Current sensing circuit for DC/DC buck converters

Details Current sensing circuit for DC/DC buck converters Current sensing circuit for DC/DC buck converters

2006-01-31

2006-01-31

Nguyen, Matthew V. (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

C323S282000

Reexamination Certificate

active

06992473

ABSTRACT:
A circuit and a related method to sense the inductor current of CD/DC buck converters have been achieved. The inductor current is sensed by generation of a voltage drop across a fully integrated sense resistor. The voltage drop is proportional to the inductor current in the pass device by supplying a fraction of the inductor current out of a source-follower, which matches to the pass device. The source of said source-follower is connected to a sense-resistor that is connected to the same supply as the pass device. The current, which is needed to generate the voltage drop, is fed back into the inductor current minimizing therefore the efficiency loss. Mirroring, amplification and offset correction of the voltage drop across the sense-resistor is performed by using a single matching pair of source-follower, which is supplied by a current tracking the internal reference voltage and the process variations of the resistors.

REFERENCES:
patent: 4465967 (1984-08-01), Tokunaga et al.
patent: 5134355 (1992-07-01), Hastings
patent: 5378998 (1995-01-01), Davies
patent: 6184660 (2001-02-01), Hatular
patent: 6246220 (2001-06-01), Isham et al.
patent: 6377034 (2002-04-01), Ivanov
patent: 6381159 (2002-04-01), Oknaian et al.
patent: 6452369 (2002-09-01), Lang
patent: 6600362 (2003-07-01), Gavrila
patent: 6700365 (2004-03-01), Isham et al.
patent: 6876190 (2005-04-01), Tai et al.
patent: 2003/0218455 (2003-11-01), Tai et al.
patent: 3405599 (1985-08-01), None
patent: WO 03/052433 (2003-06-01), None

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