of the control chip (U6) through the sixth current limiting resistor (R23); a third control terminal (40) of the third switching element (Q5) is connected to the second enable signal output terminal (34) of the control chip (U6) through the seventh current limiting resistor (R22); a sixth channel terminal (39) of the third switching element (Q5) is connected to the second channel terminal (28) of the buck switch chip (U2) through the first detection resistor (R18);
one end of the second detection resistor (R21) is grounded through the fifth filter capacitor (C25) and is connected to the first current receiving terminal (35) of the control chip (U6), the other end of the second detection resistor (R21) is connected to the second channel terminal (28) of the buck switch chip (U2);
one end of the third detection resistor (R20) is grounded through the sixth filter capacitor (C24) and is connected to the second current receiving terminal (36) of the control chip (U6), the other end of the third detection resistor (R20) is connected to the sixth channel terminal (39) of the third switching element (Q5).