CN101873001B - Power supply management control device with reset latch protection function - Google Patents
Power supply management control device with reset latch protection function Download PDFInfo
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- CN101873001B CN101873001B CN 200910134599 CN200910134599A CN101873001B CN 101873001 B CN101873001 B CN 101873001B CN 200910134599 CN200910134599 CN 200910134599 CN 200910134599 A CN200910134599 A CN 200910134599A CN 101873001 B CN101873001 B CN 101873001B
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Abstract
The invention relates to a power supply management control device with reset latch protection function having the characteristics of remote control function, multiple protection function and PWM built-in. The control device can turn off a latch converter when error conditions such as over-voltage, under-voltage or over-power occur. However, under-voltage and over-power protection also occur when the input voltage Vin is decreased since AC interruption or input voltage is removed. Therefore, the invention also provides a device for resetting latch protection by sensing the input voltage Vin and the output voltage Vo.
Description
Technical field
Main purpose of the present invention is providing a kind of device for managing and controlling electrical source of novelty, espespecially a kind of device for managing and controlling electrical source with reset latch protection function.
Background technology
The power supply unit that general personal computer or other electronic equipment are used in order to save the purpose of the energy and power consumption, is provided with device for managing and controlling electrical source more.General power supply unit has two transducers (converter), a transducer is used for main power source (main power), another transducer then is used for less stand-by power supply (standby power), and wherein device for managing and controlling electrical source is to be powered by stand-by power supply.When personal computer or other electronic equipment during in operation, its power supply unit provides main power source; And when system is in holding state, the main power source of its power supply unit will be closed, and stand-by power supply only is provided, the use of supply device for managing and controlling electrical source.
General power supply unit also possesses more the protective circuit device, so that power supply unit can provide the function of protection when erroneous condition such as overvoltage (Over-Voltage), overcurrent (Over-current), low-voltage (Under-voltage) or overpower (Over-Power) occurs.The kenel of protective circuit roughly can be distinguished into two kinds of breech lock (Latch) type and non-latch-types; the latch-type protective circuit refers to when erroneous condition occurs; protective circuit is with breech lock and powered-down; and after the erroneous condition releasing; power supply can't automatically reply; after must restarting power supply, power supply just can be replied.But not the latch-type protective circuit then refers to when erroneous condition occurs, the function of protective circuit starting protection and temporarily stop the power supply supply, in case erroneous condition is removed, power supply namely automatically replies supply.
Though the protective circuit by latch-type can provide the assembly in the power supply unit to protect more reliably; only the latch-type protective circuit is after the defencive function start; protective circuit is with breech lock and close output; the supply of power supply also can't automatically reply after erroneous condition is removed; must restart step through extra power supply, power supply could be replied.In addition; for example produce for personal computer have the power supply unit of latch-type protective circuit the time; test each defencive function whether during normal operation, need again its power supply of switch and cause expending on the production time, these all are the shortcomings of latch-type protective circuit.
Because the above-mentioned shortcoming of latch-type protective circuit, known technology has the additional extra time delay circuit of proposition to solve this shortcoming.This known technology is by being removed when occuring because exchange interrupting (AC interruption) or input voltage source when the protective circuit breech lock; the breech lock action utilize this time delay circuit to delay the off-mode control signal, so that can not occur under this situation.Therefore yet this known technology still has the shortcoming that need expend extra time of delay, needs a kind of proposition of simpler and economic power supply protection circuit arrangement.
Summary of the invention
Main purpose of the present invention is providing a kind of device for managing and controlling electrical source of novelty, particularly, provides a kind of device for managing and controlling electrical source with reset latch protection function.
A kind of device for managing and controlling electrical source with reset latch protection function of the present invention comprises:
One reset cell is used for detecting input voltage and output voltage to produce the reset latch protection of power supply of a reset signal;
A plurality of erroneous condition protected locations are used for protection control signal corresponding to output when erroneous condition occurs;
One logical circuit receives the signal of this reset cell and a plurality of erroneous condition protected locations and produces control signal output, in order to control the breech lock of power supply; Wherein when the situation of making a mistake and input voltage were not lower than a predetermined threshold value, this logical circuit came this power supply unit of breech lock by this control signal of breech lock at dissengaged positions; And when the situation of making a mistake and input voltage are lower than a predetermined threshold value, can the reset latch protection of this power supply of this logical circuit.
The device for managing and controlling electrical source that the present invention has a reset latch protection function has the features such as remote control control function, multiple protection functions and pulse width modulation (PWM) be built-in.This device for managing and controlling electrical source can when erroneous condition such as overvoltage (Over-Voltage), low-voltage (Under-voltage) or overpower (Over-Power) occurs, be closed and breech lock transducer (converter).Yet low-voltage and overpower protection are removed when descending and also can occur because exchange interrupting (AC interruption) or input voltage source in input voltage vin.Therefore the present invention more provides a kind of by the reset device of latch protection of detecting input voltage vin and output voltage V o.
Device for managing and controlling electrical source of the present invention comprises mains switch ON/OFF, low-voltage (Under-voltage) protection UVP, overvoltage (Over-Voltage) protection OVP, overpower (Over-Power) protection OPP, input voltage vin, output voltage V o, electric power starting resetting (Power-on Reset) POR, reset signal reset and enable signal EN equisignal line; And reset apparatus, flip-flop, a plurality of gate, transducer (converter), pulse width modulation (PWM) controller etc.Wherein, when the erroneous condition such as generation overvoltage (Over-Voltage), low-voltage (Under-voltage) or overpower (Over-Power); can start under-voltage protection UVP, overvoltage protection OVP or overpower protection OPP; via the start of flip-flop, gate, EN signal and pulse width modulation controller, close and the breech lock transducer.And situation about being removed because exchange interrupting (AC interruption) or input voltage source in input voltage vin; Vin can be reduced to a rated value; the Vo output voltage also can descend; the protection of UVP starts, and the PWM controller is cut out by breech lock, after Vo is reduced to rated value; " reset " signal enabling; after a bit of time, can enter reopening machine (Restart) state, namely via the start of flip-flop, gate, EN signal and pulse width modulation controller, reopen power supply.
The reset apparatus of device for managing and controlling electrical source of the present invention comprises low-voltage (Under-voltage) protection UVP/ overpower (Over-Power) protection OPP, enable signal EN, input voltage vin, output voltage V o, low input UVin, reset signal reset equisignal line; And two comparators, flip-flop and a plurality of gate.Wherein, if UVP (or OPP) guard mode occurs, and Vin is not in deficiency definite value situation, and " reset " signal can not produce.And if Vin is at deficiency definite value state; the UVin signal can be activated; when UVP (or OPP) guard mode occurs; the PWM controller can cut out by breech lock, and Vo output voltage meeting continuous decrease, and is reduced to rated value when a comparator detects Vo; can start " reset " signal; can enter reopening machine (Restart) state after a bit of time, with replacement latch protection and reopening PWM controller, reopen power supply.
Description of drawings
For further understanding the above-mentioned purpose of the present invention, function, characteristics and advantage, hereinafter will cooperate accompanying drawing to further specify preferred embodiment of the present invention, wherein:
Fig. 1 shows the calcspar of device for managing and controlling electrical source of the present invention.
Fig. 2 shows the internal circuit calcspar of reset apparatus 10 of the present invention.
Fig. 3 shows the sequential chart of function of reset of the present invention.
Embodiment
Figure l shows the calcspar of device for managing and controlling electrical source of the present invention, and this device for managing and controlling electrical source comprises ON/OFF signal, low-voltage (Under-voltage) protection UVP, overvoltage (Over-Voltage) protection OVP, overpower (Over-Power) protection OPP, input voltage vin, output voltage V o, electric power starting resetting (Power-on Reset) POR, reset signal reset, enable signal EN equisignal line; And reset apparatus 10, flip-flop 11, gate 12,13,14,15 and transducer (converter) 16, pulse width modulation (PWM) controller 17.
Reset apparatus 10 is by the reset device of latch protection of detecting input voltage vin and output voltage V o.Reset apparatus 10 receives the signals such as UVP, OPP, Vin and Vo, produces a reset signal " reset " and exports to gate 14.This gate 14 can be one or the door, it receives the reset signal " reset " of reset apparatus output and por signal and produces a control signal 183 and export to flip-flop 11, flip-flop 11 can change its output signal 181 by the effect of this signal 183, and then change enable signal EN via gate 15, reach the purpose of control impuls width modulation controller 17 switches.Gate 12 can be a not gate, and it receives ON/OFF signal and produces a control signal 184 and export to flip-flop 11, and flip-flop 11 also can change its output signal 181 by the acting in conjunction of this signal 184, and then changes enable signal EN via gate 15.
Wherein, when the erroneous condition such as generation overvoltage (Over-Voltage), low-voltage (Under-voltage) or overpower (Over-Power); can start under-voltage protection UVP, overvoltage protection OVP or overpower protection OPP; via the start of flip-flop 11, gate 15, EN signal and pulse width modulation controller 17, close and breech lock transducer 16.And situation about being removed because exchange interrupting (AC interruption) or input voltage source in input voltage vin; Vin can be reduced to a rated value; the Vo output voltage also can descend, and the protection of UVP starts, and can close pulse width modulation controller 17 via EN signal breech lock first this moment.Afterwards, after Vo was reduced to a rated value, " reset " signal enabling can enter reopening machine (Restart) state after a bit of time, can via the start of flip-flop 11, gate 15, EN signal and pulse width modulation controller 17, reopen power supply this moment.
Fig. 2 shows the internal circuit calcspar of reset apparatus 10 of the present invention, and this reset apparatus 10 comprises low-voltage (Under-voltage) protection UVP/ overpower (Over-Power) protection OPP, enable signal EN, input voltage vin, output voltage V o, low input UVin, reset signal reset equisignal line; And comparator 21,22, flip-flop 23, gate 24,25.Wherein, gate 24 can be one with door, the output signal U Vin that it receives UVP/OPP signal and comparator 21 exports to flip-flop 23 and produce a control signal 261.This flip-flop 23 can be a S-R flip-flop, this output signal 261 of its receive logic door 24 and export a control signal 262 to gate 25, and signal 262 and the output signal 263 of comparator 22 become the input of gate 25 jointly.This gate 25 can be one with door, the output signal 263 that receives this output signal 262 of flip-flop 23 and comparator 22 is to produce a reset signal reset this latch protection unbalanced pulse width modulation controller 17 of laying equal stress on of resetting.The end of oppisite phase (-) of Vin access comparator 21, Vo then accesses the negative end of oppisite phase (-) of comparator 22, and two comparators 21,22 non-oppisite phase end (+) then connect a reference voltage Vref altogether.
Among Fig. 2, whether comparator 21 is used for detecting Vin at the undertension state, that is whether the detecting input voltage is lower than a predetermined threshold value.If UVP (or OPP) state occurs, and Vin is not in deficiency definite value situation, can produce fault-signal output overpower or short-circuit signal.This moment, powered-down and latch protection state were quite rational.And if Vin is at deficiency definite value state, then the UV state occurs, and this representative there is no any fault at output and occurs, and then latch protection must be reset when Vin answers together.Whether another comparator 22 detecting Vo at quite low state, if words then " reset " signal can be passed to reset this latch protection also, open the PWM controller.Transducer still can a bit of time of continuous firing when exchanging interruption.
Wherein, if UVP (or OPP) guard mode occurs, and Vin is not in deficiency definite value situation, and " reset " signal can not produce (being in electronegative potential).And if Vin is at deficiency definite value state; the UVin signal can rise to high potential; when UVP (or OPP) guard mode occurs; the PWM controller can cut out by breech lock; and Vo output voltage meeting continuous decrease; and be reduced to rated value when comparator 22 detects Vo, and can start " reset " signal (rising to high potential), can enter reopening machine (Restart) state after a bit of time.Be that the UVP signal rises to high potential, can affect the output of flip-flop 23, and and then change the EN signal and start latch protection.And after Vin is reduced to a rated value; if there is no any fault, output occurs; then Vo can slowly descend; whether comparator 22 can detect Vo at quite low state; if words then " reset " signal can rise to high potential and be passed to reset this latch protection and reopening PWM controller, reopen power supply.
Fig. 3 shows the sequential chart of function of reset of the present invention, and each signal condition that from top to bottom shows is sequentially input voltage vin, low input signal UVin, under-voltage protection UVP, enable signal EN, reset signal reset and output voltage V o.Wherein, when sequential 1; power supply normal signal PG (power good) is down to electronegative potential; the load power source of system is removed, and this moment, Vin was reduced to a rated value, and the UVin signal rises to high potential; the protection of UVP not yet starts (still being in electronegative potential); EN is in high potential, and " reset " signal not yet starts (still being in electronegative potential), and Vo is in high potential.
Then, when sequential 2, output voltage begins vagus escape control and descends; this moment, Vin continued to reduce, and UVin is in high potential, and the protection of UVP does not start (being in electronegative potential) yet; EN still is in high potential, and " reset " signal does not start (being in electronegative potential) yet, and Vo begins to descend.
Then when sequential 3; the protection of UVP starts; and the PWM controller can be closed; this moment, Vin continued to reduce, and UVin is in high potential, and the protection startup of UVP (rises to high potential; only rising to high potential can get back to electronegative potential after a bit of time); EN is down to electronegative potential from high potential, and " reset " signal does not start (being in electronegative potential) yet, and Vo continues fast-descending.
At last, when sequential 4, comparator U2 detects Vo and is reduced to rated value, start " reset " signal (rising to high potential), can postpone a bit of time because of the reaction of " reset " signal enabling this moment, so Vin still continues to reduce, can enter reopening machine (Restart) state behind the only short time, UVin is in high potential, UVP is in electronegative potential, and EN rises to high potential from electronegative potential, " reset " signal enabling (rising to high potential from electronegative potential), and Vo still continues fast-descending, can enter reopening machine (Restart) state behind the only short time.
For more being described in more detail the operating process of the function of reset sequential that Fig. 3 shows, the time sequence status of comprehensive improvement sequential 1 to 4 is after being illustrated in.At first, when Vin was reduced to a rated value, the UVin signal can rise to high potential, if then the UV state occurs, started the protection of UVP, and this moment, the PWM controller can be closed.And after Vin is reduced to a rated value; if there is no any fault, output occurs; then Vo can slowly descend; whether comparator U2 can detect Vo at quite low state; if words then " reset " signal can rise to high potential and be passed to reset this latch protection and reopening PWM controller, reopen power supply.
In sum, device for managing and controlling electrical source of the present invention has the features such as remote control control function, multiple protection functions and PWM be built-in.For example overvoltage (Over-Voltage) can occur in this control device; low-voltage (Under-voltage); or during the erroneous condition such as overpower (Over-Power); close and breech lock transducer (converter); and device for managing and controlling electrical source of the present invention betides input voltage vin at low-voltage and overpower protection and interrupts (AC interruption) or input voltage source and be removed when descending because exchanging; provide a kind of by the reset device of latch protection of detecting input voltage vin and output voltage V o, therefore the device that is used for the replacement latch protection in a kind of simple power supply unit is provided.
Although the present invention has utilized above-mentioned preferred embodiment to disclose in detail; so it is not to limit the present invention; allly have the knack of this technology personage; without departing from the spirit and scope of the present invention; can carry out various changes and modification, so protection scope of the present invention is worked as with being as the criterion that the claim scope is defined.
Claims (6)
1. device for managing and controlling electrical source with reset latch protection function comprises:
One reset cell is used for detecting input voltage and output voltage to produce the reset latch protection of power supply of a reset signal;
A plurality of erroneous condition protected locations are used for protection control signal corresponding to output when erroneous condition occurs;
One logical circuit receives the signal of this reset cell and a plurality of erroneous condition protected locations and produces control signal output, in order to control the breech lock of power supply; Wherein when the situation of making a mistake and input voltage were not lower than one first predetermined threshold value, this logical circuit came this power supply unit of breech lock by this control signal of breech lock at dissengaged positions; And when the situation of making a mistake and input voltage were lower than one second predetermined threshold value, this logical circuit can start the latch protection of reset signal and then this power supply of resetting, and wherein this first predetermined threshold value is greater than this second predetermined threshold value.
2. the device for managing and controlling electrical source with reset latch protection function as claimed in claim 1, wherein these a plurality of erroneous condition protected locations comprise one of following at least: a under-voltage protection unit UVP, an overvoltage protective unit OVP, an overpower protection unit OPP.
3. the device for managing and controlling electrical source with reset latch protection function as claimed in claim 1, wherein this reset cell comprises:
One first comparator is used for detecting input voltage, and compares with a reference voltage, to export one first comparison signal;
One second comparator is used for detecting output voltage, and compares with a reference voltage, to export one second comparison signal;
One logical circuit is used for producing a reset signal according to control signal, the first comparison signal and second comparison signal of erroneous condition protected location.
4. the device for managing and controlling electrical source with reset latch protection function as claimed in claim 3, wherein this logical circuit comprises:
One first gate, it receives protection control signal and first comparison signal of the output of erroneous condition protected location, and produces one first output signal;
One flip-flop, it receives this first output signal and produces one second output signal;
One second gate, it receives this second output signal and the second comparison signal, and produces a reset signal.
5. the device for managing and controlling electrical source with reset latch protection function as claimed in claim 4, wherein the protection control signal of this erroneous condition protected location output that receives is a under-voltage protection unit UVP signal or an overpower protection unit OPP signal.
6. the device for managing and controlling electrical source with reset latch protection function as claimed in claim 1, wherein this logical circuit comprises:
One the 3rd gate, it receives a machine open/close signal and produces one the 3rd output signal;
One the 4th gate, it receives the protection control signal of this erroneous condition protected location output and produces one the 4th output signal;
One the 5th gate, it receives this reset signal of this reset cell and produces one the 5th output signal;
One flip-flop, it receives the 3rd output signal, the 4th output signal, the 5th output signal and produces one the 7th output signal;
One the 6th gate, it receives the 7th output signal and the machine open/close signal of this flip-flop, and produces a control signal, in order to control the breech lock of power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910134599 CN101873001B (en) | 2009-04-23 | 2009-04-23 | Power supply management control device with reset latch protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910134599 CN101873001B (en) | 2009-04-23 | 2009-04-23 | Power supply management control device with reset latch protection function |
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| Publication Number | Publication Date |
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| CN101873001A CN101873001A (en) | 2010-10-27 |
| CN101873001B true CN101873001B (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910134599 Expired - Fee Related CN101873001B (en) | 2009-04-23 | 2009-04-23 | Power supply management control device with reset latch protection function |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI461893B (en) * | 2011-11-04 | 2014-11-21 | Wistron Corp | Processing system and power controlling devices thereof |
| CN102891591B (en) * | 2012-10-15 | 2014-10-22 | 杭州士兰微电子股份有限公司 | Power control device and switch power supply containing power control device |
| CN106645892B (en) * | 2016-09-09 | 2020-01-14 | Oppo广东移动通信有限公司 | Overvoltage detection circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1255771A (en) * | 1998-11-19 | 2000-06-07 | 横河电机株式会社 | Switch power source |
| CN2497482Y (en) * | 2001-01-21 | 2002-06-26 | 顺德市力威电器实业有限公司 | Pulse width-adjusting D.C. to A.C. high-efficient inverter |
| CN1357953A (en) * | 2000-12-05 | 2002-07-10 | 神达电脑股份有限公司 | Protector to abnormal input voltage |
| CN1925297A (en) * | 2005-08-29 | 2007-03-07 | 三星电子株式会社 | Power supplying apparatus and power supplying method |
-
2009
- 2009-04-23 CN CN 200910134599 patent/CN101873001B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1255771A (en) * | 1998-11-19 | 2000-06-07 | 横河电机株式会社 | Switch power source |
| CN1357953A (en) * | 2000-12-05 | 2002-07-10 | 神达电脑股份有限公司 | Protector to abnormal input voltage |
| CN2497482Y (en) * | 2001-01-21 | 2002-06-26 | 顺德市力威电器实业有限公司 | Pulse width-adjusting D.C. to A.C. high-efficient inverter |
| CN1925297A (en) * | 2005-08-29 | 2007-03-07 | 三星电子株式会社 | Power supplying apparatus and power supplying method |
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| CN101873001A (en) | 2010-10-27 |
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