Small computer device and standby power saving circuit therefor

Abstract

The utility model provides a kind of small computer equipment and standby energy-saving circuit thereof, when small computer equipment is started, low level signal is exported to the control end of the voltage setting circuit by the SUPER-I / O controller, so that the adapter can provide normal supply voltage to the mainboard of the small computer equipment by the PD controller, when shutdown, high level signal is exported to the control end of the voltage setting circuit by the SUPER-I / O controller, so that the adapter can provide hibernate voltage to the mainboard of the small computer equipment by the PD controller.

Description

Technical Field

[0001] This utility model relates to the field of power electronics, and in particular to a small computer device and its standby energy-saving circuit. Background Technology

[0002] In the existing MINI PC (small computer device) technology field, when using the PD power supply solution, EC control can be used to reduce the standby power consumption of the whole machine to below 1W by turning off the power supply of the discrete graphics card and external devices and maintaining only the memory refresh current. However, this solution requires more control lines and more complex EC logic to be arranged on the existing PCB layout. Changing the EC model requires changing the corresponding code logic and routing logic.

[0003] Another approach is to use a SUPER-I / O controller (a high-performance, high-reliability input / output chip widely used in computer motherboards, expansion cards, and embedded systems) to reduce power consumption by controlling the power supply chip to enter the EUP state. However, in practical applications, limitations of the motherboard design and adapter often result in excessively high standby power consumption. Existing PD controller ICs typically output a fixed voltage and cannot adjust the output voltage according to the system's operating state. This causes the system to maintain a relatively high voltage output even in standby mode, leading to high standby power consumption.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] This utility model discloses a small computer device and its standby power-saving circuit, which aims to solve the problem of high standby power consumption when the small computer device enters hibernation.

[0006] The first embodiment of this utility model provides a standby power-saving circuit for a small computer device, including: a PD controller, a SUPER-I / O controller, and a voltage setting circuit;

[0007] The input terminal of the PD controller is used to connect to the adapter, the output terminal of the PD controller is electrically connected to the power supply terminal of the motherboard of the small computer device, the control terminal of the voltage setting circuit is electrically connected to the SUPER-I / O controller, and the voltage setting pin of the PD controller is grounded through the voltage setting circuit.

[0008] The voltage setting circuit is configured to adjust the grounding resistance of the voltage setting pin of the PD controller when the device is powered on and off.

[0009] Preferably, the voltage setting circuit includes: a first resistor, a second resistor, and a MOSFET;

[0010] The voltage setting pin of the PD controller is electrically connected to the first end of the first resistor, the second end of the first resistor is grounded through the second resistor, the gate of the MOSFET is electrically connected to the SUPER-I / O controller, and the drain and source of the MOSFET are connected across the two ends of the second resistor.

[0011] The SUPER-I / O controller is configured to pull the gate (G) of the MOSFET low when the small computer device is powered on, and to pull the gate (G) of the MOSFET high when the small computer device is powered off.

[0012] Preferably, the PD controller is model HUSB239.

[0013] Preferably, the adapter is an adapter configured with a Type-C interface.

[0014] Preferably, the resistance of the first resistor is 6.04K and the resistance of the second resistor is 13K.

[0015] The second embodiment of this utility model provides a small computer device, characterized in that it includes a standby energy-saving circuit for a small computer device as described in any one of the above claims.

[0016] Based on the present invention, a small computer device and its standby power-saving circuit are provided. When the small computer device is powered on, the SUPER-I / O controller outputs a low-level signal to the control terminal of the voltage setting circuit, so that the adapter can provide normal power supply voltage to the motherboard of the small computer device through the PD controller. When the device is powered off, the SUPER-I / O controller outputs a high-level signal to the control terminal of the voltage setting circuit, so that the adapter can provide sleep voltage to the motherboard of the small computer device through the PD controller. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a standby energy-saving circuit module for a small computer device provided by this utility model;

[0018] Figure 2 This utility model provides a schematic diagram of a PD controller and a voltage setting circuit;

[0019] Figure 3 This is a schematic diagram of the Type-C interface provided by this utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0022] This utility model discloses a small computer device and its standby power-saving circuit, which aims to solve the problem of high standby power consumption when the small computer device enters hibernation.

[0023] Please see Figure 1 The first embodiment of this utility model provides a standby power-saving circuit for a small computer device, including: a PD controller 2, a SUPER-I / O controller 5, and a voltage setting circuit 4;

[0024] The input terminal of the PD controller 2 is used to connect to the adapter 1, the output terminal of the PD controller 2 is electrically connected to the power supply terminal of the motherboard 3 of the small computer device, the control terminal of the voltage setting circuit 4 is electrically connected to the SUPER-I / O controller 5, and the voltage setting pin of the PD controller 2 is grounded through the voltage setting circuit 4.

[0025] The voltage setting circuit 4 is configured to adjust the grounding resistance of the voltage setting pin of the PD controller 2 when the device is powered on and off.

[0026] It should be noted that the PD controller 2 can use, but is not limited to, the HUSB239 chip. This chip is a highly integrated USB Type-C power delivery controller that supports multiple output voltage configurations. The input of the PD controller 2 is connected to the adapter 1 via a Type-C interface, and its output is directly electrically connected to the VBUS power supply terminal of the small computer device's motherboard, providing operating power to the entire system.

[0027] Please see Figure 2 and Figure 3The HUSB239 chip integrates a complete USB PD protocol stack, supports the USB PD 3.0 specification, and can seamlessly interface with mainstream USB PD adapters on the market, ensuring power supply compatibility and stability. The HUSB239 supports multiple output voltage levels, including 5V, 9V, 12V, 15V, and 20V, meeting the power supply needs of small computer devices under different operating conditions. In particular, the HUSB239 can precisely control the output voltage through external impedance configuration on its voltage setting pin (SDA / SNK_VSET, located at pin 9 of the chip). In the circuit design, pin 16 (VBAT) of the HUSB239 is directly connected to the VBUS pin of the Type-C interface to receive power input from the adapter and, after processing by the internal power management circuitry, supply power to the motherboard of the small computer device from the VBUS output.

[0028] In terms of circuit structure, the voltage setting pin (SDA / SNK_VSET#) of the PD controller 2HUSB239 is directly electrically connected to the first terminal of the first resistor R1. The first resistor R1 is a precision resistor with a resistance of 6.04K ohms. The second terminal of the first resistor R1 is grounded through the second resistor R2, forming a series voltage divider circuit. The second resistor R2 has a resistance of 13K ohms. When these two resistors are connected in series, their total resistance is approximately 19.04K ohms, close to the 19.1K ohms standard value required for the HUSB239 chip to set a 20V output.

[0029] MOSFET Q1 is an N-channel enhancement-mode MOSFET (of course, in other implementations, a P-channel enhancement-mode MOSFET can also be used, with corresponding changes to the circuit connection; this is not specifically limited here, but all these solutions are within the protection scope of this utility model), featuring low on-resistance, fast switching speed, and high reliability. The gate (G) of MOSFET Q1 is directly connected to the GPIO output of SUPER-I / O controller 5 on the motherboard, receiving control signals from SUPER-I / O controller 5. The drain (D) and source (S) of MOSFET Q1 are connected in parallel across the second resistor R2, effectively short-circuiting the first resistor R1 when MOSFET Q1 is turned on.

[0030] The SUPER-I / O controller 5 controls the gate level of MOSFET Q1 through its GPIO interface to dynamically adjust the voltage setting circuit 4. When the small computer device is powered on, the system requires a higher voltage to meet the power consumption requirements for normal operation. At this time, the SUPER-I / O controller 5 pulls the gate of MOSFET Q1 low (usually 0V), making MOSFET Q1 in the off state. In this case, MOSFET Q1 is equivalent to an open circuit, which does not affect the series voltage divider effect of the first resistor R1 and the second resistor R2. The voltage setting pin of the PD controller 2 is grounded through the series connection of R1 and R2, with a total resistance of approximately 19.04K ohms. Therefore, the PD controller 2 outputs a 20V voltage.

[0031] When the small computer device enters a power-off or standby state, in order to reduce system power consumption, the SUPER-I / O controller 5 pulls the gate of MOSFET Q1 high (typically 3.3V or 5V, depending on the operating voltage of the SUPER-I / O controller 5), making MOSFET Q1 fully conduct. At this time, the drain and source of MOSFET Q1 present an extremely low resistance (typically in the milliohm range), effectively short-circuiting the second resistor R2. Therefore, the voltage setting pin of the PD controller 2 is actually grounded only through the first resistor R1, with a resistance of 6.04K ohms, causing the PD controller 2 to automatically reduce the output voltage to 12V.

[0032] This voltage drop from 20V to 12V, while keeping the current essentially constant, can significantly reduce the standby power consumption of small computer devices because power is proportional to voltage (P=UI). Actual tests show that small computer devices using this design can reduce standby power consumption from the traditional 0.6-0.8W to 0.2-0.3W, achieving a power reduction of approximately 60%.

[0033] The second embodiment of this utility model provides a small computer device, characterized in that it includes a standby energy-saving circuit for a small computer device as described in any one of the above claims.

[0034] Based on the small computer device and its standby power-saving circuit provided by this utility model, when the small computer device is powered on, the SUPER-I / O controller 5 outputs a low-level signal to the control terminal of the voltage setting circuit 4, so that the adapter 1 can provide normal power supply voltage to the motherboard 3 of the small computer device through the PD controller 2. When powered off, the SUPER-I / O controller 5 outputs a high-level signal to the control terminal of the voltage setting circuit 4, so that the adapter 1 can provide sleep voltage to the motherboard 3 of the small computer device through the PD controller 2.

[0035] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions that fall within the scope of this utility model's concept are protected by this utility model.

Claims

1. A standby power-saving circuit for a small computer device, characterized in that, include: PD controller, SUPER-I / O controller, and voltage setting circuit; The input terminal of the PD controller is used to connect to the adapter, the output terminal of the PD controller is electrically connected to the power supply terminal of the motherboard of the small computer device, the control terminal of the voltage setting circuit is electrically connected to the SUPER-I / O controller, and the voltage setting pin of the PD controller is grounded through the voltage setting circuit. The voltage setting circuit is configured to adjust the grounding resistance of the voltage setting pin of the PD controller when the device is powered on and off.

2. The standby energy-saving circuit for a small computer device according to claim 1, characterized in that, The voltage setting circuit includes: a first resistor, a second resistor, and a MOSFET; The voltage setting pin of the PD controller is electrically connected to the first end of the first resistor, the second end of the first resistor is grounded through the second resistor, the gate of the MOSFET is electrically connected to the SUPER-I / O controller, and the drain and source of the MOSFET are connected across the two ends of the second resistor. The SUPER-I / O controller is configured to pull the gate (G) of the MOSFET low when the small computer device is powered on, and to pull the gate (G) of the MOSFET high when the small computer device is powered off.

3. The standby energy-saving circuit for a small computer device according to claim 1, characterized in that, The model number of the PD controller is HUSB239.

4. The standby energy-saving circuit for a small computer device according to claim 1, characterized in that, The adapter is an adapter configured with a Type-C interface.

5. The standby energy-saving circuit for a small computer device according to claim 2, characterized in that, The first resistor has a resistance of 6.04KΩ and the second resistor has a resistance of 13KΩ.

6. A small computer device, characterized in that, Includes a standby power-saving circuit for a small computer device as described in any one of claims 1 to 5.

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