A kind of outdoor electronic equipment and its system circuit

Abstract

The application discloses a system circuit, including a voltage regulator circuit, a main circuit and a constant power heating circuit; the constant power heating circuit includes a heating element and a first switch connected in series; the first end of the first switch is used as the input of the constant power heating circuit The terminal is connected to the input terminal of the voltage regulator circuit for receiving the wide voltage input signal; the voltage regulator circuit is used to stabilize the wide voltage input signal so as to supply power to the main circuit; the heating control output terminal of the main circuit is connected to the constant power heating The control end of the circuit is connected to output a heating control signal; the first switch switches based on the on-off control signal of the power switch in the voltage stabilizing circuit to ensure that the heating element performs constant power heating under the action of the heating control signal. The present application reduces the demand for output power of the voltage regulator circuit, thereby reducing the circuit cost and power loss of the voltage regulator circuit, and improving the product benefit and applicability. The present application also discloses an outdoor electronic device, which also has the above beneficial effects.

Description

technical field [0001] The present application relates to the technical field of circuit design, in particular to an outdoor electronic device and its system circuit. Background technique [0002] In order to ensure normal operation in a low temperature environment, outdoor electronic equipment such as outdoor monitoring equipment is often equipped with a constant power heating circuit. Generally, the constant power heating circuit includes a heating element and a switch for controlling the heating element to start and stop. The switching of the switch is controlled by the main circuit of the outdoor electronic device according to the requirements of the actual application scenario. In the prior art, both the constant power heating circuit and the main circuit are powered by a constant voltage output by a voltage stabilizing circuit after stabilizing a wide voltage input signal. In this way, when the heating power required by the system increases, the output power requireme...

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Problems solved by technology

In this way, when the heating power required by the system increases, the output power demand of the voltage stabilizing circuit also increases accordingly, so the relevant components in the voltage stabilizing circuit need to adopt higher specifications, which in turn increases the circuit cost and power consumption

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