Buck type DC/DC convertor circuit with anti-ringing modular circuit
The present invention discloses a buck type DC/DC convertor circuit with an anti-ringing modular circuit. The anti-ringing modular circuit is integrated into a chip, and comprises an oscillator clockmodule, a charge pump module, a high-voltage level shift module and a high-voltage NMOS tube MSW. The...
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| creator | WANG XIALIAN DAI GUODING WU LEI FU HAO TANG WENHAI YU CHANGCUN |
| description | The present invention discloses a buck type DC/DC convertor circuit with an anti-ringing modular circuit. The anti-ringing modular circuit is integrated into a chip, and comprises an oscillator clockmodule, a charge pump module, a high-voltage level shift module and a high-voltage NMOS tube MSW. The operating principle of the system comprises that: under a light-load application, when an induction current when a DC/DC convertor works is smaller than 0, the system enters a DCM working mode, at the moment, upper and lower power tubes MTOP and MBOT are disconnected, internal logic signals ZCD and Mode enables the anti-ringing modular circuit, the high-voltage NMOS tube MSW is controlled to perform short circuit of an inductor so as to switch off an LC oscillation circuit so as to avoid generation of a ringing phenomenon when the DCM works in light-load and allow the system to be stable in a full load application. The NMOS tube is commonly used as a switching device and has advantages atthe aspects of the on resi |
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The anti-ringing modular circuit is integrated into a chip, and comprises an oscillator clockmodule, a charge pump module, a high-voltage level shift module and a high-voltage NMOS tube MSW. The operating principle of the system comprises that: under a light-load application, when an induction current when a DC/DC convertor works is smaller than 0, the system enters a DCM working mode, at the moment, upper and lower power tubes MTOP and MBOT are disconnected, internal logic signals ZCD and Mode enables the anti-ringing modular circuit, the high-voltage NMOS tube MSW is controlled to perform short circuit of an inductor so as to switch off an LC oscillation circuit so as to avoid generation of a ringing phenomenon when the DCM works in light-load and allow the system to be stable in a full load application. 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The anti-ringing modular circuit is integrated into a chip, and comprises an oscillator clockmodule, a charge pump module, a high-voltage level shift module and a high-voltage NMOS tube MSW. The operating principle of the system comprises that: under a light-load application, when an induction current when a DC/DC convertor works is smaller than 0, the system enters a DCM working mode, at the moment, upper and lower power tubes MTOP and MBOT are disconnected, internal logic signals ZCD and Mode enables the anti-ringing modular circuit, the high-voltage NMOS tube MSW is controlled to perform short circuit of an inductor so as to switch off an LC oscillation circuit so as to avoid generation of a ringing phenomenon when the DCM works in light-load and allow the system to be stable in a full load application. 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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 | Buck type DC/DC convertor circuit with anti-ringing modular circuit |
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