Claude Abraham is a staff engineer at Bendix Commercial Vehicle Systems, Elyria, Ohio. He holds a BSEE from Youngstown State University, Ohio, and is a PhD candidate in EE at Case Western Reserve University, Cleveland, Ohio. Email address: Claude.Abraham@bendix.com
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October 11, 2007[Ideas For Design] Constant-Current Source Creates Slope-Compensation Ramp In SMPS
A switched-mode power supply (SMPS) employing peak current-mode control (PCMC) requires a ramp signal to slope-compensate the inner (current) control loop. Slope compensation stabilizes the current loop, which would otherwise exhibit subharmonic oscillation when operating in continuous conduction mode with a duty factor near or above 50%. Also, the current that should be controlled is the average value of inductor current, which is directly related to load ...
