Title:
TWO TERMINAL DRIVE OF BIPOLAR JUNCTION TRANSISTOR (BJT) FOR SWITCH-MODE OPERATION OF A LIGHT EMITTING DIODE (LED)-BASED BULB
Document Type and Number:
WIPO Patent Application WO/2015/017317
Kind Code:
A3
Abstract:
A bipolar junction transistor (BJT) may be used in a power stage DC-to-DC converter, such as for LED-based light bulbs. The BJT may be switched on and off from a controller coupled to two terminals of the BJT. Through the two terminals, the control IC may dynamically adjust a reverse recovery time period of the BJT. The reverse recovery time period may be adjusted by changing an amount of base charge that accumulates on the BJT. Additional, the reverse recovery may be controlled through the use of a reverse base current source applied to the BJT after beginning switching off the BJT.
Inventors:
MARU SIDDHARTH (US)
MELANSON JOHN L (US)
SINGH RAHUL (US)
KING ERIC (US)
RENGACHARI THIRUMALAI (US)
ZANBAGHI RAMIN (US)
DUTTA ARNAB KUMAR (US)
MELANSON JOHN L (US)
SINGH RAHUL (US)
KING ERIC (US)
RENGACHARI THIRUMALAI (US)
ZANBAGHI RAMIN (US)
DUTTA ARNAB KUMAR (US)
Application Number:
PCT/US2014/048395
Publication Date:
November 26, 2015
Filing Date:
July 28, 2014
Export Citation:
Assignee:
CIRRUS LOGIC INC (US)
International Classes:
H05B44/00
Foreign References:
| US20100202165A1 | 2010-08-12 | |||
| US20100157636A1 | 2010-06-24 | |||
| US20110234123A1 | 2011-09-29 | |||
| US20120293214A1 | 2012-11-22 |
Attorney, Agent or Firm:
SMITH, Darren et al. (98 San Jacinto BoulevardSuite 110, Austin TX, US)
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