CN212324003U - Direct current 5V output power supply - Google Patents
Direct current 5V output power supply Download PDFInfo
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- CN212324003U CN212324003U CN202021180363.5U CN202021180363U CN212324003U CN 212324003 U CN212324003 U CN 212324003U CN 202021180363 U CN202021180363 U CN 202021180363U CN 212324003 U CN212324003 U CN 212324003U
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Abstract
The utility model provides a direct current 5V output power supply, including input rectifier module U1, DC/DC module U2, output rectification filter circuit unit and the hot plug circuit unit that connects gradually, external control port is constituteed to DC/DC module U2 and opto-coupler U8. By adopting the technical scheme, the utility model has the advantages of simple circuit, small volume, stable and controllable output and small-sized 5V direct current switch power supply; the modular circuit has the functions of input overvoltage and overcurrent, output current-limiting protection, output short-circuit protection and the like. The remote control of the power switch is realized. The adoption of the board card structure can be directly inserted into the board card cage of the hump control system, and the installation is convenient and the volume is small.
Description
Technical Field
The utility model belongs to the technical field of switching power supply, especially, relate to a direct current 5V output power supply, be applied to among the railway system power supply unit, the predominant use provides stable direct current 5V for the consumer, and this power module has multiple protect function, can satisfy the requirement of different application scenarios.
Background
Along with the high-speed development of power electronic technology, the workload of a railway hump yard is increased, the board card power consumption of a hump system is large, the power consumption of an intelligent control board card is also increased rapidly, and the equipment can not be powered off reliably.
Meanwhile, due to the fact that the space of equipment is limited, a power supply with small size and high power is urgently needed, the existing power supply cannot be controlled to be switched on and off remotely, and meanwhile the power supply has the advantages of being light in weight, high in efficiency, low in heat productivity, convenient to use, stable in performance and the like.
Disclosure of Invention
In view of the above, the present invention is directed to a dc5V output power supply to solve the above problems.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a direct current 5V output power supply comprises an input rectifying module U1, a DC/DC module U2, an output rectifying and filtering circuit unit and a hot plug circuit unit which are sequentially connected, wherein an external control port is formed by the DC/DC module U2 and an optical coupler U8.
Furthermore, the input rectification module U1 is of a model of far 1C21, and the DC/DC module U2 is of a model of V300C5C100BL, wherein a pin N of the input rectification module U1 is connected to a 220V-L connection terminal through a varistor Z1, a pin L is connected to 220V-N, a pin + is connected to an anode of a light emitting diode LED1, a cathode of the LED1 is grounded through a series resistor capacitor, and an EMI GND pin of the U1 is connected to an anode of the light emitting diode LED1 through a capacitor YC 1; meanwhile, the + pin of the U1 is connected with the + IN pin of the DC/DC module U2, and the-pin of the U1 is connected with the-IN pin of the DC/DC module U2 through a resistor R19; the + pin and the-pin of the U1 are respectively connected with the ST pin through a resistor V1 and a resistor V2; a BOK pin of U1 is connected with a collector of a triode Q1 through a resistor R5, an EN pin is connected with a base of a triode Q1 through a diode D4 and a resistor R6 in sequence, a base of the triode Q1 is grounded through capacitors C21 and YC2, a base of a triode Q1 is connected with a PC pin of U2 through a diode D5 and a resistor R7 in sequence, and an EN pin of U1 is connected with a capacitor C21 through a diode D4 and a resistor R6 in sequence; the output end of the U2 is connected with an output rectifying and filtering circuit unit.
Furthermore, the positive input end of the optical coupler U8 is connected with an external control signal wiring terminal through a resistor RT1, and is grounded through a light emitting diode LED2 and a resistor R10 in sequence, and the positive output end of the optical coupler U8 is connected with a PC pin of U2.
Further, the PR pin of the DC/DC module U2 is connected to the input terminal of the transformer T1, and the output terminal of the transformer T1 is used as a reserved port of the parallel bus.
Compared with the prior art, the power supply has the following advantages:
(1) by adopting the technical scheme, the utility model has the advantages of simple circuit, small volume, stable and controllable output and small-sized 5V direct current switch power supply;
(2) the power adopts the modular circuit, possesses functions such as input excessive pressure overcurrent, output current-limiting protection, output short-circuit protection.
(3) By adopting the above technical scheme, the utility model, remote control switch has been realized.
(4) The utility model discloses a power adopts the integrated circuit board structure, can the disect insertion in hump control system integrated circuit board cage, simple to operate, small in size.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a front view of an embodiment of a dc5V output power supply of the present invention;
fig. 2 is a side view of the dc5V output power supply according to the embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a dc5V output power supply according to an embodiment of the present invention.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The utility model provides a direct current 5V output power for solving the not enough of current power, as shown in fig. 3, including input rectifier module U1, DC/DC module U2, output rectification filter circuit unit and the hot plug circuit unit that connects gradually, external control port is constituteed to DC/DC module U2 and opto-coupler U8.
The input rectification module U1 is of model FARM1C21, the DC/DC module U2 is of model V300C5C100BL, wherein,
the N pin of the input rectifying module U1 is connected with a 220V-L wiring terminal through a voltage dependent resistor Z1, the L pin is connected with 220V-N, the + pin is connected with the anode of a light emitting diode LED1, the cathode of the LED1 is grounded through a resistor capacitor connected in series, and the EMI GND pin of the U1 is connected with the anode of a light emitting diode LED1 through a capacitor YC 1; meanwhile, the + pin of the U1 is connected with the + IN pin of the DC/DC module U2, and the-pin of the U1 is connected with the-IN pin of the DC/DC module U2 through a resistor R19; the + pin and the-pin of the U1 are respectively connected with the ST pin through a resistor V1 and a resistor V2; a BOK pin of U1 is connected with a collector of a triode Q1 through a resistor R5, an EN pin is connected with a base of a triode Q1 through a diode D4 and a resistor R6 in sequence, a base of the triode Q1 is grounded through capacitors C21 and YC2, a base of a triode Q1 is connected with a PC pin of U2 through a diode D5 and a resistor R7 in sequence, and an EN pin of U1 is connected with a capacitor C21 through a diode D4 and a resistor R6 in sequence; the output end of the U2 is connected with an output rectifying and filtering circuit unit.
The positive input end of the optical coupler U8 is connected with an external control signal wiring terminal through a resistor RT1, and is grounded through a light emitting diode LED2 and a resistor R10 in sequence, and the positive output end of the optical coupler U8 is connected with a PC pin of U2.
The PR pin of the DC/DC module U2 is connected to the input end of the transformer T1, and the output end of the transformer T1 serves as a reserved port of a parallel bus.
The working process of the dc5V output power supply of this embodiment is as follows:
according to the scheme, the AC220V is used as an input power supply, 220V-L and 220V-N are respectively used as input ends of the power supply module, wherein the 220V-L input end is connected with a fuse and used as an input voltage and current overload protection component. When an alternating current 220V voltage is input into a wiring terminal, a fuse F1 is connected, F1 is a 5A fuse, meanwhile, two ends of 220V-L and 220V-N are connected with a piezoresistor Z1, the model of the piezoresistor Z1 is 10D431K, an input overvoltage protection function can be provided, and the piezoresistor Z1 is connected with pins 1 and 2 of an input rectifying and filtering module U1, wherein the model of U1 is FARM1C21, the input voltage of U1 is AC 180V-264V, the output voltage DC 300V, the rated power is 500W, and functions of rectification, input overvoltage protection and the like are integrated in the U1;
the U1 outputs DC 300V after rectification, at the moment, the voltage of a pin 9 and a pin 5 of U1 is DC 300V, a pin 9 of U1 is connected to the anode of the LED1, the input display lamp LED1 is lightened, and the resistors R3 and R4 can provide protection for the LED1 light-emitting diode, so that the LED1 is prevented from being burnt due to overlarge current;
the output pins 9 and 5 of the U1 are respectively connected with a resistor V1 and a resistor V2, the resistance values are all 200K, and the resistors can be used as the bleeder resistors of U1 and C1; pin 8 of U1 (BOK pin) is bus normal signal pin, which can provide power termination advance warning signal, and pin voltage is referenced to negative output;
under the normal working condition, if the output voltage of the U1 is normal, a pin 2 (pin PC) of the U2 outputs high-level voltage, the access resistor R7 is connected, the R7 is connected with the anode of a rectifier diode D5, the cathode of the D5 is connected with the control end of a triode Q1, the triode Q1 is conducted, a pin 8 of the U1 is grounded through a resistor R5, and the pin 8 voltage of the U1 is zero; when the U2 is disabled, the 2-pin is low, the voltage of the 8-pin of the U1 is raised, and the U1 is disabled; pin 6 of U1 is connected to the anode of diode D4, constituting an enable control.
The U2 model is V300C5C100BL, U2 input voltage is AC 180V-375V, rated power 100W, output voltage DC5V, and simultaneously, the U2 internally integrates the functions of output short-circuit protection, output overvoltage protection and the like.
The input end of U2 is input by U1, the 9 th pin of U1 is input into 1 st pin (+ IN) of U2, the 5 th pin of U1 is input into 4 th pin (-IN) of U2, the output of U2 is positive (+ OUT), the output of U2 is negative (-OUT), one end of resistor R12 is connected with 6 th pin (SC pin) of U2, the other end is connected with 7 th pin of U2, the resistor is an up-regulation resistor, and the output power of the power supply can be ensured to be stable.
When the output DC5V of the U2 is output, filtered by the output and then input into a filter inductor L1, and then enters a hot plug circuit consisting of U3 and Q2 through filter capacitors C19 and C20, so that the power supply has a hot plug function.
External control interface: an external control port is formed by the optocoupler U8 and the U2, when a pin 18 of the wiring terminal is connected with a high level, a signal enters an input end of the optocoupler U8, an output end of the U8 is conducted, so that a pin 2 (a PC pin) of the U2 is grounded, the level is pulled to be below 2.3V, the U2 is disabled, meanwhile, an anode of the LED2 is grounded, the LED2 stops working, and the power output display lamp LED2 is turned off.
And a pin 3 (PR pin) of the U2 is connected to an input end of a transformer T1, the transformer T1 can transmit collected signals to terminals J1-35 and J1-41, and the transformer T1 provides electrical isolation for the PR pin. The pins J1-35 and J1-41 are used as the reserved ports of the parallel buses and are used when the power supplies need to be connected in parallel.
The power output of this embodiment is stable, adopts the integrated circuit board structure, and the appearance is as shown in fig. 1, 2, can the disect insertion hump control system integrated circuit board cage in, simple to operate, small in size. The power supply is mainly applied to power supply equipment of a hump control system of a railway system, mainly used for providing stable direct current 5V for power receiving equipment, has multiple protection functions and can meet the requirements of different application occasions.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The direct-current 5V output power supply is characterized by comprising an input rectifying module U1, a DC/DC module U2, an output rectifying and filtering circuit unit and a hot plug circuit unit which are sequentially connected, wherein an external control port is formed by the DC/DC module U2 and an optical coupler U8.
2. A dc5V output power supply according to claim 1, wherein: the input rectification module U1 is of model FARM1C21, the DC/DC module U2 is of model V300C5C100BL, wherein,
the N pin of the input rectifying module U1 is connected with a 220V-L wiring terminal through a voltage dependent resistor Z1, the L pin is connected with 220V-N, the + pin is connected with the anode of a light emitting diode LED1, the cathode of the LED1 is grounded through a resistor capacitor connected in series, and the EMI GND pin of the U1 is connected with the anode of a light emitting diode LED1 through a capacitor YC 1; meanwhile, the + pin of the U1 is connected with the + IN pin of the DC/DC module U2, and the-pin of the U1 is connected with the-IN pin of the DC/DC module U2 through a resistor R19; the + pin and the-pin of the U1 are respectively connected with the ST pin through a resistor V1 and a resistor V2; a BOK pin of U1 is connected with a collector of a triode Q1 through a resistor R5, an EN pin is connected with a base of a triode Q1 through a diode D4 and a resistor R6 in sequence, a base of the triode Q1 is grounded through capacitors C21 and YC2, a base of a triode Q1 is connected with a PC pin of U2 through a diode D5 and a resistor R7 in sequence, and an EN pin of U1 is connected with a capacitor C21 through a diode D4 and a resistor R6 in sequence; the output end of the U2 is connected with an output rectifying and filtering circuit unit.
3. A dc5V output power supply according to claim 2, wherein: the positive input end of the optical coupler U8 is connected with an external control signal wiring terminal through a resistor RT1, and is grounded through a light emitting diode LED2 and a resistor R10 in sequence, and the positive output end of the optical coupler U8 is connected with a PC pin of U2.
4. A dc5V output power supply according to claim 2, wherein: the PR pin of the DC/DC module U2 is connected to the input end of the transformer T1, and the output end of the transformer T1 serves as a reserved port of a parallel bus.
5. A dc5V output power supply according to claim 1, wherein: the power supply adopts a board card structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021180363.5U CN212324003U (en) | 2020-06-23 | 2020-06-23 | Direct current 5V output power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021180363.5U CN212324003U (en) | 2020-06-23 | 2020-06-23 | Direct current 5V output power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212324003U true CN212324003U (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021180363.5U Active CN212324003U (en) | 2020-06-23 | 2020-06-23 | Direct current 5V output power supply |
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|---|---|
| CN (1) | CN212324003U (en) |
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- 2020-06-23 CN CN202021180363.5U patent/CN212324003U/en active Active
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