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Power management circuit and control method and system thereof

A technology for power management and circuit management, applied to electrical components, output power conversion devices, etc., can solve problems affecting system stability, circuit board interference, and high manufacturing costs, so as to improve system stability, save manufacturing costs, reduce Die area effect

Active Publication Date: 2021-11-30
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since BB_PMIC separately sets three control pins with different control logics, the chip area of ​​BB_PMIC is relatively large, and the manufacturing cost is relatively high; and these control signals are system key signals, which are easy to be manipulated on the circuit board. Other signal interference directly affects system stability

Method used

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  • Power management circuit and control method and system thereof
  • Power management circuit and control method and system thereof
  • Power management circuit and control method and system thereof

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Embodiment Construction

[0027] In order to understand the characteristics and technical contents of the embodiments of the present application in more detail, the implementation of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application, and are not intended to limit the present application.

[0029] In the following description, references to "some embodiments" describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or a different sub...

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Abstract

The embodiment of the invention discloses a power management circuit and a control method and system thereof. The power management circuit comprises a first power management chip and a reserved resistor position, wherein the first power management chip comprises a state machine module, a first control pin and a first power pin, and two ends of the reserved resistor position are respectively connected with the first control pin and the first power pin; the state machine module is used for triggering a power-on function or a reset function of the first power management chip through the first control pin under the condition that a first resistor is mounted at the reserved resistor position; or is used for triggering the power-on function or the reset function of the first power management chip through an external control module and the first control pin under the condition that the first resistor is not mounted at the reserved resistor position. Due to the fact that three pins in the first power management chip are combined into one control pin, the chip area is reduced, and the manufacturing cost is saved; and moreover, the risk that key signals are interfered is reduced, and the system stability is improved.

Description

technical field [0001] The present application relates to the technical field of power management, in particular to a power management circuit and its control method and system. Background technique [0002] Baseband IC (BBIC) refers to the chip used to synthesize the baseband signal to be transmitted or to decode the received baseband signal. It mainly completes the information processing function of the terminal equipment. [0003] At present, BBIC generally uses a dedicated baseband power management IC (BB_PMIC) to power and control it. In order to implement multiple control methods on the BB_PMIC, the control pins of the BB_PMIC will at least include three independent power key signal pins (PON), enable signal pins (EN), and reset signal pins (RESETIN). control pins, and their control logic varies. However, since BB_PMIC separately sets three control pins with different control logics, the chip area of ​​BB_PMIC is relatively large, and the manufacturing cost is relati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00
CPCH02M1/0003H02M1/0038H02M1/0012Y02D10/00
Inventor 周洁
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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