Boost circuit device

Abstract

The utility model relates to a boosted circuit device, which comprises a primary boosted circuit, a secondary boosted circuit, a metal oxide semiconductor (MOS) tube protection circuit and a boosted control branch, an MOS tube protection circuit is electrically connected between the output end of the first-stage boost circuit and the input end of the second-stage boost circuit, the MOS tube protection circuit is used for protecting the second-stage boost circuit, and a boost control branch is further arranged between the first-stage boost circuit and the second-stage boost circuit. The boost control branch is used for skipping a boost loop of the second-stage boost circuit to directly connect the first-stage boost circuit with a filter loop of the second-stage boost circuit. According to the utility model, the first-stage boost circuit and the second-stage boost circuit which are connected in series are arranged, so that the boost effect of the whole circuit is obviously enhanced; and the output voltage can meet the application scene with higher voltage requirements.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology, specifically to a boost circuit device. Background Technology

[0002] A boost converter circuit uses electronic components such as boost diodes and boost capacitors to superimpose the capacitor's discharge voltage and the power supply voltage, thereby increasing the voltage. Some circuits can increase the voltage by several times the power supply voltage. Boost converter circuits are frequently used in various electronic products; for example, drones often require boost converter circuits to boost the voltage to 5V. However, the output voltage of existing boost converter circuits is usually fixed and difficult to adjust. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a boost circuit device to address the above-mentioned shortcomings.

[0004] To solve the above technical problems, the present invention adopts the following technical solution:

[0005] A boost circuit device includes a first-stage boost circuit, a second-stage boost circuit, a MOSFET protection circuit, and a boost control branch. The first-stage boost circuit and the second-stage boost circuit are connected in series to enhance the boost effect. The output terminal of the first-stage boost circuit and the input terminal of the second-stage boost circuit are electrically connected to the MOSFET protection circuit, which protects the second-stage boost circuit. A boost control branch is also provided between the first-stage boost circuit and the second-stage boost circuit. The boost control branch is used to bypass the boost circuit of the second-stage boost circuit and directly connect the first-stage boost circuit to the filter circuit of the second-stage boost circuit.

[0006] Furthermore, the first-stage boost circuit includes a power supply, a first inductor, a first fuse, a first transistor, a first diode, and a first capacitor. The positive terminal of the power supply is connected in series with the first fuse, the first inductor, and the first diode. The negative terminal of the power supply is electrically connected to the first transistor connected in parallel with the first inductor. The collector of the first transistor is electrically connected to the output terminal of the first inductor. The negative terminal of the power supply is electrically connected to the first capacitor connected in parallel with the first transistor. The other end of the first capacitor is electrically connected to the output terminal of the first diode. The first-stage boost circuit is used to boost the output voltage of the first-stage boost circuit through the first inductor and the first capacitor. The positive output terminal of the first-stage boost circuit is electrically connected to the input terminal of the MOSFET protection circuit, and the negative output terminal of the first-stage boost circuit is grounded.

[0007] Furthermore, the positive input terminal of the secondary boost circuit is electrically connected to the output terminal of the MOSFET protection circuit, and the negative input terminal is electrically connected to the negative output terminal of the primary boost circuit. The secondary boost circuit includes a second inductor, a first resistor, a second transistor, a second diode, a second capacitor, and a third capacitor. The positive terminal of the secondary boost circuit is connected in series with the second inductor, the second diode, and the first resistor. The second transistor is connected in parallel with the second inductor. The two ends of the second capacitor are electrically connected to the negative terminal of the second transistor and the input terminal of the first resistor, respectively. The two ends of the third capacitor are electrically connected to the negative terminal of the second capacitor and the output terminal of the first resistor, respectively. The second capacitor, the second inductor, the second transistor, and the second diode form the boost circuit of the secondary boost circuit. The second capacitor and the third capacitor are connected in parallel and together with the first resistor form the filter circuit of the secondary boost circuit.

[0008] Furthermore, the boost control branch includes a circuit breaker and a second fuse, and the output terminal of the boost control branch is electrically connected to the output terminal of the second diode.

[0009] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0010] This invention significantly enhances the voltage boosting effect of the entire circuit by setting up a series-connected first-stage and second-stage boost circuits, enabling the output voltage to meet the needs of applications requiring higher voltages. A MOSFET protection circuit is placed between the first-stage and second-stage boost circuits, effectively protecting the second-stage boost circuit from abnormal conditions such as current surges or overloads, thus improving the circuit's reliability and stability. By incorporating a boost control branch, this circuit device has the ability to bypass the boost loop of the second-stage boost circuit and directly connect the filter loops of the first-stage and second-stage boost circuits. This design allows users to flexibly choose the boost mode according to actual needs; they can choose the full boost path to obtain a higher output voltage, or choose to boost voltage only through the first-stage boost circuit to simplify the circuit structure or reduce energy consumption.

[0011] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the circuit connection structure of this utility model (external control circuit omitted).

[0013] The attached diagram lists the components represented by each number as follows:

[0014] 1. First-stage boost circuit; 101. Power supply; 102. First inductor; 103. First fuse; 104. First transistor; 105. First diode; 106. First capacitor; 2. Second-stage boost circuit; 201. Second inductor; 202. First resistor; 203. Second transistor; 204. Second diode; 205. Second capacitor; 206. Third capacitor; 3. MOSFET protection circuit; 4. Boost control branch; 401. Circuit breaker; 402. Second fuse. Detailed Implementation

[0015] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0016] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] like Figure 1 As shown, a boost circuit device includes a first-stage boost circuit 1, a second-stage boost circuit 2, a MOSFET protection circuit 3, and a boost control branch 4. The first-stage boost circuit 1 and the second-stage boost circuit 2 are connected in series to enhance the boost effect of the circuit. The output terminal of the first-stage boost circuit 1 and the input terminal of the second-stage boost circuit 2 are electrically connected to the MOSFET protection circuit 3, which is used to protect the second-stage boost circuit 2. A boost control branch 4 is also provided between the first-stage boost circuit 1 and the second-stage boost circuit 2. The boost control branch 4 is used to bypass the boost circuit of the second-stage boost circuit 2 and directly connect the first-stage boost circuit 1 to the filter circuit of the second-stage boost circuit 2.

[0018] In one embodiment, the first-stage boost circuit 1 includes a power supply 101, a first inductor 102, a first fuse 103, a first transistor 104, a first diode 105, and a first capacitor 106. The positive terminal of the power supply 101 is connected in series with the first fuse 103, the first inductor 102, and the first diode 105. The negative terminal of the power supply 101 is electrically connected to the first transistor 104 connected in parallel with the first inductor 102. The collector of the first transistor 104 is electrically connected to the output terminal of the first inductor 102. The negative terminal of the power supply 101 is electrically connected to the first capacitor 106 connected in parallel with the first transistor 104. The other end of the first capacitor 106 is electrically connected to the output terminal of the first diode 105. The first-stage boost circuit 1 is used to boost the output voltage of the first-stage boost circuit 1 through the first inductor 102 and the first capacitor 106. The positive output terminal of the first-stage boost circuit 1 is electrically connected to the input terminal of the MOSFET protection circuit 3, and the negative output terminal of the first-stage boost circuit 1 is grounded.

[0019] In one implementation, the positive input terminal of the secondary boost circuit 2 is electrically connected to the output terminal of the MOSFET protection circuit 3, and the negative input terminal is electrically connected to the negative output terminal of the primary boost circuit 1. The secondary boost circuit 2 includes a second inductor 201, a first resistor 202, a second transistor 203, a second diode 204, a second capacitor 205, and a third capacitor 206. The positive terminal of the secondary boost circuit 2 is connected in series with the second inductor 201, the second diode 204, and the first resistor 202. The second transistor 203 is connected in series with the second inductor 201, the second diode 204, and the first resistor 202. The second capacitor 205 is electrically connected to the negative terminal of the second transistor 203 and the input terminal of the first resistor 202, respectively. The third capacitor 206 is electrically connected to the negative terminal of the second capacitor 205 and the output terminal of the first resistor 202, respectively. The second capacitor 205, the second inductor 201, the second transistor 203 and the second diode 204 form the boost circuit of the second-stage boost circuit 2. The second capacitor 205 and the third capacitor 206 are connected in parallel and together with the first resistor 202 form the filter circuit of the second-stage boost circuit 2.

[0020] In one embodiment, the boost control branch 4 includes a circuit breaker 401 and a second fuse 402, and the output terminal of the boost control branch 4 is electrically connected to the output terminal of the second diode 204.

[0021] In this utility model, the connection structure of the MOS transistor protection circuit 3 is the existing common connection structure. The MOS transistor is an N-type MOS transistor. The bases of the first transistor 104 and the second transistor 203 are both connected to the output terminal of the external control circuit. The external control circuit controls the switching of the first transistor 104 and the second transistor 203. The external control circuit outputs a chopping signal common to the boost circuit.

[0022] The working process of this utility model is as follows: When the power supply 101 is turned on and receives the input voltage, the current flows through the first fuse 103 to the first inductor 102, and the first inductor 102 begins to store energy. Simultaneously, the first diode 105 prevents reverse current flow. The first transistor 104 acts as a switching element, periodically turning on and off under the control of the output signal of the external control circuit. When the first transistor 104 is on, it provides a discharge path for the first inductor 102, allowing the energy stored in the inductor to be released. The first capacitor 106 is connected in parallel with the first transistor 104 to smooth the output voltage and reduce voltage fluctuations. Through the synergistic effect of the first inductor 102 and the first capacitor 106, the first-stage boost circuit 1 raises the input voltage to a higher level and outputs it to the MOSFET protection circuit 3. The MOSFET protection circuit 3 is located between the first-stage boost circuit 1 and the second-stage boost circuit 2, mainly used to protect the second-stage boost circuit 2 from abnormal conditions such as current surges. When the output voltage of the first-stage boost circuit 1 is abnormal or the current is too high, the MOSFET protection circuit 3 can respond quickly, cutting off or limiting the current flow to the second-stage boost circuit 2, thereby protecting it from damage. The input terminal of the second-stage boost circuit 2 is connected to the output terminal of the MOSFET protection circuit 3, receiving the protected voltage. The current flows through the second inductor 201 to the second diode 204 and the first resistor 202, where the second inductor 201 begins to store energy. The second transistor 203 also acts as a switching element, periodically turning on and off under the control of the output signal from the external control circuit, forming a boost circuit together with the second inductor 201. The second capacitor 205 and the third capacitor 206 are connected in parallel, forming a filter circuit together with the first resistor 202 to smooth the output voltage and reduce ripple. Through the synergistic effect of the second inductor 201, the second transistor 203, and the capacitors, the second-stage boost circuit 2 further boosts the voltage to the required level. The boost control branch 4 includes a circuit breaker 401 and a second fuse 402. Closing the circuit breaker bypasses the boost circuit of the secondary boost circuit 2. When it is necessary to simplify the circuit structure or reduce energy consumption, the boost circuit of the secondary boost circuit 2 can be disconnected by operating the circuit breaker 401, allowing the primary boost circuit 1 to be directly connected to the filter circuit of the secondary boost circuit 2. The second fuse 402 provides additional safety protection, preventing overload or short circuit in abnormal conditions.

[0023] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A voltage boosting circuit arrangement, characterized by The utility model provides a kind of voltage boosting circuit, including primary voltage boosting circuit (1), secondary voltage boosting circuit (2), MOS tube protection circuit (3) and voltage boosting control branch (4), the primary voltage boosting circuit (1) is connected with secondary voltage boosting circuit (2) in series, for enhancing circuit voltage boosting effect, MOS tube protection circuit (3) is electrically connected between the output of primary voltage boosting circuit (1) and the input of secondary voltage boosting circuit (2), the MOS tube protection circuit (3) is used to protect secondary voltage boosting circuit (2), voltage boosting control branch (4) is further provided between the primary voltage boosting circuit (1) and secondary voltage boosting circuit (2), the voltage boosting control branch (4) is used to jump over the voltage boosting loop of secondary voltage boosting circuit (2) and connect primary voltage boosting circuit (1) directly with the filter loop of secondary voltage boosting circuit (2).

2. A boost circuit arrangement according to claim 1, characterized in that The primary voltage boosting circuit (1) includes power supply (101), first inductor (102), first fuse (103), first triode (104), first diode (105) and first capacitor (106), the positive pole of power supply (101) is sequentially connected with first fuse (103), first inductor (102), first diode (105), the negative pole of power supply (101) is electrically connected with first triode (104) in parallel with first inductor (102), the collector of first triode (104) is electrically connected with the output of first inductor (102), the negative pole of power supply (101) is electrically connected with first capacitor (106) in parallel with first triode (104), the other end of first capacitor (106) is electrically connected with the output of first diode (105), the primary voltage boosting circuit (1) is used to promote the output voltage of primary voltage boosting circuit (1) by first inductor (102) and first capacitor (106), the output positive pole of primary voltage boosting circuit (1) is electrically connected with the input of MOS tube protection circuit (3), and the output negative pole of primary voltage boosting circuit (1) is grounded.

3. A boost circuit arrangement according to claim 1, characterized in that The positive input end of the secondary voltage boosting circuit (2) is electrically connected with the output end of the MOS tube protection circuit (3), and the negative input end is electrically connected with the negative output end of the primary voltage boosting circuit (1).

4. A boost circuit arrangement according to claim 3, characterised in that The secondary voltage boosting circuit (2) comprises a second inductor (201), a first resistor (202), a second triode (203), a second diode (204), a second capacitor (205) and a third capacitor (206). The positive input end of the secondary voltage boosting circuit (2) is sequentially connected with the second inductor (201), the second diode (204) and the first resistor (202) in series. The second triode (203) is connected with the second inductor (201) in parallel. The two ends of the second capacitor (205) are respectively electrically connected with the negative electrode of the second triode (203) and the input end of the first resistor (202). The two ends of the third capacitor (206) are respectively electrically connected with the negative electrode of the second capacitor (205) and the output end of the first resistor (202). The second capacitor (205) and the second inductor (201), the second triode (203) and the second diode (204) constitute a voltage boosting loop of the secondary voltage boosting circuit (2). The second capacitor (205) and the third capacitor (206) are connected in parallel and constitute a filter loop of the secondary voltage boosting circuit (2) with the first resistor (202). The voltage boosting control branch (4) comprises a circuit breaker (401) and a second fuse (402). The output end of the voltage boosting control branch (4) is electrically connected with the output end of the second diode (204).

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