Unlock instant, AI-driven research and patent intelligence for your innovation.

Switching power supply

Through the design of magnetic core coupling transformer and multi-layer wiring substrate, the problem of difficulty in achieving efficient miniaturization of low-voltage and high-current output in the existing technology is solved, and the efficiency and reliability of the switching power supply device are improved.

Inactive Publication Date: 2005-02-23
PANASONIC HOLDINGS CORP
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to efficiently transmit high-current high-frequency switching currents such as those described above, when forming wiring with sufficient line width on the printed circuit board P, especially because the switching elements Q1 and Q2 and the transformer The two-dimensional mounting density of electronic components such as T, diodes D1 and D2, and capacitor C1 is low. Due to the low mounting density, it is necessary to increase the size of the printed circuit board.
In addition, in the conventional switching power supply device 1000, since electronic components and the like of different sizes are mixed and arranged, an unused space area is generated on the upper part of the printed circuit board P.
That is, in the configuration of the conventional switching power supply device 1000, it is extremely difficult to miniaturize a so-called high-efficiency switching power supply device capable of outputting direct current with low voltage and large current.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0055] Figure 4 It is a circuit diagram of the switching power supply device 100 according to the first embodiment of the present invention. Such as Figure 4 As shown, the switching power supply device 100 shown in this embodiment has input smoothing capacitors 6a and 6b, n-channel type MOS field effect transistors (hereinafter referred to as "MOSFET") 8a and 8b, and has a transformer primary winding 9a and Transformer 9 consisting of transformer secondary winding 9b (winding ratio N:1) and transformer core 9c, first diode 10a and second diode 10b, inductor 13, output smoothing capacitor 7, control circuit 17 constituted. Furthermore, the respective active elements, passive elements, and the like are electrically connected so as to form a predetermined circuit, thereby constituting the switching power supply device 100 .

[0056] use Figure 4 The circuit diagram of the switching power supply device 100 shown in this embodiment will be described in detail. Externally ap...

no. 2 approach

[0087] Figure 11 It is a perspective view schematically showing the structure of the switching power supply device 500 according to the second embodiment of the present invention. Figure 12 is a schematic representation of the Figure 11 A side view of the structure of the switching power supply device 500 shown.

[0088]The circuit diagram of the switching power supply device 500 shown in this embodiment is the same as the circuit diagram of the switching power supply device 100 shown in the first embodiment. Therefore, descriptions of the circuit diagram and operation of the switching power supply device 500 according to the present embodiment are omitted here. However, the configuration of the switching power supply device 500 of the present embodiment is different from that of the switching power supply device 100 of the first embodiment in the form and arrangement position of the inductor 13 and the arrangement position of the output smoothing capacitor 7 . Therefore,...

no. 3 approach

[0095] Figure 13 It is a circuit diagram of a switching power supply device according to a third embodiment of the present invention. Such as Figure 13 As shown, the switching power supply device shown in this embodiment includes the following components: input smoothing capacitors 6a and 6b, n-channel MOSFETs 8a and 8b, and a primary winding 9a for a transformer and a secondary winding 9b for a transformer (winding ratio N : 1) Transformer 9 composed of transformer core 9c, MOSFET 8c functioning as a first rectifying element, MOSFET 8d functioning as a second rectifying element, inductor 13, output smoothing capacitor 7, and control circuit 17. Furthermore, a predetermined circuit is formed by electrically connecting respective active elements, passive elements, etc., and a switching power supply device is constituted.

[0096] use Figure 13 The circuit diagram of the switching power supply device shown in this embodiment will be described in detail. Externally applied...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A switching power supply device of the invention includes: a switching circuit for interrupting direct current to generate a pulse voltage; a transformer including a primary winding, a secondary winding, and a core for magnetically coupling the primary winding and the secondary winding; a multi-layer wiring board having wiring lines constituting the primary winding and the secondary winding; a rectifier circuit for rectifying an alternating current; a smoothing circuit for suppressing ripple; and a control circuit for controlling an output voltage from the smoothing circuit. The multi-layer wiring board is provided with at least the switching circuit and the rectifier circuit and is arranged on a main wiring board, and the control circuit is arranged on the main wiring board.

Description

technical field [0001] The invention relates to a switching power supply device arranged inside electronic equipment. Background technique [0002] Currently, a switching power supply unit is used as a power supply unit mounted in electronic equipment such as a personal computer. This switching power supply device is a kind of DC stabilized power supply, and its structure is such that the DC obtained from a commercial power supply or a battery or other power supply is converted into an audible frequency or higher (about several hundred kHz) by using the high-speed switching action of a semiconductor device such as a transistor. Control the pulse width and pulse interval of the pulse voltage, thereby outputting a constant voltage direct current. Since the switching power supply device configured in this way is characterized in that the output voltage is always kept constant regardless of the power consumption fluctuation of the load, it is small, lightweight, and high in eff...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/00H05K1/00H05K1/14H05K1/16H05K3/20
CPCH05K3/202H05K1/165H05K2201/09063H05K2201/086H05K1/144H05K1/0298H02M7/003H05K1/141
Owner PANASONIC HOLDINGS CORP