Undervoltage locking circuit
The invention relates to the technical field of power supply circuits, in particular to an under-voltage locking circuit which comprises a reference voltage establishing module, a main switching tube and a starting circuit. When the under-voltage locking circuit is started, the starting circuit appl...
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| creator | DONG ZHENBIN SU HAIWEI JI HOUGONG MU XINHUA ZHANG WEI |
| description | The invention relates to the technical field of power supply circuits, in particular to an under-voltage locking circuit which comprises a reference voltage establishing module, a main switching tube and a starting circuit. When the under-voltage locking circuit is started, the starting circuit applies a first voltage to the grid electrode of the main switch tube so that the main switch tube is conducted; the reference voltage establishing module establishes a reference voltage according to a power supply voltage of the power supply circuit and an output signal of the under-voltage locking circuit and outputs the reference voltage to a grid electrode of the main switching tube, and then the starting circuit is closed. The under-voltage locking circuit has the beneficial effects that aiming at the problem that a resistance voltage dividing network in the prior art is easy to operate mistakenly in the starting process, the resistance voltage dividing network is omitted in the under-voltage locking circuit, the |
| format | Patent |
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When the under-voltage locking circuit is started, the starting circuit applies a first voltage to the grid electrode of the main switch tube so that the main switch tube is conducted; the reference voltage establishing module establishes a reference voltage according to a power supply voltage of the power supply circuit and an output signal of the under-voltage locking circuit and outputs the reference voltage to a grid electrode of the main switching tube, and then the starting circuit is closed. 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| language | chi ; eng |
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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 | Undervoltage locking circuit |
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