CIRCUIT AND METHOD FOR DRIVING SYNCHRONOUS RECTIFIER
PURPOSE: Synchronous rectifier driving circuit and a driving method are provided to offer a stabilized switch driving signal by making a main switch and a synchronous rectifier not being turned on simultaneously. CONSTITUTION: A main switch on-driving detection unit (10) detects a signal of a second...
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| creator | CHO, HYEON BAE KIM, JUNG SOO JUNG, NAK JUN KIM, JAE EUN |
| description | PURPOSE: Synchronous rectifier driving circuit and a driving method are provided to offer a stabilized switch driving signal by making a main switch and a synchronous rectifier not being turned on simultaneously. CONSTITUTION: A main switch on-driving detection unit (10) detects a signal of a secondary side of a transformer according to on-operation of a main switch of a direct current (DC) - direct current (DC) converter. A signal inversion and triangular wave generation unit (20) forms a waveform signal inversed with a voltage signal waveform across a synchronous rectifier. A comparison reference signal generation unit (30) receives a signal from the signal inversion and triangular wave generation unit and generates a DC waveform reference level signal for controlling driving time. A synchronous driving signal generation unit (40) compares the reference level signal and a triangular wave and applies an on-off driving signal to the synchronous rectifier. An on-driving overlap prevention unit (50) removes overlapping with an on-driving range of the main switch from an on-driving control signal of the synchronous rectifier. [Reference numerals] (10) Main switch on-driving detection unit; (20) Signal inversion and triangular wave generation unit; (30) Comparison reference signal generation unit; (40) Synchronous driving signal generation unit; (50) On-driving overlap prevention unit |
| format | Patent |
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CONSTITUTION: A main switch on-driving detection unit (10) detects a signal of a secondary side of a transformer according to on-operation of a main switch of a direct current (DC) - direct current (DC) converter. A signal inversion and triangular wave generation unit (20) forms a waveform signal inversed with a voltage signal waveform across a synchronous rectifier. A comparison reference signal generation unit (30) receives a signal from the signal inversion and triangular wave generation unit and generates a DC waveform reference level signal for controlling driving time. A synchronous driving signal generation unit (40) compares the reference level signal and a triangular wave and applies an on-off driving signal to the synchronous rectifier. An on-driving overlap prevention unit (50) removes overlapping with an on-driving range of the main switch from an on-driving control signal of the synchronous rectifier. 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CONSTITUTION: A main switch on-driving detection unit (10) detects a signal of a secondary side of a transformer according to on-operation of a main switch of a direct current (DC) - direct current (DC) converter. A signal inversion and triangular wave generation unit (20) forms a waveform signal inversed with a voltage signal waveform across a synchronous rectifier. A comparison reference signal generation unit (30) receives a signal from the signal inversion and triangular wave generation unit and generates a DC waveform reference level signal for controlling driving time. A synchronous driving signal generation unit (40) compares the reference level signal and a triangular wave and applies an on-off driving signal to the synchronous rectifier. An on-driving overlap prevention unit (50) removes overlapping with an on-driving range of the main switch from an on-driving control signal of the synchronous rectifier. 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| subjects | APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION |
| title | CIRCUIT AND METHOD FOR DRIVING SYNCHRONOUS RECTIFIER |
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