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Boost and ldo hybrid converter with dual-loop control

a hybrid converter and low drop out technology, applied in the direction of electric variable regulation, process and machine control, instruments, etc., can solve the problems of imposing efficiency penalties on the entire design, single boost converters are not able to cover the entire voltage range, and impose silicon area and efficiency penalties

Active Publication Date: 2019-10-03
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The hybrid converter achieves efficient voltage regulation across a wide input range with reduced silicon area and improved efficiency by reusing components and implementing dual-loop control, enhancing bandwidth and stability.

Problems solved by technology

A single boost converter is not able to cover the entire voltage range in those scenarios.
The four switches needed for power delivery also impose penalties on silicon area and efficiency.
Further, the arrangement of boost converter 202 and LDO 204 in series imposes an efficiency penalty on the entire design.

Method used

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  • Boost and ldo hybrid converter with dual-loop control
  • Boost and ldo hybrid converter with dual-loop control
  • Boost and ldo hybrid converter with dual-loop control

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Embodiment Construction

[0027]The detailed description set forth below, in connection with the appended drawings, is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring such concepts.

[0028]FIG. 4 shows one implementation of a boost LDO hybrid converter. Boost LDO hybrid converter 400 includes an inductor 410, an n-type switch, such as an n-type metal oxide semiconductor device (nMOS) 420, a p-type switch, such as a p-type metal oxide semiconductor device (pMOS) 430, an output capacitor C_bst 440, and a controller 450. A first ter...

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Abstract

A boost and LDO hybrid converter with dual-loop control is disclosed. In some implementations, a hybrid converter includes an inductor having a first terminal to receive an input voltage and a second terminal; an n-type metal oxide semiconductor device (nMOS) having a drain coupled to the second terminal of the inductor; a p-type metal oxide semiconductor device (pMOS) having a gate, a drain, and a source, the source coupled to the second terminal of the inductor; an output capacitor having a first terminal coupled to the drain of the first pMOS; and a controller having a switch driver and a buffer, wherein the controller is configured to use the switch driver to drive the gate of the first pMOS in a boost mode and to use the buffer to drive the gate of the first pMOS in a low drop out (LDO) mode.

Description

FIELD OF DISCLOSURE[0001]Aspects of the present disclosure relate generally to voltage converters, and more particularly to a boost and low drop out (LDO) hybrid converter with dual-loop control.BACKGROUND[0002]In many electronic systems today, a boost converter is commonly used to convert a low input voltage to a higher output voltage. The boost converter is particularly useful in low power mobile applications and / or Internet-of-Things (IoT) applications, for example, charging circuit in Bluetooth headphone. There are many applications where the input voltage has a wide range and could either be lower or higher than the output voltage. A single boost converter is not able to cover the entire voltage range in those scenarios.[0003]Conventionally, several types of converters are developed to address the above problem. One such design is to use a non-inverting buck-boost converter to cover the entire range. FIG. 1 shows an example of a conventional non-inverting buck-boost converter. ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H02M3/158G05F1/26
CPCG05F1/26H02M3/1582G05F1/452H02M3/158G05F1/575G05F1/62Y02B70/10H02M1/0045H02M1/0032
Inventor SHI, CHUNLEILERDWORATAWEE, JONGRITPU, YU
Owner QUALCOMM INC
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