Peak high-current switching power supply

Abstract

The utility model discloses a peak high-current switching power supply, which comprises a shell, a circuit board is fixedly arranged at the bottom of the inner side of the shell, an IC chip, a rectifier, a filtering device and a transformer are fixedly mounted at the top end of the circuit board, a first pin of the IC chip is connected with a capacitor C6, one end of the capacitor C6 far away from the IC chip is grounded, and the other end of the capacitor C6 far away from the rectifier is grounded. According to the peak large-current switching power supply, the first pin of the IC chip is externally connected with the capacitor C6, then the capacitor C6 is grounded, and overload protection time and capacitance values are set, so that a short-time peak power output function can be realized, the output voltage is ensured to be within a normal precision range, and along with the increase of a load, the output voltage is stable. When the internal CS peak value of the chip is larger than the OCP threshold value, the IC chip is triggered to time, after the internal timing time of the IC chip is 120 ms, the IC chip enters an external oscillator to time, and different OLP protection delay time can be achieved by adjusting the size of a capacitor C6 according to the requirement of overload protection time.

Description

Technical Field

[0001] The utility model relates to the field of switching power supplies, in particular to a peak high current switching power supply. Background Art

[0002] Switching power supply, also known as switching power supply or switching converter, is a high-frequency power conversion device. Its function is to convert a standard voltage into the voltage or current required by the user through different forms of architecture. However, the existing switching power supply cannot support short-term peak power output function and frequency multiplication when in use, resulting in inconvenience in operation.

[0003] In order to solve the above problems, a peak high current switching power supply is proposed. Summary of the invention

[0004] The purpose of the utility model is to provide a peak high current switching power supply to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a peak high current switching power supply, comprising a shell, a circuit board is fixedly arranged at the bottom of the inner side of the shell, an IC chip, a rectifier, a filtering device and a transformer are fixedly installed on the top of the circuit board, a first pin of the IC chip is connected to a capacitor C6, an end of the capacitor C6 away from the IC chip is grounded, a second pin of the IC chip is connected to a capacitor C10 and a resistor R6, an end of the capacitor C10 away from the IC chip is grounded, an end of the resistor R6 away from the IC chip is connected to a resistor R4, a resistor R5 and a capacitor CE3, an end of the resistor R4 away from the resistor R6 is connected to a resistor R3, an end of the resistor R5 away from the resistor R6 is connected to a capacitor C15 and a diode D2, and the The third pin of the IC chip is connected to a capacitor C4 and U2B, and the capacitors C4 and U2B are both grounded. The fourth pin of the IC chip is connected to a capacitor C5, a resistor R10, and a resistor R20. The end of the resistor R20 away from the IC chip is connected to a diode D5, and the diode D5, the diode D2, and the capacitor C15 are all connected to T1B. The end of the resistor R10 away from the IC chip is connected to a resistor R9, Q1, a capacitor C3, a resistor R11, a resistor R12, a resistor R13, and a resistor R14. The seventh pin of the IC chip is grounded. The eighth pin of the IC chip is connected to a resistor R8 and a resistor R7. The end of the resistor R7 away from the IC chip is connected to a diode D4, and the diode D4 and the resistor R8 are both connected to Q1.

[0006] The switching power supply connects the first pin of the IC chip to an external capacitor C6, then grounds the capacitor C6 and sets the overload protection time. The capacitance value can achieve a short-time peak power output function and ensure that the output voltage is within a normal accuracy range. As the load increases, when the CS peak value inside the chip is greater than the OCP threshold, the IC chip timing will be triggered. After the internal timing time of the IC chip ends after 120ms, the IC chip will enter the external oscillator timing. Different OLP protection delay times can be achieved by adjusting the size of the capacitor C6 according to the requirements of the overload protection time.

[0007] Preferably, a plurality of heat dissipation windows are provided in the middle of both sides of the shell, and dust shielding nets are fixedly provided inside the plurality of heat dissipation windows, so that the heat dissipation of the switching power supply is facilitated by the provision of the plurality of heat dissipation windows.

[0008] Preferably, a top cover is snap-fitted onto the top end of the shell, and the provision of the top cover facilitates sealing of the shell.

[0009] Preferably, a plurality of connecting slots are provided at the connection between the shell and the top cover, and a plurality of connecting slots are provided with connecting blocks inside, and a plurality of connecting blocks are fixedly connected to the top cover, so that the top cover can be limited and fixed by respectively engaging a plurality of connecting blocks with a plurality of connecting slots.

[0010] Preferably, two fixing members are fixedly provided at the bottom of both sides of the shell, and fixing holes are opened in the middle of the four fixing members. The matching arrangement of the four fixing members and the four fixing holes facilitates the fixed installation of the switching power supply.

[0011] Preferably, the back side of the shell is fixedly connected to a mounting seat, and a fan is fixedly installed in the middle of the inner side of the mounting seat. The fan introduces external air into the shell, thereby accelerating the rapid discharge of hot air in the shell, thereby improving heat dissipation efficiency.

[0012] Preferably, a dustproof net is fixedly provided at one end of the inner side of the mounting base, and the provision of the dustproof net can play a role in preventing dust.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the switching power supply connects the first pin of the IC chip to an external capacitor C6, then grounds the capacitor C6, and sets an overload protection time. The capacitance value of the capacitor can realize a short-time peak power output function, and ensure that the output voltage is within a normal accuracy range. As the load increases, when the CS peak value inside the chip is greater than the OCP threshold, the IC chip timing will be triggered. After the internal timing time of the IC chip ends after 120ms, the IC chip will enter the external oscillator timing. Different OLP protection delay times can be achieved by adjusting the size of the capacitor C6 according to the requirements of the overload protection time, and when the product is working at the peak current, the operating frequency of the switching power supply is also doubled. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 It is a front cross-sectional view of the utility model;

[0016] Figure 3 A circuit diagram of the utility model;

[0017] Figure 4 This is a functional block diagram of the utility model.

[0018] In the figure: 1. shell; 2. heat dissipation window; 3. dust screen; 4. fixing piece; 5. fixing hole; 6. top cover; 7. circuit board; 8. IC chip; 9. rectifier; 10. filter device; 11. transformer; 12. mounting base; 13. fan; 14. dust screen; 15. connecting card slot; 16. connecting card block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] See also Figure 1-4The utility model provides a peak high current switching power supply, including a shell 1, a circuit board 7 is fixedly arranged at the bottom of the inner side of the shell 1, an IC chip 8, a rectifier 9, a filter device 10 and a transformer 11 are fixedly installed on the top of the circuit board 7, a first pin of the IC chip 8 is connected to a capacitor C6, and an end of the capacitor C6 away from the IC chip 8 is grounded, a second pin of the IC chip 8 is connected to a capacitor C10 and a resistor R6, and an end of the capacitor C10 away from the IC chip 8 is grounded, an end of the resistor R6 away from the IC chip 8 is connected to a resistor R4, a resistor R5 and a capacitor CE3, an end of the resistor R4 away from the resistor R6 is connected to a resistor R3, an end of the resistor R5 away from the resistor R6 is connected to a capacitor C15 and a diode D2, a third pin of the IC chip 8 is connected to a capacitor C4 and U2B, and both the capacitor C4 and U2B are grounded, a fourth pin of the IC chip 8 is connected to a capacitor C5, a resistor R10 and a resistor R20, an end of the resistor R20 away from the IC chip 8 is connected to a diode D5, and the diode D5, the diode D2 and the capacitor C15 are all connected to T1B, The end of the resistor R10 away from the IC chip 8 is connected to resistors R9, Q1, capacitor C3, resistor R11, resistor R12, resistor R13 and resistor R14. The seventh pin of the IC chip 8 is grounded, the eighth pin of the IC chip 8 is connected to resistors R8 and R7, and the end of the resistor R7 away from the IC chip 8 is connected to a diode D4. The diode D4 and the resistor R8 are both connected to Q1. The switching power supply connects the first pin of the IC chip 8 to an external capacitor C6, and then grounds the capacitor C6, and sets the overload protection time. The capacitor capacitance can achieve a short-time peak power output function and ensure that the output voltage is within a normal accuracy range. As the load increases, when the CS peak value inside the chip is greater than the OCP threshold, the IC chip 8 timing will be triggered. After the internal timing time of the IC chip 8 ends after 120ms, the IC chip 8 will enter the external oscillator timing. According to the requirements of the overload protection time, different OLP protection delay times can be achieved by adjusting the size of the capacitor C6. When the peak current of the product is working, the operating frequency of the switching power supply also produces a double frequency.

[0021] A plurality of heat dissipation windows 2 are provided in the middle of both sides of the housing 1, and dust screens 3 are fixedly provided inside the plurality of heat dissipation windows 2. A top cover 6 is provided at the top of the housing 1, and a plurality of connection slots 15 are provided at the connection between the housing 1 and the top cover 6. Connection blocks 16 are provided inside the plurality of connection slots 15, and the plurality of connection blocks 16 are fixedly connected to the top cover 6.

[0022] When in use, the switching power supply can be easily cooled by the arrangement of the plurality of heat dissipation windows 2, the housing 1 can be easily sealed by the arrangement of the top cover 6, and the top cover 6 can be easily fixed by the plurality of connection card blocks 16 and the plurality of connection card slots 15 respectively.

[0023] Two fixing members 4 are fixedly provided at the bottom of both sides of the housing 1, and fixing holes 5 are provided in the middle of the four fixing members 4. A mounting seat 12 is fixedly connected to the back of the housing 1, and a fan 13 is fixedly installed in the middle of the inner side of the mounting seat 12, and a dust screen 14 is fixedly provided at one end of the inner side of the mounting seat 12;

[0024] When in use, the four fixing parts 4 and the four fixing holes 5 are arranged in coordination to facilitate the fixed installation of the switching power supply. The outside air is introduced into the shell 1 through the fan 13, thereby accelerating the rapid discharge of hot air in the shell 1, thereby improving the heat dissipation efficiency. The dustproof net 14 can play a dustproof role.

[0025] When the embodiment of the present application is in use: the switching power supply connects the first pin of the IC chip 8 to an external capacitor C6, then grounds the capacitor C6, and sets an overload protection time. The capacitance value can achieve a short-time peak power output function and ensure that the output voltage is within a normal accuracy range. As the load increases, when the CS peak value inside the chip is greater than the OCP threshold, the IC chip 8 timing will be triggered. After the internal timing time of the IC chip 8 ends after 120ms, the IC chip 8 will enter the external oscillator timing. Different OLP protection delay times can be achieved by adjusting the size of the capacitor C6 according to the requirements of the overload protection time. During use, the outside air is introduced into the shell 1 through the fan 13, thereby accelerating the rapid discharge of hot air in the shell 1, thereby improving the heat dissipation efficiency. When the product is working at the peak current, the operating frequency of the switching power supply also produces a double frequency.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high peak current switching power supply, comprising a housing (1), characterized in that: A circuit board (7) is fixedly arranged at the bottom of the inner side of the housing (1); an IC chip (8), a rectifier (9), a filtering device (10) and a transformer (11) are fixedly installed at the top of the circuit board (7); a first pin of the IC chip (8) is connected to a capacitor C6; an end of the capacitor C6 away from the IC chip (8) is grounded; a second pin of the IC chip (8) is connected to a capacitor C10 and a resistor R6; an end of the capacitor C10 away from the IC chip (8) is grounded; an end of the resistor R6 away from the IC chip (8) is connected to a resistor R4, a resistor R5 and a capacitor CE3; an end of the resistor R4 away from the resistor R6 is connected to a resistor R3; an end of the resistor R5 away from the resistor R6 is connected to a capacitor C15 and a diode D2; a third pin of the IC chip (8) is connected to a resistor R4, a resistor R5 and a capacitor CE3; The pin is connected to a capacitor C4 and U2B, and the capacitors C4 and U2B are both grounded. The fourth pin of the IC chip (8) is connected to a capacitor C5, a resistor R10 and a resistor R20. The end of the resistor R20 away from the IC chip (8) is connected to a diode D5. The diode D5, the diode D2 and the capacitor C15 are all connected to T1B. The end of the resistor R10 away from the IC chip (8) is connected to a resistor R9, Q1, a capacitor C3, a resistor R11, a resistor R12, a resistor R13 and a resistor R14. The seventh pin of the IC chip (8) is grounded. The eighth pin of the IC chip (8) is connected to a resistor R8 and a resistor R7. The end of the resistor R7 away from the IC chip (8) is connected to a diode D4. The diode D4 and the resistor R8 are both connected to Q1.

2. A peak high current switching power supply according to claim 1, characterized in that: A plurality of heat dissipation windows (2) are provided in the middle of both sides of the shell (1), and dust-proof nets (3) are fixedly arranged inside the plurality of heat dissipation windows (2).

3. A peak high current switching power supply according to claim 1, characterized in that: A top cover (6) is provided on the top end of the shell (1).

4. A peak high current switching power supply according to claim 3, characterized in that: A plurality of connection slots (15) are provided at the connection between the housing (1) and the top cover (6), and connection blocks (16) are provided inside the plurality of connection slots (15), and the plurality of connection blocks (16) are fixedly connected to the top cover (6).

5. A peak high current switching power supply according to claim 1, characterized in that: Two fixing members (4) are fixedly provided at the bottom of both sides of the shell (1), and fixing holes (5) are provided in the middle of the four fixing members (4).

6. A peak high current switching power supply according to claim 1, characterized in that: The back side of the housing (1) is fixedly connected to a mounting seat (12), and a fan (13) is fixedly mounted in the middle of the inner side of the mounting seat (12).

7. A peak high current switching power supply according to claim 6, characterized in that: A dustproof net (14) is fixedly arranged at one end of the inner side of the mounting seat (12).

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