Control circuit of PCstack amphibious cooling fan
By designing a micro fan control circuit in the PCstick, using temperature sensors and power control switches, an efficient and low-noise heat dissipation solution is achieved, solving the problem of internal heat dissipation of PCstick and improving system stability and performance.
Patent Information
- Application Number
- CN202421968849.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-14
AI Technical Summary
Due to its small size and limited internal space, it is difficult to install efficient heat dissipation equipment, resulting in low heat dissipation efficiency and high noise, which affects hardware performance and system stability.
Design a PCstick amphibious cooling fan control circuit, including a miniature fan, power control switch and temperature sensor, which senses the CPU temperature through the temperature sensor, controls the rotation of the fan to meet different load needs, and realizes a miniaturized and highly integrated cooling solution.
Achieve efficient heat dissipation in a limited space, reduce power consumption and noise, improve system reliability and stability, avoid degradation of hardware performance, and prevent system instability problems.
Smart Images
Figure CN223089595U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fan control, in particular to a PCstick amphibious heat dissipation fan control circuit. Background Technique
[0002] With the increasingly wide application of computer systems, future computers will coexist with high performance and miniaturization, networking will be ubiquitous, artificial intelligence and multimedia will be emphasized, and technology integration will create a new era. High-performance computing will help AI leap forward. These trends will bring more convenient and intelligent experiences to our lives. At the same time, these high-performance and miniaturized features also mean that the PCstick will face higher power consumption. How to solve the PC heat dissipation problem and fan noise is an important issue faced by each manufacturer. The PCstick is usually very small in size. In order to achieve miniaturization, the layout of electronic components inside the PCstick is very compact, and the internal space is extremely limited. Its length may be only a dozen centimeters, and the diameter is only a few centimeters. In such a limited space, heat-generating components such as processors, chip sets, and memories are closely arranged together, and heat is easily concentrated and accumulated, leaving very little space for the heat dissipation system. For example, there is enough space inside a traditional computer host to install large heat dissipation fans and heat sinks, and even complex air ducts can be designed to promote air circulation and heat dissipation. However, due to its small size, the PCstick cannot adopt a similar design, which greatly limits the size and volume of heat dissipation components (such as heat sinks, fans, etc.), making it difficult to install efficient heat dissipation devices, resulting in affected heat dissipation efficiency. And because of its portability and compactness, the PCstick has extremely high requirements for the size and integration of internal components. Therefore, it is an urgent need for the PCstick to design a heat dissipation fan control circuit with fewer components and stable performance. Content of the Utility Model
[0003] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide a PCstick amphibious heat dissipation fan control circuit, which has the effects of stable performance, fewer components, low cost, and compact structure, and also improves the reliability and stability of the pocket computer PCstick system, avoiding the degradation of hardware performance caused by high-temperature environments; moreover, when the PCstick operates at low power consumption, it can also stop the heat dissipation fan from rotating to reduce power consumption and noise.
[0004] To achieve the above object, the present utility model adopts the following technical solutions:
[0005] A PCstick amphibious heat dissipation fan control circuit includes a micro fan FAN, a power control switch U2, and a temperature sensor U1. The FAN, the power control switch U2, and the temperature sensor U1 are connected in sequence.
[0006] The ALERT pin of the temperature sensor U1 is connected to the EN pin of the power control switch U2. The VDD pin of the temperature sensor U1 is connected to the power supply 3V3_VDD. The HYST1 pin, GND1 pin, and GND2 pin of the temperature sensor U1 are all grounded.
[0007] The VIN pin of the power control switch U2 is connected to the power supply +V5P0A. The GND pin of the power control switch U2 is grounded. The VOUT pin of the power control switch U2 is connected to the micro fan FAN.
[0008] The 1# pin of the micro fan FAN is connected to the VOUT pin of the power control switch U2. The 2# pin, 3# pin, and 4# pin of the micro fan FAN are grounded. When the temperature sensor U1 senses that the ambient temperature around the CPU exceeds the threshold, the ALERT pin of the temperature sensor U1 sends a high-level signal to the EN pin of the power control switch U2, and the VOUT pin of the power control switch U2 outputs the FAN_VCC voltage, thereby driving the micro fan FAN to rotate.
[0009] As a preferred solution, the VDD pin of the temperature sensor U1 is grounded through the fourth filter capacitor SC4.
[0010] As a preferred solution, a resistor 3R1_0 is connected between the ALERT pin of the temperature sensor U1 and the EN pin of the power control switch U2.
[0011] As a preferred solution, the VIN pin of the power control switch U2 is grounded through the third filter capacitor SC3.
[0012] As a preferred solution, the VOUT pin of the power control switch U2 is grounded through the first filter capacitor SC1 and the second filter capacitor SC2 connected in parallel.
[0013] As a preferred solution, the model of the temperature sensor U1 is the fully integrated temperature switch GXT51x series chip.
[0014] As a preferred solution, the model of the power control switch U2 is the single-channel power distribution load switch chip TCP16288.
[0015] The above PCstick amphibious cooling fan control circuit has obvious advantages and beneficial effects compared with the prior art. Specifically, as can be seen from the above technical solution, it mainly controls the rotation of a micro fan FAN by setting a micro fan FAN, a power control switch U2, and a temperature sensor U1 connected in sequence. The temperature sensor U1 senses the temperature near the CPU. When the sensed temperature exceeds the threshold, a signal is sent to the power control switch U2 to control the rotation of the micro fan FAN. When the sensed temperature does not exceed the threshold, the micro fan FAN stops rotating. It has an extremely simple circuit, realizes the fan control function on a small-sized PCB, designs the cooling fan control circuit into a miniaturized and highly integrated form to adapt to the limited space of the PCstick computer stick. This design not only reduces the occupied space but also lowers the power consumption and improves the overall performance, having the effects of stable performance, fewer components, low cost, and compact structure. It also improves the reliability and stability of the pocket computer PCstick system, avoiding the problems that the hardware performance may decline due to high-temperature environment, affecting the overall operation speed and processing ability of the PCstick, and may cause system instability, such as blue screen, crashing, and other fault problems. Moreover, when the PCstick operates at low power consumption, the cooling fan can also stop rotating to reduce power consumption and noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a block diagram of an embodiment of the present invention;
[0017] Figure 2 is a circuit operation flowchart of an embodiment of the present invention;
[0018] Figure 3 is a circuit schematic diagram of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.
[0021] Please refer to Figures 1 to 3 , which shows a PC stick amphibious cooling fan control circuit provided by an embodiment of the present invention. It includes a micro fan FAN, a power control switch U2, and a temperature sensor U1. The FAN, the power control switch U2, and the temperature sensor U1 are connected in sequence.
[0022] The ALERT pin of the temperature sensor U1 is connected to the EN pin of the power control switch U2. The VDD pin of the temperature sensor U1 is connected to the power supply 3V3_VDD. The HYST1 pin, GND1 pin, and GND2 pin of the temperature sensor U1 are all grounded. The HYST1 pin of the temperature sensor U1 is a hysteresis input pin. When the HYST1 pin is connected to GND, the temperature is 2°C. When it is floating, the temperature is 5°C. When it is connected to VDD, the temperature is 10°C. The VDD pin is the power supply pin for the temperature sensor U1, and the ALERT pin is the over-temperature alarm signal pin. The temperature sensor U1 is arranged beside the CPU to sense the temperature of the CPU. When the temperature sensor U1 senses that the temperature exceeds the threshold, the ALERT pin sends out a high level.
[0023] The VIN pin of the power control switch U2 is connected to the power supply +V5P0A. The GND pin of the power control switch U2 is grounded. The VOUT pin of the power control switch U2 is connected to the micro fan FAN. The VOUT pin of the power control switch U2 is the power output terminal, which is used to provide power FAN_VCC support for the fan FAN. The EN pin is connected to the ALERT pin of the temperature sensor U1. When the EN pin of the power control switch U2 receives the high-level signal sent by the ALERT pin, the power control switch U2 is in the on state. At this time, the VOUT pin provides power for the fan FAN.
[0024] The 1# pin of the micro fan FAN is connected to the VOUT pin of the power control switch U2. The 2# pin, 3# pin, and 4# pin of the micro fan FAN are grounded. The 1# pin of the micro fan FAN is the power input pin, which controls the rotation of the fan after the power is turned on. When the temperature sensor U1 senses that the ambient temperature around the CPU exceeds the threshold, the ALERT pin of the temperature sensor U1 sends out a high-level signal to the EN pin of the power control switch U2. The VOUT pin of the power control switch U2 outputs the FAN_VCC voltage, thereby driving the micro fan FAN to rotate.
[0025] In this embodiment, the VDD pin of the temperature sensor U1 is grounded through the fourth filter capacitor SC4. The specification of the fourth filter capacitor SC4 is 2.2UF_6.3V_SMC0402, which provides a stable power input for the temperature sensor U1.
[0026] Further, a resistor 3R1_0 is connected between the ALERT pin of the temperature sensor U1 and the EN pin of the power control switch U2.
[0027] Further, the VIN pin of the power control switch U2 is grounded through a third filter capacitor SC3, and the specification of the third filter capacitor SC3 is 10UF_6.3V_SMC0402, providing a stable power input for the power control switch U2.
[0028] Further, the VOUT pin of the power control switch U2 is grounded through a parallel combination of a first filter capacitor SC1 and a second filter capacitor SC2. The first filter capacitor SC1 is a chip ceramic capacitor with a specification of 0.1UF_6.3V_SMC0402, and the second filter capacitor SC2 is a chip ceramic capacitor with a specification of 10UF_6.3V_SMC0402. The first filter capacitor SC1 and the second filter capacitor SC2 provide a stable power input for the micro fan FAN.
[0029] Further, the model of the temperature sensor U1 is a fully integrated temperature switch GXT51x series chip.
[0030] Further, the model of the power control switch U2 is a single-channel power distribution load switch chip TCP16288.
[0031] Working principle: Applied to the PCstick device on the Intel X86 platform, the temperature of the CPU is sensed by the temperature sensor. To ensure quick sensing of the temperature of the motherboard CPU, the temperature sensor needs to be placed close to the Intel X86 CPU and on the same side as the Intel X86 CPU. When the temperature sensor senses that the motherboard temperature is greater than 75°C, the power control switch is turned on, and the fan rotates for heat dissipation; when the temperature sensor module senses that the motherboard temperature is less than 75°C, the power control switch is turned off, the fan stops rotating, and heat dissipation is achieved through the structural components of the whole machine, thus achieving a silent effect. When the customer is using scenarios with high computing power and high performance, etc., the overall power consumption of the machine is high and the heat generation is large, with the fan heat dissipation as the main method and the structural heat dissipation as the auxiliary method; when the customer is using scenarios with low computing power and handling daily document transactions, etc., the structural components of the whole machine are used for heat dissipation mainly, the fan does not rotate, and it operates without noise.
[0032] Compared with the prior art, the above PCstick amphibious cooling fan control circuit has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly controls the rotation of the micro fan FAN by setting a micro fan FAN, a power control switch U2, and a temperature sensor U1 connected in sequence. The temperature sensor U1 senses the temperature near the CPU. When the sensed temperature exceeds the threshold, a signal is sent to the power control switch U2 to control the rotation of the micro fan FAN. When the sensed temperature does not exceed the threshold, the micro fan FAN stops rotating. It has an extremely simple circuit, realizes the fan control function on a small-sized PCB, and designs the cooling fan control circuit into a miniaturized and highly integrated form to adapt to the limited space of the PCstick computer stick. This design not only reduces the occupied space, but also reduces power consumption and improves the overall performance, with the effects of stable performance, fewer components, low cost, and compact structure. It also improves the reliability and stability of the pocket computer PCstick system, avoiding the problems that the hardware performance may decline due to a high-temperature environment, affecting the overall running speed and processing ability of the PCstick, and may cause system instability, such as blue screen, crash, and other fault problems. Moreover, when the PCstick operates at low power, the cooling fan can also stop rotating to reduce power consumption and noise.
[0033] It should be noted that the present invention is not limited to the above embodiments. According to the creative spirit of the present invention, those skilled in the art can also make other changes, and these changes made based on the creative spirit of the present invention should be included within the scope of protection required by the present invention.
Claims
1. A PCstick amphibious cooling fan control circuit, characterized in that, It includes a micro fan FAN, a power control switch U2, and a temperature sensor U1. The FAN, the power control switch U2, and the temperature sensor U1 are connected in sequence. The ALERT pin of the temperature sensor U1 is connected to the EN pin of the power control switch U2. The VDD pin of the temperature sensor U1 is connected to the power supply 3V3_VDD. The HYST1 pin, GND1 pin, and GND2 pin of the temperature sensor U1 are all grounded. The VIN pin of the power control switch U2 is connected to the power supply +V5P0A. The GND pin of the power control switch U2 is grounded. The VOUT pin of the power control switch U2 is connected to the micro fan FAN. The 1# pin of the micro fan FAN is connected to the VOUT pin of the power control switch U2. The 2# pin, 3# pin, and 4# pin of the micro fan FAN are grounded. When the temperature sensor U1 senses that the ambient temperature around the CPU exceeds the threshold, the ALERT pin of the temperature sensor U1 sends a high-level signal to the EN pin of the power control switch U2, and the VOUT pin of the power control switch U2 then outputs the FAN_VCC voltage, thereby driving the micro fan FAN to rotate.
2. The PCstick amphibious heat dissipation fan control circuit according to claim 1, wherein The VDD pin of the temperature sensor U1 is grounded through the fourth filter capacitor SC4.
3. The PCstick amphibious cooling fan control circuit according to claim 1, characterized in that, A resistor 3R1_0 is connected between the ALERT pin of the temperature sensor U1 and the EN pin of the power control switch U2.
4. The PCstick amphibious cooling fan control circuit according to claim 1, wherein, The VIN pin of the power control switch U2 is grounded through the third filter capacitor SC3.
5. The PCstick amphibious heat dissipation fan control circuit according to claim 1, wherein The VOUT pin of the power control switch U2 is grounded through the first filter capacitor SC1 and the second filter capacitor SC2 connected in parallel.
6. The PCstick amphibious cooling fan control circuit according to claim 1, characterized in that, The model of the temperature sensor U1 is a fully integrated temperature switch GXT51x series chip.
7. The PCstick amphibious cooling fan control circuit according to claim 1, characterized in that The model of the power control switch U2 is a single-channel power distribution load switch chip TCP16288.