Title:
ＣＬＬ共振回路搭載の２段式マルチチャンネルＬＥＤドライバ
Document Type and Number:
Japanese Patent JP6530214
Kind Code:
B2
Abstract:
In a two-stage power converter providing voltage regulation in a first stage, zero voltage switching (ZVS) is provided in switches in an unregulated, constant frequency second stage of a two-stage power converter by an inductor of a CLL resonant circuit connected in parallel with both a series connection of an external inductor and a primary winding of one or more transformers connected in series and an output of the switching circuit so that the output capacitances of the switches can be charged and discharged, respectively, by current in the parallel-connected inductor and independently of current in the magnetizing inductance of the transformer. Therefore, the magnetizing inductance of the transformer can be made sufficiently large to balance currents delivered to respective loads as is particularly desirable for driving a plurality of unbalanced LED strings independently of the value of the parallel-connected inductor which is desirably small.
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Inventors:
Shwebin Chen
Dao Chen Fan
Shan Li
Fred Sea Lee
Dao Chen Fan
Shan Li
Fred Sea Lee
Application Number:
JP2015063470A
Publication Date:
June 12, 2019
Filing Date:
March 25, 2015
Export Citation:
Assignee:
Virginia Tech Intellectual Property Incorporated
International Classes:
H02M3/28; H05B44/00; H05B37/02
Domestic Patent References:
| JP2179267A | ||||
| JP11136940A |
Foreign References:
| US20110316430 | ||||
| US20110291574 |
Attorney, Agent or Firm:
Hiromori Arai