JP3569219B2 - Switching regulator power supply - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a switching regulator power supply that generates an output voltage with a large current.
[0002]
[Prior art]
Conventionally, when a voltage generated by a switching regulator power supply is supplied to another device, it is often output via a connector.However, if the output current increases, a voltage drop due to contact resistance cannot be ignored, so a terminal block is provided. It has been practiced to screw connection wires to terminal blocks.
[0003]
In addition, when the output current increases, a thick connection lead is required, and the force applied to the terminal block cannot be ignored. Therefore, a fixing terminal is provided on the terminal block, and the fixing terminal is fixed to the substrate.
[0004]
Furthermore, if the output current increases, the voltage drop will increase even if the circuit pattern routed to the board is wide, so it is not practical to connect the output voltage to the terminal block with the circuit pattern. The board is led out, and a conductive plate is connected near the output stabilizing voltage generating circuit so that the voltage drop from the stabilizing voltage generating circuit to the terminal block is reduced.
[0005]
With such a structure, the voltage drop at the conductive plate can be reduced, but when the output current increases, the voltage drop at the portion where the conductive plate is soldered to the circuit portion of the substrate cannot be ignored. To compensate for this voltage drop, the voltage at the output terminal of the terminal block is fed back to the stabilizing voltage generation circuit so that the voltage at the output terminal becomes a desired voltage.
[0006]
[Problems to be solved by the invention]
However, with such a structure, it is necessary to connect a connection line for feeding back the voltage of the output terminal to the stabilized voltage generating circuit between the terminal block and the board, and the connection work is performed in the board assembly process. It is necessary separately, and an accident such as forgetting to connect may occur.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a switching regulator power supply device in which all assembly is completed in a board assembling process, thereby reducing the number of connection line wiring steps for sensing and preventing connection failure.
[0008]
[Means for Solving the Problems]
To achieve this object, the switching regulator power supply of the present invention is configured as follows.
[0009]
First, according to the present invention, an output voltage generated by a stabilized voltage generation circuit mounted on a substrate is supplied to an output terminal of the terminal block via a conductive plate derived from the terminal block, and the output voltage is stabilized by the stabilized voltage generation circuit. And a switching regulator power supply device that controls the output voltage to a predetermined voltage by feeding back to the switching regulator power supply.
[0011]
A fixed lead for fixing to the printed wiring board is provided at one position, and a terminal block having sensing leads extending from the output terminal electrode to a portion reaching the circuit of the substrate and having a fixing function is provided at the other position. It is characterized by. According to such an apparatus of the present invention, the information of the output voltage is given to the circuit of the substrate via the sensing lead provided so as to reach the circuit of the substrate, so that all the operations can be completed only by the assembling process. This eliminates the need for work after the completion of assembly, and prevents the accident of forgetting to connect the sensing lead connection wires.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a circuit diagram showing an embodiment of the present invention. The voltage generated by the stabilized voltage generation circuit 10 is output to patterns 12 and 14 provided near the output terminal of the stabilized voltage generation circuit 10. The patterns 12 and 14 are provided with a plurality of connection lands 12a to 12e and 14a to 14e, and the conductive plates 18 and 20 derived from the terminal block 16 are connected to the lands.
[0013]
The conductive plates 18 and 20 are made of a thick copper plate or the like so that a voltage drop is reduced. The terminal block 16 and the conductive plates 18 and 20 have the structure shown in the perspective view of FIG. 2, and the conductive plate 18 has a bent portion 18b which is bent upward from a predetermined position of the linear portion 18a in the figure. The distal end of the bent portion 18b is electrically connected to both of the plus terminals 16a and 16b inside the terminal block 16. Similarly, the conductive plate 20 also has a bent portion 20b which is bent upward from the predetermined position of the linear portion 20a in the figure, and the distal end of the bent portion 20b has negative terminals 16c and 16d inside the terminal block 16. Connected to both.
[0014]
The terminal block 16 has a bottom surface 16e mounted on the component surface of the substrate, and fixed leads 16f and 16g for fixing the terminal block 16 to the substrate project from the bottom surface 16e.
[0015]
Sensing leads 18c, 20c are formed so as to protrude in the same direction as the fixed leads 16f, 16g from the end surfaces of the bent portions 18b, 20b of the conductive plates 18, 20 which are closest to the terminal block 16. Also, comb-shaped projections 18d to 18h and 20d to 20h for insertion into the lands 12a to 12e and 14a to 14e in FIG. 1 project from the end surfaces of the horizontal portions 18a and 20a in the same direction as the sensing leads 18c and 20c. .
[0016]
The sensing leads 18c and 20c are inserted into the lands 22 and 24 of FIG. 1, and the voltage of the terminal block 16 is fed back to the stabilized voltage generating circuit 10 via the patterns 26 and 28 provided on the substrate. Is controlled so that the output voltage of the portion becomes a predetermined value.
[0017]
FIG. 3 is a plan view when the terminal block 16 is mounted on the board 30. The fixed leads 16f and 16g, the sensing leads 18c and 20c, the projections 18d to 18h, and 20d to 20h of FIG. It has a length, is soldered and fixed to the circuit, and the protrusions of the horizontal portions 18a and 20a are soldered and fixed to the lands 12a to 12e and 14a to 14e near the stabilized voltage generating circuit 10. I have.
[0018]
With this configuration, the pattern from the stabilized voltage generating circuit 10 to the conductive plates 18 and 20 can be shortened, and the voltage drop at the pattern portion can be reduced. Although the portions of the projections 18d to 18h and 20d to 20h of the conductive plates 18 and 20 are soldered, a slight voltage drop occurs here. However, since the conductive plates 18 and 20 are made of a thick copper plate or the like, they are conductive. The voltage generated by the stabilized voltage generating circuit 10 is supplied to the terminal block 16 with almost no voltage drop on the plates 18 and 20.
[0019]
Since the sensing leads 18 c and 20 c are provided at positions near the terminal block 16, the voltage near the terminal block 16 is fed back to the stabilized voltage generation circuit 10 via the pattern of the substrate 30 to supply the terminal block 16. The voltage can be any desired value.
[0020]
FIG. 4 shows a modification of the terminal block 16 in which the sensing leads 16h and 16i are provided near the terminals 16a to 16d. Strictly speaking, the voltage of the terminals 16a to 16d is higher in this shape than in FIG. Can be detected more accurately.
[0021]
FIG. 5 shows still another modification of the terminal block 16, in which the projections 18d and 20d of the conductive plates 18 and 20 are also used as sensing leads. In this structure, since the function of fixing the terminal block 16 by the sensing lead cannot be expected, the terminal block 16 is additionally provided with fixed leads 16j and 16k. However, when the output current is small, the connection to the terminal block 16 is made. Since it is not necessary to make the wire too thick, the force applied to the connection wire is also reduced, so that the fixed leads 16j and 16k may be omitted in some cases.
[0022]
【The invention's effect】
As described above, according to the present invention, the sensing lead is provided in a portion near the terminal block of the conductive plate led out from the terminal block, so that the connection line for the feedback which has conventionally been required to be connected after assembling the board is provided. The connection affirmation can be omitted, the number of assembling steps can be reduced, and the accident of forgetting the connection can be prevented.
[0023]
Further, since the sensing lead also has a function of fixing the terminal block, the number of fixed leads of the terminal block can be reduced, and the structure of the terminal block can be simplified.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing a switching regulator power supply device to which the present invention is applied. FIG. 2 is a perspective view showing one embodiment of the present invention. FIG. 3 is a plan view showing a state where a terminal block is mounted on a substrate. FIG. 5 is a perspective view showing another embodiment of the present invention. FIG. 5 is a perspective view showing another embodiment of the present invention.
10: stabilized voltage generating circuit 16: terminal blocks 16a to 16d: terminals 16f, 16g: fixed leads 16j, 16h, 18c, 20c: sensing leads 18, 20: conductive plates 18a, 20a: linear portions 18b, 20b: bent portion 30: Substrate

Claims (1)

The output voltage generated by the stabilized voltage generating circuit mounted on the substrate is supplied to the output terminal of the terminal block via a conductive plate derived from the terminal block, and the output voltage is fed back to the stabilized voltage generating circuit. In the switching regulator power supply device that controls the output voltage to a predetermined voltage by
A fixed lead for fixing to the printed wiring board is provided at one position, and a terminal block having a sensing lead that also extends from the output terminal electrode to a portion reaching the circuit of the substrate and has a fixing function is provided at the other position. A switching regulator power supply device characterized by the above-mentioned.

Images