CN202949355U - Circuit for achieving transmitter-receiver (TR) module power source timing sequence switching by optical coupler - Google Patents
Circuit for achieving transmitter-receiver (TR) module power source timing sequence switching by optical coupler Download PDFInfo
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- CN202949355U CN202949355U CN 201220630588 CN201220630588U CN202949355U CN 202949355 U CN202949355 U CN 202949355U CN 201220630588 CN201220630588 CN 201220630588 CN 201220630588 U CN201220630588 U CN 201220630588U CN 202949355 U CN202949355 U CN 202949355U
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Abstract
The utility model discloses a circuit for achieving transmitter-receiver (TR) module power source timing sequence switching by an optical coupler. The circuit comprises a first resistor, a second resistor, a capacitor, the optical coupler and a low voltage adjustable precise shunt regulator. According to the circuit, switching of a secondary power source is achieved by the aid of change of characteristics of the optical coupler. The circuit has the advantages that the optical coupler and certain auxiliary elements are used for finishing sequential control, hardware is completely used for finishing sequential control, and thereby the negative effects caused by power-on reset of a single chip microcomputer are absent; input and output transmission of the optical coupler is finished by a photoelectrical coupling method, so that isolation among power sources is not affected; influences after sudden power interruption can instantly react on the optical coupler so that each group of power sources is effectively controlled; and the circuit is simple in structure and small in size, and complex programming is omitted.
Description
Technical field
The utility model relates to a kind of circuit that utilizes optical coupler characteristic reality TR assembly power supply sequence switch.
Background technology
According to TR assembly power supply characteristic, when arbitrary moment, accessory power supply was non-existent, main power source must cut out immediately, because power model will be in not slave mode this moment, the probability of damage is very big.
The external sequence switch technology that is applied at present TR assembly power supply is mainly completed by system MCU, as LEMO company, and logimctrics company etc.
Due to the projection of TR assembly industry, many universities and colleges, R﹠D institution also developed the TR assembly of oneself one after another in domestic these several years, were nearly all to be completed by system controller but control this respect at power supply.
Present TR assembly sequence switch mainly issues the switching on and shutting down instruction by the CPU of system controller.The shortcoming of this method is:
All need when 1, single-chip microcomputer powers on to reset, reseting stage I/O mouth level not necessarily system need.
2, be not easy to realize respectively organizing isolation between power supply.
3, power down suddenly can not realize the effective control to each group power supply.
4, need large-area pcb board face and complicated programming.
In order to solve above-mentioned deficiency of the prior art, the utility model proposes a kind of new solution.
The utility model content
The purpose of this utility model is to provide a kind of circuit that utilizes optical coupler characteristic reality TR assembly power supply sequence switch, the above problem that exists in order to solve the existing system controller that is used for TR assembly sequence switch.
For reaching the foregoing invention purpose, the technical scheme that the utility model adopts is: a kind of circuit of realizing TR assembly power supply sequence switch with optocoupler is provided, has comprised the first resistance, the second resistance, electric capacity, optical coupler and low-voltage adjustable accurate shunt regulator;
The high level end of accessory power supply is connected with an end of the first resistance and the second resistance respectively; The other end of the first resistance is connected with an end of electric capacity and the 1st pin of low-voltage adjustable accurate shunt regulator respectively; The other end of the second resistance is connected with the 1st pin of optical coupler, and the 2nd pin of optical coupler is connected with the 3rd pin of low-voltage adjustable accurate shunt regulator, and the 3rd pin of optical coupler is connected with the switch negative pole with the switch of power supply is anodal respectively with the 4th pin; The low level end of accessory power supply is connected with the other end of electric capacity and the 2nd pin of low-voltage adjustable accurate shunt regulator respectively.
Described low-voltage adjustable accurate shunt regulator is the TLV431 that Texas Instrument produces, and its 1st pin is reference, and the 2nd pin is negative electrode, and the 3rd pin is anode.
In sum, provided by the utility modelly realize that with optocoupler the circuit of TR assembly power supply sequence switch has following advantage:
1, this circuit adopts optical coupler and some auxiliary elements to complete sequencing control, adopts hardware to complete fully, so the negative effect that does not have the single-chip microcomputer electrification reset to bring;
2, optical coupler itself is exactly to complete input and the transmission of exporting by the method for photoelectric coupling, so also do not affect the isolation between power supply;
3, the meeting that affects after outage is suddenly reacted on optical coupler immediately, thereby each group power supply is control effectively;
4, this circuit structure is simple, and volume is small and exquisite, and has saved complicated programming.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Wherein, R1, the first resistance; R2, the second resistance; C, electric capacity; U, optical coupler; D, low-voltage adjustable accurate shunt regulator.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
-as shown in Figure 1, this realizes the circuit of TR assembly power supply sequence switch with optocoupler, comprises the first resistance R 1, the second resistance R 2, capacitor C, optical coupler U and low-voltage adjustable accurate shunt regulator D;
The high level end of accessory power supply is connected with the end of the first resistance R 1 with the second resistance R 2 respectively; The other end of the first resistance R 1 is connected with an end of capacitor C and the 1st pin of low-voltage adjustable accurate shunt regulator D respectively; The other end of the second resistance R 2 is connected with the 1st pin of optical coupler U, and the 2nd pin of optical coupler U is connected with the 3rd pin of low-voltage adjustable accurate shunt regulator D, and the 3rd pin of optical coupler U is connected with the switch negative pole with the switch of power supply is anodal respectively with the 4th pin; The low level end of accessory power supply is connected with the other end of capacitor C and the 2nd pin of low-voltage adjustable accurate shunt regulator D respectively.
Wherein, low-voltage adjustable accurate shunt regulator D is the TLV431 that Texas Instrument produces, and its 1st pin is reference, and the 2nd pin is negative electrode, and the 3rd pin is anode.
In Fig. 1, for this circuit supply be the accessory power supply of system, when accessory power supply began, by the charging of the 1 pair of capacitor C of the first resistance R, the charging interval was calculated as follows:
If V0 is the initial voltage value on capacitor C;
V1 is the D reference voltage value;
Vt is the magnitude of voltage on t moment capacitor C.
,
Vt="V0"+（V1-V0）*?[1-exp(-t/RC)]
t?=?RC*Ln[(V1-V0)/(V1-Vt)]
When voltage on capacitor C during higher than the 1st pin reference voltage of low-voltage adjustable accurate shunt regulator D, its the 3rd pin voltage is dragged down, optical coupler U is by forming conducting state by its 1st pin to the electric current of the 2nd pin, and then make its 3rd pin and the 4th pin form conducting state, with the switch of opening power.When System Sudden cuts off the power supply, accessory power supply begins to fall, and on capacitor C, voltage is lower than the D reference voltage, and the 3rd pin of low-voltage adjustable accurate shunt regulator D recovers high level, optical coupler U returns to off state by original conducting state, thereby in time closes the power supply of rear class.This circuit utilizes the transformation of this specific character of optical coupler U to form the switch of secondary power.
Although by reference to the accompanying drawings embodiment of the present utility model is described in detail, should not be construed as the restriction to the protection range of this patent.In the described scope of claims, the various modifications that those skilled in the art can make without creative work and distortion still belong to the protection range of this patent.
Claims (2)
1. realize the circuit of TR assembly power supply sequence switch with optocoupler, it is characterized in that: comprise the first resistance (R1), the second resistance (R2), electric capacity (C), optical coupler (U) and low-voltage adjustable accurate shunt regulator (D);
The high level end of accessory power supply is connected with the end of the first resistance (R1) with the second resistance (R2) respectively; The other end of the first resistance (R1) is connected with an end of electric capacity (C) and the 1st pin of low-voltage adjustable accurate shunt regulator (D) respectively; The other end of the second resistance (R2) is connected with the 1st pin of optical coupler (U), the 2nd pin of optical coupler (U) is connected with the 3rd pin of low-voltage adjustable accurate shunt regulator (D), and the 3rd pin of optical coupler (U) is connected with the switch negative pole with the switch of power supply is anodal respectively with the 4th pin; The low level end of accessory power supply is connected with the other end of electric capacity (C) and the 2nd pin of low-voltage adjustable accurate shunt regulator (D) respectively.
2. the circuit of realizing TR assembly power supply sequence switch with optocoupler according to claim 1, it is characterized in that: the TLV431 that described low-voltage adjustable accurate shunt regulator (D) is produced for Texas Instrument, its the 1st pin is reference, and the 2nd pin is negative electrode, and the 3rd pin is anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220630588 CN202949355U (en) | 2012-11-26 | 2012-11-26 | Circuit for achieving transmitter-receiver (TR) module power source timing sequence switching by optical coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220630588 CN202949355U (en) | 2012-11-26 | 2012-11-26 | Circuit for achieving transmitter-receiver (TR) module power source timing sequence switching by optical coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202949355U true CN202949355U (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220630588 Expired - Lifetime CN202949355U (en) | 2012-11-26 | 2012-11-26 | Circuit for achieving transmitter-receiver (TR) module power source timing sequence switching by optical coupler |
Country Status (1)
| Country | Link |
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| CN (1) | CN202949355U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449915A (en) * | 2018-11-06 | 2019-03-08 | 上海航天电子通讯设备研究所 | Circuit is protected in built-in miniaturization suitable for the power-up out of order of TR component |
-
2012
- 2012-11-26 CN CN 201220630588 patent/CN202949355U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449915A (en) * | 2018-11-06 | 2019-03-08 | 上海航天电子通讯设备研究所 | Circuit is protected in built-in miniaturization suitable for the power-up out of order of TR component |
| CN109449915B (en) * | 2018-11-06 | 2019-12-03 | 上海航天电子通讯设备研究所 | Circuit is protected in built-in miniaturization suitable for the power-up out of order of TR component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHENGDU SIWI POWER ELECTRONICS TECHNOLOGY CO., LTD Free format text: FORMER NAME: CHENGDU SIWI AVIATION POWER SUPPLY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 3, No. 1, building 1, building 35, 610091 west slope Su Road, Chengdu, Sichuan Patentee after: CHENGDU SIWI POWER ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 610091 Sichuan province Chengdu City Temple four electronic cutch building 3 floor Patentee before: CHENGDU SIWI AVIATIC POWER SUPPLY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130522 |