| Publisher | National Semiconductor | ||
|---|---|---|---|
| Format | 1.3MB PDF | Date added | 01 Aug 2007 |
| Topics | Software Engineering, Embedded Emulation Tools | ||
| Downloads | 13 | ||
Current-mode operation: An ideal current-mode converter is only dependent on the dc or average inductor current. The inner current loop turns the inductor into a voltage-controlled current source, effectively removing the inductor from the outer voltage control loop at dc and low frequency. The modulator gain is dependent on the effective slope of the ramp presented to the modulating comparator input. Each operating mode will have a unique characteristic equation for the modulator gain. The requirement for slope compensation is dependent on the relationship of the average current to the value of current at the time when the sample is taken. For fixed-frequency operation, if the sampled current were equal to the average current, there would be no requirement for slope compensation.
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