DC/DC converter and electronic apparatus

摘要

A voltage converter includes a switching element, a control unit and a generation unit. The switching element controls an output voltage of the voltage converter. The control unit is configured to control the switching element based on a voltage signal. The generation unit is configured to generate the voltage signal by serially connecting a resistance element and one or more detection units having a resistor corresponding to a temperature and dividing a reference voltage by the detection units and the resistance element. The generation unit is arranged so as to be able to detect temperature change of a plurality of components which is overheat-protected.

主权项

1. A voltage converter comprising:
a switching element for controlling an output voltage of the voltage converter; a control unit configured to control the switching element based on a voltage signal; and a generation unit configured to generate the voltage signal by serially connecting a resistance element and a detection unit having a resistor corresponding to a temperature, wherein the generation unit includes a plurality of detecting units and a switching unit for selecting one of the plurality of detecting units, wherein the detection unit is arranged so as to be able to detect a temperature change of a plurality of components which is overheat-protected, the plurality of detecting units include a first detecting unit arranged close to the switching element and a second detecting unit arranged close to a rectification circuit, and the switching unit selects the first detecting unit in a case where the output voltage is a predetermined value or more, and selects the second detecting unit in a case where the output voltage is smaller than the predetermined value.