Inductor current emulation circuit for switching power supply

Details Inductor current emulation circuit for switching power supply Inductor current emulation circuit for switching power supply

2005-04-12

2005-04-12

Riley, Shawn (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S224000

Reexamination Certificate

active

06879136

ABSTRACT:
An inductor current emulation circuit for a switched-mode power supply (SMPS) which is arranged such that its inductor current (IL) goes to zero at least once per switching cycle. The emulation circuit includes an RC integrator connected in parallel across the inductor, and a zero reset switch (ZRS) connected in parallel across the integrator's capacitor. A control circuit operates the ZRS such that it is opened when ILis non-zero, and is closed for a least a portion of the time during each switching cycle when ILis zero such that the capacitor is substantially discharged. In this way, the ZRS essentially recalibrates the emulation circuit when ILis zero. When so arranged, the voltage (VC) across the capacitor emulates IL. The invention may be implemented with either a discontinuous-inductor-current SMPS, or a continuous-bipolar-inductor-current SMPS.

REFERENCES:
patent: 5982160 (1999-11-01), Walters et al.
patent: 6833690 (2004-12-01), Walters et al.

Affiliated with

Also associated with

Rating

Inductor current emulation circuit for switching power supply does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Inductor current emulation circuit for switching power supply, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inductor current emulation circuit for switching power supply will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3436257