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Ultra-low voltage self-starting control circuit for DC-DC converter

A DC-DC, ultra-low voltage technology, applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve CMOS process compatibility issues, increase costs, etc., to save power consumption, Effects of cost reduction and safety assurance

Active Publication Date: 2021-03-26
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this will bring about the compatibility problem of CMOS process and increase the cost
Also, this structure is only suitable for low input voltage applications

Method used

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  • Ultra-low voltage self-starting control circuit for DC-DC converter
  • Ultra-low voltage self-starting control circuit for DC-DC converter
  • Ultra-low voltage self-starting control circuit for DC-DC converter

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Embodiment Construction

[0023] The present invention is described in further detail below in conjunction with accompanying drawing:

[0024] refer to figure 1 , the ultra-low voltage self-starting control circuit for a DC-DC converter according to the present invention includes a first signal input terminal VIN, a second signal input terminal VOUT, a self-starting circuit 2, a mode control circuit 4, a reference circuit 3, The signal input terminal, the PFM control loop 5 and the main power switch 1, wherein the first signal input terminal VIN is connected to the input terminal of the self-starting circuit 2 and one end of the main power switch 1, and the other end of the main power switch 1 is connected to the PFM The input end of the control loop 5 is connected, the output end of the PFM control loop 5 is connected with the control end of the main power switch 1, the self-starting circuit 2 is connected with the mode control circuit 4, and the output end of the mode control circuit 4 is connected w...

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PUM

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Abstract

The invention discloses an ultra-low voltage self-starting control circuit for a DC-DC converter. The ultra-low voltage self-starting control circuit comprises a first signal input end, a second signal input end, a self-starting circuit, a mode control circuit, a reference circuit, a PFM control loop and a main power switch, wherein the first signal input end is connected with an input end of theself-starting circuit and one end of the main power switch; the other end of the main power switch is connected with an input end of the PFM control loop, an output end of the PFM control loop is connected with a control end of the main power switch, the self-starting circuit is connected with the mode control circuit, an output end of the mode control circuit is connected with a control end of the PFM control loop, and an output end of the self-starting circuit is connected with an input end of the PFM control loop and the reference circuit. The ultra-low voltage self-starting control circuitcan achieve stable output and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of power supply management and relates to an ultra-low voltage self-starting control circuit for a DC-DC converter. Background technique [0002] In energy harvesting systems, DC-DC converters are often used to provide a stable power supply voltage for subsequent loads. However, due to the limitation of the threshold voltage of the MOS transistor, when the input voltage is lower than the threshold voltage of the MOS transistor, it is difficult for the DC-DC converter to realize the self-starting function. Especially when the input range of the DC-DC converter is wide, the self-starting circuit must use a MOS transistor with a high withstand voltage value, and its threshold voltage will further increase, which brings more difficulties to the realization of the self-starting circuit. [0003] In recent years, there are mainly two implementation methods for the DC-DC converter self-starting circuit: [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/36H02M1/08H02M3/156
CPCH02M1/36H02M1/08H02M3/156Y02B70/10
Inventor 范世全谢鹰袁晨曦白开全耿莉
Owner XI AN JIAOTONG UNIV
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