EXAMPLES OF APPLICATIONS WITH THE PULSE WIDTH MODULATOR TL5001

Switched-mode techniques are used more and more nowadays for the design of power supplies. Switch mode power supplies have considerably higher efficiency when compared to designs employing linear regulators, and can be used for higher output powers. The rectified input voltage in a switching regulator is chopped by means of a switch. The LC network after the switch smoothes this voltage, resulting in a DC voltage at the output. This voltage is controlled by a regulator, such that the end result is a regulated output voltage.

As a result of the high switching frequencies which are involved, very small components can be used. This allows the construction of compact and low-cost power supplies. However, the high frequency switching signals also potentially create interference, and this can only be avoided with careful attention to the design and layout of the circuit.

The configurations of the components which are external to the regulator allow the design of various types of switching regulators. In the following section a step-down converter will be described, in which the output voltage is lower than the input.

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