CN1293472C - Artificial tester of universal series bus power circuit - Google Patents
Artificial tester of universal series bus power circuit Download PDFInfo
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- CN1293472C CN1293472C CNB031191479A CN03119147A CN1293472C CN 1293472 C CN1293472 C CN 1293472C CN B031191479 A CNB031191479 A CN B031191479A CN 03119147 A CN03119147 A CN 03119147A CN 1293472 C CN1293472 C CN 1293472C
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Abstract
The present invention discloses simulation test equipment of a universal serial bus (USB) power supply circuit. The present invention comprises a power supply switch circuit, more than one USB power supply circuit with different materials and parts and load circuits which have the same number as USB power supply circuits. Every USB power supply circuit comprises a 5VCC first power supply module, a 106, 5VSB second power supply module and an electricity supply switching circuit. A switch signal generated by the power supply switch circuit simultaneously controls whether every power supply circuit 1 outputs a power supply signal. Every electricity supply switching circuit judges whether power supply signals are output or not according to a first power supply module 106 to control whether the power supply circuit 1 supplies electricity to the load circuit or not. The simulation test equipment of the present invention realizes that the performance of various USB power supply circuits is objectively compared under the condition that various external conditions are the same. Different methods and the influence of the materials and the parts on voltage drop are accurately evaluated, so advantages and disadvantages of the materials and the parts are clearer.
Description
Technical field
The present invention relates to the circuit test field, the simulated test device of particularly a kind of USB (universal serial bus) (USB) power circuit.
Background technology
In computer realm, universal serial bus device (USB device) is owing to supporting advantages such as hot plug, expansion is convenient, transmission speed is very fast to obtain application more and more widely.Flash disk, USB hard disk, USB CD-ROM drive, USB floppy drive or the like panoramic USB device has appearred.Various device institute power consumption stream has nothing in common with each other, the maximum 500mA that surpassed.Their power supply mainly is the 5VCC power supply that provides on the mainboard, and the voltage that USB device requires to provide is 4.75v, and the pressure drop in supply line just can not surpass 250mV like this.Again because most of USB device are supported arousal functions, so computing machine is after entering dormant state, and computer power supply provides a 5VSB power supply to continue as the USB device power supply.But the electric current of this 5VSB that computer power supply provided is less, requirement in the time of can not satisfying normal the use, therefore the circuit that needs a switching, when computing machine enters dormancy, power by 5VSB separately, when computing machine is got back to normal operating condition by dormant state, switch to by 5VCC and power.
At present, the method to the design of USB power supply in the computer motherboard design probably has two kinds: 1. traditional receives 5VSB from 5VCC by a diode, is the USB device power supply by an over-current over-voltage protection element and an electromagnetic radiation straining element again; 2. control two coupled metal-oxide-semiconductors by south bridge or ACPI controller, and two metal-oxide-semiconductors link to each other with 5VSB with 5VCC respectively, reaching the purpose that 5VCC and 5VSB switch, other identical with first kind of mode.These two kinds of main method add and can also change over-current over-voltage protection element and electromagnetic radiation straining element.Combination comes out just to have a variety of methods like this.Because the printed circuit board (PCB) of different manufacturers, different batches (PCB) has different parameters, so can not estimate the relative merits of the USB power supply of distinct methods and different materials and parts objectively.
Summary of the invention
In view of this, the object of the present invention is to provide the simulated test device of a kind of USB (universal serial bus) (USB) power circuit, so that under all identical situation of various external conditions, the performance of more various objectively USB power circuits makes their relative merits distincter.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
The simulated test device of a kind of USB (universal serial bus) (USB) power circuit is characterized in that this equipment comprises: power switch circuit, power interface, more than one different materials and parts the USB power circuit and and the identical load circuit of USB power circuit quantity; Wherein,
Each USB power circuit comprises: first power module of the 5VCC same power supplies that provides with computer motherboard, the second source module that the 5VSB same power supplies that provides with computer power supply is provided, power supply commutation circuit are provided; First power module links to each other with power switch circuit by power interface respectively with the second source module;
The open and close electric signal that described power switch circuit produces self sends to first power module in each USB power circuit simultaneously, controls whether out-put supply signal of first power module;
The power supply commutation circuit links to each other with a load circuit, and first power module and second source module are joined by the commutation circuit of powering; Each power supply commutation circuit has or not power supply signal output according to the first coupled power module, and whether control this first power module is coupled load circuit power supply.
Described USB power circuit can for: the power supply commutation circuit be the USB power circuit of traditional materials and parts, its first power module is connected to the second source module by a diode.
Described USB power circuit also can for: the power supply commutation circuit be the USB power circuit of south bridge or ACPI (ACPI) controller.
When described USB power circuit is ACPI controller USB power circuit, an ACPI controller switching groove can be provided on this USB power circuit, this switching groove connects an ACPI controller in test process, this ACPI controller has connected two metal-oxide-semiconductors, and two metal-oxide-semiconductors link to each other with the second source module with first power module respectively, realize the power supply switching by two metal-oxide-semiconductors of this ACPI controller control.
Described each USB power circuit can further comprise current foldback circuit, electromagnetic radiation suppresses circuit; This current foldback circuit input end links to each other with the power supply commutation circuit, and output terminal suppresses circuit with electromagnetic radiation and links to each other, and electromagnetic radiation suppresses circuit and links to each other with a described load circuit.
Described load circuit can be a USB interface, and it connects the USB device load in test process.
A plurality of 5VCC same power supplies of providing with computer motherboard of can providing can further be provided this equipment, and common power circuit with different trace width, and above-mentioned common power circuit directly connects a USB interface, and this USB interface connects the USB device load in test process.
Described each common power circuit can further comprise current foldback circuit, electromagnetic radiation suppresses circuit; This current foldback circuit input end links to each other with the 5VCC power supply, and output terminal suppresses circuit with electromagnetic radiation and links to each other, and electromagnetic radiation suppresses circuit and links to each other with described USB interface.
Described power switch circuit can further comprise on-off circuit and electrifying timing sequence mimic channel, and this on-off circuit links to each other with the electrifying timing sequence mimic channel, and the electrifying timing sequence mimic channel links to each other with first power module in each USB power circuit by power interface; This electrifying timing sequence mimic channel be used for the analog computer mainboard the switching on and shutting down sequential, power-off signal and control signal.
Described power interface further links to each other with a computer power supply, and this computer power supply provides power supply by this power interface for described first power module, second source module, common power circuit.
Described electrifying timing sequence mimic channel can further comprise: remove to tremble filtering circuit (201), negative circuit (202), negative circuit (203), negative circuit (205), negative circuit (206), negative circuit (208), adjustable delay circuit (204), adjustable delay circuit (207); Remove to tremble filtering circuit (201) and receive the switching signal that power switch circuit sends, after this switching signal process negative circuit (201), produce first signal (S5#) that is used to control the ACPI controller; This switching signal pass through negative circuit (202) again but and after delay circuit (204) time-delay, produce the secondary signal (S3#) that is used to control the ACPI controller; This switching signal pass through negative circuit (206) again but and after delay circuit (207) time-delay, pass through negative circuit (208) again, produce on the power supply, power-off signal sends to computer power supply, this power on signal sends to the ACPI controller simultaneously.
By technical scheme of the present invention as seen, the simulated test device of this USB (universal serial bus) of the present invention (USB) power circuit, the USB power circuit of distinct methods and different materials and parts is arranged on the same pcb board, realized under all identical situation of various external conditions, objective more various USB power circuit performances, and assess distinct methods and materials and parts exactly to the influence that voltage descends, make their relative merits distincter.
Description of drawings
Fig. 1 is the structured flowchart of a preferred embodiment of simulated test device of the present invention;
Fig. 2 is the structured flowchart of the electrifying timing sequence mimic channel in embodiment illustrated in fig. 1.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
The simulated test device of USB (universal serial bus) of the present invention (USB) power circuit, the USB power circuit of distinct methods and different materials and parts is arranged on the same pcb board, can be under all identical situation of various external conditions, more various objectively USB power source performances.
Referring to Fig. 1, Fig. 1 is the structured flowchart of a preferred embodiment of simulated test device of the present invention.The simulated test device of present embodiment comprises: power switch circuit 1, two different track lengths and width directly be connected a load circuit for the USB power circuit 3 of the common power circuit 2 of USB load circuit power supply, a traditional approach, USB power circuit 4, each USB power circuit of an ACPI controller control by VCC, load circuit is a usb 1 14 in the present embodiment, usb 1 14 connects the USB device load in test process, be about to usb 1 14 and draw a fixing electric current, the voltage drop on the measurement circuit then.
Wherein, power switch circuit 1 has comprised on-off circuit 102 and electrifying timing sequence mimic channel 103.
In the USB power circuit 4 of the USB power circuit 3 of two common power circuit 2, traditional approach, the control of ACPI controller; an overcurrent-overvoltage protecting circuit 112 and an electromagnetic radiation inhibition circuit 113 have all been comprised; what overcurrent-overvoltage protecting circuit 112 adopted in the present embodiment is a protective tube (FUSE), and what electromagnetic radiation suppressed circuit 113 employings is a magnetic bead.
In two common power circuit 2: VCC circuit 104 suppresses circuit 113 by overcurrent-overvoltage protecting circuit 112 and electromagnetic radiation and links to each other with usb 1 14, can be used for testing the voltage drop of circuit under different trace width or the length.
In the USB power circuit 3 of traditional approach: VCC circuit 106 links to each other by traditional approach commutation circuit 110 with VSB circuit 107; VCC links to each other with VSB by anti-phase isolating diode in the present embodiment; suppress circuit 113 by overcurrent-overvoltage protecting circuit 112 and electromagnetic radiation then and link to each other, can be used for the voltage drop of test diode, protective tube (FUSE) and magnetic bead with usb 1 14.
In the USB power circuit 4 of ACPI controller control: VCC circuit 108 links to each other by ACPI controller switching groove 111 with VSB circuit 109; ACPI controller switching groove 111 connects an ACPI controller in test process; this ACPI controller has connected two metal-oxide-semiconductors; and two metal-oxide-semiconductors link to each other with the second source module with first power module respectively; realize the power supply switching by two metal-oxide-semiconductors of this ACPI controller control; suppress circuit 113 by overcurrent-overvoltage protecting circuit 112 and electromagnetic radiation then and link to each other with usb 1 14, can be used on the test MOS pipe voltage drop and whether carry out in the handoff procedure change in voltage with the ACPI controller level and smooth.
Wherein, the switching groove of ACPI controller can adopt the mode of dual-in-line, inserts different ACPI controllers and tests.Pin according at present general several ACPI controller chips distributes the pinout such as the table one of present embodiment transfer access slot:
| 5VSB | 12V |
| C1 | S3# |
| C2 | S5# |
| CHRPMP | PW-OK |
| 5VDLEN# | 5VDRV |
| SS | 5VSBDRV |
| Reserved1 | 5VSEN |
| Reserved2 | 5VDRV# |
| Reversed3 | 5VSBDRV# |
| GND | Reversed4 |
Table one
Reversed1-4 in the pin reserves pin, can connect and draw resistance, pull down resistor or electric capacity.Because in different chips, the signal of driven MOS pipe is high effectively a bit, and some is effectively low, thus driving voltage have 5VDRV, 5VSBDRV and anti-phase after 5VDRV#, 5VSBDRV#, to satisfy the needs of different chips, other pinout is identical with the pinout of ACPI controller chip.
Because the encapsulation of FUSE and magnetic bead, in addition two metal-oxide-semiconductors is all more single,, when test, directly burn-ons and test so present embodiment does not design the switching groove for them.
This equipment has also comprised a power interface 101 in the present embodiment, it links to each other with a computer power supply, link to each other simultaneously with VCC circuit 104 in the common power circuit 2 of two different track lengths and width, and respectively with USB power circuit 4 that the USB power circuit 3 and the ACPI controller of traditional approach are controlled in VCC circuit 106,108 link to each other with VSB circuit 107,109; This computer power supply provides 5VCC and 5VSB power supply by above-mentioned this equipment that is connected to, and this power supply provides the 5VSB power supply all the time, whether provides the 5VCC power supply by power switch circuit 1 control.
Like this, when on-off circuit 102 is in closed condition, 101 of power interfaces offer the VSB power supply in the VSB circuit 107 in the USB power circuit 3 of traditional approach, with the VSB circuit 109 in the USB power circuit 4 of ACPI controller control, promptly the USB power circuit 3 of traditional approach and and the USB power circuit 4 of ACPI controller control in the person be that usb 1 14 is powered by VSB circuit 109.
When on-off circuit 102 is opened, it produces power supply and opens signal, send to electrifying timing sequence mimic channel 103 earlier, electrifying timing sequence mimic channel 103 produces the ACPI controller control signal: S5# signal and S3# signal send to the ACPI controller by ACPI controller switching groove 111, electrifying timing sequence mimic channel 103 is through after delaying time, producing power on signal sends to the ACPI controller and sends to computer power supply by power interface 101 by ACPI controller switching groove 111 respectively.Computer power supply is according to this signal output VCC power supply signal, and this VCC power supply signal sends to VCC circuit 104, VCC circuit 106, VCC circuit 108 respectively.
At this moment, the USB power circuit 3 of traditional approach is simultaneously by VCC circuit 106 and 107 power supplies of VSB circuit; In the USB power circuit 4 of ACPI controller control, after the ACPI controller is received power on signal, switch to by 108 power supplies of VCC circuit; The common power circuit 2 of two different track lengths and width works on power.
When on-off circuit 102 cuts out, it produces power supply and closes signal, send to electrifying timing sequence mimic channel 103 earlier, electrifying timing sequence mimic channel 103 produces the ACPI controller control signal: S5# signal and S3# signal send to the ACPI controller by ACPI controller switching groove 111, after the ACPI controller is received S5# signal and S3# signal, switch to by 109 power supplies of VSB circuit.Simultaneously, the power supply that sends to electrifying timing sequence mimic channel 103 closes signal through after delaying time, and produces power-off signal, sends to computer power supply by power interface 101.Computer power supply stops to export the VCC power supply signal according to this signal.
At this moment, the USB power circuit 3 of traditional approach is by 107 power supplies of VSB circuit; The USB power circuit 4 of ACPI controller control is by 109 power supplies of VSB circuit; The common power circuit 2 of two different track lengths and width, power down quits work.
In the said process, electrifying timing sequence mimic channel 103 simulated computer motherboard in the switching on and shutting down sequential on, power-off signal and S5# and S3# control signal.Referring to Fig. 2, Fig. 2 is the structured flowchart of the electrifying timing sequence mimic channel in embodiment illustrated in fig. 1.It comprises: remove to tremble filtering circuit 201, negative circuit 202, negative circuit 203, negative circuit 205, negative circuit 206, negative circuit 208, adjustable delay circuit 204, adjustable delay circuit 207; Go to tremble the switching signal that filtering circuit 201 receiving key circuit 102 send, this switching signal produces the S5# signal that is used to control the ACPI controller through after the negative circuit 202; But this switching signal through after negative circuit 203 and delay circuit 204 time-delays, produces the S3# signal that is used to control the ACPI controller again; But this switching signal through after negative circuit 206 and delay circuit 207 time-delays, is passed through negative circuit 208 more again, produces power supply electrifying, swap signal sends to computer power supply by power interface 101, and this power on signal sends to the ACPI controller simultaneously.Can adjust on S3# signal, S5# signal, the power supply by regulating the adjustable delay circuit in the present embodiment, the time-delay size between the power-off signal.
By the above embodiments as seen, the simulated test device of this USB (universal serial bus) of the present invention (USB) power circuit, the USB power circuit of distinct methods and different materials and parts is arranged on the same pcb board, realized under all identical situation of various external conditions, objective more various USB power source performances, and assess distinct methods and materials and parts exactly to the influence that voltage descends, make their relative merits distincter.
Claims (11)
1, a kind of simulated test device of general-purpose serial bus USB power circuit is characterized in that, this equipment comprises: power switch circuit, power interface, more than one different materials and parts the USB power circuit and and the identical load circuit of USB power circuit quantity; Wherein,
Each USB power circuit comprises: first power module of the 5VCC same power supplies that provides with computer motherboard, the second source module that the 5VSB same power supplies that provides with computer power supply is provided, power supply commutation circuit are provided; First power module links to each other with power switch circuit by power interface respectively with the second source module;
The open and close electric signal that described power switch circuit produces self sends to first power module in each USB power circuit simultaneously, controls whether out-put supply signal of first power module;
The power supply commutation circuit links to each other with a load circuit, and first power module and second source module are joined by the commutation circuit of powering; Each power supply commutation circuit has or not power supply signal output according to the first coupled power module, and whether control this first power module is coupled load circuit power supply.
2, simulated test device as claimed in claim 1 is characterized in that, described USB power circuit is: the power supply commutation circuit is the USB power circuit of traditional materials and parts, and its first power module is connected to the second source module by a diode.
3, simulated test device as claimed in claim 1 is characterized in that, described USB power circuit is: the power supply commutation circuit is the USB power circuit of south bridge or ACPI controller.
4, simulated test device as claimed in claim 3, it is characterized in that: when described USB power circuit is ACPI controller USB power circuit, an ACPI controller switching groove is provided on this USB power circuit, this switching groove connects an ACPI controller in test process, this ACPI controller has connected two metal-oxide-semiconductors, and two metal-oxide-semiconductors link to each other with the second source module with first power module respectively, realize the power supply switching by two metal-oxide-semiconductors of this ACPI controller control.
5, as claim 1,2,3 or 4 described simulated test devices, it is characterized in that: described each USB power circuit further comprises current foldback circuit, electromagnetic radiation suppresses circuit; This current foldback circuit input end links to each other with the power supply commutation circuit, and output terminal suppresses circuit with electromagnetic radiation and links to each other, and electromagnetic radiation suppresses circuit and links to each other with a described load circuit.
6, simulated test device as claimed in claim 5 is characterized in that: described load circuit is a USB interface, and it connects the USB device load in test process.
7, simulated test device as claimed in claim 1, it is characterized in that: a plurality of 5VCC same power supplies of providing with computer motherboard of can providing further are provided this equipment, and common power circuit with different trace width, and above-mentioned common power circuit directly connects a USB interface, and this USB interface connects the USB device load in test process.
8, simulated test device as claimed in claim 7 is characterized in that: described each common power circuit further comprises current foldback circuit, electromagnetic radiation suppresses circuit; This current foldback circuit input end links to each other with the 5VCC power supply, and output terminal suppresses circuit with electromagnetic radiation and links to each other, and electromagnetic radiation suppresses circuit and links to each other with described USB interface.
9, simulated test device as claimed in claim 7, it is characterized in that: described power switch circuit further comprises on-off circuit and electrifying timing sequence mimic channel, this on-off circuit links to each other with the electrifying timing sequence mimic channel, and the electrifying timing sequence mimic channel links to each other with first power module in each USB power circuit by power interface; This electrifying timing sequence mimic channel be used for the analog computer mainboard the switching on and shutting down sequential, power-off signal and control signal.
10, simulated test device as claimed in claim 9 is characterized in that: described power interface further links to each other with a computer power supply; This computer power supply provides power supply by this power interface for described first power module, second source module, common power circuit.
11, simulated test device as claimed in claim 10, it is characterized in that described electrifying timing sequence mimic channel further comprises: remove to tremble filtering circuit (201), negative circuit (202), negative circuit (203), negative circuit (205), negative circuit (206), negative circuit (208), adjustable delay circuit (204), adjustable delay circuit (207); Remove to tremble filtering circuit (201) and receive the switching signal that power switch circuit sends, after this switching signal process negative circuit (201), produce first signal that is used to control the ACPI controller; This switching signal pass through negative circuit (202) again but and after delay circuit (204) time-delay, produce the secondary signal that is used to control the ACPI controller; This switching signal pass through negative circuit (206) again but and after delay circuit (207) time-delay, pass through negative circuit (208) again, produce on the power supply, power-off signal sends to computer power supply by power interface (101), this power on signal sends to the ACPI controller simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031191479A CN1293472C (en) | 2003-03-14 | 2003-03-14 | Artificial tester of universal series bus power circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031191479A CN1293472C (en) | 2003-03-14 | 2003-03-14 | Artificial tester of universal series bus power circuit |
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| Publication Number | Publication Date |
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| CN1530837A CN1530837A (en) | 2004-09-22 |
| CN1293472C true CN1293472C (en) | 2007-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031191479A Expired - Fee Related CN1293472C (en) | 2003-03-14 | 2003-03-14 | Artificial tester of universal series bus power circuit |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437126C (en) * | 2005-10-20 | 2008-11-26 | 鸿富锦精密工业（深圳）有限公司 | Voltage detector of universal serial bus interface |
| CN101192184B (en) * | 2006-11-17 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Data transmitting test device and method |
| CN111224657A (en) * | 2019-12-25 | 2020-06-02 | 曙光信息产业(北京)有限公司 | Power supply switching circuit of computer USB port |
| CN112417796B (en) * | 2020-11-19 | 2023-03-21 | 海光信息技术股份有限公司 | Voltage drop analysis method and device compatible with IP circuit performance simulation and electronic equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6393588B1 (en) * | 1998-11-16 | 2002-05-21 | Windbond Electronics Corp. | Testing of USB hub |
| CN1369792A (en) * | 2000-07-14 | 2002-09-18 | 英业达股份有限公司 | Method and device for testing USB port |
-
2003
- 2003-03-14 CN CNB031191479A patent/CN1293472C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6393588B1 (en) * | 1998-11-16 | 2002-05-21 | Windbond Electronics Corp. | Testing of USB hub |
| CN1369792A (en) * | 2000-07-14 | 2002-09-18 | 英业达股份有限公司 | Method and device for testing USB port |
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| CN1530837A (en) | 2004-09-22 |
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