Small-power power supply based on TNY280 power supply controller

• Main Authors: WANG CONG, CHEN YAN, CAI ZHENGZI, ZHANG XIANGSHUAI, ZENG CHEN, LI WEIGUO
• Format: Patent
• Language: English
• Published: 03.06.2015
• 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

The utility model belongs to the power supply technology field, and especially relates to a small-power power supply based on a TNY280 power supply controller. The small-power power supply comprises a front end rectification circuit, a TNY280 power supply controller, a drain electrode clamping protection circuit, a high-frequency transformer, a rear end rectification filter circuit and a feedback circuit. The connection relation of the components is as follows: a 220V alternating current power supply outputs a smooth pure direct voltage via the front end rectification filtering circuit; the voltage is subjected to rapid chopping by the TNY280 power supply controller and a high-frequency voltage is generated; the high-frequency voltage is output through voltage reduction of the high-frequency transformer; the voltage after reduction outputs 5V and 12V direct and stable voltages via the rear end rectification filter circuit. The feedback circuit is used for stabilizing the output voltage. The drain electrode clamping protection circuit is used for protecting an MOSFET integrated inside the TNY280 power supply controller. The small-power power supply can output two stable voltages 5V and 12V, is small and simple in structure, and is especially suitable as an auxiliary power supply of an intelligent device and a low voltage distribution system.