Title:
BUCK TOPOLOGICAL CIRCUIT FOR POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2021/047387
Kind Code:
A1
Abstract:
Embodiments of the present application provide a BUCK topological circuit for power supply. The circuit comprises: a rectification module, a first filtering and energy storage module, a buck constant current driver chip, an output current setting module, a freewheeling module, a transformer, a second filtering and energy storage module, wherein the buck constant current driver chip does not need an external power supply capacitor. Compared with the prior art, the embodiments of the present application can quickly release electric energy in the first filtering and energy storage module and the second filtering and energy storage module without adding any load, thereby avoiding that a light-emitting element still maintains dim bright or flickering after the power is off, and also reducing the area and costs of a circuit.
Inventors:
ZHANG PINGWEI (CN)
Application Number:
PCT/CN2020/111260
Publication Date:
March 18, 2021
Filing Date:
August 26, 2020
Export Citation:
Assignee:
SUZHOU OPPLE LIGHTING CO LTD (CN)
OPPLE LIGHTING CO LTD (CN)
OPPLE LIGHTING CO LTD (CN)
International Classes:
H05B45/345
Domestic Patent References:
| WO2009004529A2 | 2009-01-08 |
Foreign References:
| CN210518944U | 2020-05-12 | |||
| CN102497098A | 2012-06-13 | |||
| CN108990212A | 2018-12-11 | |||
| KR101225106B1 | 2013-01-22 | |||
| CN102723880A | 2012-10-10 | |||
| KR20110136537A | 2011-12-21 |
Attorney, Agent or Firm:
COHORIZON INTELLECTUAL PROPERTY INC. (CN)
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