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Power management circuit and electronic device

A power management and circuit technology, applied in data processing power supply, electrical digital data processing, digital data processing components, etc., can solve the problems of high cost and large space occupied by high-voltage LDO circuits, so as to save the number of occupations and reduce production costs , saving and the effect of related circuits

Active Publication Date: 2019-07-12
HEFEI LCFC INFORMATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problem that the circuit that exits Dead Battery Mode uses a high-cost high-voltage LDO circuit as the core to perform a series of operations, and the problem that the high-voltage LDO circuit occupies a large space

Method used

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  • Power management circuit and electronic device
  • Power management circuit and electronic device
  • Power management circuit and electronic device

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no. 1 example

[0046] The first embodiment provided in this application is an embodiment of a power management circuit.

[0047] Combine below figure 1 The present embodiment is described in detail, wherein, figure 1 A schematic diagram of a power management circuit provided in an embodiment of the present application; figure 2 It is a schematic diagram of another power management circuit provided by the embodiment of the present application.

[0048] See figure 1 As shown, a power management circuit is applied to a motherboard with an NVDC architecture, including: a boost module, a conversion module and a charge controller.

[0049] The NVDC architecture, that is, narrow voltage DC charging, is a working mode architecture of the charger, which is used to limit the charging voltage value on the charger to protect the chemical substances inside the battery.

[0050] The boost module is configured to obtain a first voltage associated with a power adapter when the charge controller is in a...

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Abstract

The invention provides a power management circuit and an electronic device, and the power management circuit is applied to a mainboard with an NVDC architecture and comprises a boost module, a conversion module and a charging controller. The boost module is used for obtaining a first voltage associated with a power adapter when the charging controller is in a non-battery management mode, and boosting the first voltage to a second voltage. The power adapter supplies power through a USB Type C interface. The conversion module is used for generating an activation voltage according to the second voltage. The charging controller is used for entering a power supply management mode from the non-battery management mode according to the activation voltage. According to the circuit, the characteristics of a USB PD protocol are utilized to be matched with a power design architecture of an existing NVDC, a power management scheme applying USB PD chips similar to RTS545x, CCGx and the like is provided. A high-voltage LDO and related circuits are saved, the production cost is reduced, the occupied space of a circuit board is reduced, and the occupied number of interfaces is reduced.

Description

technical field [0001] This application relates to the field of computer power supply, in particular to power management circuits and electronic equipment. Background technique [0002] At present, many notebook computers are equipped with Type C / Thunderbolt interface. The power adapter of USB Type C interface can supply power to the system (20V). This interface requires the integrated charging controller (USB PDcontroller) on the motherboard. When the power adapter is not connected, the system is powered off and the battery is not installed, the USB PD controller will be in the non-battery management mode (Dead Battery Mode, referred to as DB Mode). When the power adapter is plugged in, the system must make the USB PD controller exit Dead first. Battery Mode, and after the USB PD controller communicates with the power adapter, the power adapter can output 20V to supply power to the system. [0003] The circuit that exits Dead Battery Mode must meet the 20V requirements of ...

Claims

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Application Information

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IPC IPC(8): G06F1/26
CPCG06F1/263
Inventor 王建友张亮亮杨磊柏春高耀
Owner HEFEI LCFC INFORMATION TECH
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