| 摘要 |
A step down voltage converter for automotive electrical power supply networks reduces voltage down at least one order, for example, 42V down to 3V or lower, for the supply of microcontrollers and semiconductors. A preferred embodiment employs a tapped-inductor and three discrete components. The use of tapped-inductor is well-known and the design gives an extra-degree of freedom by the insertion of the winding ratio of the tapped-inductor into the transfer function of the Watkins-Johnson converter. It also permits the duty cycle to be adjusted to a value at which the efficiency of the converter is improved. The converter can be slightly modified and used as a multiple output converter while employing few components, diminishing the weight, size, cost and complexity of a system.
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