Digital power supply current control circuit
A technology of current control circuit and digital power supply, applied in control/regulation systems, electrical components, regulating electrical variables, etc., can solve the problems of high cost of digital power supply devices, burden of low-power digital power supply, occupation of microcontrollers, etc., to reduce Effects of power supply burden, avoidance of high-speed sampling, and circuit cost reduction
Active Publication Date: 2017-12-01
GENERAL LUMINAIRES SHANGHAI LTD
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Problems solved by technology
However, in the field of digital power supply technology, the measurement of the voltage drop value of the resistor requires high-speed sampling of the triangular wave, and high-speed operational amplifiers and high-speed analog-to-digital converters must be used, which will cause higher costs for digital power supply devices; at the same time, high-speed operational amplifiers and High-speed analog-to-digital converters also cause a large amount of microcontroller time, thus burdening the low-power digital power supply
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[0010] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0011] Such as figure 1 As shown, the present embodiment provides a digital power supply current control circuit, including an EMI filter rectifier 1, a voltage regulation circuit 2, a microcontroller (MCU) 3 and an optical coupling circuit; the EMI filter rectifier 1, the voltage regulation circuit 2 and the micro-controller are sequentiall...
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The invention discloses a digital power supply current control circuit, comprising an EMI filter rectifier (1), a voltage regulation circuit (2), a microcontroller (3) and an optical coupling circuit; the EMI filter rectifier (1), the voltage regulation circuit The circuit (2) and the microcontroller (3) are sequentially connected in circuit; the optical coupling circuit is connected to the EMI filter rectifier (1), the voltage regulation circuit (2) and the microcontroller (3) circuit respectively. The digital power supply current control circuit provided by the present invention does not need to measure the voltage drop value of the resistance, thereby avoiding the high-speed sampling of the triangular wave, thereby reducing the circuit cost, reducing the occupation time of the microcontroller, and reducing the power supply burden, and is more suitable for small power digital power supply equipment.
Description
technical field [0001] The invention relates to the field of electronic circuits, in particular to a digital power supply current control circuit. Background technique [0002] The peak value measurement of the power supply current signal is an important technical content of the power supply current control circuit. The analog power supply is usually realized by measuring the voltage drop value of the sampling resistor, that is, the ratio of the voltage drop value of the sampling resistor to the resistance value of the sampling resistor. However, in the field of digital power supply technology, the measurement of the voltage drop value of the resistor requires high-speed sampling of the triangular wave, and high-speed operational amplifiers and high-speed analog-to-digital converters must be used, which will result in higher costs for digital power supply devices; at the same time, high-speed operational amplifiers and High-speed analog-to-digital converters also cause a lar...
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IPC IPC(8): H02M3/335
Inventor 樊志坚王晓峰
Owner GENERAL LUMINAIRES SHANGHAI LTD