CN106773639A - Power module positive logic enables electrifying control circuit - Google Patents
Power module positive logic enables electrifying control circuit Download PDFInfo
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- CN106773639A CN106773639A CN201610996854.9A CN201610996854A CN106773639A CN 106773639 A CN106773639 A CN 106773639A CN 201610996854 A CN201610996854 A CN 201610996854A CN 106773639 A CN106773639 A CN 106773639A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B7/00—Arrangements for obtaining smooth engagement or disengagement of automatic control
- G05B7/02—Arrangements for obtaining smooth engagement or disengagement of automatic control electric
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Abstract
The present invention proposes that a kind of power module positive logic enables electrifying control circuit, including：Diode circuit, its anode connects the Enable Pin of power module, and its negative terminal connects the input negative terminal of power module；Photoelectric isolating coupler, the colelctor electrode of its triode receives input voltage, and the emitter stage of its triode connects the negative terminal of diode circuit；Interval turn-on control circuit, its monitoring voltage for receiving a monitored power supply, when being no more than upper voltage limit to exceed lower voltage limit in monitoring voltage, control the LEDs ON of photoelectric isolating coupler, so that the triode ON of photoelectric isolating coupler, so as to the Enable Pin of power module disconnects input negative terminal, power module output voltage；When monitoring voltage exceedes upper voltage limit, the light emitting diode cut-off of photoelectric isolating coupler is controlled, so that the triode cut-off of photoelectric isolating coupler, so that the Enable Pin connection input negative terminal of power module, power module not output voltage.Prevent electricity from damaging load.
Description
Technical field
The present invention relates to power module electrifying control circuit, more particularly to a kind of power module positive logic enables upper automatically controlled
Circuit processed.
Background technology
, it is necessary to multiple power supplies are powered for some loads, and power supply order to multiple power supplies has strict demand.Than
Such as power amplifier, it is necessary to two kinds of voltages are pressed in grid voltage and leakage, and must could be allowed in the case of grid voltage is normal plus leakage pressure.Can
The control of upper electric order is carried out using the power module with ena-bung function, power module is enabled has positive logic and negative logic
Point, negative logic enable upper electric control refer to enable pin it is hanging when, power module is closed without output, enables pin and input negative terminal phase
Lian Shi, electricity output voltage on power module is controlled relatively easy.Positive logic enables upper electric control and enables upper electric control with negative logic
Contrast, controls relative complex.
It is existing to enable that electrifying control circuit is often simply simple to judge wherein power supply all the way based on power module positive logic
The presence or absence of voltage controls upper electricity and the shut-off of another road power supply, or the monitoring wherein magnitude of voltage of power supply all the way, however it is necessary that
With reference to chips such as single-chip microcomputer, AD samplings, circuit is more complicated.For example just there is the technical problem in following two mode.
First, Publication No. CN103199498A disclosed in Patent Office of the People's Republic of China, entitled " power supply enables the special of control circuit
In sharp application documents, disclose a kind of power supply and enable control circuit, the circuit is suitable for inclusion in voltage input end, voltage output end
And the power-supply controller of electric of Enable Pin.Wherein, the bleeder circuit that power supply is enabled in control circuit carries out partial pressure to power input
Sampling, power supply enables the first switch devices use partial pressure sampled result in control circuit to perceive the voltage change of voltage input end
Change, Enable Pin is set to effectively, in voltage input end with when the magnitude of voltage of voltage input end is greater than or equal to voltage output end
Magnitude of voltage Enable Pin is set to when being less than voltage output end it is invalid, so as to control power supply to export, to avoid in lower electric process
There is not dull voltage decline higher than voltage input end and voltage output end in the magnitude of voltage for voltage output end occur.
Second, Publication No. CN103019127A disclosed in Patent Office of the People's Republic of China, the patent of entitled " electrifying control circuit "
In application documents, a kind of electrifying control circuit, including some power supply chips and a timing controller, each power supply core are disclosed
Piece includes a power supply normal end and a power supply Enable Pin, and the timing controller includes several inputs and several outputs
End, each input corresponds to an output end, and be connected with a power supply normal end, corresponding output end with unify power supply chip
The connection of power supply Enable Pin, wherein, each output end is used to exporting an Enable signals and causes that corresponding power supply chip starts, right
The input answered is used to receive the Power Good signals of corresponding power chip, and the timing controller is used in output one
After Enable signals cause that corresponding power supply chip starts, next output end is controlled to export after receiving Power Good signals
Enable signals are to corresponding power supply chip so that the corresponding power supply chip starts, and controls those power supply chip sequential starts.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of power module positive logic and enable electrifying control circuit, make
On the basis of positive logic enable power module, wherein whether the magnitude of voltage of power supply is anti-to stop loss in normal range (NR) all the way for monitoring
Bad load.
To solve the above problems, the present invention proposes that a kind of power module positive logic enables electrifying control circuit, including：Two poles
Pipe circuit, its anode connects the Enable Pin of the power module, and its negative terminal connects the input negative terminal of the power module；And extremely
Few one-level control unit；
Include per described control unit：Photoelectric isolating coupler and interval turn-on control circuit；
The photoelectric isolating coupler of first order control unit, the colelctor electrode of its triode receives input voltage, its triode
Emitter stage connect the negative terminal of the diode circuit；
Every grade of described interval turn-on control circuit, its monitoring voltage for receiving a monitored power supply, in the prison
When survey voltage exceedes lower voltage limit and is no more than upper voltage limit, the LEDs ON of the photoelectric isolating coupler is controlled,
So that the triode ON of the photoelectric isolating coupler, so that the Enable Pin of the power module disconnects input negative terminal, power supply
Module output voltage；When the monitoring voltage exceedes upper voltage limit, the light emitting diode of the photoelectric isolating coupler is controlled
Cut-off, so that the triode cut-off of the photoelectric isolating coupler, so that the Enable Pin connection input negative terminal of the power module,
Power module not output voltage.
According to one embodiment of present invention, the input voltage by be input to after the first bleeder circuit partial pressure photoelectricity every
From the colelctor electrode of coupler triode, first bleeder circuit at least includes the first resistor and second resistance of series connection, public
The colelctor electrode of point connection photoelectric isolating coupler triode.
According to one embodiment of present invention, the diode circuit includes：
First diode, its positive pole connects the Enable Pin of the power module as the anode of the diode circuit, its
Negative pole connects the emitter stage of the triode of the photoelectric isolating coupler as the negative terminal of the diode circuit；
3rd resistor, its first end connects the negative pole of first diode, and its second end connects the power module
Input negative terminal.
According to one embodiment of present invention, the interval turn-on control circuit includes：
First controllable accurate source of stable pressure, the anode of the monitored power supply of its positive pole connection, its negative pole is connected by the 4th resistance
Photoelectric isolating coupler, and its negative pole connects the negative terminal of monitored power supply by the 5th resistance；First controllable accurate source of stable pressure is led
Lead to, then the LEDs ON of photoelectric isolating coupler；The first controllable accurate source of stable pressure ends, then photoelectric isolating coupler
Light emitting diode ends；
Second bleeder circuit, its two ends are connected between the negative terminal of monitored power supply and anode, its point of press bond
The reference edge of the first controllable accurate source of stable pressure；
Second controllable accurate source of stable pressure, the anode of the monitored power supply of its positive pole connection, its negative pole connects second partial pressure
The partial pressure end of circuit；
3rd bleeder circuit, its two ends are connected between the negative terminal of monitored power supply and anode, its point of press bond
The reference edge of the second controllable accurate source of stable pressure；
Wherein, when the monitoring voltage exceedes lower voltage limit and is no more than upper voltage limit, the partial pressure of the 3rd bleeder circuit
It is not enough to control the second controllable accurate source of stable pressure conducting so that the partial pressure of the second bleeder circuit is enough to control the first controllable accurate steady
Potential source is turned on；When the monitoring voltage exceedes upper voltage limit, the partial pressure of the 3rd bleeder circuit is enough to control the second controllable accurate
Source of stable pressure is turned on, in current distributing to the second controllable accurate source of stable pressure of the second bleeder circuit so that the first controllable accurate voltage stabilizing
The reference voltage terminal in source is reduced and ended.
According to one embodiment of present invention, second bleeder circuit at least includes the 6th resistance of series connection and the 7th electricity
Resistance, common point connects the reference edge of the first controllable accurate source of stable pressure and exports its partial pressure；And/or, the 3rd bleeder circuit is extremely
Few the 8th resistance and the 9th resistance for including series connection, common point connects the reference edge of the second controllable accurate source of stable pressure and exports its point
Pressure.
According to one embodiment of present invention, the photoelectric isolating coupler of the control unit of next stage, the collection of its triode
Electrode receives input voltage, and the voltage of the emitter stage of its triode is coupled as the Phototube Coupling that input voltage is input into previous stage
The colelctor electrode of device triode.
After adopting the above technical scheme, the present invention has the advantages that compared to existing technology：
Can effectively control electric on the power module enabled with positive logic and power off, without external power source；Can monitor at least
The voltage of power supply is monitored all the way, and when this road, monitoring power supply monitoring voltage just controls the defeated of another road power supply in normal range (NR)
Go out, and do not influence the isolation between power supply；Circuit structure is simple, safe and reliable without other power supply, it is possible to decrease circuit cost.
Brief description of the drawings
Fig. 1 is the structural representation of the power module positive logic enable electrifying control circuit of one embodiment of the invention；
Fig. 2 is the concrete application schematic diagram of the power module positive logic enable electrifying control circuit of Fig. 1 embodiments；
Fig. 3 is the structural representation of the power module positive logic enable electrifying control circuit of another embodiment of the present invention.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
Elaborate many details in order to fully understand the present invention in the following description.But the present invention can be with
Much it is different from other manner described here to implement, those skilled in the art can be in the situation without prejudice to intension of the present invention
Under do similar popularization, therefore the present invention is not limited by following public specific implementation.
The power module positive logic of the embodiment of the present invention enables electrifying control circuit, including：Diode circuit, and at least
One-level control unit.The anode of diode circuit connects the Enable Pin of power module, the negative terminal connection power supply mould of diode circuit
The input negative terminal of block.The positive terminal voltage of diode circuit is ended when being less than negative terminal.
Every grade of control unit includes：Photoelectric isolating coupler and interval turn-on control circuit.Every grade of Phototube Coupling coupling
Annexation and respective circuit structure between device and interval turn-on control circuit can be with identical, and certainly, first order control is single
Unit needs to connect power module, and afterbody control unit needs to connect Input voltage terminal.Every grade of control unit respectively monitors a quilt
The monitoring voltage of power supply is monitored, if having multistage control unit, just may be used when every grade of monitoring voltage is all in normal range (NR)
So that power module enables upper electricity.
Referring to Fig. 1, in one embodiment, power module positive logic enables electrifying control circuit only including first order control
Unit, the monitoring voltage of the monitored power supply of monitoring one, but not limited to this.
The colelctor electrode of the triode of the photoelectric isolating coupler N1 of first order control unit receives input voltage, Phototube Coupling
The emitter stage of the triode of coupler N1 connects the negative terminal of diode circuit.Photoelectric isolating coupler N1 can realize controlled upper electricity
The power module of enable can be mutually isolated with monitored power supply.Sent out during the LEDs ON of photoelectric isolating coupler N1
Light, so that the triode (phototriode) of photoelectric isolating coupler N1 is turned on, input voltage will flow into diode circuit, make
The voltage for obtaining diode circuit negative terminal is lifted, thus diode circuit cut-off, and the Enable Pin EN of power module is hanging, positive logic
The power module of electricity is so as to enable upper electricity, output voltage in enable；And during the light emitting diode cut-off of photoelectric isolating coupler N1,
Triode accordingly ends, and diode circuit conducting, the Enable Pin EN of power module is communicated to the power supply mould by diode circuit
Input negative terminal-the IN of block, power module is so as to close not output voltage.
The interval turn-on control circuit M1 of first order control unit receives the monitoring voltage V of a monitored power supplymon1.It is interval
Turn-on control circuit M1 is in monitoring voltage Vmon1When upper voltage limit (normal range (NR)) is no more than more than lower voltage limit, photoelectricity is controlled
The LEDs ON of isolating coupler N1, so that the triode ON of photoelectric isolating coupler N1, diode circuit is thus
Cut-off, so that the Enable Pin EN of power module disconnects input negative terminal-IN, power module output voltage；Interval turn-on control circuit
M1 is in monitoring voltage Vmon1During more than upper voltage limit (exceeding normal range (NR)), the light emitting diode of control photoelectric isolating coupler N1
Cut-off, so that the triode cut-off of photoelectric isolating coupler N1, diode circuit thus conducting, so that the Enable Pin of power module
EN connects input negative terminal-IN, power module not output voltage.
The electrifying control circuit of the embodiment of the present invention can be efficiently controlled in the monitoring voltage V of monitored power supplymon1Place
When in normal range (NR), another road positive logic is set to enable electricity on power module.In the embodiment of more than one-level control unit, its
The interval turn-on control circuit of the control unit of his level can be identical with the interval turn-on control circuit M1 of first order control unit.
Optionally, input voltage VinBy being input to photoelectric isolating coupler N1 triodes after the first bleeder circuit partial pressure
Colelctor electrode, the first bleeder circuit at least includes the first resistor R1 and second resistance R2 of series connection, common point connection Phototube Coupling coupling
The colelctor electrode of clutch N1 triodes.In the only embodiment of first order control unit, the Phototube Coupling of first order control unit
The colelctor electrode of the triode of coupling pipe N1 connects the common point (partial pressure end) of the first bleeder circuit.In more than first order control unit
Embodiment in, the colelctor electrode of the triode of the Phototube Coupling of afterbody control unit coupling pipe connects the first bleeder circuit
Common point, and the colelctor electrode of remaining grade of triode of the Phototube Coupling coupling pipe of control unit then connects rear stage control unit
Emitter stage.
Preferably, diode circuit includes：First diode V1 and 3rd resistor R3.The positive pole conduct of the first diode V1
The anode of diode circuit connects the negative pole of the Enable Pin EN, the first diode V1 of power module as the negative terminal of diode circuit
The emitter stage of the triode of connection photoelectric isolating coupler N1.The first end of 3rd resistor R3 connects the negative of the first diode V1
Pole, second end of 3rd resistor R3 connects the input negative terminal of power module.Pipe is coupled in the Phototube Coupling of diode circuit connection
When the triode of N1 ends, diode V1 conductings；And during triode ON, because 3rd resistor R3 is by electricity, thus diode V1
The voltage lifting of negative pole, diode V1 cut-offs.
In one embodiment, with continued reference to Fig. 1, interval turn-on control circuit M1 can include：First controllable accurate is steady
Potential source V2, the second bleeder circuit, the second controllable accurate source of stable pressure V3 and the 3rd bleeder circuit.
The anode of the monitored power supply of positive pole connection of the first controllable accurate source of stable pressure V2, the first controllable accurate source of stable pressure V2's
Negative pole connects photoelectric isolating coupler N1 by the 4th resistance R4, and the negative pole of the first controllable accurate source of stable pressure N1 also passes through the 5th
The negative terminal of the monitored power supply of resistance R5 connections.First controllable accurate source of stable pressure V2 is turned on, then photoelectric isolating coupler N1's is luminous
Diode cathode voltage cathode voltage and turn on.First controllable accurate source of stable pressure V2 ends, then the hair of photoelectric isolating coupler N1
The positive and negative pole tension of optical diode is identical and ends.
The two ends of the second bleeder circuit are connected between the negative terminal of monitored power supply and anode, the second bleeder circuit
Divide the reference edge of press bond the first controllable accurate source of stable pressure V2, the partial pressure of the second bleeder circuit is higher than the first controllable accurate voltage stabilizing
During the reference voltage of source V2, the first controllable accurate source of stable pressure V2 conductings, otherwise the first controllable accurate source of stable pressure V2 cut-offs.
The anode of the monitored power supply of positive pole connection of the second controllable accurate source of stable pressure V3, the second controllable accurate source of stable pressure V3's
Negative pole connects the partial pressure end of the second bleeder circuit.When second controllable accurate source of stable pressure V3 is turned on, the electric current on the second bleeder circuit
Branch on the second controllable accurate source of stable pressure V3, thus partial pressure reduction, less than the reference voltage of the first controllable accurate source of stable pressure V2,
So that the first controllable accurate source of stable pressure V2 ends.Second controllable accurate source of stable pressure V3 does not influence the second bleeder circuit then when ending
Normal partial pressure, the first controllable accurate source of stable pressure V2 normallies.
The two ends of the 3rd bleeder circuit are connected between the negative terminal of monitored power supply and anode, the 3rd bleeder circuit
Divide the reference edge of press bond the second controllable accurate source of stable pressure V3.The partial pressure of the 3rd bleeder circuit is higher than the second controllable accurate voltage stabilizing
During the reference voltage of source V3, the second controllable accurate source of stable pressure V3 conductings, otherwise the second controllable accurate source of stable pressure V3 cut-offs.
Wherein, in monitoring voltage Vmon1When being no more than upper voltage limit more than lower voltage limit, the partial pressure of the 3rd bleeder circuit
It is not enough to control the second controllable accurate source of stable pressure V3 conductings so that the partial pressure of the second bleeder circuit is enough to control the first controllable accurate
Source of stable pressure V2 is turned on.When monitoring voltage exceedes upper voltage limit, the partial pressure of the 3rd bleeder circuit is enough to control the second controllable accurate
Source of stable pressure V3 is turned on, in the current distributing of the second bleeder circuit to the second controllable accurate source of stable pressure V3 so that the first controllable accurate
The reference voltage terminal of source of stable pressure V2 is reduced and ended.
Optionally, the second bleeder circuit at least includes the 6th resistance R6 and the 7th resistance R7 of series connection, common point connection the
The reference edge of one controllable accurate source of stable pressure V2 simultaneously exports its partial pressure.And/or, the 3rd bleeder circuit at least includes the 8th electricity of series connection
Resistance R8 and the 9th resistance R9, common point connects the reference edge of the second controllable accurate source of stable pressure V3 and exports its partial pressure.It is appreciated that
Each bleeder circuit can include more multicomponent device, with different connected modes, simply making shown in the present embodiment and accompanying drawing
It is example, can be deformed accordingly as needed.
Referring to Fig. 2, in a specific embodiment, input voltage VinIt is 48V, is monitored the monitoring voltage V of power supplymon1
It is -5V (- 5V is negative terminal, and ground is anode) that normal range (NR) is -4.6V~-5.26V.Remaining component parameter such as Fig. 2, specifically not
As limitation.Wherein, the resistance of first resistor R1 is 3.9k Ω, second resistance R2, the 5th resistance R5, the 6th resistance R6 and the 8th
The resistance of resistance R8 is 5.1k Ω, and the resistance of 3rd resistor R3 is 510 Ω, and the resistance of the 4th resistance R4 is 300 Ω, the 7th resistance
The resistance of R7 is 4.7k Ω, the first controllable accurate source of stable pressure V2 and the second controllable accurate for the resistance of 6.2k Ω, the 9th resistance R9
Source of stable pressure V3 can use TL431 type controllable accurate source of stable pressure, be a kind of adjustable integrated regulator in three ends, Phototube Coupling coupling
Device N1 can use BAS16H type diodes using TLP281 type photoelectrical couplers, diode V1.
After device power-on, there is input voltage VinWhen, power module Enable Pin EN passes through diode V1 and 3rd resistor R3
Connection power module input negative terminal-IN, due to being that positive logic is enabled, power module closes no voltage output.Now need prison
Survey voltage Vmon1Power supply do not go up electric control, i.e. -5V voltages have been exported, when monitoring voltage be more than lower voltage limit -4.6V, pass through
6th resistance R6 and the 7th resistance R7 partial pressures are 4.6V × 6.2/ (5.1+6.2)=2.524V, higher than the first controllable accurate voltage stabilizing
Reference voltage 2.5V, the first controllable accurate source of stable pressure V2 conducting of source V2, light emitting diode is led in making photoelectric isolating coupler N1
Logical, phototriode is turned in making photoelectric isolating coupler N1, makes diode V1 cathode voltages higher than anode voltage, diode V1
Cut-off, power module Enable Pin EN is hanging, and power module enables upper electricity, output voltage.
It is 5.26V by the 8th resistance R8 and the 9th resistance R9 partial pressures when monitored voltage is more than upper voltage limit -5.26V
× 4.7/ (5.1+4.7)=2.523V, higher than the reference voltage terminal 2.5V of the second controllable accurate source of stable pressure V3, the second controllable accurate
Source of stable pressure V3 is turned on, and makes the ginseng of the 6th resistance R6 and the 7th resistance R7 common-node voltages less than the first controllable accurate source of stable pressure V2
Terminal voltage is examined, the first controllable accurate source of stable pressure V2 ends, and light emitting diode is not turned in making photoelectrical coupler N1, makes photoelectric coupling
Phototriode cut-off in device N1, power module enables pin EN and power module input is connected with 3rd resistor R3 by diode V1
Negative terminal-IN, power module closes no voltage output.
In one embodiment, referring to Fig. 3, the control unit of electrifying control circuit including two-stage, two control units
Interval turn-on control circuit M1 is identical with M2.The colelctor electrode connection of the photoelectric isolating coupler N2 triodes of second level control unit
Input voltage terminal receives input voltage, and the voltage of the emitter stage of the photoelectric isolating coupler triode N2 of second level control unit is made
It is input into for the input voltage of the photoelectric isolating coupler N1 of first order control unit to the Phototube Coupling coupling of first order control unit
The colelctor electrode of the triode of clutch N1.Expanded circuit as shown in Figure 3, can monitor the monitoring voltage of the monitored power supply of two-way
Vmon1 and Vmon2, as the monitoring voltage V of two-way power supplymon1 and Vmon2 all in normal range (NR) when, power module enables upper electricity, defeated
Go out voltage, otherwise power module closes no voltage output.It is of course possible to extend the control unit of more stages as needed.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting claim, any this area
Technical staff without departing from the spirit and scope of the present invention, can make possible variation and modification, therefore of the invention
The scope that protection domain should be defined by the claims in the present invention is defined.
Claims (6)
1. a kind of power module positive logic enables electrifying control circuit, it is characterised in that including：Diode circuit, its anode connects
The Enable Pin of the power module is connect, its negative terminal connects the input negative terminal of the power module；And at least one-level control unit；
Include per described control unit：Photoelectric isolating coupler and interval turn-on control circuit；
The photoelectric isolating coupler of first order control unit, the colelctor electrode of its triode receives input voltage, the hair of its triode
Emitter-base bandgap grading connects the negative terminal of the diode circuit；
Every grade of described interval turn-on control circuit, its monitoring voltage for receiving a monitored power supply, in the monitoring electricity
When pressure exceedes lower voltage limit and is no more than upper voltage limit, the LEDs ON of the photoelectric isolating coupler is controlled, so that
The triode ON of the photoelectric isolating coupler, so that the Enable Pin of the power module disconnects input negative terminal, power module
Output voltage；When the monitoring voltage exceedes upper voltage limit, the light emitting diode cut-off of the photoelectric isolating coupler is controlled,
So that the triode cut-off of the photoelectric isolating coupler, so that the Enable Pin connection input negative terminal of the power module, power supply
Module not output voltage.
2. power module positive logic as claimed in claim 1 enables electrifying control circuit, it is characterised in that the input voltage
Colelctor electrode by being input to photoelectric isolating coupler triode after the first bleeder circuit partial pressure, first bleeder circuit is at least
Including the first resistor and second resistance connected, common point connects the colelctor electrode of photoelectric isolating coupler triode.
3. power module positive logic as claimed in claim 1 enables electrifying control circuit, it is characterised in that the diode electricity
Road includes：
First diode, its positive pole connects the Enable Pin of the power module, its negative pole as the anode of the diode circuit
The emitter stage of the triode of the photoelectric isolating coupler is connected as the negative terminal of the diode circuit；
3rd resistor, its first end connects the negative pole of first diode, and its second end connects the input of the power module
Negative terminal.
4. the power module positive logic as described in any one in claim 1 enables electrifying control circuit, it is characterised in that institute
Stating interval turn-on control circuit includes：
First controllable accurate source of stable pressure, the anode of the monitored power supply of its positive pole connection, its negative pole connects photoelectricity by the 4th resistance
Isolating coupler, and its negative pole connects the negative terminal of monitored power supply by the 5th resistance；First controllable accurate source of stable pressure is turned on, then
The LEDs ON of photoelectric isolating coupler；First controllable accurate source of stable pressure ends, then photoelectric isolating coupler is luminous
Diode ends；
Second bleeder circuit, its two ends are connected between the negative terminal of monitored power supply and anode, described in its point of press bond
The reference edge of the first controllable accurate source of stable pressure；
Second controllable accurate source of stable pressure, the anode of the monitored power supply of its positive pole connection, its negative pole connects second bleeder circuit
Partial pressure end；
3rd bleeder circuit, its two ends are connected between the negative terminal of monitored power supply and anode, described in its point of press bond
The reference edge of the second controllable accurate source of stable pressure；
Wherein, when the monitoring voltage exceedes lower voltage limit and is no more than upper voltage limit, the partial pressure of the 3rd bleeder circuit is not enough
To control the second controllable accurate source of stable pressure to turn on so that the partial pressure of the second bleeder circuit is enough to control the first controllable accurate source of stable pressure
Conducting；When the monitoring voltage exceedes upper voltage limit, the partial pressure of the 3rd bleeder circuit is enough to control the second controllable accurate voltage stabilizing
Source turns on, in current distributing to the second controllable accurate source of stable pressure of the second bleeder circuit so that the first controllable accurate source of stable pressure
Reference voltage terminal is reduced and ended.
5. power module positive logic as claimed in claim 4 enables electrifying control circuit, it is characterised in that second partial pressure
Circuit at least includes the 6th resistance and the 7th resistance of series connection, and the reference edge of common point the first controllable accurate source of stable pressure of connection is simultaneously defeated
Go out its partial pressure；And/or, the 3rd bleeder circuit at least includes the 8th resistance and the 9th resistance of series connection, common point connection the
The reference edge of two controllable accurate source of stable pressure simultaneously exports its partial pressure.
6. the power module positive logic as described in any one in claim 1-5 enables electrifying control circuit, it is characterised in that
The photoelectric isolating coupler of the control unit of next stage, the colelctor electrode of its triode receives input voltage, the transmitting of its triode
The voltage of pole is input into the colelctor electrode of the photoelectric isolating coupler triode of previous stage as input voltage.
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| CN201610996854.9A CN106773639B (en) | 2016-11-10 | 2016-11-10 | Power module positive logic enables electrifying control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379154A (en) * | 2020-10-30 | 2021-02-19 | 中车大连电力牵引研发中心有限公司 | Wide-range voltage signal acquisition circuit based on TL431 |
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| US20100220420A1 (en) * | 2009-02-27 | 2010-09-02 | Ambit Microsystems (Shanghai) Ltd. | Voltage protection circuit |
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| CN103019127A (en) * | 2011-09-23 | 2013-04-03 | 鸿富锦精密工业（深圳）有限公司 | Electrifying control circuit |
| CN103199498A (en) * | 2013-04-07 | 2013-07-10 | 杭州华三通信技术有限公司 | Power supply enabling control circuit |
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| CN112379154A (en) * | 2020-10-30 | 2021-02-19 | 中车大连电力牵引研发中心有限公司 | Wide-range voltage signal acquisition circuit based on TL431 |
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|---|---|
| CN106773639B (en) | 2019-11-19 |
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