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Low voltage drop rectifier

A rectifier circuit and current technology, applied to semiconductor devices, AC power input conversion to DC power output, output power conversion devices, etc., can solve problems such as low efficiency power loss in single-line systems

Active Publication Date: 2020-05-26
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such single-wire systems can be inefficient and prone to significant power loss

Method used

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Embodiment Construction

[0060] Generally, a low dropout rectifier is provided which is capable of providing rectified power to devices of a single-wire communication system. The low voltage rectifier is configured to efficiently generate power from virtually any switching signal. A comparator controls a pass transistor arranged in parallel with the rectifier diode. When the output voltage of the rectifier is higher than the input voltage, the comparator immediately turns off the pass transistor, preventing reverse current and improving efficiency.

[0061] figure 1 A prior art rectifier circuit 100 is shown in simplified schematic form. The circuit includes input and output terminals labeled IN and OUT, respectively. Diode 102 has an anode terminal connected at the IN node and a cathode terminal connected at the OUT node. The first P-channel transistor 104 is connected in parallel with the diode 102 . A first current electrode of transistor 104 is connected at the IN node and a second current el...

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Abstract

A low voltage drop rectifier is provided. The rectifier includes a diode having a first terminal coupled at an input node and a second terminal coupled at an output node. A first transistor having a first current electrode is coupled at the input node and a second current electrode is coupled at the output node. A comparator having a first input is coupled at the input node, a second input is coupled at the output node, and an output is coupled to a control electrode of the first transistor. A bias circuit is coupled to the comparator circuit and is configured to generate a bias current in thecomparator.

Description

technical field [0001] The present disclosure relates generally to electronic circuits, and more specifically, to low dropout rectifiers. Background technique [0002] Today, many electronic products such as mobile devices and other small devices incorporate single-wire communication systems to negotiate commands between master and slave devices. These devices and / or single-wire communication cables need to be self-powered, especially if the target device has a dead battery. However, such single-wire systems can be inefficient and subject to significant power loss. Therefore, there is a need for a single-wire system that improves efficiency and reduces losses. Contents of the invention [0003] According to a first aspect of the present invention, a rectifier circuit is provided, comprising: [0004] a diode having a first end coupled at the input node and a second end coupled at the output node; [0005] a first transistor having a first current electrode coupled at t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217
CPCH02M7/217H03K17/063H03K2017/066H03K2217/0054H02M1/083
Inventor 耿学阳马旦·莫汉·丽迪·维穆拉阿尔马·安德森
Owner NXP BV