Cooling control circuit for peltier device

Abstract

A cooling control circuit for a Peltier device comprises: a switching device 3 ; an LC filter 4, 13 connecting between the switching device 3 and the Peltier device 1 , the LC filter 4, 13 smoothing an output from the switching device 3; an amplifier circuit 6 amplifying an output from the LC filter 4, 13 ; and a switching device control circuit IC configured to control an on-state and off-state of the switching device 3 based on a level of an output from the amplifier circuit 6 . The amplifier circuit 6 delays and amplifies the output from the LC filter 4, 13 so that a maximum level of the output from the LC filter 4, 13 reaches a level at which the switching device control circuit IC brings a switching device 3 into the off-state.

1 . A cooling control circuit for a Peltier device comprising:
 a switching device;   an LC filter connecting between the switching device and the Peltier device, the LC filter smoothing an output from the switching device;   an amplifier circuit amplifying an output from the LC filter; and   a switching device control circuit configured to control an on-state and off-state of the switching device based on a level of an output from the amplifier circuit;   wherein the amplifier circuit delays and amplifies the output from the LC filter so that a maximum level of the output from the LC filter reaches a level at which the switching device control circuit brings a switching device into the off-state.