CN201352767Y

CN201352767Y - Switch power supply module

Info

Publication number: CN201352767Y
Application number: CNU2009200376584U
Authority: CN
Inventors: 俞广志; 李平昌; 刘仕林; 蒋长献
Original assignee: NANJING CIILIC ELECTRONICS CO Ltd
Current assignee: NANJING CIILIC ELECTRONICS CO Ltd
Priority date: 2009-01-21
Filing date: 2009-01-21
Publication date: 2009-11-25
Anticipated expiration: 2019-01-21

Abstract

The utility model relates to a switch power supply module which is composed by the connection of an AC power supply input, a rectifier bridge filter circuit, a switch control circuit, a transformer converting circuit, an output rectifier filter and a feedback voltage-stabilizing circuit. A control integrated circuit IC1, a switch tube Q1, a transformer T, a rectifier bridge ZD1 and a feedback voltage-stabilizing assembly element are connected into a core circuit, and are encapsulated in a shell body together with the core circuit; electrolytic capacitors C1, C2 and C4 are arranged outside the shell body; the shell body is provided with a plurality of input-output pins, the core circuit is correspondingly connected with the electrolytic capacitors C1, C2 and C4 outside the shell body by the corresponding pins, and the pins comprise an AC power supply input pin, a DC positive-negative output pin and a grounding pin. By adopting the structure that the electrolytic capacitors of a switch power supply are separated from the core circuit which is composed of the control IC, MOSFET and the like, the layout of the core circuit of the switch power supply is fairly compact, the volume is obviously reduced, the installation and application are flexible, and the entire reliability is greatly improved.

Description

A kind of switch power module

Technical field

The utility model relates to a kind of switch power module, particularly is applicable to the switchette power module of various instrument and meters.

Background technology

Switching Power Supply is to utilize modern power electronics technology, and the time ratio that the control switch transistor is opened or turn-offed is kept a kind of power supply of regulated output voltage, and Switching Power Supply generally is made of pulse width modulation (PWM) control IC, MOSFET and electrochemical capacitor.Switching Power Supply is compared with linear power supply, and the cost of the two all increases along with the increase of power output, but the two rate of rise is different.The linear power supply cost is higher than Switching Power Supply on the contrary on a certain power output point, this point is called the cost rollback point.The development of Switching Power Supply be applied in energy savings, economize on resources and protect the environment aspect all to have great importance.Yet, the current application scenario that requires at the technical grade of small-power high reliability, it is big that Switching Power Supply also exists volume, the problem that reliability is not enough, can not replace linear power supply, particularly in present industrial automation was built, a large amount of on-the-spot automation equipments had to adopt linear power supply owing to be subjected to harsh spatial limitation.Resources such as a large amount of energy and copper iron have been wasted.

The content of utility model

The purpose of this utility model provides a kind of switch power module, by the structure that Switching Power Supply electrochemical capacitor and the core circuit of being made up of control IC, MOSFET etc. are separated, significantly reduce the volume of Switching Power Supply, significantly improve the Switching Power Supply reliability, make it can be widely used in the high reliability request that to use in the past and the occasion that volume is had strict demand.

The utility model switch power module is imported by AC power, the rectifier bridge filter circuit, ON-OFF control circuit, the transformer change-over circuit, output rectifying and wave-filtering and feedback regulation circuit are formed by connecting, wherein comprise control integrated circuit IC1, switching tube Q1, transformer T, rectifier bridge ZD1, feedback regulation assembly and electrochemical capacitor C1, C2, C4, it is characterized in that said control integrated circuit IC1, switching tube Q1, transformer T, rectifier bridge ZD1, feedback regulation component element and the core circuit that is linked to be thereof are potted in the housing, electrochemical capacitor C1, C2, C4 is positioned at outside the housing, housing is provided with a plurality of location pin, said core circuit is by corresponding pin and the outer electrochemical capacitor C1 of housing, C2, C4 is corresponding to be connected, and said pin also comprises the AC power input pin, positive and negative output pin of direct current and grounding pin.

Be made of accurate electronic component at the Switching Power Supply core circuit, the utility model can prevent effectively that by embedding these elements are subjected to the influence of weather or extraneous poor environment; On the other hand, electrochemical capacitor is bigger because of volume, and whole embedding is very big to the capacitive property influence, unsuitable embedding; Therefore the utility model only carries out independent embedding to core circuit, and electrochemical capacitor is placed in outside the housing, connect by pin, the Switching Power Supply of Zu Chenging has extremely strong environmental suitability like this, have superiority such as high voltage withstanding, antistatic, vibration resistance, dustproof, acid and alkali-resistance, reliability can reach MTBF500000 hour.The core circuit layout of Switching Power Supply can be very compact, and volume is significantly reduced, and applying flexible is installed, because the reliability of core circuit improves greatly, electric capacity itself just has very high reliability in addition, and therefore, the global reliability of this Switching Power Supply is very high.

The utility model Switching Power Supply not only can be applicable to a large amount of automation on-site terminal equipment and replaces linear power supply, even can use with requirements such as electric energy meter and extremely replace linear power supply in the equipment of harshness.

Description of drawings

With reference to the accompanying drawings for the utility model embodiment is specified.

Fig. 1 is the embodiment circuit structure diagram of the utility model switch power module,

Fig. 2 is respectively the embodiment circuit theory diagrams that this switch power module contains two outputs.

Fig. 3 is the shell structure schematic diagram of this switch power module.

Fig. 4 is the upward view of Fig. 3.

Fig. 5 represents the annexation schematic diagram of each pin of housing and Fig. 1, Fig. 2 circuit.

Each description of symbols among the figure:

C1, C2, C4, C5-electrochemical capacitor; C3-tantalum electric capacity; The T-transformer; The coil of L1, L1, L3-transformer; R1～R3-resistance; The ZD1-rectifier bridge; D1～D4-diode; The IC1-control integrated circuit; IC2-feedback sample integrated circuit; The VT-optocoupler; The Q1-switching tube; 1.～

-power module pin numbering, the live wire and the zero line of L, N-input; Each road voltage of V1+, V1-, V2+, V2--output; The 20-housing, 21-housing pin.

Embodiment

Fig. 1 and Fig. 2 are existing Switching Power Supply circuit diagram commonly used.Frame of broken lines is represented housing 20, and the circuit in the frame represents to be installed in the core circuit in the shell.

See Fig. 1 and illustrate that in conjunction with Fig. 4 pin of Fig. 4 correspondence (promptly in conjunction with) circuit theory of Switching Power Supply is as follows: power supply is by live wire L, zero line N input, the input of input rectifying bridge ZD1, through rectifier bridge ZD1 rectification, from output output dc voltage anode, through pin

Be connected with the electrochemical capacitor C1 anode outside the housing 20, the negative terminal of electrochemical capacitor C1 passes through pin and 10. 5. is connected with housing C2 anode outward with pin, 4. C2 negative terminal and pin be connected and enter the rectifier bridge negative terminal and form filtering, and provide starting resistor by 7 pin that resistance R 1 is received control integrated circuit IC1.The feedback signal that the feedback regulation circuit that the IC1 control integrated circuit is formed according to IC2, VT, R3 is introduced from 2 pin, by 8 pin switching tube Q1 is carried out switch control, the L1 coil of transformer T just flows through pulsating current through switching tube Q2, by the L2 coil coupling of transformer T, 7 pin that control integrated circuit IC1 is received in diode D1 rectification, pass through 3 filtering of tantalum capacitor C again, for IC1 provides operating voltage; 7. L3 coil negative terminal by transformer T is connected with electrochemical capacitor C4 negative terminal outside the shell by pin and outputs to V1-simultaneously, anode is through diode D3 rectification, 6. be connected with the anode of electrochemical capacitor C4 outside the shell by pin, form filtering and output to V1+, stable output voltage is provided.

Fig. 2 is the variation of Fig. 1, difference is to increase a transformer coil L4, rectifier diode D4, electrochemical capacitor C5 outside the shell, 9. L4 coil negative terminal is connected with electrochemical capacitor C5 negative terminal by pin and outputs to V2-, anode passes through diode D4 rectification, 8. is connected with the anode of electrochemical capacitor C5 by pin, forms filtering and outputs to V2+, and the second road stable output voltage is provided.

As Fig. 3, housing 20 is provided with a plurality of pins 21.From Fig. 3 and Fig. 4 as can be known, this module size is very little, this height 19.3mm, and long 40.5mm, wide 27.5mm, pin length 5.2mm can adapt to a lot of application scenarios.

The visible housing 20 of Fig. 4 is provided with and is numbered 1.～ The positioning layout of 11 pins.

Fig. 5 is illustrated as each pin of housing 20 and the annexation of switching power circuit, and as seen Fig. 5 contrasts Fig. 1 and Fig. 2, and pin is ground connection 1., 2., 3. pin meets input power supply L, N, and 4., 5. pin connects

capacitor C

1, and 7. 6. pin connect first output, pin 8., 9. connect second output, pin 10.,

Connect capacitor C 2.

Claims

1. switch power module, import by AC power, the rectifier bridge filter circuit, ON-OFF control circuit, the transformer change-over circuit, output rectifying and wave-filtering and feedback regulation circuit are formed by connecting, wherein comprise control integrated circuit IC1, switching tube Q1, transformer T, rectifier bridge ZD1, feedback regulation assembly and electrochemical capacitor C1, C2, C4, it is characterized in that said control integrated circuit IC1, switching tube Q1, transformer T, rectifier bridge ZD1, each element of feedback regulation assembly and the core circuit that is linked to be thereof are potted in the housing, electrochemical capacitor C1, C2, C4 is positioned at outside the housing, housing is provided with a plurality of inputs, output pin, said core circuit is by corresponding pin and the outer electrochemical capacitor C1 of housing, C2, C4 is corresponding to be connected, and said pin also comprises the AC power input pin, positive and negative output pin of direct current and grounding pin.