Low-voltage and high-current control circuit

Abstract

The invention relates to the technical field of a high-current control circuit and specifically relates to a low-voltage and high-current control circuit. The circuit comprises a direct current boost module, an MOS transistor control module, a power module and a direct current boost control module. The direct current boost control module, the direct current boost module, the MOS transistor control module and the MOS transistor power module are connected in sequence. The direct current boost module is a direct current voltage doubling circuit composed of a diode D1, the diode D2, a capacitor C2, the capacitor C2, a switch tube Q1 and the switch tube Q2. The switch tube Q1 and the switch tube Q2 are switched repeatedly and circularly according to certain frequency, and the stable voltage output can be realized, thereby driving an MOS transistor. A voltage 3.7V of a secondary lithium battery multiplies by 2 to obtain 7.4V, in this way, the 7.4 is greater than a threshold value of a general MOS transistor starting voltage 4V, the problem that the single secondary lithium battery cannot switch on the general MOS transistor due to low voltage is solved, the circuit is simple and reliable, is high in operability and low in cost and has high creativity.

Description

technical field [0001] The invention relates to the technical field of high-current control circuits, in particular to a low-voltage high-current control circuit. Background technique [0002] With the enhancement of people's awareness of environmental protection, the development of lithium battery technology and the enhancement of people's awareness of energy conservation and emission reduction, lithium batteries have been widely used in various industries, especially some portable mobile devices are more and more widely used, and the performance is particularly prominent- --Small size, sufficient energy, environmental protection, light weight, easy to use, etc., unlike lead-acid batteries, which are bulky, pollute the environment, and are inconvenient to use. And the current charging can also use mobile phone chargers, solar charging, etc. These mobile devices now require a power supply voltage generally lower than 5V and a large operating current. Using ordinary MOS tube...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a low-voltage high-current control circuit, which solves the problem that the single-cell secondary lithium battery has low voltage and cannot be driven to open the ordinary MOS tube, and is simple, reliable, strong in operability, and low in cost

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