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Low-voltage large-current DC-DC conversion system based on domestic chip EG7500

A DC-DC, conversion system technology, applied in output power conversion devices, control/regulation systems, conversion of DC power input to DC power output, etc., can solve the problem of large static operating current and low conversion efficiency of DC-DC converters And other issues

Pending Publication Date: 2021-04-20
扬州东博汽车配件有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the present invention provides a low-voltage and high-current DC-DC conversion system based on the domestic chip EG7500, which solves the problems of large static operating current and low conversion efficiency of the DC-DC converter

Method used

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  • Low-voltage large-current DC-DC conversion system based on domestic chip EG7500
  • Low-voltage large-current DC-DC conversion system based on domestic chip EG7500

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the present invention is further described:

[0022] as in the accompanying drawings Figure 1 to Figure 2 Shown, a kind of low-voltage high-current DC-DC conversion system based on the domestic chip EG7500 includes a power supply, the power supply is connected with a PWM chip, and the PWM chip is connected with a totem pole circuit;

[0023] Described PWM chip is also connected with control circuit, and described control circuit is connected with sampling circuit, and described sampling circuit is connected with output circuit;

[0024] The power supply, the totem pole circuit and the output circuit are connected through a MOS tube, and a resistor is also connected between the MOS tube, the sampling circuit and the output circuit.

[0025] Further, the PWM chip includes a chip U3, the first pin of the chip U3 is connected to a resistor R10, a resistor R14, a resistor R16 and a sliding resistor R18, and the resistor R10 i...

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Abstract

The invention belongs to the technical field of DCDC conversion systems, and particularly relates to a low-voltage large-current DCDC conversion system based on a domestic chip EG7500, which comprises a power supply, the power supply is connected with a PWM chip, and the PWM chip is connected with a totem pole circuit; the PWM chip is further connected with a control circuit, the control circuit is connected with a sampling circuit, and the sampling circuit is connected with an output circuit. The power supply, the totem pole circuit and the output circuit are connected through an MOS tube, and resistors are connected between the MOS tube and the sampling circuit and between the MOS tube and the output circuit. According to the invention, the problem of large quiescent working current of the DC-DC converter is solved; under the condition of controlling the cost, the efficiency of the DC-DC converter is much higher than that of a common DC-DC converter in the same voltage range on the market.

Description

technical field [0001] The invention belongs to the technical field of DC-DC conversion systems, and in particular relates to a low-voltage and high-current DC-DC conversion system based on a domestic chip EG7500. Background technique [0002] A DC-DC converter is a voltage converter that effectively outputs a fixed voltage after converting an input voltage. There are three types of DC-DC converters: step-up DC-DC converters, step-down DC-DC converters, and buck-boost DC-DC converters. Three types of controls are available depending on the requirements. The PWM controlled type has high efficiency and good output voltage ripple and noise. Even if the PFM control type is used for a long time, it has the advantage of low power consumption especially when the load is small. PWM / PFM conversion type implements PFM control when the load is small, and automatically switches to PWM control when the load is heavy. DC-DC converters are widely used in mobile phones, MP3, digital cam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156H02M1/08
Inventor 蒋永玉钱晓健宗逸帆
Owner 扬州东博汽车配件有限公司
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