CN206517286U - A kind of slope compensation circuit for automatically adjusting slope compensation slope - Google Patents
A kind of slope compensation circuit for automatically adjusting slope compensation slope Download PDFInfo
- Publication number
- CN206517286U CN206517286U CN201720239726.XU CN201720239726U CN206517286U CN 206517286 U CN206517286 U CN 206517286U CN 201720239726 U CN201720239726 U CN 201720239726U CN 206517286 U CN206517286 U CN 206517286U
- Authority
- CN
- China
- Prior art keywords
- slope
- resistance
- circuit
- slope compensation
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
A kind of slope compensation circuit for automatically adjusting slope compensation slope, a kind of technology for following power supply voltage signal to automatically adjust slope compensation slope, can not automatically adjust to solve slope compensation slope and cause the problem of current control mode dutycycle is unstable, transient response slow or loses current control mode characteristic advantage.Circuit occurs for slope of the present utility model, for exporting ramp voltage signal according to voltage sampling signal and PWM drive signal；Adder circuit, the inductive current sampled signal after slope compensation is exported for the ramp voltage signal and inductive current sampled signal of circuit output to occur according to slope.Having the beneficial effect that does not influence the stability of current control mode dutycycle, and transient response is fast, and current control mode will not be made to lose current control mode characteristic advantage.Suitable for the power supply of Peak Current-Mode Controlled Circuit.
Description
Technical field
The utility model is related to a kind of technology for following power supply voltage signal to automatically adjust slope compensation slope.
Background technology
The control model of Power Management Design is broadly divided into current control mode and the major class of voltage mode control two.Due to electric current control
Molding formula has the advantages that dynamic response is fast, bandwidth gain is big, feedback loop design simplifies and during Parallel opertation easily with flowing,
And be widely used.Peak Current-Mode Controlled Circuit is most common form in current control mode, but due in power supply PWM duties
In the case of more than 50%, the Peak Current-Mode Controlled Circuit of fixed frequency can produce it is unstable, accordingly, it would be desirable to introduce slope benefit
Signal is repaid to suppress the generation of subharmonic concussion.It is too small that the intensity of the slope compensation signal is introduced, it is impossible to meets very big duty
The stability of a system than in the case of；It is excessive that the intensity of the slope compensation signal is introduced, and can influence the transient response of Switching Power Supply,
So as to weaken the load capacity of Switching Power Supply；It is excessive that the amplitude of the slope compensation signal is introduced, and can make peak value comparison method mould
Formula loses the advantage of current control mode characteristic to voltage mode control transition；And slope compensation slope is influence slope
The key factor of thermal compensation signal.
Utility model content
The purpose of this utility model is can not to automatically adjust to solve slope compensation slope and cause current control mode
The problem of dutycycle is unstable, transient response is slow or loses current control mode characteristic advantage, it is proposed that one kind can be adjusted automatically
Save the slope compensation circuit of slope compensation slope.
A kind of slope compensation circuit for automatically adjusting slope compensation slope described in the utility model, including slope occur
Circuit and adder circuit；
Circuit occurs for slope, for exporting ramp voltage signal according to voltage sampling signal and PWM drive signal；
Adder circuit, it is defeated for the ramp voltage signal and inductive current sampled signal of circuit output to occur according to slope
The inductive current sampled signal gone out after slope compensation.
Operation principle of the present utility model is：Slope occurs circuit and produced according to voltage sampling signal and PWM drive signal
After ramp voltage signal, the ramp voltage signal is sent to adder circuit, adder circuit is according to the slope electricity received
Pressure signal and inductive current sampled signal are produced and exported after the inductive current sampled signal after slope compensation, the slope compensation
Inductive current sampled signal disclosure satisfy that the setting value of peak point current in Peak Current-Mode Controlled Circuit, complete slope compensation slope
Automatically adjust.
The beneficial effects of the utility model are that the inductive current sampled signal after the slope compensation that the utility model is produced is
Produced according to voltage sampling signal, PWM drive signal and inductive current sampled signal, therefore, the inductance after the slope compensation
Current sampling signal does not interfere with the stability of current control mode dutycycle；It is described in the utility model to automatically adjust slope
The slope compensation circuit of compensation slope does not have any delay circuit, and therefore, transient response is fast；Simultaneously as after the slope compensation
Inductive current sampled signal will not produce any harmful effect to Peak Current-Mode Controlled Circuit, i.e. peak point current control will not be made
Molding formula carries out transition to voltage mode control, therefore, described in the utility model to automatically adjust the oblique of slope compensation slope
Slope compensation circuit will not make current control mode lose current control mode characteristic advantage.
The utility model is applied to the power supply of Peak Current-Mode Controlled Circuit.
Brief description of the drawings
Fig. 1 is a kind of original of slope compensation circuit for automatically adjusting slope compensation slope described in embodiment one
Manage block diagram；
Fig. 2 is each in a kind of slope compensation circuit for automatically adjusting slope compensation slope described in embodiment one
The oscillogram of signaling point；Wherein, waveform a is the oscillogram of PWM drive signal, and waveform b is that the slope that circuit 1 is exported occurs for slope
Waveform voltage signal figure, waveform c is inductive current sampled signal waveform figure, and waveform d is the inductive current sampling after slope compensation
The oscillogram of signal, waveform e is the oscillogram of the preset value of peak point current, and T is the cycle that waveform is converted, and abscissa is the time
(unit is s), ordinate is the amplitude of waveform (unit is mm)；
Fig. 3 is a kind of slope compensation circuit for automatically adjusting slope compensation slope described in embodiment two and four
Circuit diagram.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1 and Fig. 2, one kind described in present embodiment can be automatic
Adjusting the slope compensation circuit of slope compensation slope includes slope generation circuit 1 and adder circuit 2；
Circuit 1 occurs for slope, for exporting ramp voltage signal according to voltage sampling signal and PWM drive signal；Slope
Occur circuit 1 and meet the voltage signal of power supply and slope compensation slope into certain proportional relationship, i.e. slope can be reached
The purpose that compensation slope is automatically adjusted；
Adder circuit 2, for occurring ramp voltage signal and inductive current sampled signal that circuit 1 is exported according to slope
Export the inductive current sampled signal after slope compensation.
In the present embodiment, as shown in Fig. 2 circuit 1 occurs for slope according to voltage sampling signal and as shown in waveform a
PWM drive signal is produced after the ramp voltage signal as shown in waveform b, and the ramp voltage signal is sent into adder circuit,
Adder circuit is to the ramp voltage signal as shown in waveform b and the inductive current sampled signal as shown in waveform c that receive
It is overlapped, and exports the inductance electricity after the inductive current sampled signal after the slope compensation as shown in waveform d, the slope compensation
Stream sampled signal has reached the setting value of the peak point current in Peak Current-Mode Controlled Circuit as shown in waveform e, completes slope compensation
Slope is automatically adjusted.
Embodiment two：Illustrate present embodiment with reference to Fig. 3, present embodiment is to described in embodiment one
A kind of slope compensation circuit for automatically adjusting slope compensation slope further limit, in the present embodiment, the slope
Generation circuit 1 include a resistance R1, No. three resistance R3, No. five resistance R5, No. nine resistance R9, an electric capacity C1 and two input with
Door integrated chip U2A；
One end of a number resistance R1 as voltage sampling signal input Vost；
One end of No. three resistance R3 as PWM drive signal input P；
The other end of a No. three resistance R3 input simultaneously with two inputs with door integrated chip U2A, two inputs
It is connected with door integrated chip U2A No. two inputs and No. nine resistance R9 one end；
The other end of No. nine resistance R9 is connected with two inputs with door integrated chip U2A ground terminal simultaneously with digitally；
Two input is connected with door integrated chip U2A power end with 3.3V voltage output ends；
Two input is connected with door integrated chip U2A output end with No. five resistance R5 one end；
One end of a number electric capacity C1 is with being digitally connected；
The other end and electric capacity C1 other end phase of the other end of a number resistance R1 simultaneously with No. five resistance R5
Even, and as slope occurs the ramp voltage signal output end of circuit 1.
In the present embodiment, two inputs and door integrated chip U2A out-gate circuit are leakage collection open circuit door (OD)；I.e.
When PWM drive signal is high level, high-impedance state is presented with door integrated chip U2A outputs in two input, equivalent to open circuit, voltage
Sampled signal Vost is that an electric capacity C1 charges as power supply；When PWM drive signal is low level, two input is integrated with door
Chip U2A output ends export low level, and equivalent to ground connection, an electric capacity C1 is discharged rapidly；By above-mentioned control, reality is able to
The voltage signal and slope compensation slope of existing power supply are proportional, i.e. reach the purpose that slope compensation slope is automatically adjusted.
Embodiment three：Present embodiment is that slope benefit can be automatically adjusted to one kind described in embodiment two
The slope compensation circuit for repaying slope is further limited, in the present embodiment, two inputs and door integrated chip U2A model
74HC09。
In the present embodiment, using model 74HC09 two input with door integrated chip, the model two input with
Door integrated chip has the advantages that running speed is fast, can effectively prevent from increasing the transient response time of Switching Power Supply；Simultaneously should
Two inputs of model and the pin compatibility of door integrated chip are good, therefore, do not interfere with the stability of current control mode.
Embodiment four：Illustrate present embodiment with reference to Fig. 3, present embodiment is to described in embodiment one
A kind of slope compensation circuit for automatically adjusting slope compensation slope further limit, in the present embodiment, the addition
Device circuit 2 includes No. two resistance R2, No. four resistance R4, No. six resistance R6, No. seven resistance R7, No. eight resistance R8, No. two electric capacity C2
With operational amplifier U1A；
One end of No. two resistance R2 as adder circuit 2 ramp voltage signal input；
One end of No. four resistance R4 is connected with No. six resistance R6 one end and No. two electric capacity C2 one end simultaneously, and makees
For the input CS of inductive current sampled signal；
The other end of No. six resistance R6 and No. two electric capacity C2 other end are simultaneously with being digitally connected；No. six resistance R6
It is amplified with the inductive current sampled signal of the input CS to inductive current sampled signal；
The other end of No. two resistance R2 and No. four resistance R4 other end are simultaneously same mutually defeated with operational amplifier U1A
Enter end to be connected；
The inverting input of one end of No. seven resistance R7 and No. eight resistance R8 one end simultaneously with operational amplifier U1A
It is connected；
The positive power source terminal of the operational amplifier U1A is connected with 3.3V voltage output ends；
The negative power end of the operational amplifier U1A is simultaneously with No. eight resistance R8 other end and being digitally connected；
The output end of the operational amplifier U1A is connected with No. seven resistance R7 other end, and as slope compensation after
Inductive current sampled signal output end CSI.
In the present embodiment, inductive current sampled signal is in the form of voltage after No. six resistance R6 amplifications
It is existing；The ramp voltage signal that the output of circuit 1 occurs for slope is also to be presented in the form of voltage, also, slope generation circuit 1 is defeated
The voltage of the ramp voltage signal gone out changes linearly over time.
Embodiment five：Present embodiment is that slope benefit can be automatically adjusted to one kind described in embodiment four
The slope compensation circuit for repaying slope is further limited, in the present embodiment, operational amplifier U1A model OPA4350.
In the present embodiment, using model OPA4350 operational amplifier, the operational amplifier of the model is a kind of
Single supply rail-to-rail operation amplifier with high-speed computation ability, the operational amplifier of the model is especially suitable for driving inductance electricity
Sampled signal is flowed, the scope of its working power is 2.5V~30V.
Claims (5)
1. a kind of slope compensation circuit for automatically adjusting slope compensation slope, it is characterised in that occur circuit (1) including slope
With adder circuit (2)；
Circuit (1) occurs for slope, for exporting ramp voltage signal according to voltage sampling signal and PWM drive signal；
Adder circuit (2), for occurring ramp voltage signal and inductive current sampled signal that circuit (1) is exported according to slope
Export the inductive current sampled signal after slope compensation.
2. a kind of slope compensation circuit for automatically adjusting slope compensation slope according to claim 1, it is characterised in that
Circuit (1), which occurs, for the slope includes resistance (R1), No. three resistance (R3), No. five resistance (R5), No. nine resistance (R9), one
Number electric capacity (C1) and two inputs and door integrated chip (U2A)；
One end of a number resistance (R1) as voltage sampling signal input (Vost)；
One end of No. three resistance (R3) as PWM drive signal input (P)；
The other end of No. three resistance (R3) input simultaneously with two inputs with door integrated chip (U2A), two inputs
It is connected with No. two No. two inputs of door integrated chip (U2A) and one end of No. nine resistance (R9)；
The other end of No. nine resistance (R9) is connected with two inputs with the ground terminal of door integrated chip (U2A) simultaneously with digitally；
Two input is connected with the power end of door integrated chip (U2A) with 3.3V voltage output ends；
Two input is connected with the output end of door integrated chip (U2A) with one end of No. five resistance (R5)；
One end of a number electric capacity (C1) is with being digitally connected；
The other end and the other end of an electric capacity (C1) of the other end of a number resistance (R1) simultaneously with No. five resistance (R5)
It is connected, and is used as the ramp voltage signal output end of slope generation circuit (1).
3. a kind of slope compensation circuit for automatically adjusting slope compensation slope according to claim 2, it is characterised in that
Two inputs and the model 74HC09 of door integrated chip (U2A).
4. a kind of slope compensation circuit for automatically adjusting slope compensation slope according to claim 1, it is characterised in that
The adder circuit (2) include No. two resistance (R2), No. four resistance (R4), No. six resistance (R6), No. seven resistance (R7), No. eight
Resistance (R8), No. two electric capacity (C2) and operational amplifier (U1A)；
One end of No. two resistance (R2) as adder circuit (2) ramp voltage signal input；
One end of No. four resistance (R4) is connected with one end of No. six resistance (R6) and one end of No. two electric capacity (C2) simultaneously, and
It is used as the input (CS) of inductive current sampled signal；
The other end of No. six resistance (R6) and the other end of No. two electric capacity (C2) are simultaneously with being digitally connected；
The same phase of the other end of No. two resistance (R2) and the other end of No. four resistance (R4) simultaneously with operational amplifier (U1A)
Input is connected；
The anti-phase input of one end of No. seven resistance (R7) and one end of No. eight resistance (R8) simultaneously with operational amplifier (U1A)
End is connected；
The positive power source terminal of the operational amplifier (U1A) is connected with 3.3V voltage output ends；
The negative power end of the operational amplifier (U1A) is simultaneously with the other ends of No. eight resistance (R8) and being digitally connected；
The output end of the operational amplifier (U1A) is connected with the other end of No. seven resistance (R7), and as slope compensation after
Inductive current sampled signal output end (CSI).
5. a kind of slope compensation circuit for automatically adjusting slope compensation slope according to claim 4, it is characterised in that
The model OPA4350 of operational amplifier (U1A).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720239726.XU CN206517286U (en) | 2017-03-13 | 2017-03-13 | A kind of slope compensation circuit for automatically adjusting slope compensation slope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720239726.XU CN206517286U (en) | 2017-03-13 | 2017-03-13 | A kind of slope compensation circuit for automatically adjusting slope compensation slope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206517286U true CN206517286U (en) | 2017-09-22 |
Family
ID=59870532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720239726.XU Active CN206517286U (en) | 2017-03-13 | 2017-03-13 | A kind of slope compensation circuit for automatically adjusting slope compensation slope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206517286U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070178A (en) * | 2017-03-13 | 2017-08-18 | 黑龙江特通电气股份有限公司 | A kind of slope compensation circuit for automatically adjusting slope compensation slope |
-
2017
- 2017-03-13 CN CN201720239726.XU patent/CN206517286U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070178A (en) * | 2017-03-13 | 2017-08-18 | 黑龙江特通电气股份有限公司 | A kind of slope compensation circuit for automatically adjusting slope compensation slope |
| CN107070178B (en) * | 2017-03-13 | 2023-05-12 | 黑龙江特通电气股份有限公司 | Slope compensation circuit capable of automatically adjusting slope compensation slope |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107070178A (en) | A kind of slope compensation circuit for automatically adjusting slope compensation slope | |
| CN110401331A (en) | A kind of SiC power device initiative driving circuit of electric vehicle motor controller | |
| CN206149142U (en) | Piezoelectricity vibration energy collection system based on maximum power point trails | |
| CN209448712U (en) | A kind of high-power linear high frequency amplifier | |
| CN110277921A (en) | A kind of dynamic radio charging system efficiency optimization method | |
| CN206517286U (en) | A kind of slope compensation circuit for automatically adjusting slope compensation slope | |
| CN205901646U (en) | Miniwatt drag cup direct current motor control circuit | |
| CN102931832B (en) | PWM (pulse width modulation) type adjustable RC (resistance-capacitance) circuit and adjustment method thereof | |
| CN102130590A (en) | Proportional valve output compensation circuit and control method | |
| CN204859056U (en) | Slippage motor automatic speed adjustment controlling means | |
| CN201113944Y (en) | High speed switch tube floating grid driver circuit | |
| CN203301375U (en) | Hierarchical thought-based fuzzy PI double loop-controlled direct-current boost circuit | |
| CN206135859U (en) | Pulse width modulation circuit based on TL494 chip | |
| CN205003499U (en) | A analog voltage current output circuit for driving a vehicle converter | |
| CN201493594U (en) | DC-DC inversion-type electrical welding machine | |
| CN202914850U (en) | Modified proportional valve drive return circuit | |
| CN207304417U (en) | A kind of brshless DC motor current loop control system | |
| CN102500874B (en) | Intelligent magnetic biasing detection and processing device for inversion welding power supply | |
| CN103532551B (en) | high speed tri-state ADC | |
| CN202121808U (en) | Induction cooker IGBT driving module current limiting circuit | |
| CN202799086U (en) | Electronic horn driven by constant power | |
| CN102437747B (en) | Digital-type hysteresis control current source | |
| CN206206741U (en) | A kind of adjustable Chopper driving circuit of energy-saving current | |
| CN105471343A (en) | Excitation voltage regulator for claw-pole generator | |
| CN207304507U (en) | Small-signal input square-wave generator based on Schmitt trigger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |