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A pfm modulation circuit based on data control

A modulation circuit and data control technology, applied in the DC-DC circuit and AC-DC fields, can solve problems such as poor compatibility, high procurement costs of CPLD and FPGA chips, and difficulty in updating and maintaining engineering software, and achieve the effect of reducing costs

Active Publication Date: 2022-03-18
MORNSUN GUANGZHOU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the birth of digital switching power supply for many years, its main solutions are still based on typical solutions such as DSP, ARM+CPLD, and ARM+FPGA. Apart from the above main solutions, there are almost no other digital power supply solutions.
[0004] The DSP solution is relatively mature, and the cost is acceptable. Due to its unique software development environment and complex register configuration, its popularity is limited to a certain extent.
In addition, due to the singleness of the solution, the digital switching power supply of the DSP solution will inevitably become homogeneous in terms of cost, performance and core technology over time, and it is highly dependent on the DSP chip.
[0005] ARM+CPLD and ARM+FPGA solutions have become the mainstream solutions in high-power digital power supply systems in recent years, but the procurement costs of CPLD and FPGA chips are very high, even exceeding the main control chip (ARM)
CPLD and FPGA chips and DSP chips also have a unique software development environment and complex register configuration. The engineering software needs to be divided into two parts. In addition, the compatibility between the versions of the software development environment is relatively poor, which makes it difficult to update and maintain the engineering software.

Method used

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  • A pfm modulation circuit based on data control
  • A pfm modulation circuit based on data control
  • A pfm modulation circuit based on data control

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0027] figure 1 It is a functional block diagram of the first embodiment of the present invention. In order to facilitate the description of the working principle of the present invention, the external circuit connected to it during the application of the present invention is also drawn. The PFM modulation circuit of the first embodiment of the present invention includes a logic controller, an oscillator, a latch, a first register, a second register, a third register, a fourth register, a fifth register, a first counter, a second counter, Data channel 1, data channel 2, data channel 3, data channel 4, first gate circuit, second gate circuit, and the external circuit connected with the present invention include data interface, protection unit circuit, current sampling and comparison, and power supply circuit.

[0028] The connection relationship is: (1) the first register is connected to the logic controller through data channel two, (2) the logic controller is connected to the...

no. 2 example

[0045] figure 2 It is a functional block diagram of the second embodiment of the present invention, and the contents added on the basis of the first embodiment are: the sixth register, the seventh register, the eighth register, the third counter, the fourth counter, the third gate circuit, and the fourth gate circuit, the fifth gate circuit, and the sixth gate circuit.

[0046] The connection relationship is: (1) the first register is connected to the logic controller and the sixth register through data channel two, (2) the logic controller is connected to the second register through data channel three, (3) the logic controller is connected through data channel four It is connected with the fifth register, (4) the first register is connected with the peripheral data interface through data channel one, (5) the logic controller is connected with the first register through the control signal, (6) the logic controller is connected with the second register through the control sign...

no. 3 example

[0065] The difference between the third embodiment of the present invention and the second embodiment is that the control method is different.

[0066] The connection relationship is: the same as the second embodiment.

[0067] The working principle of data transmission is the same as that of the second embodiment.

[0068] The working principle of pulse modulation is the same as that of the second embodiment.

[0069] The working principle of pulse modulation is: through the description of the working principle of data transmission and the working principle of pulse modulation, the content of the present invention can generate complementary pulses with an output duty cycle of less than 50% and a dead zone, and the pulse period is controlled by the data sent by the external control unit .

[0070] The present invention can also be figure 2 Oscillator settings and synchronous pulse input pins input synchronous pulse signals to the internal oscillation. When the second regis...

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Abstract

The invention provides a PFM modulation circuit based on data control. The external control unit can transmit data to the logic controller through the data interface, and then accurately distribute the data to the fifth register and the second register under the control of the logic controller. In the second register, under the control of the logic controller, the first counter and the second counter start counting, convert the data in the fifth register and the second register into corresponding state level signals, and complete the pulse through the latch modulation, and finally output a complementary pulse with a duty cycle of 50%. The present invention omits CPLD and FPGA chips, and only needs ARM chip + the PFM modulation circuit of the present invention to realize, can be integrated to form a unit circuit, and can also be integrated and mass-produced, effectively reducing the cost.

Description

technical field [0001] The invention relates to AC-DC and DC-DC circuits, in particular to a PFM modulation circuit of a digital switching power supply mainly controlled by a digital programmable chip. Background technique [0002] Since the birth of digital switching power supply, digital switching power supply has been widely used in various fields due to its unique advantages, such as charging and inverter power supply in peak shifting power system and solar and wind power generation fields. Its main characteristics are The control system is complex and the installed capacity is super large. Digital switching power supply has irreplaceable advantages in these fields. The inverter power supply with digital power technology can track the phase of the power grid in real time, reducing the impact on the power grid caused by switching power supply, and realizing safer power supply switching. The charging system of solar and wind power stations uses digital power technology to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K5/00
CPCH03K5/00006
Inventor 田新凯程志勇潘成章
Owner MORNSUN GUANGZHOU SCI & TECH