Semiconductor device, isolated dc-dc converter, ac-dc converter and vehicle

Abstract

A semiconductor device includes: a first external terminal configured such that an input voltage is capable of being applied to an external resistor, and the first external terminal is connectable to the external resistor; a first MOS transistor of an N-channel configured such that a drain is connected to the first external terminal, and the drain and a gate are short-circuited; a first resistor configured to be connected to a source of the first MOS transistor; a constant current source; a second MOS transistor of an N-channel configured such that a drain is connected to the constant current source, and the drain and a gate are short-circuited; a second resistor configured to be connected to a source of the second MOS transistor; and a comparator configured such that a drain voltage of the first MOS transistor and a drain voltage of the second MOS transistor are input.

Dependencies are inferred from the claim text.