Control circuit of PCstack back splint cooling fan

Abstract

The utility model relates to a control circuit of a PCstack back splint cooling fan, which comprises a TYPE-A connector J1, a TYPE-C connector J2, an overvoltage and overcurrent protection chip U1, a toggle switch SW1 and a fan connecting terminal FAN1, a D-pin of the TYPE-A connector J1 is connected with a DN1 pin of the TYPE-C connector J2, a D + pin of the TYPE-A connector J1 is connected with a DP1 pin of the TYPE-C connector J2, and a D-pin of the TYPE-C connector J2 is connected with a DP2 pin of the TYPE-C connector J2. A VBUS3 pin and a VBUS4 pin of the TYPE-C connector J2 are both connected with an IN pin of the overvoltage and overcurrent protection chip U1, a VBUS1 pin, a VBUS2 pin, a VBUS3 pin and a VBUS4 pin of the TYPE-C connector J2 are all connected with an input power supply + VDC5V, a GND pin of the overvoltage and overcurrent protection chip U1 is grounded, the toggle switch SW1 is a three-gear toggle switch, an OUT pin of the overvoltage and overcurrent protection chip U1 is connected with an A pin and a C pin of the toggle switch SW1, a B pin of the toggle switch SW1 is connected with a fan connecting terminal FAN1, and a C pin of the fan connecting terminal FAN1 is connected with a power supply + VDC5V. A pin D is suspended, and a VBUS pin of the TYPE-A connector J1 and a pin A of the toggle switch SW1 are connected with a power supply + VBUS5V.

Description

Technical Field

[0001] The utility model relates to the technical field of back-clip cooling fans, in particular to a control circuit of a PCstick back-clip cooling fan. Background Art

[0002] With the increasing use of computer systems, future computers will be both high-performance and compact. These trends will bring more convenient and intelligent experiences to our lives. While PCsticks offer high performance and miniaturization, this also means higher power consumption and greater heat generation. Traditional passive cooling often limits CPU performance to control the temperature, which in turn restricts the user experience. This has led to the development of clip-on cooling fans for PCsticks. Current clip-on cooling fans are powered by the PCstick's USB Type-A port. However, unstable voltage supply from the PCstick's USB port can easily affect or even damage the fan. Utility Model Content

[0003] In view of this, the present invention addresses the deficiencies in the prior art, and its main purpose is to provide a control circuit for a PCstick back clip cooling fan, which can avoid affecting the back clip cooling fan when the power supply voltage of the PCstick's USB interface is unstable.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A control circuit for a PCstick back clip cooling fan includes a TYPE-A connector J1, a TYPE-C connector J2, an overvoltage and overcurrent protection chip U1, a toggle switch SW1, and a fan connection terminal FAN1.

[0006] The D-pin of the TYPE-A connector J1 is connected to the DN1 pin and the DN2 pin of the TYPE-C connector J2, and the D+ pin of the TYPE-A connector J1 is connected to the DP1 pin and the DP2 pin of the TYPE-C connector J2.

[0007] The VBUS3 and VBUS4 pins of the TYPE-C connector J2 are connected to the IN pin of the overvoltage and overcurrent protection chip U1, and the VBUS1, VBUS2, VBUS3 and VBUS4 pins of the TYPE-C connector J2 are connected to the input power supply +VDC_5V.

[0008] The GND pin of the overvoltage and overcurrent protection chip U1 is grounded, the toggle switch SW1 is a three-speed toggle switch, the OUT pin of the overvoltage and overcurrent protection chip U1 is connected to the A pin and C pin of the toggle switch SW1, the B pin of the toggle switch SW1 is connected to the fan connection terminal FAN1, the D pin is floating, the G1 pin, the G2 pin, the G3 pin and the G4 pin are all grounded, and the VBUS pin of the TYPE-A connector J1 and the A pin of the toggle switch SW1 are both connected to the power supply +VBUS_5V.

[0009] As a preferred solution, the VBUS end of the TYPE-A connector J1 is grounded via a filter capacitor C1.

[0010] As a preferred solution, the D- terminal of the TYPE-A connector J1 is connected to the second ESD device CR2, and the D+ terminal of the TYPE-A connector J1 is connected to the first ESD device CR1.

[0011] As a preferred solution, the model of the overvoltage and overcurrent protection chip U1 is FM5330.

[0012] As a preferred solution, the IN pin of the overvoltage and overcurrent protection chip U1 is connected to the fourth filter capacitor C4 and the fifth filter capacitor C5, and the other ends of the fourth filter capacitor C4 and the fifth filter capacitor C5 are grounded.

[0013] As a preferred solution, the OUT pin of the overvoltage and overcurrent protection chip U1 is connected to the second filter capacitor C2 and the third filter capacitor C3, and the other ends of the second filter capacitor C2 and the third filter capacitor C3 are grounded.

[0014] As a preferred solution, the A pin of the toggle switch SW1 is connected to the power indicator light CR3, and the other pin of the power indicator light CR3 is grounded.

[0015] As a preferred solution, a voltage divider resistor R1 is connected in series between the A pin of the toggle switch SW1 and the OUT pin of the overvoltage and overcurrent protection chip U1, and a voltage divider resistor R3 is connected in series between the C pin of the toggle switch SW1 and the OUT pin of the overvoltage and overcurrent protection chip U1.

[0016] As a preferred solution, the fan connection terminal FAN1 is a 2PIN_1.25 pitch fan connection terminal.

[0017] The control circuit of the PCstick back clip cooling fan has obvious advantages and beneficial effects compared with the existing technology. Specifically, it can be seen from the above technical solution that it mainly has the following beneficial effects:

[0018] 1. Connect the Type-C port of the cooling back clip fan to the USB type-A port of the PCstick, and pull out the USB2.0 data line signal from the Type-C port to expand an additional Type-A USB2.0 standard interface;

[0019] 2. Add an overvoltage protection circuit to the Type-C port output power channel to prevent the PCstick's USB interface power supply voltage from being unstable, which could affect the back clip's cooling fan. It also prevents the input voltage from being too high and damaging the connected Type-A USB 2.0 device.

[0020] 3. Set a three-speed toggle switch on the output power channel of the Type-C port to control the micro fan on and off, and to achieve full speed with 100% duty cycle and half speed with 50% duty cycle for heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a module block diagram of an embodiment of the present utility model.

[0022] Figure 2 It is a circuit operation flow chart of an embodiment of the present utility model.

[0023] Figure 3 It is a circuit diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0026] See also Figures 1 to 3, showing a control circuit of a PCstick back clip cooling fan provided by an embodiment of the present invention, including a TYPE-A connector J1, a TYPE-C connector J2, an overvoltage and overcurrent protection chip U1, a toggle switch SW1 and a fan connection terminal FAN1, the TYPE-C connector J2 is used to connect to the USB interface of the PCstick, the fan connection terminal FAN1 is used to connect to a micro fan, the D- pin of the TYPE-A connector J1 is connected to the DN1 pin and the DN2 pin of the TYPE-C connector J2, the D+ pin of the TYPE-A connector J1 is connected to the DP1 pin and the DP2 pin of the TYPE-C connector J2, the GND pin, the SGND1 pin, the SGND2 pin, the SGND3 pin and the SGND4 pin of the TYPE-A connector J1 are all grounded; the VBUS3 pin and the VBUS4 pin of the TYPE-C connector J2 are both connected to the overvoltage and overcurrent protection chip U1 The IN pin of the overvoltage and overcurrent protection chip U1 is connected, the VBUS1, VBUS2, VBUS3 and VBUS4 pins of the TYPE-C connector J2 are all connected to the input power supply +VDC_5V, the CC1, CC2, SBU1 and SBU2 pins of the TYPE-C connector J2 are floating, and the GND1, GND2, GND3, GND4, GND5, GND6, GND13 and GND14 pins are all grounded; the GND pin of the overvoltage and overcurrent protection chip U1 is grounded, the toggle switch SW1 is a three-speed toggle switch, the OUT pin of the overvoltage and overcurrent protection chip U1 is connected to the A and C pins of the toggle switch SW1, the B pin of the toggle switch SW1 is connected to the fan connection terminal FAN1, the D pin is floating, the G1, G2, G3 and G4 pins are all grounded, and the VBUS pin of the TYPE-A connector J1 and the A pin of the toggle switch SW1 are both connected to the power supply +VBUS_5V.

[0027] In this embodiment, the VBUS end of the TYPE-A connector J1 is grounded through the filter capacitor C1 for filtering and energy storage. The specification of the filter capacitor C1 is 10UF_6.3V_SMC0603.

[0028] Furthermore, the D-end of the TYPE-A connector J1 is connected to the second ESD device CR2, and the D+ end of the TYPE-A connector J1 is connected to the first ESD device CR1; the other ends of the first ESD device CR1 and the second ESD device CR2 are both grounded, which is used for electrostatic protection of the signal.

[0029] Furthermore, the model of the overvoltage and overcurrent protection chip U1 is FM5330.

[0030] Furthermore, the IN pin of the overvoltage and overcurrent protection chip U1 is connected to the fourth filter capacitor C4 and the fifth filter capacitor C5, the other ends of the fourth filter capacitor C4 and the fifth filter capacitor C5 are grounded, the fourth filter capacitor C4 and the fifth filter capacitor C5 are connected in parallel, and the specification of the fourth filter capacitor C4 is 10UF_6.3V_SMC0603, and the specification of the fifth filter capacitor C5 is 1UF_6.3V_SMC0402.

[0031] Furthermore, the OUT pin of the overvoltage and overcurrent protection chip U1 is connected to the second filter capacitor C2 and the third filter capacitor C3, and the other ends of the second filter capacitor C2 and the third filter capacitor C3 are grounded; the second filter capacitor C2 and the third filter capacitor C3 are connected in parallel, and the specification of the second filter capacitor C2 is 10UF_6.3V_SMC0603, and the specification of the third filter capacitor C3 is 1UF_6.3V_SMC0402.

[0032] Furthermore, pin A of the toggle switch SW1 is connected to the power indicator light CR3, and the other pin of the power indicator light CR3 is grounded; the power indicator light CR3 includes a light-emitting diode and a voltage-dividing resistor R4, pin A of the toggle switch SW1 is connected to the positive electrode of the light-emitting diode, the negative electrode of the light-emitting diode is connected to the voltage-dividing resistor R4, and the other end of the voltage-dividing resistor R4 is grounded.

[0033] Furthermore, a voltage divider resistor R1 is connected in series between the A pin of the toggle switch SW1 and the OUT pin of the overvoltage and overcurrent protection chip U1 , and a voltage divider resistor R3 is connected in series between the C pin of the toggle switch SW1 and the OUT pin of the overvoltage and overcurrent protection chip U1 .

[0034] Furthermore, the fan connection terminal FAN1 is a 2PIN_1.25 pitch fan connection terminal.

[0035] In other embodiments, the VBUS3 pin of the TYPE-C connector J2 and the A pin of the toggle switch SW1 are connected via a voltage divider resistor R2. When the overvoltage and overcurrent protection chip U1 is not needed, the TYPE-C connector J2 and the toggle switch SW1 can be directly connected via the voltage divider resistor R2 to reduce the cost of the overall circuit.

[0036] On the Intel X86 platform, it can be understood through the circuit operation flow chart that the Type-C port of the cooling back clip fan is connected to the USB type-A port of the PCstick through a connecting wire, and the USB2.0 data line signal is pulled out from the Type-C port to expand the additional Type-A USB2.0 standard interface; an overvoltage protection circuit is added to the output power channel of the Type-C port to avoid the unstable power supply voltage of the USB interface of the PCstick, which affects the back clip cooling fan, and also avoids the damage of the connected Type-A USB2.0 device due to excessive input voltage; a three-speed toggle switch is set on the output power channel of the Type-C port to control the opening and closing of the micro fan, and to achieve 100% duty cycle full speed and 50% duty cycle half speed for cooling air dissipation.

[0037] It should be noted that the present invention is not limited to the above-mentioned embodiments. According to the creative spirit of the present invention, those skilled in the art can also make other changes. These changes made according to the creative spirit of the present invention should be included in the scope of protection required by the present invention.

Claims

1. A control circuit for a PCstick back clip cooling fan, characterized in that: Includes TYPE-A connector J1, TYPE-C connector J2, overvoltage and overcurrent protection chip U1, toggle switch SW1 and fan connection terminal FAN1; The D-pin of the TYPE-A connector J1 is connected to the DN1 pin and the DN2 pin of the TYPE-C connector J2, and the D+ pin of the TYPE-A connector J1 is connected to the DP1 pin and the DP2 pin of the TYPE-C connector J2. The VBUS3 and VBUS4 pins of the TYPE-C connector J2 are connected to the IN pin of the overvoltage and overcurrent protection chip U1, and the VBUS1, VBUS2, VBUS3 and VBUS4 pins of the TYPE-C connector J2 are connected to the input power supply +VDC_5V. The GND pin of the overvoltage and overcurrent protection chip U1 is grounded, the toggle switch SW1 is a three-speed toggle switch, the OUT pin of the overvoltage and overcurrent protection chip U1 is connected to the A pin and C pin of the toggle switch SW1, the B pin of the toggle switch SW1 is connected to the fan connection terminal FAN1, the D pin of the toggle switch SW1 is suspended, the G1 pin, G2 pin, G3 pin and G4 pin of the toggle switch SW1 are all grounded, and the VBUS pin of the TYPE-A connector J1 and the A pin of the toggle switch SW1 are both connected to the power supply +VBUS_5V.

2. The control circuit of the PCstick back clip cooling fan according to claim 1, characterized in that: The VBUS end of the TYPE-A connector J1 is grounded via a filter capacitor C1.

3. The control circuit of the PCstick back clip cooling fan according to claim 1, characterized in that: The D- terminal of the TYPE-A connector J1 is connected to the second ESD device CR2 , and the D+ terminal of the TYPE-A connector J1 is connected to the first ESD device CR1 .

4. The control circuit of the PCstick back clip cooling fan according to claim 1, characterized in that: The model of the overvoltage and overcurrent protection chip U1 is FM5330.

5. The control circuit of the PCstick back clip cooling fan according to claim 1, characterized in that: The IN pin of the overvoltage and overcurrent protection chip U1 is connected to the fourth filter capacitor C4 and the fifth filter capacitor C5, and the other ends of the fourth filter capacitor C4 and the fifth filter capacitor C5 are grounded.

6. The control circuit of the PCstick back clip cooling fan according to claim 1, characterized in that: The OUT pin of the overvoltage and overcurrent protection chip U1 is connected to the second filter capacitor C2 and the third filter capacitor C3, and the other ends of the second filter capacitor C2 and the third filter capacitor C3 are grounded.

7. The control circuit of the PCstick back clip cooling fan according to claim 1, characterized in that: Pin A of the toggle switch SW1 is connected to the power indicator light CR3, and the other pin of the power indicator light CR3 is grounded.

8. The control circuit of the PCstick back clip cooling fan as claimed in claim 1, characterized in that: A voltage divider resistor R1 is connected in series between the A pin of the toggle switch SW1 and the OUT pin of the overvoltage and overcurrent protection chip U1 , and a voltage divider resistor R3 is connected in series between the C pin of the toggle switch SW1 and the OUT pin of the overvoltage and overcurrent protection chip U1 .

9. The control circuit of the PCstick back clip cooling fan as claimed in claim 1, characterized in that: The fan connection terminal FAN1 is a 2PIN_1.25 pitch fan connection terminal.

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