CN108880293A - The secondary controller and its operating method of primary side applied to power adapter - Google Patents
The secondary controller and its operating method of primary side applied to power adapter Download PDFInfo
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- CN108880293A CN108880293A CN201710333994.2A CN201710333994A CN108880293A CN 108880293 A CN108880293 A CN 108880293A CN 201710333994 A CN201710333994 A CN 201710333994A CN 108880293 A CN108880293 A CN 108880293A
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- signal
- docket
- standby
- secondary controller
- standby mode
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses the secondary controllers and its operating method of a kind of primary side applied to power adapter.The secondary controller includes a detector and a standby signal generation circuit.The detector is used to detect the first signal and the second signal of a universal serial bus, and corresponds to the frequency of the synchronization signal of the primary side of the power adapter.The standby signal generation circuit is coupled to the detector, for not detecting first signal and the second signal when the detector, and the frequency less than first preset frequency when, postpone one first predetermined time generate a standby signal to the power adapter primary side Docket No, wherein the Docket No according to the standby signal enter a standby mode.Therefore, when the universal serial bus device and the secondary controller disconnect, the present invention can make the lower power consumption of the power adapter, the Docket No and the secondary controller using the standby mode.
Description
Technical field
The present invention relates to the secondary controllers and its operating method of a kind of primary side applied to power adapter, especially relate to
And one kind can be such that the power supply turns when a universal serial bus device and the secondary controller are disconnected using a standby mode
The secondary control of the lower power consumption of the secondary controller of parallel operation, the Docket No and the primary side applied to power adapter
Device and its operating method.
Background technique
When being applied to the secondary controller of primary side of power adapter one universal serial bus device of coupling, the electricity
The Docket No of source converter, the secondary controller and the primary side applied to the power adapter can be operated one just
Norm formula.However when the universal serial bus device and the secondary controller disconnect, although the Docket No can
Make the power adapter operation in lower switching frequency, but the secondary controller and the Docket No still operate
In the normal mode, so the power consumption of the secondary controller and the Docket No will not be total because of the general serial
Line apparatus and the secondary controller are disconnected and are reduced.Therefore, how in the universal serial bus device and the secondary control
Device processed reduces the secondary controller and the power consumption of the Docket No after disconnecting become an important energy saving project.
Summary of the invention
One embodiment of the invention discloses a kind of secondary controller of primary side applied to power adapter.The secondary
Controller includes a detector and a standby signal generation circuit.The detector is for detecting a universal serial bus
The first signal and the second signal of (Universal Serial Bus, USB), and the primary side of the corresponding power adapter
Synchronization signal frequency.The standby signal generation circuit is coupled to the detector, for not examining when the detector
When measuring first signal and the second signal and the frequency less than first preset frequency, delay one first is pre-
Fix time generate a standby signal to the power adapter primary side Docket No, wherein the Docket No root
Enter a standby mode according to the standby signal.
Another embodiment of the present invention discloses a kind of operation of the secondary controller of primary side applied to power adapter
Method, wherein the secondary controller includes a detector, a standby signal generation circuit and a comparator.The method includes
The detector detects the first signal and the second signal of a universal serial bus, and the primary of the corresponding power adapter
The frequency of the synchronization signal of side；When the detector does not detect first signal and the second signal and described
When frequency is less than first preset frequency, the standby signal generation circuit postpones one first predetermined time generation, one standby signal
To the Docket No of the primary side of the power adapter, wherein the Docket No enters one according to the standby signal
Standby mode.
The present invention discloses the secondary controller and its operating method of a kind of primary side applied to power adapter.Described time
Grade controller and the operating method are when a universal serial bus device is not detected in the detector of the secondary controller
The detector of first signal and second signal and the secondary controller detects the primary side of the corresponding power adapter
Synchronization signal frequency less than first preset frequency when, judge the universal serial bus device and the secondary controller
It disconnects.Judge that the universal serial bus device and the secondary controller are disconnected in the secondary controller and the operating method
After opening, the secondary controller and the operating method allow the secondary controller and the Docket No to enter a standby mould
Formula, wherein after the secondary controller and the Docket No enter the standby mode, the secondary controller and described
Docket No only opens circuit related with the standby mode.Therefore, compared to the prior art, because of the secondary control
After device and the Docket No enter the standby mode, the secondary controller and Docket No is only opened and institute
The related circuit of standby mode is stated, so when the universal serial bus device and the secondary controller disconnect, the present invention
Make the lower power consumption of the power adapter, the Docket No and the secondary controller using the standby mode.
Detailed description of the invention
Fig. 1 is a kind of secondary control of the primary side applied to power adapter disclosed in the first embodiment of the present invention
The schematic diagram of device.
Fig. 2 is to illustrate that Docket No and secondary controller enter the operation timing signal of standby mode from normal mode
Figure.
Fig. 3 is to illustrate Docket No and secondary controller operation in the operation timing schematic diagram of standby mode.
Fig. 4-8 is to illustrate that Docket No and secondary controller show from the operation timing that standby mode enters normal mode
It is intended to.
Fig. 9 A and Fig. 9 B are a kind of primary sides applied to power adapter disclosed in the second embodiment of the present invention
The flow chart of the operating method of secondary controller.
Wherein, the reference numerals are as follows：
100 power adapters
102 synchronous switches
104 power switch
106 photo-couplers
108 windings
200 secondary controllers
202,306 detector
204 standby signal generation circuits
206 comparators
208,210,212,214,216,302 pin
300 Docket Nos
304 grid control signal generation circuits
CS current detecting pin
COMP compensation pin
FB feedback pin
The first signal of FS
FCS comparison signal
The first preset frequency of FPF
First predetermined time of FPT
The first reference voltage of FVREF
GND1, GND2 ground terminal
GCS grid control signal
IOUT exports electric current
LS leaves signal
OTP over-temperature protection pin
PRI primary side
QRD rising edge
QRDR falling edge
SEC primary side
SS second signal
SYN synchronization signal
STS standby signal
The second reference voltage of SVREF
Second predetermined time of SPT
The TPT third predetermined time
TVREF third reference voltage
TS open signal
T1, T2, T3, T4, T5 time
UVLOOFF low-voltage is locked and closed voltage
UVLOON low-voltage locks cut-in voltage
VOUT output voltage
VCS detects voltage
900-920 step
Specific embodiment
Fig. 1 is please referred to, Fig. 1 is a kind of time applied to power adapter 100 disclosed in the first embodiment of the present invention
The schematic diagram of the secondary controller 200 of grade side SEC, wherein power adapter 100 is an ac/dc power adapter.Such as Fig. 1
Shown, secondary controller 200 includes a detector 202, a standby signal generation circuit 204 and a comparator 206, wherein to
Machine signal generating circuit 204 is coupled to detector 202 and comparator 206 is coupled to detector 202 and standby signal generates electricity
Road 204.As shown in Figure 1, detector 202 is for detecting a general serial by the pin 208,210 of secondary controller 200 respectively
The first signal FS and second signal SS of bus (Universal Serial Bus, USB) device, wherein the first signal FS and
Binary signal SS is a differential-pair signal, such as the first signal FS and second signal SS may respectively be universal serial bus 2.0 editions A
Differential-pair signal Data+, Data- of type or Type B.But in another embodiment of the invention, the first signal FS and second signal
SS may respectively be universal serial bus 3.x editions A type or Type B differential-pair signal Data+, Data- or Hypervelocity Launcher it is poor
It moves to signal (Superspeed transmitter differential pair) StdB_SSTX+, StdB_SSTX-, or super
High-speed receiver differential-pair signal (Superspeed receiver differential pair) StdB_SSRX+, StdB_
SSRX-, wherein x is 0 or 1.In addition, in another embodiment of the invention, the first signal FS and second signal SS may respectively be
Differential-pair signal Dp1, Dn1 or Hypervelocity Launcher differential-pair signal SSTXp1 of the c-type that universal serial bus is 3.1 editions,
SSTXn1 or ultrahigh speed receiver differential-pair signal SSRXp1, SSRXn1.In addition, as shown in Figure 1, detector 202 is also used for leading to
Cross secondary controller 200 pin 212 be coupled to power adapter 100 primary side SEC a synchronous switch 102 drain electrode with
The frequency of the synchronization signal SYN of the primary side PRI of corresponding power converter 100 is detected, wherein synchronous switch 102 can ensure that power supply
The primary side PRI of converter 100 and the primary side SEC of power adapter 100 will not be opened simultaneously.
As shown in Figure 1, when secondary controller 200 couples the universal serial bus device (not being illustrated in Fig. 1), it is secondary
The Docket No 300 of controller 200 and the primary side PRI applied to power adapter 100 can be such that power adapter 100 operates
In a normal mode.However as shown in Fig. 2, when the universal serial bus device is disconnected in time T1 and secondary controller 200
When, detector 202 will not detect the first signal FS and second signal SS of the universal serial bus device.At this point, because
It is not coupled to the universal serial bus device for the primary side SEC of power adapter 100, so a grid control signal GCS
Frequency will reduce, wherein grid control signal GCS is that the power for controlling the primary side PRI of power adapter 100 is opened
It closes 104 to open and close, and because synchronization signal SYN is corresponding grid control signal GCS, the frequency of synchronization signal SYN
Rate can also be reduced as the frequency of grid control signal GCS reduces.As shown in Fig. 2, when detector 200 detects synchronization signal
When the frequency of SYN is less than one first preset frequency FPF, standby signal generation circuit 204 will postpone one first predetermined time FPT in
Time T2 generates a standby signal STS, and wherein standby signal STS is the pin 214 and an optical coupling by secondary controller 200
Device 106 is sent to Docket No 300, and the first predetermined time FPT is for preventing standby signal generation circuit 204 because accidentally touching
Hair generates standby signal STS, and standby signal STS is a digital signal.But in another embodiment of the invention, standby signal
STS is an analog signal or a mixed mode (mixed-mode) signal.In addition, as shown in Fig. 2, because standby signal STS is
It is sent to Docket No 300 by pin 214 and photo-coupler 106, so the pin 302 of Docket No 300 will connect
Receive a pair of of induction signal of corresponding standby signal STS.As shown in Fig. 2, after secondary controller 200 generates standby signal STS, secondary control
Device 200 processed enters a standby mode in time T3, and after secondary controller 200 enters the standby mode, secondary controller
200 will close the circuit other than 200 internal detector 202 of secondary controller, standby signal generation circuit 204 and comparator 206.
In addition, the first preset frequency FPF can be by the minimum of grid control signal GCS of the power adapter 100 under the normal mode
Operating frequency determines, such as the first preset frequency FPF can be the minimum operation frequency (such as 1.5KHz) of grid control signal GCS
1.5-2 times, wherein the minimum operation frequency of grid control signal GCS is the primary side SEC for improving power adapter 100
When being not coupled to a load, the output voltage of the primary side SEC of power adapter 100 floats high problem.But the present invention not by
The minimum operation frequency for being limited to grid control signal GCS is 1.5KHz.
In addition, as shown in Fig. 2, standby signal generation circuit 204 generate standby signal STS after, because of power adapter
The output voltage VO UT of 100 primary side SEC will be controlled by secondary controller 200, so the grid of Docket No 300 controls
Signal generating circuit 304 can generate grid control before Docket No 300 enters the standby mode according to standby signal STS
Signal GCS is to promote output voltage VO UT, and wherein grid control signal GCS is transmitted by the pin 306 of Docket No 300
To power switch 104.Therefore, as shown in Fig. 2, Docket No 300 can enter the standby mode in time T4.
Referring to figure 3., Fig. 3 illustrates after Docket No 300 and secondary controller 200 enter the standby mode
The schematic diagram in operation timing.As shown in figure 3, comparator 206 can examined after secondary controller 200 enters the standby mode
After surveying the rising edge QRD that device 202 detects synchronization signal SYN, compare output voltage VO UT and one first reference voltage FVREF
(such as 4.9V or 5.1V) and compare output voltage VO UT and one second reference voltage SVREF (such as 4.8V) until detector
200 detect the falling edge QRDR of synchronization signal SYN.But the present invention be not limited to the first reference voltage FVREF be 4.9V or
5.1V and the second reference voltage SVREF is 4.8V.Therefore, as shown in figure 3, in time T1, when output voltage VO UT is less than
One reference voltage FVREF and when being greater than the second reference voltage SVREF, comparator 206 generates a comparison signal FCS to standby letter
Number generation circuit 204 and standby signal generation circuit 204 generate an open signal TS according to comparison signal FCS, wherein opening
Signal TS is that Docket No 300 is sent to by the pin 214 and photo-coupler 106 of secondary controller 200, and such as Fig. 3
Shown, open signal TS has a predetermined duty ratio.In addition, the purpose of open signal TS is for maintaining power adapter 100
Primary side SEC output voltage VO UT.As shown in figure 3, the pin 302 in Docket No 300 receives corresponding open signal
TS to induction signal after, when corresponded on pin 302 open signal TS to induction signal less than a third reference voltage TVREF (when
Between T2) when, grid control signal generation circuit 304 generates grid control signal GCS to power switch 104, wherein when corresponding diagram 3
Between enabling time of grid control signal GCS of T2 the detection voltage VCS of the primary side PRI of power adapter 100 can be made to reach
One minimum value (such as 0.3V), and the frequency of grid control signal GCS is tens of Hertz (Hz) in the standby mode.
Referring to figure 4., Fig. 4 is to illustrate Docket No 300 and secondary controller 200 from described in standby mode entrance
The schematic diagram in the operation timing of normal mode.As shown in figure 4, Docket No 300 and secondary controller 200 enter it is described to
After machine mode, if output voltage VO UT is closed in time T1 lower than low-voltage locking (under voltage lock out)
Voltage UVLOOFF, then secondary controller 200 is closed.Therefore, as shown in figure 4, grid control signal generation circuit 304 in when
Between T2 (because pin 302 on correspond to open signal TS to induction signal be less than third reference voltage TVREF), generate grid control
After signal GCS to power switch 104, if the detector 306 in Docket No 300 is after grid control signal GCS
Open signal TS caused by corresponding standby signal generation circuit 204 is not detected in one second predetermined time SPT (such as 1 second)
To induction signal when, then Docket No 300 will actively leave the standby mode into the normal mode in time T3,
In the second predetermined time SPT can by the winding 108 of the primary side SEC of power adapter 100, output voltage VO UT and output electric current
IOUT is determined.As shown in figure 4, output voltage VO UT starts to increase after Docket No 300 enters the normal mode.?
Time T4, when output voltage VO UT be greater than a low-voltage locking cut-in voltage UVLOON when, secondary controller 200 reopen into
Enter the normal mode.In addition, Docket No 300 will close primary after Docket No 300 enters the standby mode
The circuit other than detector 306 and grid control signal generation circuit 304 in controller 300, that is to say, that Docket No
300 will close circuit unrelated with the standby mode in Docket No 300.Such as shown in Figure 1, Docket No
300 will close coupling one feedback pin FB, a compensation pin COMP, an over-temperature protection pin OTP in Docket No 300
With the circuit (not being illustrated in Fig. 1) of a current detecting pin CS, the wherein level and secondary of the ground terminal GND2 of Docket No 300
The level of the ground terminal GND1 of controller 200 can be identical or different.
Referring to figure 5., Fig. 5 is to illustrate Docket No 300 and secondary controller 200 from described in standby mode entrance
The schematic diagram in the operation timing of normal mode.As shown in figure 5, Docket No 300 and secondary controller 200 enter it is described to
After machine mode, when output voltage VO UT between the first reference voltage FVREF and the second reference voltage SVREF and it is synchronous letter
When the frequency of number SYN is greater than one second preset frequency (such as 10KHz), because the frequency of synchronization signal SYN is greater than described second
One load of primary side SEC coupling of predetermined frequency representation Docket No 300, so the standby signal of secondary controller 200 produces
Raw circuit 204 will generate one in time T1 and leave signal LS, wherein leaving signal LS is the pin by secondary controller 200
214 and photo-coupler 106 be sent to Docket No 300, second preset frequency can be determined by time T1 and time T2, with
And as shown in figure 5, signal LS is left with a maximum enabling time and leaves the enabling time of signal LS greater than open signal TS
Enabling time.But it is 10KHz that the present invention, which is not limited to second preset frequency,.As shown in figure 5, in Docket No
300 pin 302 receive it is corresponding leave signal LS to induction signal after, when the corresponding letter for leaving signal LS corresponding on pin 302
Number be less than third reference voltage TVREF (time T3) when, grid control signal generation circuit 304 generate grid control signal GCS
To power switch 104.As shown in figure 5, when it is corresponding leave signal LS mono- third of third reference voltage TVREF is less than to induction signal
(wherein third predetermined time TPT is less than the maximum enabling time for leaving signal LS and not less than open signal TS predetermined time TPT
Length) when, grid control signal generation circuit 304 generates grid control signal GCS and Docket No 300 in time T4
The standby mode is left into the normal mode according to the grid control signal GCS of corresponding time T4.At this time because of secondary control
When the detector 202 of device 200 processed also detects that the synchronization signal SYN of corresponding time T4, so 204 meeting of standby signal generation circuit
Signal LS is left according to the synchronization signal SYN closing of corresponding time T4 in time T5.In addition, in standby signal generation circuit 204
After signal LS is left in closing, secondary controller 200 leaves the standby mode into the normal mode.
Fig. 6 is please referred to, Fig. 6 is to illustrate Docket No 300 and secondary controller 200 from described in standby mode entrance
The schematic diagram in the operation timing of normal mode.As shown in fig. 6, Docket No 300 and secondary controller 200 enter it is described to
After machine mode, if output voltage VO UT in open signal TS less than the second reference voltage SVREF, because of output voltage
VOUT indicates one heavy duty of primary side SEC coupling of Docket No 300 (because of the heavy duty less than the second reference voltage SVREF
Can make output voltage VO UT rapid decrease), so the standby signal generation circuit 204 of secondary controller 200 can be in open signal
(that is time T1) generation leaves signal LS to Docket No 300 after TS, that is to say, that if in open signal TS
Output voltage VO UT is less than the second reference voltage SVREF, then standby signal generation circuit 204 still can be after open signal TS
(that is time T1) generation leaves signal LS to Docket No 300.As shown in fig. 6, in the pin of Docket No 300
302 receive it is corresponding leave signal LS to induction signal after, when on pin 302 it is corresponding leave signal LS third is less than to induction signal
When reference voltage TVREF (time T2), grid control signal generation circuit 304 generates grid control signal GCS to power switch
104.As shown in fig. 6, when it is corresponding leave signal LS third reference voltage TVREF third predetermined time TPT is less than to induction signal
When, grid control signal generation circuit 304 generates grid control signal GCS and Docket No 300 according to correspondence in time T3
The grid control signal GCS of time T3 leaves the standby mode into the normal mode.At this time because of secondary controller 200
Detector 202 when also detecting that the synchronization signal SYN of corresponding time T3, so standby signal generation circuit 204 can be in the time
T4 leaves signal LS according to the synchronization signal SYN closing of corresponding time T3.In addition, standby signal generation circuit 204 close from
After ON signal LS, secondary controller 200 leaves the standby mode into the normal mode.
Fig. 7 is please referred to, Fig. 7 is to illustrate Docket No 300 and secondary controller 200 from described in standby mode entrance
The schematic diagram in the operation timing of normal mode.As shown in fig. 7, Docket No 300 and secondary controller 200 enter it is described to
After machine mode, when detector 202 detects the first signal FS and second signal SS in time T1, because time T1 is opening letter
After number TS, so standby signal generation circuit 204 will be generated in time T1 leave signal LS to Docket No 300.Such as Fig. 7 institute
Show, Docket No 300 pin 302 receive it is corresponding leave signal LS to induction signal after, when correspondence is left on pin 302
When being less than third reference voltage TVREF (time T2) to induction signal of signal LS, grid control signal generation circuit 304 generates grid
Pole controls signal GCS to power switch 104.As shown in fig. 7, leaving the electric less than third reference to induction signal of signal LS when corresponding
Press TVREF third predetermined time TPT when, grid control signal generation circuit 304 in time T3 generate grid control signal GCS and
Docket No 300 leaves the standby mode into the normal mode according to the grid control signal GCS of corresponding time T3.
At this time because when the detector 202 of secondary controller 200 also detects that the synchronization signal SYN of corresponding time T3, standby letter
Number generation circuit 204 can leave signal LS according to the synchronization signal SYN closing of corresponding time T3 in time T4.In addition, standby
After signal LS is left in the closing of signal generating circuit 204, secondary controller 200 leaves the standby mode into the normal mode
Formula.
Fig. 8 is please referred to, Fig. 8 is to illustrate Docket No 300 and secondary controller 200 from described in standby mode entrance
The schematic diagram in the operation timing of normal mode.As shown in figure 8, Docket No 300 and secondary controller 200 enter it is described to
After machine mode, when detector 202 detects the first signal FS and second signal SS in time T1, but because time T1 is being opened
In signal TS, so standby signal generation circuit 204 (that is time T2) generation will leave signal after open signal TS
LS is to Docket No 300.As shown in figure 8, the pin 302 in Docket No 300 receives the corresponding correspondence for leaving signal LS
After signal, when being less than third reference voltage TVREF (time T3) to induction signal of signal LS, grid are left when corresponding on pin 302
Pole controls signal generating circuit 304 and generates grid control signal GCS to power switch 104.As shown in figure 8, when correspondence leaves letter
When being less than third reference voltage TVREF third predetermined time TPT to induction signal of number LS, grid control signal generation circuit 304
Grid control signal GCS and Docket No 300 is generated in time T4 to be left according to the grid control signal GCS of corresponding time T4
The standby mode enters the normal mode.At this time because the detector 202 of secondary controller 200 also detects that the corresponding time
When the synchronization signal SYN of T4, so standby signal generation circuit 204 can be in time T5 according to the synchronization signal of corresponding time T4
Signal LS is left in SYN closing.In addition, standby signal generation circuit 204 closing leave signal LS after, secondary controller 200 from
The standby mode is opened into the normal mode.
Fig. 1-2,4-8,9A, 9B are please referred to, Fig. 9 A and Fig. 9 B figure is that one kind disclosed in the second embodiment of the present invention is answered
The flow chart of the operating method of the secondary controller of primary side for power adapter.The operating method of Fig. 9 A and Fig. 9 B figure is
Illustrate that detailed step is as follows using the power adapter 100, secondary controller 200 and Docket No 300 of Fig. 1：
Step 900：Start；
Step 902：Secondary controller 200 is coupled to the universal serial bus device；
Step 904：Secondary controller 200 and the operation of Docket No 300 are in the normal mode；
Step 906：Whether detector 202 does not detect the first signal FS and second of the universal serial bus device
Signal SS, and whether detect the frequency of synchronization signal SYN less than the first preset frequency FPF；If so, carrying out step 908；
If not, jumping back to step 904；
Step 908：Secondary controller 200 and Docket No 300 are operated accordingly in the standby mode, carry out step
910, step 914, step 916 and step 918；
Step 910：Whether detector 306 is not detected in the second predetermined time SPT after grid control signal GCS pair
Answer open signal TS caused by standby signal generation circuit 204 to induction signal；If so, carrying out step 912；If not,
Jump back to step 908；
Step 912：Docket No 300 actively leaves the standby mode into the normal mode, and secondary control
Device 200 processed re-operates after the normal mode in Docket No 300, into the normal mode；
Step 914：When output voltage VO UT is between the first reference voltage FVREF and the second reference voltage SVREF,
Whether detector 202 detects that the frequency of synchronization signal SYN is greater than the second preset frequency；If so, carrying out step 920；If
It is no, jump back to step 908；
Step 916：Whether detector 202 detects output voltage VO UT less than the second reference voltage SVREF；If so,
Carry out step 920；If not, jumping back to step 908；
Step 918：Whether detector 202 detects the first signal FS and second signal of the universal serial bus device
SS；If so, carrying out step 920；If not, jumping back to step 908；
Step 920：The generation of standby signal generation circuit 204 leaves signal LS to Docket No 300 and primary control
Device 300 leaves the standby mode into the normal mode accordingly, and wherein secondary controller 200 is in 300 weight of Docket No
New operation is after the normal mode, into the normal mode.
In step 902 and step 904, (it is not illustrated in when secondary controller 200 couples the universal serial bus device
When Fig. 1), secondary controller 200 and Docket No 300 can make the running of power adapter 100 in the normal mode.
In step 908, as shown in Fig. 2, however as shown in Fig. 2, when the universal serial bus device in time T1 and
When secondary controller 200 disconnects, detector 202 will not detect the first signal FS and the of the universal serial bus device
Binary signal SS.At this point, because the primary side SEC of power adapter 100 is not coupled to the universal serial bus device, grid
The frequency of pole control signal GCS will reduce, and because synchronization signal SYN is corresponding grid control signal GCS, synchronous
The frequency of signal SYN can also be reduced as the frequency of grid control signal GCS reduces.As shown in Fig. 2, when detector 200 is examined
When measuring the frequency of synchronization signal SYN less than the first preset frequency FPF, standby signal generation circuit 204 makes a reservation for delay first
Time FPT generates standby signal STS in time T2, and wherein standby signal STS is 214 He of pin by secondary controller 200
Photo-coupler 106 is sent to Docket No 300, and standby signal STS is a digital signal.But in another implementation of the invention
In example, standby signal STS is an analog signal or a mixed mode signal.In addition, as shown in Fig. 2, because standby signal STS is
It is sent to Docket No 300 by pin 214 and photo-coupler 106, so the pin 302 of Docket No 300 will connect
Receive corresponding standby signal STS to induction signal.As shown in Fig. 2, after secondary controller 200 generates standby signal STS, secondary control
Device 200 enters the standby mode in time T3, and after secondary controller 200 enters the standby mode, secondary controller
200 will close the circuit other than 200 internal detector 202 of secondary controller, standby signal generation circuit 204 and comparator 206.
In addition, as shown in Fig. 2, standby signal generation circuit 204 generate standby signal STS after, because of power adapter
The output voltage VO UT of 100 primary side SEC will be controlled by secondary controller 200, so the grid of Docket No 300 controls
Signal generating circuit 304 can generate grid control before Docket No 300 enters the standby mode according to standby signal STS
Signal GCS is to promote output voltage VO UT, and wherein grid control signal GCS is transmitted by the pin 306 of Docket No 300
To power switch 104.Therefore, as shown in Fig. 2, Docket No 300 can enter the standby mode in time T4.
In step 912, as shown in figure 4, entering the standby mode in Docket No 300 and secondary controller 200
Afterwards, if output voltage VO UT closes voltage lower than low-voltage locking (under voltage lock out) in time T1
UVLOOFF, then secondary controller 200 is closed.Therefore, as shown in figure 4, in grid control signal generation circuit 304 in time T2
(because pin 302 on correspond to open signal TS to induction signal be less than third reference voltage TVREF), generation grid control signal
After GCS to power switch 104, if the detector 306 in Docket No 300 is second pre- after grid control signal GCS
The interior corresponding letter that open signal TS caused by corresponding standby signal generation circuit 204 is not detected of the SPT (such as 1 second) that fixes time
Number when, then Docket No 300 will actively leave the standby mode into the normal mode in time T3.As shown in figure 4,
After Docket No 300 enters the normal mode, output voltage VO UT starts to increase.In time T4, work as output voltage
When VOUT is greater than low-voltage locking cut-in voltage UVLOON, secondary controller 200 is reopened into the normal mode.Separately
Outside, after Docket No 300 enters the standby mode, Docket No 300 will close the detection in Docket No 300
Circuit other than device 306 and grid control signal generation circuit 304.
In step 914, as shown in figure 5, entering the standby mode in Docket No 300 and secondary controller 200
Afterwards, when detector 202 detects output voltage VO UT between the first reference voltage FVREF and the second reference voltage SVREF
And the frequency of synchronization signal SYN be greater than the second preset frequency (such as 10KHz) when because the frequency of synchronization signal SYN is greater than
The second predetermined frequency representation Docket No 300 primary side SEC coupling one load, so secondary controller 200 to
Machine signal generating circuit 204 will generate in time T1 and leave signal LS, wherein leaving signal LS is by secondary controller 200
Pin 214 and photo-coupler 106 are sent to Docket No 300.As shown in figure 5, the pin 302 in Docket No 300 connects
Receive it is corresponding leave signal LS to induction signal after, leave third is less than to induction signal referring to for signal LS when corresponding on pin 302
When voltage TVREF (time T3), grid control signal generation circuit 304 generates grid control signal GCS to power switch 104.
As shown in figure 5, grid control signal generation circuit 304 generates grid control signal GCS and Docket No 300 in time T4
The standby mode is left into the normal mode according to the grid control signal GCS of corresponding time T4.Standby signal produces at this time
Raw circuit 204 can leave signal LS according to the synchronization signal SYN closing of corresponding time T4 in time T5.In addition, in standby signal
After signal LS is left in the closing of generation circuit 204, secondary controller 200 leaves the standby mode into the normal mode.
In step 916, as shown in fig. 6, entering the standby mode in Docket No 300 and secondary controller 200
Afterwards, if output voltage VO UT in open signal TS less than the second reference voltage SVREF because output voltage VO UT is less than
Second reference voltage SVREF indicates the primary side SEC coupling heavy duty of Docket No 300 (because the heavy duty can make output electricity
Press VOUT rapid decrease), so the standby signal generation circuit 204 of secondary controller 200 can be after open signal TS (namely
Say time T1) it generates and leaves signal LS to Docket No 300, that is to say, that if the output voltage VO UT in open signal TS
Less than the second reference voltage SVREF, then standby signal generation circuit 204 still can after open signal TS (that is time
T1 it) generates and leaves signal LS to Docket No 300.As shown in fig. 6, Docket No 300 pin 302 receive it is corresponding from
ON signal LS to induction signal after, when on pin 302 it is corresponding leave signal LS third reference voltage TVREF is less than to induction signal
When (time T2), grid control signal generation circuit 304 generates grid control signal GCS to power switch 104.As shown in fig. 6,
When being less than third reference voltage TVREF third predetermined time TPT to induction signal of signal LS, grid control signal are left when corresponding
Generation circuit 304 generates grid control signal GCS in time T3 and Docket No 300 is according to the grid control for corresponding to time T3
Signal GCS leaves the standby mode into the normal mode.At this time because the detector 202 of secondary controller 200 is also examined
When measuring the synchronization signal SYN of corresponding time T3, so standby signal generation circuit 204 can be in time T4 according to corresponding time T3
Synchronization signal SYN closing leave signal LS.In addition, after signal LS is left in the closing of standby signal generation circuit 204, secondary control
Device 200 processed leaves the standby mode into the normal mode.
In step 918, as shown in fig. 7, entering the standby mode in Docket No 300 and secondary controller 200
Afterwards, when detector 202 detects the first signal FS and second signal SS in time T1, because time T1 is in open signal TS
Afterwards, so standby signal generation circuit 204 will be generated in time T1 leaves signal LS to Docket No 300.As shown in fig. 7,
Docket No 300 pin 302 receive it is corresponding leave signal LS to induction signal after, when correspondence leaves letter on pin 302
When being less than third reference voltage TVREF (time T2) to induction signal of number LS, grid control signal generation circuit 304 generates grid
Signal GCS is controlled to power switch 104.As shown in fig. 7, when it is corresponding leave signal LS third reference voltage is less than to induction signal
When TVREF third predetermined time TPT, grid control signal generation circuit 304 in time T3 generate grid control signal GCS and just
Grade controller 300 leaves the standby mode into the normal mode according to the grid control signal GCS of corresponding time T3.This
When the detector 202 of Shi Yinwei secondary controller 200 also detects that the synchronization signal SYN of corresponding time T3, so standby signal
Generation circuit 204 can leave signal LS according to the synchronization signal SYN closing of corresponding time T3 in time T4.In addition, in standby letter
After signal LS is left in the closing of number generation circuit 204, secondary controller 200 leaves the standby mode into the normal mode.
In addition, as shown in figure 8, working as inspection after Docket No 300 and secondary controller 200 enter the standby mode
Device 202 is surveyed when time T1 detects the first signal FS and second signal SS, but because of time T1 in open signal TS,
Standby signal generation circuit 204 (that is time T2) generation will leave signal LS to Docket No after open signal TS
300.And standby signal generation circuit 204 generation leave signal LS to Docket No 300 after, Docket No 300 and time
The operating principle of grade controller 200 is identical with Fig. 7, and details are not described herein.
In conclusion secondary controller and its operation side of the primary side disclosed in this invention applied to power adapter
Method be when the first signal and second signal of the universal serial bus device is not detected in the detector of the secondary controller,
And the detector of the secondary controller detects that the frequency of the synchronization signal of the primary side of the corresponding power adapter is small
When first preset frequency, judge that the universal serial bus device and the secondary controller disconnect.In the secondary
After controller and the operating method judge that the universal serial bus device and the secondary controller disconnect, the secondary control
Device processed and the operating method allow the secondary controller and the Docket No to enter the standby mode, wherein described time
After grade controller and the Docket No enter the standby mode, the secondary controller and the Docket No are only opened
Open circuit related with the standby mode.Therefore, compared to the prior art, because of the secondary controller and the primary control
After device processed enters the standby mode, the secondary controller and the Docket No are only opened related with the standby mode
Circuit, so the present invention can utilize described standby when the universal serial bus device and the secondary controller disconnect
Mode makes the lower power consumption of the power adapter, the Docket No and the secondary controller.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (23)
1. a kind of secondary controller of the primary side applied to power adapter, includes：
One detector, for detecting the first signal and the second signal of a universal serial bus, and the corresponding power supply conversion
The frequency of the synchronization signal of the primary side of device；And
It is characterized in that also including：
One standby signal generation circuit, is coupled to the detector, for not detecting first letter when the detector
When number with the second signal and the frequency less than first preset frequency, one first predetermined time of delay generate one to
Machine signal to the power adapter primary side Docket No, wherein the Docket No is according to the standby signal
Into a standby mode.
2. secondary controller as described in claim 1, it is characterised in that：The secondary controller generates the standby signal
Afterwards, the secondary controller enters the standby mode, and after the secondary controller enters the standby mode, and described time
Grade controller is closed other than the detector in the secondary controller, the standby signal generation circuit and the comparator
Circuit.
3. secondary controller as described in claim 1, it is characterised in that：First signal and the second signal are one poor
It moves to signal.
4. secondary controller as described in claim 1, it is characterised in that：The standby signal is an analog signal, a number
Signal or a mixed mode signal.
5. secondary controller as described in claim 1, it is characterised in that additionally comprise：
One comparator, after for detecting the rising edge of the synchronization signal when the detector, the power adapter
Primary side output voltage with one first reference voltage and compared with described in output voltage and one second reference voltage until institute
State the falling edge that detector detects the synchronization signal.
6. secondary controller as claimed in claim 5, it is characterised in that：When the output voltage is between the first reference electricity
When between pressure and second reference voltage, comparator one comparison signal of generation to the standby signal generation circuit, with
And the standby signal generation circuit generates an open signal to the Docket No according to the comparison signal.
7. secondary controller as claimed in claim 6, it is characterised in that：The standby signal generation circuit generates the unlatching
After signal to the Docket No, the grid control signal generation circuit in the Docket No generates a grid accordingly
Control signal to the power adapter primary side power switch, and the power switch is according to the grid control signal
It opens and closes.
8. secondary controller as claimed in claim 7, it is characterised in that：Institute is generated in the grid control signal generation circuit
After stating grid control signal, if a detector in the Docket No is in being not detected correspondence in one second predetermined time
When a pair of of induction signal of the open signal, the Docket No actively leaves the standby mode.
9. secondary controller as claimed in claim 8, it is characterised in that：When the Docket No enters the standby mode
Afterwards, the Docket No is closed other than the detector in the secondary controller and the grid control signal generation circuit
Circuit.
10. secondary controller as claimed in claim 5, it is characterised in that：When the output voltage is less than second reference
When voltage, the standby signal generation circuit generates one after its generated open signal and leaves signal to the primary control
Device processed and the Docket No leave the standby mode accordingly, wherein the secondary controller can be with the primary
Controller leaves the standby mode and leaves the standby mode.
11. secondary controller as claimed in claim 5, it is characterised in that：When the output voltage is between first reference
Between voltage and second reference voltage and when the frequency is greater than second preset frequency, the standby signal generates electricity
One is generated after an open signal caused by Lu Yuqi leaves signal to the Docket No and the Docket No evidence
This leaves the standby mode, wherein the secondary controller standby mode can be left with the Docket No and from
Open the standby mode.
12. secondary controller as described in claim 1, it is characterised in that：When the detector detects first signal
When with the second signal, the standby signal generation circuit generates one after its generated open signal and leaves signal extremely
The Docket No and the Docket No leave the standby mode accordingly, wherein the secondary controller can be with
The Docket No leave the standby mode and leave the standby mode.
13. a kind of operating method of the secondary controller of the primary side applied to power adapter, wherein the secondary controller
Include comprising a detector, a standby signal generation circuit and a comparator, the method：
The detector detects the first signal and the second signal of a universal serial bus, and corresponds to the power adapter
The frequency of the synchronization signal of primary side；And
It is characterized in that also including：
When the detector does not detect that first signal and the second signal and the frequency are pre- less than one first
When determining frequency, the standby signal generation circuit postpones one first predetermined time, one standby signal of generation to the power adapter
Primary side Docket No, wherein the Docket No according to the standby signal enter a standby mode.
14. operating method as claimed in claim 13, it is characterised in that：The secondary controller generates the standby signal
Afterwards, the secondary controller enters the standby mode, and after the secondary controller enters the standby mode, and described time
Grade controller is closed other than the detector in the secondary controller, the standby signal generation circuit and the comparator
Circuit.
15. operating method as claimed in claim 13, it is characterised in that：First signal and the second signal are one poor
It moves to signal.
16. operating method as claimed in claim 13, it is characterised in that additionally comprise：
After the detector detects the rising edge of the synchronization signal, time of the comparator power adapter
The output voltage of grade side with one first reference voltage and compared with described in output voltage and one second reference voltage until the inspection
Survey the falling edge that device detects the synchronization signal.
17. operating method as claimed in claim 16, it is characterised in that：When the output voltage is between the first reference electricity
When between pressure and second reference voltage, comparator one comparison signal of generation to the standby signal generation circuit, with
And the standby signal generation circuit generates an open signal to the Docket No according to the comparison signal.
18. operating method as claimed in claim 17, it is characterised in that：The standby signal generation circuit generates the unlatching
After signal to the Docket No, the grid control signal generation circuit in the Docket No generates a grid accordingly
Control signal to the power adapter primary side power switch, and the power switch is according to the grid control signal
It opens and closes.
19. operating method as claimed in claim 18, it is characterised in that：Institute is generated in the grid control signal generation circuit
After stating grid control signal, if a detector in the Docket No is in being not detected correspondence in one second predetermined time
When a pair of of induction signal of the open signal, the Docket No actively leaves the standby mode.
20. operating method as claimed in claim 19, it is characterised in that：When the Docket No enters the standby mode
Afterwards, the Docket No is closed other than the detector in the secondary controller and the grid control signal generation circuit
Circuit.
21. operating method as claimed in claim 16, it is characterised in that：When the output voltage is less than described second with reference to electricity
When pressure, the standby signal generation circuit generates one after its generated open signal and leaves signal to the primary control
Device and the Docket No leave the standby mode accordingly, wherein the secondary controller can be with the primary control
Device processed leaves the standby mode and leaves the standby mode.
22. operating method as claimed in claim 16, it is characterised in that：When the output voltage is between the first reference electricity
Between pressure and second reference voltage and when the frequency is greater than second preset frequency, the standby signal generation circuit
One is generated after its generated open signal leaves signal to the Docket No and the Docket No accordingly
The standby mode is left, wherein the secondary controller can leave as the Docket No leaves the standby mode
The standby mode.
23. operating method as claimed in claim 13, it is characterised in that：When the detector detect first signal with
When the second signal, the secondary controller generates one after its generated open signal and leaves signal to the primary
A pair of of induction signal that controller and the Docket No leave signal according to correspondence leaves the standby mode,
Described in secondary controller can leave the standby mode as the Docket No leaves the standby mode.
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