Switching power supply type charger and power-limiting power supply protection circuit thereof

The invention provides a switching power supply type charger and an LPS protection circuit thereof. The LPS protection circuit is configured to detect a source-drain voltage difference between a source electrode and a drain electrode of an output switch tube, and generate a first output switch tube...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HUANG, WEI, WANG, ZHI-QIANG, ZHANG, YUNAO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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 CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	The invention provides a switching power supply type charger and an LPS protection circuit thereof. The LPS protection circuit is configured to detect a source-drain voltage difference between a source electrode and a drain electrode of an output switch tube, and generate a first output switch tube voltage drop indication signal based on the source-drain voltage difference of the output switch tube and a first output switch tube voltage drop threshold, a second output switch tube voltage drop indication signal is generated based on the source-drain voltage difference of the output switch tube and a second output switch tube voltage drop threshold value; after the output switching tube is conducted and the load of the switching power supply type charger is pulled, detecting the CC end voltage of the switching power supply type charger, generating a first CC end voltage indication signal based on the CC end voltage and a first CC end voltage threshold value, and generating a second CC end voltage indication sig