CN106550518A - Ripple suppressor - Google Patents
Ripple suppressor Download PDFInfo
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- CN106550518A CN106550518A CN201510601584.2A CN201510601584A CN106550518A CN 106550518 A CN106550518 A CN 106550518A CN 201510601584 A CN201510601584 A CN 201510601584A CN 106550518 A CN106550518 A CN 106550518A
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- signal
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- ripple
- grid voltage
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Abstract
A kind of ripple suppressor, produces circuit and feedback control circuit comprising power transistor, current sense resistor, operational amplifier, control signal.The power transistor has drain electrode, source electrode and grid.One grid voltage of the grid can control the drain-source current for flowing through the drain electrode and the source electrode.The current sense resistor is connected between the source electrode and a ground wire, to provide a current detection signal.The operational amplifier, with two inputs, receives the current detection signal and a stability contorting signal respectively.The operational amplifier controls the grid, makes the current detection signal be approximately equal to the stability contorting signal.The control signal produces circuit and is connected to the drain electrode, provides LPF to a drain voltage of the drain electrode, to produce the stability contorting signal.The feedback control circuit is connected to the control signal and produces circuit, and to detect the grid voltage, producing circuit by the control signal affects the stability contorting signal so that the grid voltage to meet one pre-conditioned.
Description
Technical field
The present invention relates to one suppresses the device of current ripple, can espespecially prevent the transistor of driving current from entering
Enter the ripple suppressor (ripple suppressor) of linear zone.
Background technology
Because high-luminous-efficiency and low electric energy loss, light emitting diode (light emitting diode, LED)
Widely application comes as lighting source.In prior art, the drive circuit of LED simply uses list
Capability correction (power factor correction, the PFC) electric pressure converter of one one-level, drives LED.
But, single level PFC electric pressure converter often produces very high output ripple (output ripple).It is a kind of
The method for reducing this ripple, is to hang up a very big output capacitance of capacitance in output end, and which is often
It is exactly an electrochemical capacitor (electrolyte capacitor).Such as known to those skilled in the art, electrolysis
Electric capacity is bulky, short life, so also significantly shortening the life-span of the drive circuit of whole LED.
In order to suppress without as output capacitance, proposing ripple using electrochemical capacitor in prior art
Device, stably to flow through the electric current of LED.Fig. 1 is LED power system 10 of the prior art, is wrapped
Containing a bridge rectifier 12,14, one light emitting diode of a step-down controller (buck converter)
(LED) 16, and a ripple suppressor 18, mutual connection is as shown in Figure 1.Step-down controller (buck
Converter) 14 can be used as a PFC devices, it is possible to provide stable average output current.Fig. 2A, 2B
Ripple suppressor 18a and 18b of the prior art are shown respectively.There is drive in each ripple suppressor
The nmos pass transistor (Mna, Mnb) of dynamic LED, the grid voltage on its grid is about will drain electrode electricity
The stabilization result produced after forcing down pass filter.Using stable grid voltage, NMOS crystal is made
Drain-source current IDS produced by pipe is about definite value, reaches the purpose of current ripple suppression.
The content of the invention
Embodiment discloses a kind of ripple suppressor, include a power transistor, a current sense resistor,
One operational amplifier, a control signal produce circuit and a feedback control circuit.The power transistor,
With a drain electrode, a source electrode and a grid.One grid voltage of the grid is controllable flow through the drain electrode with
One drain-source current of the source electrode.The current sense resistor is connected between the source electrode and a ground wire, to
One current detection signal is provided.The operational amplifier, with two inputs, receives the electric current respectively and examines
Survey signal and a stability contorting signal.The operational amplifier controls the grid, makes the current detection signal big
It is approximately equal to the stability contorting signal.The control signal produces circuit and is connected to the drain electrode, to the drain electrode
Drain voltage provides LPF, to produce the stability contorting signal.The feedback control circuit is connected to this
Control signal produces circuit, and to detect the grid voltage, producing circuit by the control signal affects to be somebody's turn to do
Stability contorting signal so that the grid voltage to meet one pre-conditioned.
Description of the drawings
Fig. 1 is LED power system of the prior art.
Fig. 2A, 2B show ripple suppressor of the prior art respectively.
Fig. 3 shows another ripple suppressor.
Fig. 4 shows that ripple suppressor 18 in FIG adopts the ripple suppressor 18d in Fig. 3
When, output voltage VOUT, drain voltage VDAnd grid voltage VGWaveform.
Fig. 5 shows the ripple suppressor implemented according to the present invention.
Fig. 6 shows grid voltage VGWaveform.
Fig. 7 shows the ripple suppressor implemented according to the present invention.
Fig. 8 A, 8B show the two ripple suppressors implemented according to the present invention.
Fig. 9 A-9C show three ripple suppressors.
Reference numeral explanation
10 LED power systems
12 bridge rectifiers
14 step-down controllers
16 light emitting diodes
18、18a、18b、18d、18e、18f、18g、18k、18m、18n
Ripple suppressor
22 low pass filters
24 dividers
26 Given current controller devices
28 trsanscondutors
29 shadow regions
30 feedback control circuits
32 remove number controller
34th, 35,36 comparator
40 peak detectors
42 valley detection devices
43 feedback control circuits
44 electric capacity
45 trsanscondutors
62 off-centre circuits
CF filter capacitors
IDSDrain-source current
Mna、Mnb、Mnd、Mne、Mnf、Mng、Mnh、Mnk、Mnm、Mnn
Nmos pass transistor
N divisors
OP1 operational amplifiers
RDSConducting resistance
Rf resistance
Rs current sense resistors
VAVGAverage voltage
VDDrain voltage
VDSDrain-source voltage
VGGrid voltage
VG-PEAKCrest
VG-VLYTrough
VOSOffset voltage
VOUTOutput voltage
VSCurrent detection signal
VSETCurrent settings voltage
VTARPreset value
VTH-HH、VTH-HL、VTH-LPreset value
Specific embodiment
In this manual, have some identical symbols, its represent with identical or similar structure,
The element of function, principle, and can deduce according to the teaching of this specification for those skilled in the art.
Succinct degree for specification is considered, and the element of identical symbol no longer will be repeated.
Ripple suppressor 18a and 18b in Fig. 2A, 2B, which suppresses the effect of ripple to be dependent on NMOS
When transistor (Mna, Mnb) operates in saturation state, its drain-source current IDSTo drain-source voltage VDSPhase
Guan Xing.Preferable nmos pass transistor, when saturated, drain-source current IDSIt is with drain-source voltage VDSNothing
Close.Simply, closer to preferable nmos pass transistor, cost is certainly also higher.
Fig. 3 shows another ripple suppressor 18d, its include resistance Rf, low pass filter 22,
Divider 24, and Given current controller device 26, wherein resistance Rf not necessarily elements, visual applicable cases
Increase and decrease, identical situation are also identical in the embodiment of following figure, repeat no more.Ripple suppressor 18d
In nmos pass transistor Mnd, its drain-source current IDSTo drain-source voltage VDSCorrelation, substantially not
The effect that ripple can be affected to suppress.Low pass filter 22 include trsanscondutor (transconductor) 28 with
Filter capacitor CF.Low pass filter 22 is about to drain voltage VDLPF, in filter capacitor CF
Upper generation average voltage VAVG, as a filtered signal.Divider 24 pairs is with average voltage VAVG
Divided by a divisor N, a stability contorting signal, that is, current settings voltage V are producedSET.LPF
Device 22 can be considered as a control signal together with divider 24 and produce circuit, for producing current settings electricity
Pressure VSETSuch a stability contorting signal.Given current controller device 26 includes nmos pass transistor
Mnd, operational amplifier OP1 and current sense resistor Rs.Operational amplifier OP1 produces grid electricity
Pressure VG, control the grid of nmos pass transistor Mnd.Two inputs of operational amplifier OP1 point
Jie Shou not current settings voltage VSETWith current detection signal VS.It is negative anti-that Given current controller device 26 provides one
Feedback control, it is intended that current detection signal VSEqual to current settings voltage VSET.Work as nmos pass transistor
When Mnd operates in saturation mode, drain-source current IDSBig appointment is stably equal to certain electric current, and its value is
Current settings voltage VSETDivided by the resistance value of detection resistance Rs, nmos pass transistor Mnd can't be received
Drain-source current IDSTo drain-source voltage VDSCorrelation affected.
When Fig. 4 shows ripple suppressor 18 in FIG using ripple suppressor 18d in Fig. 3,
Output voltage VOUT, drain voltage VDAnd grid voltage VGWaveform.When the output electricity in Fig. 1
When holding COUT reductions, output voltage VOUT, drain voltage VDAnd grid voltage VGWaveform meeting
Left side from Fig. 4, becomes right-hand part.Because output capacitance COUT is reduced, output voltage
VOUTExcursion is increased up and down.The right-hand part of Fig. 4 also show shadow region 29, wherein drain electrode electricity
Pressure VDIt is too low, cause the nmos pass transistor Mnd of Given current controller device 26 to leave saturation mould
Formula and enter linear model, it is impossible to certain electric current is provided.Operation is at shadow region 29, it is meant that LED 16
Brightness is dimmed.In other words, the right-hand part of Fig. 4 implies the problem (flickering) of flicker.
Fig. 5 shows the ripple suppressor 18e implemented according to the present invention.With the ripple suppressor 18d of Fig. 3
Different, ripple suppressor 18e increases a feedback control circuit 30.Feedback control circuit 30 is detected
Grid voltage VG, by controlling the divisor N in divider 24, affect current settings voltage VSET,
So that grid voltage VGMeet one pre-conditioned.In Figure 5, it is grid voltage V that this is pre-conditionedG
Crest VG-PEAKBetween preset value VTH-HHWith VTH-HLBetween, and grid voltage VGTrough VG-VLY
Preset value V is not less than substantiallyTH-L, as shown in Figure 6.For example, preset value VTH-HH、VTH-HL
With VTH-L, it is 10V, 8V and 3V respectively.
Feedback control circuit 30 includes peak detector 40 and valley detection device 42, all for detecting
Grid voltage VG, crest V is produced respectivelyG-PEAKWith trough VG-VLY.As crest VG-PEAKHigher than pre-
If value VTH-HHWhen, comparator 36 makes to increase the divisor N of divider 24 except number controller 32, thus
Reduce current settings voltage VSET.The current settings voltage V of reductionSETThe crest of next time can be made
VG-PEAKDiminish.For example, except number controller 32 may increase removing for divider 24 every 50ms
Count N once, until crest VG-PEAKLess than preset value VTH-HHTill.As crest VG-PEAKIt is less than
Preset value VTH-HLWhen, comparator 35 makes to reduce the divisor N of divider 24 except number controller 32, makes
The crest V of next timeG-PEAKBecome big.As trough VG-VALLEYLess than preset value VTH-LWhen, comparator 34
Make the divisor N of divider 24 to be reduced except number controller 32, thus increased current settings voltage VSET,
Make the trough V of next timeG-VLYBecome big.In one embodiment, the divisor N of divider 24 is every 50ms
Just it is updated once (may increase or reduce).
Therefore, as time go by, feedback control circuit 30 can control crest VG-PEAKRange approximately from
Preset value VTH-HHWith VTH-HLBetween, and trough VG-VLYPreset value V is not less than substantiallyTH-L.Ripple
Peak VG-PEAKIt is limited in about preset value VTH-H1With VTH-H2Between, there are two benefits.For example,
If grid voltage VGMore than preset value VTH-HHWhen, nmos pass transistor Mne may operate in line
Sexual norm, that feedback control circuit 30 can prevent nmos pass transistor Mne to leave saturation mode.Separately
On the one hand, crest VG-PEAKMaintain and be not less than preset value VTH-HL, nmos pass transistor can be enjoyed
Mne has relatively low conducting resistance RDS, the electric energy consumed by ripple suppressor 18e is reduced, that is, is increased
Enter efficiency.Similar, trough VG-VLYPreset value V is not less than substantiallyTH-L, and avoid NMOS brilliant
Body pipe Mne has too high conducting resistance RDS, ripple suppressor 18e can be avoided to consume excessive electric energy,
Improve efficiency.
In Figure 5, producing current settings voltage VSETProcess on, divider 24 is followed in low pass filtered
After ripple device 22, but the invention is not restricted to this.Fig. 7 shows the ripple suppression implemented according to the present invention
Device 18f processed, wherein low pass filter 22 are followed after divider 24, and are removed number controller 32 and controlled
The divisor N of divider 24.Ripple suppressor 18f can enjoy the ripple suppressor 18e mono- with Fig. 5
The result and benefit of sample.
Fig. 8 A show the ripple suppressor 18g implemented according to the present invention.Ripple suppressor 18g also has
One feedback control circuit 43, its detection grid voltage VG, by controlling the divisor N in divider 24,
To affect current settings voltage VSET, so that grid voltage VGMeet one pre-conditioned.In this embodiment
In, it is grid voltage V that this is pre-conditionedGMean value be approximately equal to a preset value VTAR(=6V).
Feedback control circuit 40 is substantially an average circuit, includes a trsanscondutor 45 and an electric capacity 44.
Trsanscondutor 45 compares grid voltage VGWith preset value VTAR, according to the difference between them, produce output
Electric current, to 44 discharge and recharge of electric capacity.Voltage on electric capacity 44 can be controlled to remove as an output signal
Divisor N in musical instruments used in a Buddhist or Taoist mass 24.
For example, as grid voltage VGMean value be more than preset value VTARWhen, the electricity of electric capacity 44
Pressure can rise, and divisor N can decline once every 50ms, therefore downgrade current settings voltage VSET, mat
This drags down grid voltage VGMean value.Vice versa.So, feedback control circuit 40 can make grid
Pole tension VGMean value be approximately equal to preset value VTAR.Such result, grid voltage VGIt is unlikely
Make nmos pass transistor Mng fail in too high, be also unlikely to too low and make nmos pass transistor Mng
Excessive electric energy is lost.
In fig. 8 a, producing current settings voltage VSETProcess on, divider 24 is followed in low pass
After wave filter 22, but the invention is not restricted to this.Fig. 8 B show the ripple implemented according to the present invention
Suppressor 18h, wherein low pass filter 22 are followed after divider 24, and feedback control circuit 40
Control the divisor N of divider 24.
In Fig. 5,7,8A and 8B, each feedback control circuit is the divisor for controlling a divider,
But the invention is not restricted to this.Fig. 9 A-9C show three ripples suppressor 18k, 18m, 18n, wherein,
What feedback control circuit 43 was controlled is the offset voltage provided by an off-centre circuit.With the ripple of Fig. 9 A
As a example by suppressor 18k, off-centre circuit 62 is connected between divider 24 and Given current controller device 26,
For providing an offset voltage VOS.As grid voltage V in ripple suppressor 18kGMean value be more than
Preset value VTARWhen, offset voltage VOSCan lentamente decline, therefore downgrade current settings voltage VSET,
Grid voltage V is dragged down therebyGMean value.Vice versa.So, ripple suppressor 18k can make
Grid voltage VGMean value be approximately equal to preset value VTAR。
In Fig. 9 B, off-centre circuit 62 is connected between low pass filter 22 and divider 24.Fig. 9 C
In, off-centre circuit 62 is connected between resistance Rf and low pass filter 22.Explanation by more than can
Know, the ripple suppressor 18m in Fig. 9 B and 9C and 18n can also make grid voltage VGMean value
Approximately equal to preset value VTAR。
Similar, in other examples, the feedback control circuit 43 in Fig. 9 A, 9B and 9C
Can also be replaced with the feedback control circuit 30 in Fig. 5.
In an embodiment of the present invention, feedback control circuit can be used to detect grid voltage VG, according to this
Adjustment current settings voltage VSET, so that grid voltage VGMeet one pre-conditioned, NMOS can be made
Transistor does not fail or the comparison for operating is efficient.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to the claims in the present invention
Change and modification, should all belong to the covering scope of the present invention.
Claims (13)
1. a kind of ripple suppressor, includes：
One power transistor, with a drain electrode, a source electrode and a grid, a grid voltage of the grid
The controllable drain-source current for flowing through the drain electrode and the source electrode；
One current sense resistor, is connected between the source electrode and a ground wire, to provide a current detecting
Signal；
One operational amplifier, with two inputs, receives the current detection signal and a stable control respectively
Signal processed, the operational amplifier control the grid, make the current detection signal be approximately equal to the stability contorting
Signal；
One control signal produces circuit, is connected to the drain electrode, provides low pass to a drain voltage of the drain electrode
Filtering, to produce the stability contorting signal；And
One feedback control circuit, is connected to the control signal and produces circuit, to detect the grid voltage,
Circuit is produced by the control signal affects the stability contorting signal, so as to the grid voltage meets one preset
Condition.
2. ripple suppressor according to claim 1, wherein, the control signal produces circuit bag
Contain：
One low pass filter, by the drain voltage LPF, produces a filtered signal；And
One divider, by the filtered signal divided by a divisor, to produce the stability contorting signal；
Wherein, the feedback control circuit controls the divisor.
3. ripple suppressor according to claim 1, wherein, the control signal produces circuit bag
Contain：
One divider, by the drain voltage divided by a divisor, to produce a M signal；And
One low pass filter, by the M signal LPF, produces the stability contorting signal；
Wherein, the feedback control circuit controls the divisor.
4. ripple suppressor according to claim 1, wherein, the control signal produces circuit bag
Contain：
One off-centre circuit, to provide an offset voltage；
Wherein, the feedback control circuit controls the offset voltage.
5. ripple suppressor according to claim 4, wherein, the control signal produces circuit also
Include a low pass filter, be connected to the operational amplifier, the off-centre circuit is connected to the LPF
Between device and the drain electrode.
6. ripple suppressor according to claim 4, wherein, the control signal produces circuit also
Include a low pass filter, be connected to the drain electrode, the off-centre circuit is connected to the low pass filter and is somebody's turn to do
Between operational amplifier.
7. ripple suppressor according to claim 1, wherein, the feedback control circuit was by should
Control signal produces circuit affects the stability contorting signal, so as to the grid voltage is about limited to one preset
Below higher limit.
8. ripple suppressor according to claim 7, wherein, the feedback control circuit includes：
One first comparator, to compare the grid voltage and the preset upper limit value；
Wherein, when the grid voltage is more than the preset upper limit value, the feedback control circuit can make this stable
Control signal is reduced.
9. ripple suppressor according to claim 8, wherein, the feedback control circuit is also included
Have：
One second comparator, to compare the grid voltage and a preset lower limit value；
Wherein, when the grid voltage is less than the preset upper limit value, the feedback control circuit can make this stable
Control signal increases.
10. ripple suppressor according to claim 1, wherein, the feedback control circuit leads to
Crossing control signal generation circuit affects the stability contorting signal, so that a mean value of the grid voltage is big
It is approximately equal to a preset value.
11. ripple suppressors according to claim 10, wherein, the feedback control circuit bag
Containing an average circuit, according to the difference between the grid voltage and the preset value, there is provided one outputs signal to
The control signal produces circuit.
12. ripple suppressors according to claim 11, wherein, the average circuit includes
One trsanscondutor and an electric capacity, the trsanscondutor compare grid voltage and the preset value, to produce output electricity
Stream is to the capacitor charge and discharge.
13. ripple suppressors according to claim 11, wherein, the control signal produces electricity
Road includes a divider, and the average circuit controls a divisor of the divider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510601584.2A CN106550518B (en) | 2015-09-21 | 2015-09-21 | Ripple suppressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510601584.2A CN106550518B (en) | 2015-09-21 | 2015-09-21 | Ripple suppressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106550518A true CN106550518A (en) | 2017-03-29 |
| CN106550518B CN106550518B (en) | 2019-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510601584.2A Active CN106550518B (en) | 2015-09-21 | 2015-09-21 | Ripple suppressor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665385A (en) * | 2020-06-05 | 2020-09-15 | 河南华兴通信技术有限公司 | Communication base station safety monitoring device |
| CN111712988A (en) * | 2018-03-30 | 2020-09-25 | 三洋电机株式会社 | Battery pack and charging control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013051776A (en) * | 2011-08-30 | 2013-03-14 | Ricoh Co Ltd | Dc-dc converter circuit |
| CN103631299A (en) * | 2013-05-21 | 2014-03-12 | 中国科学院电子学研究所 | Constant-differential-pressure and variable-output-voltage low dropout regulator |
| CN104093253A (en) * | 2014-07-16 | 2014-10-08 | 浙江大学 | Non-strobe isolated LED constant-current driving circuit |
-
2015
- 2015-09-21 CN CN201510601584.2A patent/CN106550518B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013051776A (en) * | 2011-08-30 | 2013-03-14 | Ricoh Co Ltd | Dc-dc converter circuit |
| CN103631299A (en) * | 2013-05-21 | 2014-03-12 | 中国科学院电子学研究所 | Constant-differential-pressure and variable-output-voltage low dropout regulator |
| CN104093253A (en) * | 2014-07-16 | 2014-10-08 | 浙江大学 | Non-strobe isolated LED constant-current driving circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111712988A (en) * | 2018-03-30 | 2020-09-25 | 三洋电机株式会社 | Battery pack and charging control method thereof |
| CN111712988B (en) * | 2018-03-30 | 2024-04-16 | 松下新能源株式会社 | Battery pack and charging control method thereof |
| CN111665385A (en) * | 2020-06-05 | 2020-09-15 | 河南华兴通信技术有限公司 | Communication base station safety monitoring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106550518B (en) | 2019-08-30 |
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