CN101175227A - IC chip and its electric control method - Google Patents
IC chip and its electric control method Download PDFInfo
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- CN101175227A CN101175227A CNA2007101938279A CN200710193827A CN101175227A CN 101175227 A CN101175227 A CN 101175227A CN A2007101938279 A CNA2007101938279 A CN A2007101938279A CN 200710193827 A CN200710193827 A CN 200710193827A CN 101175227 A CN101175227 A CN 101175227A
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Abstract
The present invention provides an IC chip and a power-down control method. The IC chip includes a first power module and a trigger module, wherein, the first power module is used to convert a voltage provided by an external power supply into a first working voltage, the first power module includes a receiving module which is used to receive a signal indicating if the external power supply is down, and a trigger module is used to trigger the first power module to be power-down after receiving a signal which indicates that the external power supply is down. The present invention realizes the power-down of the IC chip by picking the signal indicating the power-down of the external power supply.
Description
Technical field
Integrated circuit of the present invention (IC) specifically, relates to a kind of IC chip and following electric control method thereof.
Background technology
Along with the integrated level of IC is more and more higher, the function of IC becomes increasingly complex, and power consumption is also increasing, and a lot of IC uses the scheme of multiple feed, like this to IC different electrical power on/sequential control of electricity is also just more and more important down.In IC propositions that a lot of IC producers produces oneself/requirement of electricity down, as companies such as Vitess, Marvell, Broadcom all to own IC propose separately on/under electric requirement.
The power supply plan of the veneer of at present a lot of communication apparatus adopts the secondary power supply plan: veneer from alternating current 220V or-48V is transformed into 12V/5V/3.3V by power module, power conversion become 2.5V/1.8V/1.5V/1.2V.1.0V that IC needs or the like on veneer again.
The process of communication apparatus power supply power-fail is such: behind primary side power supply power-fail (off switch), because the electric capacity of the power supply of primary side also has electric charge, so also will be through a discharge process, can be the ms level under this process normal condition, when having dropped to below the normal working voltage threshold of primary side power supply when voltage, the primary side power supply will enter non-reliably working state, when supply convertor is inoperable, will change the state of powergood, the state of indication power supply, the Switching Power Supply of primary side is from the mix of work at this moment, enter off position, but at the voltage of secondary side in the time of ms level, voltage does not have obvious variation, and the Switching Power Supply of the secondary side of this moment is also in operate as normal, the voltage of primary side is descending simultaneously, when the power supply that drops to secondary side enters labile state, the output voltage of secondary side also just enters by electric capacity and has kept the state of voltage, this moment, the IC of secondary side kept with regard to the capacitor discharge that relies on secondary side, up to voltage is 0V, and then the power-down state of whole system is finished.
Because down the electricity order is from present angle, the short time can not caused damage to IC, and institute's following electricity control in proper order never causes everybody attention.With the control of electricity at present difficulty relatively comparatively speaking, so that everybody uses in present principle diagram design is fewer.
Provide in the prior art on a kind of PWM (Pulse-Width Modulation, pulse-width modulation) Switching Power Supply/following electric control circuit and PWM switch power supply system.Described system comprises the PWM switching power circuit, comprises the PWM chip in the PWM switching power circuit, and described switch power supply system also comprises: resistance R 1, R2, R3, and metal-oxide-semiconductor field effect transistor M1, M2, wherein, resistance R 1, R2 are series between power supply and the ground; R1 is connected with the grid of M1 with the tie point of R2; The source ground of M1, the drain electrode of M1 is connected with R3, and the other end of R3 is connected to power supply; R3 is connected with the grid of M2 with the tie point of M1 drain electrode, the source ground of M2, and the drain electrode of M2 is connected with the SS/ON end of PWM chip described in the PWM switching power circuit.On this power switch system/the electricity order has satisfied the requirement of back level chip down, and in following electric process, this system does not produce ringing.
The where the shoe pinches of following electric control is: when turning off power supply, because the instability of whole power supply, so be difficult to make that entire circuit is controlled among designer's the control.Be difficult to find the cutting point of electricity order under the control, be difficult in other words be controlled at and when initiate down electronic work, just difficult in fact picking up to the following signal of telecommunication.Yet, on the above-mentioned PWM Switching Power Supply/following electric control circuit and PWM switch power supply system can not realize picking up of electric control signal down.
Summary of the invention
The present invention aims to provide a kind of IC chip and following electric control method thereof, can solve the problem that can not find down electric control signal in the prior art.
According to one embodiment of present invention, a kind of IC chip is provided, it comprises first power module that is used for the voltage transitions that external power source provides is become first operating voltage, and first power module comprises: receiver module is used to receive the whether signal of power down of indication external power source; And trigger module, when being used to receive the power down of signal indication external power source, trigger the first power module power down.
According to another embodiment of the present invention, a kind of following electric control method of IC chip is provided, the IC chip comprises first power module that is used for the voltage transitions that external power source provides is become first operating voltage, may further comprise the steps: receive the whether signal of power down of indication external power source; And when receiving the power down of signal indication external power source, trigger the first power module power down.
The above embodiment of the present invention is by the "pickup" reaction external power source signal of power down whether, thereby provides control signal for the following electric control of IC chip.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic diagram according to the following electric control method of the embodiment of the invention;
Fig. 2 shows the circuit diagram according to the following electric control of the embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
One embodiment of the present of invention provide a kind of following electric control method of IC chip, the IC chip comprises first power module that is used for the voltage transitions that external power source provides is become first operating voltage, may further comprise the steps: receive the whether signal of power down of indication external power source; And when receiving the power down of signal indication external power source, trigger the first power module power down.
The primary power source of a lot of communication equipments provides the condition indicative signal of this power supply: Powergood (whether the indication power supply is normal) to the power supply of secondary side, in present a lot of designs, this signal is not all done and is considered and processing, this signal is first reaction signal of power supply power-fail in fact, the foregoing description utilizes this signal as the index signal of electricity order down just, thereby provides control signal for the following electric control of IC chip.
The IC chip can also comprise the second source module that is used for the voltage transitions that external power source provides is become second operating voltage, by the power down of external power source, makes the second source module lose input voltage and natural power down.Obviously, the following electric control mode of second source module is similar to prior art.
Because first power module is different with electric control mode under the second source module, thus can generation time poor, thus realization is in proper order down.If first power supply and second source cascade then can realize the following in succession of multistage power supply.
In above-mentioned following electric control method, when receiving the power down of signal indication external power source, also can trigger the discharge of first power module, for example use mosfet (field effect transistor) that first power module is discharged.
After the power supply power-fail of upper level, in a period of time, it generally is the time of ms-μ s level, the electric capacity of its input is kept its operate as normal by discharge, when capacitor discharge to he work on following in limited time, send the invalid signals of powergood, after receiving this signal, just begin to carry out down the electricity operation: after the control circuit of the power supply of electricity is received this signal under needing this moment, initiatively discharge by mosfet, after discharge is finished, reinform the operation that the power supply that need control on next road is carried out down electricity.The time that need to prove the following electricity of this active under the normal condition is on μ s level.
Fig. 1 shows the schematic diagram according to the following electric control method of the embodiment of the invention, may further comprise the steps:
Step S102, level power supply (being external power source) operate as normal under the situation of operate as normal;
Step S104 if the situation of power down may be artificial shutdown, also may be a powered-off fault;
Step S106, at this time going up level power supply is to keep operate as normal by the capacitor discharge short time (μ s-s) of its input;
Step S108 is when voltage drops to its minimum point of keeping operate as normal;
Step S110, it changes the state of Powergood signal, and this signal can just can be used as down the sign of electric control;
Step S112, and then the Powergood that picks up triggers the operation that entire circuit has entered time electric control.
Another embodiment of the present invention provides a kind of IC chip, it comprises first power module that is used for the voltage transitions that external power source provides is become first operating voltage, first power module comprises: receiver module is used to receive the whether signal of power down of indication external power source; And trigger module, when being used to receive the power down of signal indication external power source, trigger the first power module power down.
This embodiment is by the "pickup" reaction external power source signal of power down whether, thereby provides control signal for the following electric control of IC chip.
The IC chip also can comprise: discharge module, and its coupled discharge module and ground, its control end received signal, it is used for when control end receives the power down of signal indication external power source, conducting first power module and ground.
Discharge module can be a field effect transistor, and its grid is a control end, and its source electrode connects discharge module, and its drain electrode is connected to ground.
This IC chip can comprise a plurality of first power modules, and the voltage that is used for that external power source is provided converts first operating voltage of multiple different magnitudes of voltage respectively to.
This IC chip also can comprise conventional power module, for example is used for the voltage transitions that external power source provides is become the second source module of second operating voltage, and the second source module is received signal not.
In above-mentioned IC chip, signal is the Powergood signal, is provided by external power source.
Fig. 2 shows the circuit diagram according to the following electric control of the embodiment of the invention.Whole system is such: become+12V through change in voltage by～220, supplied with whole veneer and use.Again 12V has been varied to 3.3V on veneer, 2.5V is also changed by 3.3V.The input of main power source 201 is～220V, and a large amount of electric capacity is arranged, and its output also has a large amount of electric capacity, that is to say its down the input of level power supply a large amount of electric capacity is also arranged.
In the time of power supply 210 power down, on the ms level, rely on the electric capacity of 220V alternating current source to supply with normal operation.When the voltage of electric capacity is low time its normal power supply voltage, change the state of Powergood signal.At this time the voltage source 203 of Powergood signal triggering 2.5V at first enters down the mode of operation of electricity.2.5V following electric process comprise: turn-off the supply convertor 203 of 3.3V, and the discharge mosfet 205 of conducting 2.5V to 2.5V.Mosfet 205 bleeds off the voltage of 2.5V in the time range of about μ s level.
When 203 times electricity of voltage source of 2.5V finish, start the following electricity operation of 3.3V, be to turn-off the converter 202 of 12V equally to 3.3V, and the mosfet 204 that opens discharge.Wait discharge off, same whole discharge process still are μ s level.
We realize the control of the following electricity of whole power supply according to the method for present embodiment, at first turn off 2.5V, turn off 3.3V again.If descending electric process normally is first 12V, is 3.3V then, is 2.5V then.
The above embodiment of the present invention is by the "pickup" reaction external power source signal of power down whether, thereby provides control signal for the following electric control of IC chip.
The above is the preferred embodiments of the present 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 protection scope of the present invention.
Claims (10)
1. IC chip, it comprises first power module that is used for the voltage transitions that external power source provides is become first operating voltage, it is characterized in that, described first power module comprises:
Receiver module is used to receive the whether signal of power down of the described external power source of indication; And
Trigger module when being used to receive described signal and indicating described external power source power down, triggers the described first power module power down.
2. IC chip according to claim 1 is characterized in that, described IC chip also comprises:
Discharge module, its be coupled described discharge module and ground, its control end receives described signal, it is used for receiving described signal when indicating described external power source power down when described control end, described first power module of conducting with.
3. IC chip according to claim 2 is characterized in that described discharge module is a field effect transistor, and its grid is described control end, and its source electrode connects described discharge module, and its drain electrode is connected to ground.
4. IC chip according to claim 1 is characterized in that, comprises a plurality of described first power modules, and the voltage that is used for that external power source is provided converts first operating voltage of multiple different magnitudes of voltage respectively to.
5. IC chip according to claim 1 is characterized in that, also comprises the second source module that is used for the voltage transitions that external power source provides is become second operating voltage, and described second source module does not receive described signal.
6. IC chip according to claim 1 is characterized in that described signal is a condition indicative signal, is provided by described external power source.
7. the following electric control method of an IC chip, described IC chip comprises first power module that is used for the voltage transitions that external power source provides is become first operating voltage, it is characterized in that, may further comprise the steps:
Receive the whether signal of power down of the described external power source of indication; And
When receiving described signal when indicating described external power source power down, trigger the described first power module power down.
8. electric control method down according to claim 7 is characterized in that, and is further comprising the steps of:
When receiving described signal when indicating described external power source power down, with described first power module discharge.
9. electric control method down according to claim 7, described IC chip also comprises the second source module that is used for the voltage transitions that external power source provides is become second operating voltage, it is characterized in that:
By the power down of described external power source, make described second source module lose input voltage and natural power down.
10. electric control method down according to claim 7 is characterized in that described signal is a condition indicative signal, is provided by described external power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101938279A CN101175227A (en) | 2007-11-26 | 2007-11-26 | IC chip and its electric control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101938279A CN101175227A (en) | 2007-11-26 | 2007-11-26 | IC chip and its electric control method |
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| CN101175227A true CN101175227A (en) | 2008-05-07 |
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| CNA2007101938279A Pending CN101175227A (en) | 2007-11-26 | 2007-11-26 | IC chip and its electric control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713680A (en) * | 2012-10-08 | 2014-04-09 | 马维尔国际贸易有限公司 | Method and apparatus for regulator control |
| CN109976943A (en) * | 2017-12-28 | 2019-07-05 | 中兴通讯股份有限公司 | A kind of one-board power supply monitoring method and system |
| CN112421576A (en) * | 2020-10-30 | 2021-02-26 | 南京甄视智能科技有限公司 | Reverse connection prevention circuit of power supply |
-
2007
- 2007-11-26 CN CNA2007101938279A patent/CN101175227A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713680A (en) * | 2012-10-08 | 2014-04-09 | 马维尔国际贸易有限公司 | Method and apparatus for regulator control |
| US9436203B2 (en) | 2012-10-08 | 2016-09-06 | Marvell World Trade Ltd. | Method and apparatus for regulator control |
| CN103713680B (en) * | 2012-10-08 | 2017-03-01 | 马维尔国际贸易有限公司 | regulator control method and device |
| CN109976943A (en) * | 2017-12-28 | 2019-07-05 | 中兴通讯股份有限公司 | A kind of one-board power supply monitoring method and system |
| CN112421576A (en) * | 2020-10-30 | 2021-02-26 | 南京甄视智能科技有限公司 | Reverse connection prevention circuit of power supply |
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Application publication date: 20080507 |