CN104219821A - Light-emitting element control circuit and hot-plug sensing circuit therein as well as light-emitting element circuit - Google Patents
Light-emitting element control circuit and hot-plug sensing circuit therein as well as light-emitting element circuit Download PDFInfo
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- CN104219821A CN104219821A CN201310215127.0A CN201310215127A CN104219821A CN 104219821 A CN104219821 A CN 104219821A CN 201310215127 A CN201310215127 A CN 201310215127A CN 104219821 A CN104219821 A CN 104219821A
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Abstract
The invention provides a light-emitting element control circuit, a hot-plug sensing circuit therein and an associated light-emitting element circuit. The light-emitting element control circuit is used to generate a control signal to operate a power level circuit, which converts the input voltage into the output voltage in order to supply an output current to the light-emitting element circuit. The light-emitting element control circuit includes a hot-plug sensing circuit and a signal generation control circuit. The hot-plug sensing circuit is used to generate a hot-plug determination signal in accordance with an output voltage, so that upon removing the light-emitting element circuit in the case that it is coupled to the power level circuit, and upon reassembling the light-emitting element circuit after its removal, the hot-plug determination signal will be adjusted to determine the light-emitting element control circuit to be operated in constant voltage control mode or normal operation mode.
Description
Technical field
The present invention relates to a kind of light-emitting component control circuit and hot plug aware circuit wherein and associated light emitting element circuit, refer to that one has the light-emitting component control circuit of hot plug (hot-swapping) safeguard function and hot plug aware circuit wherein and associated light emitting element circuit especially.
Background technology
Fig. 1 shows a kind of prior art light-emitting diode (light emitting diode, LED) power control circuit 100 schematic diagram.As shown in Figure 1, LED power control circuit 100 is in order to control LED circuit 10.Wherein, LED power control circuit 100 comprise light-emitting component control circuit 110, power stage circuit 120, with feedback circuit 130.Wherein, light-emitting component control circuit 110 is connected with feedback circuit 130, to receive feedback signal FB, and produce control signal GATE, in order to the power switch in operating power level circuit 120, and then input voltage vin is converted to output voltage Vout, and provide output current Iout for should LED circuit 10.Power stage circuit 120 can be synchronous or asynchronous voltage-dropping type, booster type, back-pressure type, buck-boost type or rises back-pressure type power stage circuit, as shown in Fig. 2 A-2J.
Generally speaking; LED power control circuit 100 is when normal running; regulation output electric current I out is in fixing predetermined current; before LED power control circuit 100 not being shut down; namely in normal manipulation mode, suddenly LED circuit 10 is removed, light-emitting component control circuit 110 can be made constantly to operate; attempt output current Iout to regulate in predetermined current, thus cause the power dissipation on circuit operation.Suddenly again afterwards, reinstalled by LED circuit 10, when relatively high output voltage Vout, this measure can produce temporary impact electric current (instant surge current).And temporary impact electric current can cause the damage of element in circuit, reduce the life-span of circuit.In addition, as suddenly LED circuit 10 removed, then protecting without the pressure drop of LED circuit 10 between output and input, as made short circuit between output and input because of human contact, will danger be caused.Therefore, when LED circuit 10 removes, output voltage Vout must control under safety limit.
In view of this, the present invention, namely for above-mentioned the deficiencies in the prior art, proposes a kind of light-emitting component control circuit with hot plug safeguard function and hot plug aware circuit wherein and associated light emitting element circuit.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and defect, propose a kind of light-emitting component control circuit with hot plug safeguard function and hot plug aware circuit wherein and associated light emitting element circuit.
For reaching above-mentioned purpose, say with regard to one of them viewpoint, the invention provides a kind of light-emitting component control circuit with hot plug safeguard function, be used in a normal manipulation mode, produce one and control signal to operate a power stage circuit, and an input voltage is converted to an output voltage, a light-emitting element circuit is given to supply an output current, described light-emitting component control circuit comprises: a hot plug aware circuit, in order to according to this output voltage, produce a hot plug and judge signal, after making to be removed under this light-emitting element circuit is by the situation coupled with this power stage circuit, and after putting in back after this light-emitting element circuit removes, adjust this hot plug and judge signal, to determine that this light-emitting component control circuit operates in certain voltage control model or this normal manipulation mode, this hot plug aware circuit comprises: a sensing circuit, in order to according to this output voltage, and produce a sensing signal, and a decision circuitry, couple with this sensing circuit, in order to according to this sensing signal, and produce this hot plug and judge signal, and one controls signal generating circuit, couple with this power stage circuit and this hot plug aware circuit respectively, in order to judge signal according to this hot plug, adjust this control signal, make, after this light-emitting element circuit is removed in normal manipulation mode, operates in this and determine voltage mode control, and this output voltage is regulated in a predetermined level, and when this light-emitting element circuit is after replying the situation coupled with this power stage circuit, operate in this normal manipulation mode.
For reaching above-mentioned purpose, say with regard to another viewpoint, the invention provides a kind of for the hot plug aware circuit in light-emitting component control circuit, this light-emitting component control circuit is in a normal manipulation mode, produce one and control signal to operate a power stage circuit, and an input voltage is converted to an output voltage, a light-emitting element circuit is given to supply an output current, wherein this hot plug aware circuit, in order to according to this output voltage, produce a hot plug and judge signal, after making to be removed under this light-emitting element circuit is by the situation coupled with this power stage circuit, and after putting in back after this light-emitting element circuit removes, adjust this hot plug and judge signal, to determine that this light-emitting component control circuit operates in certain voltage control model or this normal manipulation mode, this hot plug aware circuit comprises: a sensing circuit, in order to according to this output voltage, and produce a sensing signal, and a decision circuitry, couple with this sensing circuit, in order to according to this sensing signal, and produce this hot plug and judge signal, wherein this sensing circuit comprises: a bleeder circuit, in order to according to this output voltage, produces this sensing signal, and a mode-locking circuit, couple with this bleeder circuit and this decision circuitry respectively, be used to this light-emitting element circuit by after being removed under the situation coupled with this power stage circuit, and before this light-emitting element circuit puts in back, lock this sensing signal, and then lock this light-emitting component control circuit and operate in this and determine voltage mode control, and after putting in back after this light-emitting element circuit removes, to this light-emitting element circuit by before being removed under the situation coupled with this power stage circuit, lock this sensing signal, and then lock this light-emitting component control circuit and operate in this normal manipulation mode.
Wherein in a kind of preferred embodiment, this light-emitting element circuit should comprise: at least one light-emitting component, in order to couple with this power stage circuit, and in this normal manipulation mode, receives this output voltage; And a resistance initialization circuit, couple with this light-emitting component, be used to after this light-emitting element circuit returns back to the situation coupled with this power stage circuit, couple with this sensing circuit, to adjust this sensing signal, and then adjust this hot plug and judge signal, make when this light-emitting element circuit is after replying the situation coupled with this power stage circuit, this control signal generating circuit operates in this normal manipulation mode.
Wherein in a kind of preferred embodiment, this mode-locking circuit should comprise: an auxiliary separating volt circuit, couples with this bleeder circuit; And a turn-on control circuit, couple with this decision circuitry and this auxiliary separating volt circuit, this turn-on control circuit is controlled by hot plug and judges signal, and determine the whether conducting of this auxiliary separating volt circuit, wherein when this auxiliary separating volt circuit conducting, this bleeder circuit and this auxiliary separating volt circuit determine to sense signal jointly, and when this auxiliary separating volt circuit not conducting, are then determined separately to sense signal by this bleeder circuit.
In a kind of preferred embodiment, this hot plug aware circuit and this control signal generating circuit have different operating low pressure, and this decision circuitry comprises: a comparison circuit, couples with this sensing circuit, in order to according to this sensing signal and a reference signal, produce a comparative result signal; And a circuit for light coupler, couple with this comparison circuit, in order to according to this comparative result signal, produce this hot plug and judge signal.
In a kind of preferred embodiment, this light-emitting component control circuit more can comprise a high value circuit, be coupled between this input voltage and output voltage, be used to this light-emitting element circuit do not couple by with this power stage circuit, and under the situation of this power switch not conducting, this input voltage is converted to this output voltage.
For reaching above-mentioned purpose, say with regard to another viewpoint, the invention provides a kind of light-emitting element circuit, an output voltage can be coupled to for hot plug, this light-emitting element circuit is controlled by a light-emitting component control circuit, whether this light-emitting component control circuit is coupled to this output voltage according to this light-emitting element circuit and determines to operate in certain voltage control model or this normal manipulation mode, and this light-emitting element circuit comprises: multiple light-emitting component, in order to couple with this output voltage; And a resistance initialization circuit, couple with the plurality of light-emitting component, be used to this light-emitting element circuit when being coupled to this output voltage, this output voltage is determined according to the electric current flowing through this light-emitting element circuit, wherein when this light-emitting element circuit is coupled to this output voltage, with this light-emitting element circuit be not coupled to this output voltage time, this output voltage is different value.
Illustrate in detail below by specific embodiment, when the effect being easier to understand object of the present invention, technology contents, feature and reach.
Accompanying drawing explanation
Fig. 1 shows a kind of prior art LED power control circuit 100 schematic diagram;
Fig. 2 A-2J shows synchronous or asynchronous voltage-dropping type, booster type, back-pressure type, buck-boost type or rises back-pressure type power stage circuit;
Fig. 3 A and 3B shows first embodiment of the present invention;
Fig. 4 shows second embodiment of the invention;
Fig. 5 shows third embodiment of the invention;
Fig. 6 shows the 4th embodiment of the present invention;
Fig. 7 A-7D shows the five to eight embodiment of the present invention;
Fig. 8 shows the 9th embodiment of the present invention;
Fig. 9 shows the of the present invention ten embodiment;
Figure 10 shows the oscillogram of each signal in foregoing embodiments.
Symbol description in figure
10 LED circuits
100,200LED power control circuit
110,210 light-emitting component control circuits
111 resistance initialization circuits
120,220 power stage circuits
130,230 feedback circuits
210 light-emitting component control circuits
211 hot plug aware circuits
212 control signal generating circuit
213 high value circuit
2111 sensing circuits
2111a bleeder circuit
2111b mode-locking circuit
2111c turn-on control circuit
2111d auxiliary separating volt circuit
2112 decision circuitry
2112a comparison circuit
2112b optically coupled circuit
2112a comparison circuit
FB feedback signal
GATE controls signal
Iout output current
Vin input voltage
Vout output voltage
Embodiment
Refer to Fig. 3 A and 3B, show first embodiment of the present invention.As shown in Figure 3A, light-emitting component power control circuit 200 comprise light-emitting component control circuit 210, power stage circuit 220, with feedback circuit 230.In normal manipulation mode, light-emitting component control circuit 210 is according to feedback signal FB, produce and control signal, with in operating power level circuit 220, at least one power switch is (not shown, refer to Fig. 2 A-2J), and then input voltage vin is converted to output voltage Vout, for should light-emitting element circuit 11.Wherein, power stage circuit 220 is for example and without limitation to the power stage circuit as shown in Fig. 2 A-2J, also can be power stage circuit 120 as shown in Figure 1, and the connected mode of power stage circuit 120 light-emitting element circuits 11 as shown in application drawing 1 answers corresponding matching.Light-emitting element circuit 11 is for example and without limitation to single LED strip, LED circuit 10 as shown in Figure 1, the LED array etc. that can also form for the LED strip of multiple parallel connection.Feedback signal FB produces such as but not limited to by feedback circuit 230.Light-emitting component control circuit 210 comprises hot plug aware circuit 211 and controls signal generating circuit 212.Hot plug aware circuit 211, in order to according to output voltage Vout, produces hot plug and judges signal.After being removed under light-emitting element circuit 11 is by the situation coupled with power stage circuit 220, and after putting in back after light-emitting element circuit 11 removes, hot plug aware circuit 211 adjusts hot plug and judges signal, determines voltage mode control or aforementioned normal operations pattern to determine that light-emitting component control circuit 210 operates in.As shown in Figure 3 B, hot plug aware circuit 210 comprises sensing circuit 2111 and decision circuitry 2112.Sensing circuit 2111 in order to according to output voltage Vout, and produces sensing signal.Decision circuitry 2112 and sensing circuit 2111 couple, and in order to according to sensing signal, and produce hot plug and judge signal.Control signal generating circuit 212 to couple with power stage circuit 220 and hot plug aware circuit 211 respectively, in order to judge signal according to hot plug, adjustment controls signal, make after light-emitting element circuit 11 is removed in normal manipulation mode, operate in and determine voltage mode control, and output voltage Vout is regulated in predetermined level, this predetermined level should lower than the level of output voltage Vout during normal manipulation mode, and when light-emitting element circuit 11 is after replying the situation coupled with this power stage circuit, reply and operate in normal manipulation mode.So-called normal manipulation mode, is for example and without limitation to and regulates output current Iout in fixing predetermined current.
Fig. 4 shows second embodiment of the invention.The present embodiment shows in first embodiment, hot plug aware circuit 211 1 comparatively specific embodiment.As shown in Figure 4, hot plug aware circuit 211 comprises sensing circuit 2111 and decision circuitry 2112.Wherein, sensing circuit 2111 comprises bleeder circuit 2111a and mode-locking circuit 2111b.Bleeder circuit 2111a is in order to produce sensing signal according to output voltage Vout, and it is such as but not limited to the dividing potential drop obtaining output voltage Vout with bleeder circuit 2111a, as sensing signal.Mode-locking circuit 2111b couples with bleeder circuit 2111a and decision circuitry 2112 respectively, be used to light-emitting element circuit 11 by after being removed under the situation coupled with power stage circuit 220, and before light-emitting element circuit 11 puts in back, locking sensing signal, and then locking light-emitting component control circuit 210 operates in and determines voltage mode control.And after putting in back after light-emitting element circuit 11 removes, to light-emitting element circuit 11 by before being removed under the situation coupled with power stage circuit 220, locking sensing signal, and then locking light-emitting component control circuit 210 operates in normal manipulation mode.
Fig. 5 shows the 3rd embodiment of the present invention.The one comparatively specific embodiment of the present embodiment display decision circuitry 2112.As shown in Figure 5, decision circuitry 2112 comprises comparison circuit 2112a and circuit for light coupler 2112b.Wherein, comparison circuit 2112a and sensing circuit 2111 couple (referring to Fig. 4), in order to receive from the sensing signal of sensing circuit 2111, and compare sensing signal and reference signal and produce comparative result signal.Circuit for light coupler 2112b and comparison circuit 2112a couples, and in order to according to comparative result signal, produces hot plug and judges signal.As shown in the figure, in circuit for light coupler 2112b, light-emitting diode, such as but not limited to reception supply voltage, when comparative result signal is electronegative potential, produces light signal with turn-on transistor, and produces hot plug decision circuitry.Should be noted that, in the present embodiment, hot plug aware circuit 211 refers to Fig. 3 A with control signal generating circuit 212() there is different operating low pressure, hot plug aware circuit 211 is such as electrically connected with power stage circuit 220 and light-emitting element circuit 11, therefore having identical work low pressure, such as, is earthing potential; And it is much lower compared with the operating voltage of light-emitting element circuit 11 to control the common operating voltage of signal generating circuit 212 (between the flow-differential zone between working voltage and low pressure), therefore when the working voltage controlling signal generating circuit 212 is higher, higher and different from earthing potential work low pressure should be received, such as, reference potential (downward arrow) shown in Fig. 5.Wherein, circuit for light coupler 2112b is namely in order to transmit the signal between the circuit operating in different operating low pressure.But the foregoing is only wherein a kind of embodiment, in other embodiments, if control signal generating circuit 212 can share identical work low pressure with light-emitting element circuit 11, then can not need to carry out transmitting signals in the mode of optical coupling, and can directly connect, that is circuit for light coupler 2112b can be omitted.
Fig. 6 shows the 4th embodiment of the present invention.In the present embodiment display light-emitting component control circuit 210, the one embodiment more specifically of hot plug aware circuit 211.As shown in Figure 6, hot plug aware circuit 211 comprises sensing circuit 2111 and decision circuitry 2112.Wherein, sensing circuit 2111 comprises bleeder circuit 2111a and mode-locking circuit 2111b.Mode-locking circuit 2111b comprises turn-on control circuit 2111c and auxiliary separating volt circuit 2111d.Wherein, turn-on control circuit 2111c and decision circuitry 2112 couple, and are controlled by hot plug and judge signal, and determine auxiliary separating volt circuit 2111d whether conducting.Auxiliary separating volt circuit 2111d and bleeder circuit 2111a couples, when auxiliary separating volt circuit 2111d conducting, bleeder circuit 2111a and auxiliary separating volt circuit 2111d entirety forms a bleeder circuit jointly to determine to sense signal, when auxiliary separating volt circuit 2111d not conducting, then determined separately to sense signal by bleeder circuit 2111a, therefore turn-on control circuit 2111c is by determining whether conducting adjusts sensing signal to auxiliary separating volt circuit 2111d, when the level sensing signal changes, the hot plug that decision circuitry 2112 produces judges that signal changes thereupon (referring to Fig. 5).
Fig. 7 A-7D shows the five to eight embodiment of the present invention, the light-emitting element circuit 11 comparatively specific embodiment that this four embodiment citing displays are arranged in pairs or groups mutually with above-mentioned judgment mechanism.In these four embodiments, light-emitting element circuit 11 is such as but not limited to comprising LED circuit 10 and resistance initialization circuit 111.Wherein, LED circuit 10 is such as but not limited to comprising multiple light-emitting component, and LED strip as shown in the figure can also be other multiple light-emitting component connection in series-parallel or composition array certainly, in order to be coupled to output voltage Vout to receive output current (consulting Fig. 3 A).Resistance initialization circuit 111 and LED circuit 10 couple, and be used to after light-emitting element circuit 11 returns back to the situation coupled with power stage circuit 220, couple with sensing circuit 2111, to adjust sensing signal, and then adjustment hot plug judges signal.As shown in figures 7 a-7d, the mode that resistance initialization circuit 111 and LED circuit 10 couple can be series, parallel, connect after the mode such as to connect again after in parallel, parallel connection again.In detail, because in a normal operation mode, light-emitting component control circuit 210 controls output current Iout (referring to Fig. 3 A), if now light-emitting element circuit 11 only comprises LED circuit 10, then output voltage Vout uncertain, and by resistance initialization circuit 111, light-emitting element circuit 11 can be made to have the resistance determined, namely output voltage Vout like this can be the given value (be relevant to output current Iout and be multiplied by this resistance) determined.In a normal operation mode, output voltage Vout is relevant to output current Iout and is multiplied by this resistance, and output voltage Vout when just can be removed with LED circuit 10, is distinguished.
Fig. 8 shows the 9th embodiment of the present invention.The present embodiment shows in first embodiment, the another kind of execution mode of light-emitting component control circuit 210.As shown in the figure, light-emitting component control circuit 210 is except hot plug sensing circuit 211 is with except control signal generating circuit 212, can more comprise high value circuit 213, be coupled between this input voltage and output voltage, be used to light-emitting element circuit 11 do not couple by with power stage circuit 220, and under the situation of power switch not conducting, input voltage vin is converted to output voltage Vout.The present embodiment is intended to explanation, after being removed under light-emitting element circuit 11 is by the situation coupled with power stage circuit 220, and before light-emitting element circuit 11 puts in back, input voltage vin is converted to a kind of mode (i.e. the mode of operation of constant voltage mode) of output voltage Vout.Utilize high value circuit 213, in normal manipulation mode, because its resistance relative to power stage circuit 220 is very high, can be considered open circuit, therefore circuit is, by power stage circuit 220, input voltage vin is converted to output voltage Vout; After being removed under light-emitting element circuit 11 is by the situation coupled with power stage circuit 220, by control signal by power stage circuit 220 not conducting, therefore can be converted to output voltage Vout after the pressure drop of input voltage vin via high value circuit 213.Certain concept of the present invention is not limited thereto; high value circuit can not also be needed; in the constant voltage mode that light-emitting element circuit 11 is removed; such as adjustable power level circuit 220 is for the control objectives value of output voltage Vout; such as but not limited to the reference voltage (not shown) etc. compared with feedback signal by adjustment overvoltage protection mechanism (not shown), adjustment feedback signal, adjustment, output voltage Vout is regulated in predeterminated voltage.Thus, after can being removed under light-emitting element circuit 11 is by the situation coupled with power stage circuit 220, output voltage Vout is regulated in lower current potential, the risk maintaining high potential to prevent output voltage Vout and produce.
Fig. 9 shows the of the present invention ten embodiment.The present embodiment be intended to illustrate bleeder circuit 2111a, mode-locking circuit 2111b, with the turn-on control circuit 2111c in mode-locking circuit 2111b and auxiliary separating volt circuit 2111d comparatively specific embodiment.In addition, the present embodiment is application concept of the present invention also, can combine the element in aforementioned all embodiments, also within the scope of the invention.As shown in the figure, bleeder circuit 2111a is for example and without limitation to the resistance of series connection, is coupled to output voltage Vout, and gets its dividing potential drop as sensing signal, to input comparison circuit 2112a.Comparison circuit 2112a compares sensing signal and reference signal, such as in normal manipulation mode, reference signal is higher than sensing signal, and the comparative result signal that comparison circuit exports maintains high potential, hot plug judges that signal such as also maintains high potential, represents light-emitting element circuit 11 and still couples with power stage circuit 220.In a normal operation mode, the turn-on control circuit 2111c conducting in mode-locking circuit 2111b, forms the short circuit of bypass and makes auxiliary separating volt circuit 2111d be equal to not conducting, therefore senses signal and keeps below reference signal.
On the other hand, when light-emitting element circuit 11 removes, the situation namely coupled with power stage circuit 220 becomes when not coupling, output voltage Vout moment raises suddenly, sensing signal is higher than reference signal, and the comparative result signal that comparison circuit exports reduces to electronegative potential from high potential, hot plug judges that signal such as also changes electronegative potential into by high potential.Now, the turn-on control circuit 2111c not conducting in mode-locking circuit 2111b, therefore auxiliary separating volt circuit 2111d conducting and generation effect, determine to sense signal jointly with bleeder circuit 2111a, now senses signal higher than reference signal.Signal is judged according to hot plug, the control signal that control signal generating circuit 212 produces makes power stage circuit 220 not conducting, therefore output voltage Vout is converted to after the pressure drop of input voltage vin via high value circuit 213, output voltage Vout declines from the state raised instantaneously and is maintained lower predetermined level, enters and determines voltage mode control.Although determining in voltage mode control, output voltage is reducing, and due to turn-on control circuit 2111c not conducting, auxiliary separating volt circuit 2111d and bleeder circuit 2111a determines to sense signal jointly, therefore still sensing signal can be locked as higher than reference signal.Until after light-emitting element circuit 11 reinstalls, utilize the resistance initialization circuit in light-emitting element circuit 11, make output voltage Vout change, sensing signal is brought down below reference signal accordingly, makes operator scheme come back to normal manipulation mode.
Figure 10 shows the oscillogram of each signal in foregoing embodiments.As shown in the figure, after circuit start, input voltage vin and output voltage Vout rise, and Iout regulates in fixing predetermined current by LED power control circuit.When LED circuit is removed in normal manipulation mode, output current Iout is down to zero current, and output voltage Vout rises instantaneously, output voltage Vout related signal or output current Iout related signal can be sensed, and adjust hot plug sensing signal, determine voltage mode control to enter, in reach remove rear target time, output voltage Vout is regulated in lower predetermined level.
When LED circuit reinstalls, output voltage Vout reduces instantaneously, now adjustable heat plug sensing signal, to reply normal manipulation mode, in reach reinstall rear target time, output current Iout is regulated in fixing predetermined current.
Below for preferred embodiment, the present invention is described, just the above, be only and make those skilled in the art be easy to understand content of the present invention, be not used for limiting interest field of the present invention.Under same spirit of the present invention, those skilled in the art can think and various equivalence change.Such as, two circuit that in each embodiment, icon directly connects or interelement, can plant other circuit or element of not affecting major function; And for example, light-emitting component is not limited to the light-emitting diode (LED) shown in each embodiment, also can extend to all with the element of current drives; For another example, the meaning representated by digital signal low and high level can be exchanged, and only needs corresponding modification circuits to the processing mode of signal; Again such as, the input of amplifying circuit and comparison circuit is positive and negative can be exchanged, and only needs the signal processing mode of corresponding correction circuit.All this kind, all teaching according to the present invention can analogize and obtain, and therefore, scope of the present invention should contain above-mentioned and other all equivalence change.
Claims (11)
1. a light-emitting component control circuit, be used in a normal manipulation mode, produce one and control signal to operate a power stage circuit, and an input voltage is converted to an output voltage, a light-emitting element circuit is given to supply an output current, it is characterized in that, described light-emitting component control circuit comprises:
One hot plug aware circuit, in order to according to this output voltage, produce a hot plug and judge signal, after making to be removed under this light-emitting element circuit is by the situation coupled with this power stage circuit, and after putting in back after this light-emitting element circuit removes, adjust this hot plug and judge signal, to determine that this light-emitting component control circuit operates in certain voltage control model or this normal manipulation mode; And
One controls signal generating circuit, couple with this power stage circuit and this hot plug aware circuit respectively, in order to judge signal according to this hot plug, adjust this control signal, make, after this light-emitting element circuit is removed in normal manipulation mode, operates in this and determine voltage mode control, and this output voltage is regulated in a predetermined level, and when this light-emitting element circuit is after replying the situation coupled with this power stage circuit, operate in this normal manipulation mode.
2. light-emitting component control circuit as claimed in claim 1, wherein, this hot plug aware circuit comprises:
One sensing circuit, in order to according to this output voltage, and produces a sensing signal; And
One decision circuitry, couples with this sensing circuit, in order to according to this sensing signal, and produces this hot plug and judges signal.
3. light-emitting component control circuit as claimed in claim 2, wherein, this sensing circuit comprises:
One bleeder circuit, in order to according to this output voltage, produces this sensing signal; And
One mode-locking circuit, couple with this bleeder circuit and this decision circuitry respectively, be used to this light-emitting element circuit by after being removed under the situation coupled with this power stage circuit, and before this light-emitting element circuit puts in back, lock this sensing signal, and then lock this light-emitting component control circuit and operate in this and determine voltage mode control; And after putting in back after this light-emitting element circuit removes, to this light-emitting element circuit by before being removed under the situation coupled with this power stage circuit, lock this sensing signal, and then lock this light-emitting component control circuit and operate in this normal manipulation mode.
4. light-emitting component control circuit as claimed in claim 3, wherein, this light-emitting element circuit comprises:
At least one light-emitting component, in order to couple with this power stage circuit, and in this normal manipulation mode, receives this output current; And
One resistance initialization circuit, couples with this light-emitting component, is used to after this light-emitting element circuit returns back to the situation coupled with this power stage circuit, couple with this sensing circuit, to adjust this sensing signal, and then adjusts this hot plug and judges signal.
5. light-emitting component control circuit as claimed in claim 3, wherein, this mode-locking circuit comprises:
One auxiliary separating volt circuit, couples with this bleeder circuit; And
One turn-on control circuit, couple with this decision circuitry and this auxiliary separating volt circuit, this turn-on control circuit is controlled by hot plug and judges signal, and determine the whether conducting of this auxiliary separating volt circuit, wherein when this auxiliary separating volt circuit conducting, this bleeder circuit and this auxiliary separating volt circuit determine to sense signal jointly, and when this auxiliary separating volt circuit not conducting, are then determined separately to sense signal by this bleeder circuit.
6. light-emitting component control circuit as claimed in claim 1, wherein, this hot plug aware circuit and this control signal generating circuit have different operating low pressure, and this decision circuitry comprises:
One comparison circuit, couples with this sensing circuit, in order to according to this sensing signal and a reference signal, produces a comparative result signal; And
One circuit for light coupler, couples with this comparison circuit, in order to according to this comparative result signal, produces this hot plug and judges signal.
7. light-emitting component control circuit as claimed in claim 1, wherein, also comprise a high value circuit, be coupled between this input voltage and output voltage, be used to this light-emitting element circuit do not couple by with this power stage circuit, and under the situation of this power switch not conducting, this input voltage step-down is converted to this output voltage.
8. one kind for the hot plug aware circuit in light-emitting component control circuit, this light-emitting component control circuit is in a normal manipulation mode, produce one and control signal to operate a power stage circuit, and an input voltage is converted to an output voltage, a light-emitting element circuit is given to supply an output current, wherein this hot plug aware circuit is in order to according to this output voltage, produce a hot plug and judge signal, after making to be removed under this light-emitting element circuit is by the situation coupled with this power stage circuit, and after putting in back after this light-emitting element circuit removes, adjust this hot plug and judge signal, to determine that this light-emitting component control circuit operates in certain voltage control model or this normal manipulation mode, it is characterized in that, this hot plug aware circuit comprises:
One sensing circuit, in order to according to this output voltage, and produces a sensing signal; And
One decision circuitry, couples with this sensing circuit, in order to according to this sensing signal, and produces this hot plug and judges signal;
Wherein this sensing circuit comprises:
One bleeder circuit, in order to according to this output voltage, produces this sensing signal; And
One mode-locking circuit, couple with this bleeder circuit and this decision circuitry respectively, be used to this light-emitting element circuit by after being removed under the situation coupled with this power stage circuit, and before this light-emitting element circuit puts in back, lock this sensing signal, and then lock this light-emitting component control circuit and operate in this and determine voltage mode control; And after putting in back after this light-emitting element circuit removes, to this light-emitting element circuit by before being removed under the situation coupled with this power stage circuit, lock this sensing signal, and then lock this light-emitting component control circuit and operate in this normal manipulation mode.
9. as claimed in claim 8 for the hot plug aware circuit in light-emitting component control circuit, wherein, this mode-locking circuit comprises:
One auxiliary separating volt circuit, couples with this bleeder circuit; And
One turn-on control circuit, couple with this decision circuitry and this auxiliary separating volt circuit, this turn-on control circuit is controlled by hot plug and judges signal, and determine the whether conducting of this auxiliary separating volt circuit, wherein when this auxiliary separating volt circuit conducting, this bleeder circuit and this auxiliary separating volt circuit determine to sense signal jointly, and when this auxiliary separating volt circuit not conducting, are then determined separately to sense signal by this bleeder circuit.
10. as claimed in claim 8 for the hot plug aware circuit in light-emitting component control circuit, wherein, this hot plug aware circuit and this control signal generating circuit have different operating low pressure, and this decision circuitry comprises:
One comparison circuit, couples with this sensing circuit, in order to according to this sensing signal and a reference signal, produces a comparative result signal; And
One circuit for light coupler, couples with this comparison circuit, in order to according to this comparative result signal, produces this hot plug and judges signal.
11. 1 kinds of light-emitting element circuits, an output voltage can be coupled to for hot plug, this light-emitting element circuit is controlled by a light-emitting component control circuit, whether this light-emitting component control circuit is coupled to this output voltage according to this light-emitting element circuit and determines to operate in certain voltage control model or this normal manipulation mode, it is characterized in that, this light-emitting element circuit comprises:
Multiple light-emitting component, in order to couple with this output voltage; And
One resistance initialization circuit, couples with the plurality of light-emitting component, is used to this light-emitting element circuit when being coupled to this output voltage, determines this output voltage according to the electric current flowing through this light-emitting element circuit,
Wherein when this light-emitting element circuit is coupled to this output voltage, with this light-emitting element circuit be not coupled to this output voltage time, this output voltage is different value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310215127.0A CN104219821A (en) | 2013-05-31 | 2013-05-31 | Light-emitting element control circuit and hot-plug sensing circuit therein as well as light-emitting element circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310215127.0A CN104219821A (en) | 2013-05-31 | 2013-05-31 | Light-emitting element control circuit and hot-plug sensing circuit therein as well as light-emitting element circuit |
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| CN104219821A true CN104219821A (en) | 2014-12-17 |
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| CN201310215127.0A Pending CN104219821A (en) | 2013-05-31 | 2013-05-31 | Light-emitting element control circuit and hot-plug sensing circuit therein as well as light-emitting element circuit |
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| CN202121839U (en) * | 2011-06-20 | 2012-01-18 | 上海新进半导体制造有限公司 | Reload decision circuit of switch power supply |
| CN202135368U (en) * | 2011-06-29 | 2012-02-01 | 林万炯 | Control device realizing hot plug of LED load |
| CN102752912A (en) * | 2012-06-01 | 2012-10-24 | 台达电子企业管理（上海）有限公司 | Light-emitting diode (LED) driving circuit |
| US20120274235A1 (en) * | 2011-04-26 | 2012-11-01 | Green Solution Technology Co., Ltd. | Power Converting Circuit and Converting Controller |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120274235A1 (en) * | 2011-04-26 | 2012-11-01 | Green Solution Technology Co., Ltd. | Power Converting Circuit and Converting Controller |
| CN202121839U (en) * | 2011-06-20 | 2012-01-18 | 上海新进半导体制造有限公司 | Reload decision circuit of switch power supply |
| CN202135368U (en) * | 2011-06-29 | 2012-02-01 | 林万炯 | Control device realizing hot plug of LED load |
| CN102752912A (en) * | 2012-06-01 | 2012-10-24 | 台达电子企业管理（上海）有限公司 | Light-emitting diode (LED) driving circuit |
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Application publication date: 20141217 |