CN101520669B - 300pin 10G optical module self-adaptive power - Google Patents
300pin 10G optical module self-adaptive power Download PDFInfo
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- CN101520669B CN101520669B CN2008100654363A CN200810065436A CN101520669B CN 101520669 B CN101520669 B CN 101520669B CN 2008100654363 A CN2008100654363 A CN 2008100654363A CN 200810065436 A CN200810065436 A CN 200810065436A CN 101520669 B CN101520669 B CN 101520669B
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- resistance
- adaptive power
- reference voltage
- optical module
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Abstract
The invention discloses a 300pin 10G optical module self-adaptive power, which comprises a first resister, a second resister and a third resister; two ends of the third resister are respectively connected with the voltage output terminal of the self-adaptive power and a reference voltage terminal; the first resister and the second resister are connected in series between the reference voltage terminal and the grounding terminal of the self-adaptive power; and the self-adaptive power also comprises a current division network which is connected with the reference voltage terminal and used for dividing the current flowing through the third resister. The technical proposal of the invention can meet the performance requirement on the self-adaptive power in the protocol when the reference voltage is higher than 0.8V.
Description
Technical field
The present invention relates to a kind of adaptive power supply, especially a kind of 300pin 10G optical module self-adaptive power.
Background technology
300pin 10G optical module protocol requirement veneer can provide APS (Adaptable Power Supply, adaptive power supply) for optical module, and the voltage range of APS is 0.9v-2.5v.As shown in Figure 1, the interface of APS and 300pin 10G optical module comprises following four signal: APS_digital, APS_sense, APS_set and GND.APS by APS_digital signal and GND to module for power supply; The APS_sense signal provides long-range induction for output voltage; APS_set sets the point of adjustment of APS output voltage.The computing formula of the output voltage V aps of APS is as follows:
Vaps＝Vsense*R3/(R2+R1)+Vsense (1)
Stipulated the pairing R3=1000ohm of 0.8v reference voltage (Vsense), R2=470ohm in the agreement, in the value substitution formula (1) of R2, R3, can get:
Vaps＝800/(470+R1)+0.8 (2)
The corresponding relation of R1 is as shown in table 1 in Vaps that stipulates in the agreement and the 300pin module, the value of resistance R 1 is to try to achieve on the basis of Vsense=0.8v, therefore APS controls IC (Integrated Circuit, integrated circuit) 0.8v reference voltage strictness has limited the selection of designer to power supply control IC, in the hardware development process, tend to cause problems such as this increase.
| ?Resistor?R1(Ω) | Vaps(V) |
| ?7530 | 0.9 |
| ?1530 | 1.2 |
| ?672 | 1.5 |
| ?330 | 1.8 |
| ?0 | 2.5 |
Table 1
Summary of the invention
The technical problem to be solved in the present invention provides a kind of 300pin 10G optical module APS, can satisfy under the situation of reference voltage V sense＞0.8v in the agreement the performance requirement of APS, has broken through the limitation that APS control IC selects.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of 300pin 10G optical module APS, comprise first resistance, second resistance and the 3rd resistance, the two ends of described the 3rd resistance link to each other with voltage output end and the reference voltage terminal of described APS respectively, described first resistance and second resistance string are connected between the earth terminal of described reference voltage terminal and described APS, described APS also comprises the electric current current-dividing network that links to each other with described reference voltage terminal, is used to shunt the electric current of described the 3rd resistance of flowing through.
In the such scheme, the voltage of described reference voltage terminal is higher than 0.8v.
In the such scheme, described electric current current-dividing network comprises the 4th resistance and current-dividing network voltage end, and the two ends of described the 4th resistance link to each other with described reference voltage terminal and current-dividing network voltage end respectively.
In the such scheme, the resistance of described second resistance is 470ohm, and the resistance of described first resistance is regulated by corresponding point of adjustment.
In the such scheme, the voltage of described reference voltage terminal is 0.891v, and when the voltage of described current-dividing network voltage end was 2.8v, the resistance of described the 3rd resistance was 897.87ohm, and the resistance of described the 4th resistance is 18835.49ohm.
Beneficial effect of the present invention mainly shows: technical scheme provided by the invention has increased the electric current current-dividing network of the 3rd resistance (R3), APS after the improvement can satisfy in the agreement performance requirement to APS under the situation of reference voltage V sense＞0.8v, broken through the limitation that APS control IC selects, made hardware engineer to carry out comprehensive consideration to select suitable control IC according to limiting factors such as costs.
Description of drawings
Fig. 1 is the principle schematic of APS and optical module coupling part in the 300pin 10G optical module agreement;
Fig. 2 is the structural representation of 300pin 10G optical module APS of the present invention and optical module coupling part;
Fig. 3 is the structural representation of one embodiment of the invention and optical module coupling part.
Embodiment
Fig. 1 is described in background technology, repeats no more herein.The invention will be further described below in conjunction with Fig. 2, Fig. 3.
With reference to Fig. 2, a kind of 300pin 10G optical module APS, comprise first resistance R 1, second resistance R 2 and the 3rd resistance R 3, the two ends of the 3rd resistance R 3 link to each other with voltage output end APS_digital and the reference voltage V sense end of APS respectively, first resistance R 1 and second resistance R 2 are serially connected with between the earth terminal of Vsense end and APS, simultaneously, this APS also comprise link to each other with Vsense end be used to shunt the electric current current-dividing network of the 3rd resistance R 3 electric currents of flowing through.Can adopt scheme shown in Figure 3 in the practice, be that the electric current current-dividing network comprises the 4th resistance R 4 and current-dividing network voltage Vbias end, the two ends of the 4th resistance link to each other with Vsense end and Vbias end respectively, simultaneously, the resistance of second resistance R 2 is 470ohm, and the resistance of first resistance R 1 is regulated by corresponding point of adjustment APS_set.
Can derive according to Fig. 3:
Vaps＝R3*[Vsense/(R2+R1)-(Vbias-Vsense)/R4]+Vsense
＝R3*Vsense/(R2+R1)-(Vbias-Vsense)*R3/R4+Vsense
(3)
Following formula is found the solution and can be obtained:
R3＝800/Vsense(ohm) (4)
R4＝(Vbias-Vsense)*800/Vsense/(Vsense-0.8)(ohm)
(5)
So if the Vsense=0.891v that control IC provides, Vbias=2.8v then according to formula (4) and formula (5), can obtain: R3=897.87ohm, R4=18835.49ohm further according to value and the formula (3) of R3, R4, can obtain:
Vaps＝800/(470+R1)+0.8 (6)
Comparison expression (2) and formula (6), two formula are identical, and therefore, under the situation of Vsense＞0.8v, said method satisfies in the 300pin 10G optical module agreement performance requirement to APS fully.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (4)
1. 300pin 10G optical module self-adaptive power, comprise first resistance, second resistance and the 3rd resistance, the two ends of described the 3rd resistance link to each other with the voltage output end and the reference voltage terminal of described adaptive power supply respectively, described first resistance and second resistance string are connected between the earth terminal of described reference voltage terminal and described adaptive power supply, it is characterized in that: described adaptive power supply also comprises the electric current current-dividing network that links to each other with described reference voltage terminal, be used to shunt the electric current of described the 3rd resistance of flowing through, the voltage of described reference voltage terminal is higher than 0.8v.
2. 300pin 10G optical module self-adaptive power as claimed in claim 1, it is characterized in that: described electric current current-dividing network comprises the 4th resistance and current-dividing network voltage end, and the two ends of described the 4th resistance link to each other with described reference voltage terminal and current-dividing network voltage end respectively.
3. 300pin 10G optical module self-adaptive power as claimed in claim 2 is characterized in that: the resistance of described second resistance is 470ohm, and the resistance of described first resistance is regulated by corresponding point of adjustment.
4. 300pin 10G optical module self-adaptive power as claimed in claim 3, it is characterized in that: the voltage of described reference voltage terminal is 0.891v, when the voltage of described current-dividing network voltage end is 2.8v, the resistance of described the 3rd resistance is 897.87ohm, and the resistance of described the 4th resistance is 18835.49ohm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100654363A CN101520669B (en) | 2008-02-27 | 2008-02-27 | 300pin 10G optical module self-adaptive power |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100654363A CN101520669B (en) | 2008-02-27 | 2008-02-27 | 300pin 10G optical module self-adaptive power |
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| CN101520669A CN101520669A (en) | 2009-09-02 |
| CN101520669B true CN101520669B (en) | 2011-03-16 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646291A (en) | 2009-08-27 | 2010-02-10 | 中兴通讯股份有限公司 | Method and device for supplying power to 300 PIN 40 Gb optical module |
| CN101867288A (en) | 2010-06-09 | 2010-10-20 | 中兴通讯股份有限公司 | Device and method for supplying power to 300PIN 40Gb optical module |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100634A (en) * | 1987-02-06 | 1987-10-21 | 国营重庆无线电厂 | Voltage adaptive power circuit |
| US5838151A (en) * | 1997-03-03 | 1998-11-17 | Motorola, Inc. | Wireless load sharing for parallel power converters and method |
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2008
- 2008-02-27 CN CN2008100654363A patent/CN101520669B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100634A (en) * | 1987-02-06 | 1987-10-21 | 国营重庆无线电厂 | Voltage adaptive power circuit |
| US5838151A (en) * | 1997-03-03 | 1998-11-17 | Motorola, Inc. | Wireless load sharing for parallel power converters and method |
Non-Patent Citations (1)
| Title |
|---|
| 红林.XENPAK 自适应电源设计.《电子设计应用》.2003,(第7期),第93-94页. * |
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