Bryan Kris, staff architect for Microchip’s DSC division, holds both a bachelor’s and a master’s degree in electrical engineering from Lehigh University, Bethlehem, Pa. Email address: bryan.kris@microchip.com
2 results found for Bryan Kris, displaying items 1 - 2
November 16, 2006[Design View / Design Solution] Use A DSC For Digital Current-Mode Control
Given: V = L di/dt I(t) = I(t0) + 1/L × ∫ V(t) dt Rearrange: (L/V) × (I(t) - I(t0)) = dt Using the formula: PWM on-time = (L/V) × 2 × (IDESIRED - ISTART) For most applications, the input voltage can't change very quickly-because of large input-filter capacitors. Therefore, you needn't calculate the time-consuming divide operation (L/V) for every execution of the control algorithm....
November 16, 2006[Design View / Design Solution] Digital Current-Mode Control Challenges Analog Counterparts
Digital control of switch-mode power supplies (SMPSs) is becoming practical thanks to the evolution of low-cost, high-performance devices with peripherals designed for power-conversion applications. Also, current-mode control is challenging voltage-mode techniques for SMPS digital designs. Combining digital control with current-mode topologies can bring higher performance than combinations of analog or voltage-mode approaches. Early SMPS designs used voltage-mode control. A...
