Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-06-12
2007-06-12
Riley, Shawn (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
Reexamination Certificate
active
11491022
ABSTRACT:
A sliding-mode switching power supply (24) having N phases (28) and a method of operating the power supply (24) are provided. N switches (30) are coupled to a bipolar power source (22), with each switch (30) effecting one phase (28). An inductance (32) is coupled to each switch (30), and a capacitance (36) is coupled to the inductances (32). A load (26) is coupled across the capacitance (36). A monitor circuit (38) is coupled to the inductances (32) and the capacitance (36) and configured to monitor currents (IL) through the inductances (32) and/or a voltage (VC) across the capacitance (36). A sliding-surface generator (78) is coupled to the monitor circuit (38) and generates a single sliding surface (σ) for all phases (28). A constant-frequency control (104) forms a variable window (Δσ) for the sliding surface (σ). A switching circuit (138) switches the switches (30) at a switching frequency (fS) determined by the variable window (Δσ). The constant-frequency control (104) adjusts the variable window (Δσ) to maintain the switching frequency (fS) substantially constant.
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Intersil America's Inc.
Meschkow & Gresham PLC
Riley Shawn
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