Intelligent TEC temperature control circuit

Abstract

The invention discloses an intelligent TEC temperature control circuit which is characterized in that the intelligent TEC temperature control circuit comprises a single-chip microcomputer main control circuit, a temperature acquisition circuit, a current sampling circuit, a voltage control circuit, an H bridge and a switching power supply which are connected with a TEC, wherein the temperature acquisition circuit is used for acquiring the working temperature of the TEC; the current acquisition circuit is used for acquiring the working current of the TEC; the voltage control circuit is used for setting the voltage of the switching power supply; the switching power supply outputs the working voltage of the TEC to the H bridge. The H bridge is used for controlling the switching of heating or cooling of the TEC under the control of the single chip microcomputer main control circuit; the single-chip microcomputer master control circuit is used for analyzing and processing data acquired by the temperature acquisition circuit and the current acquisition circuit and controlling the output voltage of the voltage control circuit, the switching power supply and the H bridge to work. Accurate temperature control of the TEC is achieved, and the circuit is simple in structure, low in cost and wide in application range.

Description

technical field [0001] The invention relates to the field of avalanche diode temperature control, in particular to an intelligent TEC temperature control circuit. Background technique [0002] With the increasing demand for the development of photoelectric countermeasure systems, as an important part of it, the development of avalanche diode temperature control has gradually received attention [0003] As for the temperature control circuit, Maxim and Analog's dedicated control chip, or the PWM control method of the H bridge, are most commonly used at home and abroad. For example, Maxim's special control chips include MAX8521, Max1968, MAX1978, etc. These special chips are easy to use and have a short development cycle, but their maximum working voltage is 5.5V, and the output power is less than 15W. Another H-bridge PWM control method is to control the direction and magnitude of the current in the traditional way of controlling the motor. Compared with the hardware technic...

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Problems solved by technology

For example, Maxim's special control chips include MAX8521, Max1968, MAX1978, etc. These special chips are easy to use and have a short development cycle, but their maximum working voltage is 5.5V, and the output power is less than 15W.

Another H-bridge PWM control method is to control the direction and magnitude of the current in the traditional way of controlling the motor. Compared with the hardware technical requirements of the developer, and the circuit debugging is more complicated, the digital processing capability of the single-chip microcomputer is required. higher

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