CN102983553A - Method and device for overload protection of switching power supply - Google Patents
Method and device for overload protection of switching power supply Download PDFInfo
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- CN102983553A CN102983553A CN2012104702235A CN201210470223A CN102983553A CN 102983553 A CN102983553 A CN 102983553A CN 2012104702235 A CN2012104702235 A CN 2012104702235A CN 201210470223 A CN201210470223 A CN 201210470223A CN 102983553 A CN102983553 A CN 102983553A
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Abstract
The invention discloses a method and a device for overload protection of a switching power supply. The method for overload protection of the switching power supply comprises the steps of obtaining a current error feedback voltage value of the switching power supply; judging whether the current error feedback voltage value is larger than a first error feedback voltage value at the maximum peak power of the switching power supply or not; returning and executing the step of obtaining of the current error feedback voltage value of the switching power supply when the current error feedback voltage value is smaller than a second error feedback voltage value at the maximum average power of the switching power supply in a first preset time period if the current error feedback voltage value is larger than the first error feedback voltage value at the maximum peak power of the switching power supply; controlling the switching power supply to stop working if the current error feedback voltage value is larger than or equal to the second error feedback voltage value at the maximum average power of the switching power supply; and returning and executing the step of obtaining of the current error feedback voltage value of the switching power supply if the current error feedback voltage value is not larger than the first error feedback voltage value at the maximum peak power of the switching power supply. By the aid of the method and the device, the cost of an overload protection circuit of a resistive load with the large variation is reduced, the cost of the switching power supply is reduced, and the method and the device are applicable to industrial production.
Description
Technical field
The present invention relates to the switch power technology field, particularly a kind of Switching Power Supply overload protection method and device.
Background technology
The Switching Power Supply high frequency is the direction of its development, and high frequency makes the Switching Power Supply miniaturization, and makes Switching Power Supply enter widely application, particularly in the application of high-technology field, has promoted miniaturization, the lighting of new high-tech product.In addition the development of Switching Power Supply be applied in energy savings, economize on resources and the protection of the environment aspect all has great importance.Switching Power Supply is when output overloading and short circuit; for protection power source and load are not damaged; usually the method for the peak current of limit switch pipe limits the maximum power of output; but when load is when changing larger resistive load; then need the power device of selecting power larger, therefore increased the cost of power device.
Summary of the invention
Main purpose of the present invention is to provide a kind of Switching Power Supply overload protection method, is intended to reduce the cost of the overload protecting circuit of the larger resistive load of change.
In order to realize goal of the invention, the invention provides a kind of Switching Power Supply overload protection arrangement, described Switching Power Supply overload protection arrangement comprises acquisition module, judge module and control module; Wherein,
Acquisition module is for the error current feedback voltage value of obtaining Switching Power Supply;
Judge module is used for judging whether the first Error Feedback magnitude of voltage during greater than the maximum peak power of described Switching Power Supply of error current feedback voltage value; If then within through the first preset time period, during the second Error Feedback magnitude of voltage of error current feedback voltage value during less than the maximum average power of described Switching Power Supply, return by acquisition module and carry out the described error current feedback voltage Value Operations that obtains Switching Power Supply; If the second Error Feedback magnitude of voltage of error current feedback voltage value during all more than or equal to the maximum average power of described Switching Power Supply, then quit work by control module control switch power supply, otherwise carry out the described error current feedback voltage Value Operations that obtains Switching Power Supply by acquisition module.
Preferably, described judge module also is used for, and judges whether the 3rd Error Feedback magnitude of voltage during greater than the greatest limit power of described Switching Power Supply of error current feedback voltage value; If then carry out the operation that quits work of described control switch power supply by described control module; Otherwise continue to judge whether the first Error Feedback magnitude of voltage during greater than the maximum peak power of described Switching Power Supply of error current feedback voltage value.
Preferably, described judge module comprises the first comparator, the second comparator and the 3rd comparator, and the error current feedback signal of described Switching Power Supply is connected to respectively the in-phase input end of the first comparator, the reverse input end of the second comparator and the in the same way input of the 3rd comparator; The reverse input end of the first comparator connects the level signal that a magnitude of voltage equals the first Error Feedback magnitude of voltage, the in the same way input of the second comparator connects the level signal that a magnitude of voltage equals the second Error Feedback magnitude of voltage, and the reverse input end of the 3rd comparator connects the level signal that a magnitude of voltage equals the 3rd Error Feedback magnitude of voltage.
Preferably, described control module comprises the first rest-set flip-flop, timer or logical circuit and the second rest-set flip-flop, wherein the set end of the first rest-set flip-flop is connected with the output of the first comparator, and the reset terminal of the second rest-set flip-flop is connected with the input of the second comparator; The start end of timer is connected with the positive output end of the first rest-set flip-flop, and reset terminal is connected with the negative output terminal of the first rest-set flip-flop; Or the first input end of logical circuit is connected with the output of timer, and the second input is connected with the output of the 3rd comparator, and output is connected with the set end of the second rest-set flip-flop; The positive output end of described the second rest-set flip-flop is connected with the BIAS of Switching Power Supply end.
Preferably, the reset terminal of described the second rest-set flip-flop is connected with the under-voltage locking end of Switching Power Supply.
The present invention also provides a kind of Switching Power Supply overload protection method, and this Switching Power Supply overload protection method may further comprise the steps:
Obtain the error current feedback voltage value of Switching Power Supply;
Judge whether the first Error Feedback magnitude of voltage during greater than the maximum peak power of described Switching Power Supply of error current feedback voltage value;
If then within through the first preset time period, during the second Error Feedback magnitude of voltage of error current feedback voltage value during less than the maximum average power of described Switching Power Supply, return and carry out the described error current feedback voltage value step of obtaining Switching Power Supply; If the second Error Feedback magnitude of voltage of error current feedback voltage value during all more than or equal to the maximum average power of described Switching Power Supply, then the control switch power supply quits work;
If not, then return the described step of obtaining the error current feedback voltage value of Switching Power Supply of execution.
Preferably, describedly judge that whether error current feedback voltage value also comprises before the first Error Feedback magnitude of voltage step during greater than the maximum peak power of described Switching Power Supply carrying out:
Judge whether the 3rd Error Feedback magnitude of voltage during greater than the greatest limit power of described Switching Power Supply of error current feedback voltage value;
If then the control switch power supply quits work;
If not, then carry out described whether the first Error Feedback magnitude of voltage step during greater than the maximum peak power of described Switching Power Supply of error current feedback voltage value of judging.
The present invention is by obtaining the error current feedback voltage value of Switching Power Supply; simultaneously will this current Error Feedback magnitude of voltage and the first Error Feedback magnitude of voltage the during maximum peak power of Switching Power Supply compare; until error current feedback voltage value is during greater than the first Error Feedback magnitude of voltage; the control switch power supply quits work, thereby realizes the overload protection to Switching Power Supply.Because the present invention realizes overload protection by relative error feedback voltage value to load; be not only applicable to change larger resistive load; need not simultaneously to increase the cost of power device; change the cost of the overload protecting circuit of larger resistive load thereby reduced, and then reduced the cost of Switching Power Supply.
Description of drawings
Fig. 1 is the schematic flow sheet of Switching Power Supply overload protection method one embodiment of the present invention;
Fig. 2 is the schematic flow sheet of another embodiment of Switching Power Supply overload protection method of the present invention;
Fig. 3 is the structural representation of Switching Power Supply overload protection arrangement one embodiment of the present invention;
Fig. 4 is the electrical block diagram of Switching Power Supply overload protection arrangement one embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 1, Fig. 1 is the schematic flow sheet of Switching Power Supply overload protection method one embodiment of the present invention.The Switching Power Supply overload protection method that present embodiment provides may further comprise the steps:
Step S10 obtains the error current feedback voltage value of Switching Power Supply;
In the present embodiment, be provided with error feedback signal in the Switching Power Supply, by obtaining this error feedback signal, thereby obtain error current feedback voltage value.
Step S20 judges whether the first Error Feedback magnitude of voltage during greater than the maximum peak power of Switching Power Supply of error current feedback voltage value; If execution in step S30 then, if not execution in step S10 then.
Step S30 within through the first preset time period, during the second Error Feedback magnitude of voltage of error current feedback voltage value during less than the maximum average power of described Switching Power Supply, returns and carries out the described error current feedback voltage value step of obtaining Switching Power Supply; If the second Error Feedback magnitude of voltage of error current feedback voltage value during all more than or equal to the maximum average power of described Switching Power Supply, then the control switch power supply quits work.
After getting access to error current feedback voltage value, should current Error Feedback magnitude of voltage and the first Error Feedback magnitude of voltage compare the Error Feedback magnitude of voltage that this first Error Feedback magnitude of voltage produces when being the Switching Power Supply maximum peak power.And until error current feedback voltage value is during greater than the first Error Feedback magnitude of voltage, when error current feedback voltage value during greater than the first Error Feedback magnitude of voltage, judgement is within through the first preset time period, and whether error current feedback voltage value is less than the second Error Feedback magnitude of voltage; If less than the second Error Feedback magnitude of voltage, then judge Switching Power Supply for transshipping once in a while, do not need the work of shutdown switch power supply this moment, whether continues to obtain error current feedback voltage value less than the first Error Feedback magnitude of voltage thereby return; If within this first preset time period, error current feedback voltage value is in the state more than or equal to the second Error Feedback magnitude of voltage always, and then the control switch power supply quits work.Therefore, the present invention can prevent effectively that Switching Power Supply from causing misoperation because circuit is unstable.
The present invention is by obtaining the error current feedback voltage value of Switching Power Supply; simultaneously will this current Error Feedback magnitude of voltage and the first Error Feedback magnitude of voltage the during maximum peak power of Switching Power Supply compare; until error current feedback voltage value is during greater than the first Error Feedback magnitude of voltage; the control switch power supply quits work, thereby realizes the overload protection to Switching Power Supply.Because the present invention realizes overload protection by relative error feedback voltage value to load; be not only applicable to change larger resistive load; need not simultaneously to increase the cost of power device; change the cost of the overload protecting circuit of larger resistive load thereby reduced, and then reduced the cost of Switching Power Supply.
Further, with reference to Fig. 2, Fig. 2 is the schematic flow sheet of another embodiment of Switching Power Supply overload protection method of the present invention.Based on above-described embodiment, in the present embodiment, before carrying out above-mentioned steps S20, also comprise:
Step S40 judges whether the 3rd Error Feedback magnitude of voltage during greater than the greatest limit power of Switching Power Supply of error current feedback voltage value; If, execution in step S50 then; Otherwise execution in step S20.
Step S50, control switch power supply quit work.
In this embodiment; when the three Error Feedback magnitude of voltage of error current feedback voltage value during greater than the maximum power of Switching Power Supply; then the control switch power supply quits work; damage Switching Power Supply to prevent Switching Power Supply overload, so the further protective efficient switch power supply of the Switching Power Supply overload protection method that provides of present embodiment.
The present invention also provides a kind of Switching Power Supply overload protection arrangement, is used for realizing said method.With reference to Fig. 3, Fig. 3 is the structural representation of Switching Power Supply overload protection arrangement one embodiment of the present invention.The Switching Power Supply overload protection unit that present embodiment provides comprises acquisition module 100, judge module 200 and control module 300; Wherein,
In the present embodiment, be provided with error feedback signal in the Switching Power Supply, by obtaining this error feedback signal, thereby obtain error current feedback voltage value.
After acquisition module 100 gets access to error current feedback voltage value, should export judge module 200 to by current Error Feedback magnitude of voltage, error current feedback voltage value and the first Error Feedback magnitude of voltage are compared the Error Feedback magnitude of voltage that this first Error Feedback magnitude of voltage produces when being the Switching Power Supply maximum peak power by judge module 200.And until error current feedback voltage value during greater than the first Error Feedback magnitude of voltage, judges that whether error current feedback voltage value is less than the second Error Feedback magnitude of voltage within through the first preset time period; If front Error Feedback magnitude of voltage is less than the second Error Feedback magnitude of voltage, judge that then Switching Power Supply is for transshipping once in a while, do not need the work of shutdown switch power supply this moment, continues whether to obtain error current feedback voltage value less than the first Error Feedback magnitude of voltage by acquisition module 100 thereby return; If within this first preset time period, error current feedback voltage value is in the state more than or equal to the second Error Feedback magnitude of voltage always, is then quit work by control module 300 control switch power supplys.Therefore, the present invention can prevent effectively that Switching Power Supply from causing misoperation because circuit is unstable.
The present invention obtains the error current feedback voltage value of Switching Power Supply by acquisition module 100; simultaneously will this current Error Feedback magnitude of voltage by judge module 200 and the first Error Feedback magnitude of voltage the during maximum peak power of Switching Power Supply compare; until error current feedback voltage value is during greater than the first Error Feedback magnitude of voltage; quit work by control module 300 control switch power supplys, thereby realization is to the overload protection of Switching Power Supply.Because the present invention realizes overload protection by relative error feedback voltage value to load; be not only applicable to change larger resistive load; need not simultaneously to increase the cost of power device; change the cost of the overload protecting circuit of larger resistive load thereby reduced, and then reduced the cost of Switching Power Supply.
Further, above-mentioned judge module 200 also is used for, judge when error current feedback voltage value during greater than the first Error Feedback magnitude of voltage, and that within through the first preset time period error current feedback voltage value is the second Error Feedback magnitude of voltage during less than the maximum average power of Switching Power Supply whether; If then carry out the error current feedback voltage Value Operations that obtains Switching Power Supply by acquisition module 100; Otherwise carry out the operation that quits work of control switch power supplys by control module 200.
Further, above-mentioned judge module 200 also is used for, and judges whether the 3rd Error Feedback magnitude of voltage during greater than the greatest limit power of Switching Power Supply of error current feedback voltage value; If then carry out the operation that quits work of control switch power supplys by control module 300; Otherwise continue to judge whether the first Error Feedback magnitude of voltage during greater than the maximum peak power of Switching Power Supply of error current feedback voltage value.
In this embodiment; when the three Error Feedback magnitude of voltage of error current feedback voltage value during greater than the maximum power of Switching Power Supply; then quit work by control module 300 control switch power supplys; damage Switching Power Supply to prevent Switching Power Supply overload, so the further protective efficient switch power supply of the Switching Power Supply overload protection arrangement that provides of present embodiment.
In conjunction with reference to Fig. 4, Fig. 4 is the electrical block diagram of Switching Power Supply overload protection arrangement one embodiment of the present invention.In the present embodiment, above-mentioned judge module 200 can comprise the first comparator U1, the second comparator U2 and the 3rd comparator U3.The error feedback signal of Switching Power Supply is connected to respectively the in-phase input end of the first comparator U1, the reverse input end of the second comparator U2 and the in the same way input of the 3rd comparator U3; The reverse input end of the first comparator U1 connects the level signal V1 that a magnitude of voltage equals the first Error Feedback magnitude of voltage, the in the same way input of the second comparator U2 connects the level signal V2 that a magnitude of voltage equals the second Error Feedback magnitude of voltage, and the reverse input end of the 3rd comparator U3 connects the level signal V3 that a magnitude of voltage equals the 3rd Error Feedback magnitude of voltage.
Above-mentioned control module 300 comprises the first rest-set flip-flop U4, timer U5 or logical circuit U6 and the second rest-set flip-flop U7, wherein the set end of the first rest-set flip-flop U4 is connected with the output of the first comparator U1, and the reset terminal of the second rest-set flip-flop is connected with the input of the second comparator U2; The start end of timer U5 is connected with the positive output end of the first rest-set flip-flop U4, and reset terminal is connected with the negative output terminal of the first rest-set flip-flop U4; Or the first input end of logical circuit U6 is connected with the output of timer U5, and the second input is connected with the output of the 3rd comparator U3, and output is connected with the set end of the second rest-set flip-flop U7; The UVLO(Under Voltage Lock Out of the reset terminal of the second rest-set flip-flop and Switching Power Supply, under-voltage locking) the end connection, positive output end is connected with the BIAS end of Switching Power Supply.
When error current feedback voltage value during greater than the 3rd error voltage value, the 3rd comparator U3 will export a high level extremely or the second input of logical circuit U6, so that or logical circuit U6 export the reset terminal of high level to the second a rest-set flip-flop U7, this moment, the positive output end of the second rest-set flip-flop U7 was exported a low level to the BIAS end of Switching Power Supply, and then the control switch power supply quits work.
When error current feedback voltage value greater than the first error voltage value, and during less than the 3rd error voltage value, the set end of the first comparator U1 output high level to the first rest-set flip-flop U4, thereby so that the positive output end of the first rest-set flip-flop U4 is exported a high level to the start end of timer U5, timer U5 begins timing, after timer arrives above-mentioned the first preset time period, export a high level to or the first input end of logical circuit U6, so that or logical circuit U6 export the reset terminal of high level to the second a rest-set flip-flop U7, this moment, the positive output end of the second rest-set flip-flop U7 was exported a low level to the BIAS end of Switching Power Supply, and then the control switch power supply quits work.
U5 begins timing at timer, and when not reaching for the first preset time period, if error current feedback voltage value during less than the second error voltage value, the first comparator U1 output low level then, the second comparator U2 exports high level; Thereby so that the positive output end output low level of the first rest-set flip-flop U4, negative output terminal is exported high level, and then timer U5 is resetted, and waits for next time and triggering.
After the BIAS of stopcock power supply, when the UVLO(Under of Switching Power Supply Voltage Lock Out, under-voltage locking) voltage of end is when being high level, thus BIAS is resetted, Switching Power Supply enters normal operating conditions.
The time span that should be noted that above-mentioned the first preset time period can arrange according to actual needs, is not further qualified at this.Be understandable that, adopt rest-set flip-flop in the present embodiment, also can adopt other trigger in other embodiments; The reset terminal of this rest-set flip-flop is the R end, and the set end is the S end, and positive output end is the Q end, and negative output terminal is
End.
Below only be the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (7)
1. a Switching Power Supply overload protection arrangement is characterized in that, described Switching Power Supply overload protection arrangement comprises acquisition module, judge module and control module; Wherein,
Acquisition module is for the error current feedback voltage value of obtaining Switching Power Supply;
Judge module is used for judging whether the first Error Feedback magnitude of voltage during greater than the maximum peak power of described Switching Power Supply of error current feedback voltage value; If then within through the first preset time period, during the second Error Feedback magnitude of voltage of error current feedback voltage value during less than the maximum average power of described Switching Power Supply, return by acquisition module and carry out the described error current feedback voltage Value Operations that obtains Switching Power Supply; If the second Error Feedback magnitude of voltage of error current feedback voltage value during all more than or equal to the maximum average power of described Switching Power Supply, then quit work by control module control switch power supply, otherwise carry out the described error current feedback voltage Value Operations that obtains Switching Power Supply by acquisition module.
2. Switching Power Supply overload protection arrangement as claimed in claim 1 is characterized in that, described judge module also is used for, and judges whether the 3rd Error Feedback magnitude of voltage during greater than the greatest limit power of described Switching Power Supply of error current feedback voltage value; If then quit work by described control module control switch power supply; Otherwise continue to judge whether the first Error Feedback magnitude of voltage during greater than the maximum peak power of described Switching Power Supply of error current feedback voltage value.
3. Switching Power Supply overload protection arrangement as claimed in claim 2, it is characterized in that, described judge module comprises the first comparator, the second comparator and the 3rd comparator, and the error current feedback signal of described Switching Power Supply is connected to respectively the in-phase input end of the first comparator, the reverse input end of the second comparator and the in the same way input of the 3rd comparator; The reverse input end of the first comparator connects the level signal that a magnitude of voltage equals the first Error Feedback magnitude of voltage, the in the same way input of the second comparator connects the level signal that a magnitude of voltage equals the second Error Feedback magnitude of voltage, and the reverse input end of the 3rd comparator connects the level signal that a magnitude of voltage equals the 3rd Error Feedback magnitude of voltage.
4. Switching Power Supply overload protection arrangement as claimed in claim 3, it is characterized in that, described control module comprises the first rest-set flip-flop, timer or logical circuit and the second rest-set flip-flop, wherein the set end of the first rest-set flip-flop is connected with the output of the first comparator, and the reset terminal of the second rest-set flip-flop is connected with the input of the second comparator; The start end of timer is connected with the positive output end of the first rest-set flip-flop, and reset terminal is connected with the negative output terminal of the first rest-set flip-flop; Or the first input end of logical circuit is connected with the output of timer, and the second input is connected with the output of the 3rd comparator, and output is connected with the set end of the second rest-set flip-flop; The positive output end of described the second rest-set flip-flop is connected with the BIAS of Switching Power Supply end.
5. Switching Power Supply overload protection arrangement as claimed in claim 4 is characterized in that, the reset terminal of described the second rest-set flip-flop is connected with the under-voltage locking end of Switching Power Supply.
6. a Switching Power Supply overload protection method is characterized in that, may further comprise the steps:
Obtain the error current feedback voltage value of Switching Power Supply;
Judge whether the first Error Feedback magnitude of voltage during greater than the maximum peak power of described Switching Power Supply of error current feedback voltage value;
If then within through the first preset time period, during the second Error Feedback magnitude of voltage of error current feedback voltage value during less than the maximum average power of described Switching Power Supply, return and carry out the described error current feedback voltage value step of obtaining Switching Power Supply; If the second Error Feedback magnitude of voltage of error current feedback voltage value during all more than or equal to the maximum average power of described Switching Power Supply, then the control switch power supply quits work;
If not, then return the described step of obtaining the error current feedback voltage value of Switching Power Supply of execution.
7. Switching Power Supply overload protection method as claimed in claim 6 is characterized in that, describedly judges that whether error current feedback voltage value also comprises before the first Error Feedback magnitude of voltage step during greater than the maximum peak power of described Switching Power Supply carrying out:
Judge whether the 3rd Error Feedback magnitude of voltage during greater than the greatest limit power of described Switching Power Supply of error current feedback voltage value;
If then the control switch power supply quits work;
If not, then carry out described whether the first Error Feedback magnitude of voltage step during greater than the maximum peak power of described Switching Power Supply of error current feedback voltage value of judging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210470223.5A CN102983553B (en) | 2012-11-19 | 2012-11-19 | Switching Power Supply overload protection method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210470223.5A CN102983553B (en) | 2012-11-19 | 2012-11-19 | Switching Power Supply overload protection method and device |
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| CN102983553A true CN102983553A (en) | 2013-03-20 |
| CN102983553B CN102983553B (en) | 2015-11-18 |
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Citations (5)
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|---|---|---|---|---|
| CN2777817Y (en) * | 2005-01-26 | 2006-05-03 | 杨义根 | Protection circuit for single switch power |
| CN101167240A (en) * | 2004-08-06 | 2008-04-23 | St微电子公司 | Switched-mode power supply regulation |
| US20110122664A1 (en) * | 2009-11-26 | 2011-05-26 | Fuji Electric Systems Co. Ltd. | Power factor correction type switching power supply unit |
| CN102193509A (en) * | 2010-03-01 | 2011-09-21 | 株式会社村田制作所 | Switching control circuit and switching power supply device |
| CN102364858A (en) * | 2011-02-01 | 2012-02-29 | 杭州士兰微电子股份有限公司 | Constant-current switching power supply controller capable of controlling through primary side and method |
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2012
- 2012-11-19 CN CN201210470223.5A patent/CN102983553B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101167240A (en) * | 2004-08-06 | 2008-04-23 | St微电子公司 | Switched-mode power supply regulation |
| CN2777817Y (en) * | 2005-01-26 | 2006-05-03 | 杨义根 | Protection circuit for single switch power |
| US20110122664A1 (en) * | 2009-11-26 | 2011-05-26 | Fuji Electric Systems Co. Ltd. | Power factor correction type switching power supply unit |
| CN102193509A (en) * | 2010-03-01 | 2011-09-21 | 株式会社村田制作所 | Switching control circuit and switching power supply device |
| CN102364858A (en) * | 2011-02-01 | 2012-02-29 | 杭州士兰微电子股份有限公司 | Constant-current switching power supply controller capable of controlling through primary side and method |
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Granted publication date: 20151118 |