CN105450022A - Difference PWM modulator and current-mode DC-DC converter based on the modulator - Google Patents
Difference PWM modulator and current-mode DC-DC converter based on the modulator Download PDFInfo
- Publication number
- CN105450022A CN105450022A CN201610024224.5A CN201610024224A CN105450022A CN 105450022 A CN105450022 A CN 105450022A CN 201610024224 A CN201610024224 A CN 201610024224A CN 105450022 A CN105450022 A CN 105450022A
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- CN
- China
- Prior art keywords
- nmos tube
- voltage
- differential
- resistance
- com
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
Abstract
The invention discloses a difference PWM modulator and a current-mode DC-DC converter based on the modulator, for solving the problem that a conventional single-end modulator is not suitable for a current-mode DC-DC converter which detects output currents by use of an off-chip resistor. The difference PWM modulator comprises: difference-mode voltages between single-end control voltages and common-mode voltages are amplified through a gain grade A1, difference voltages of feedback currents are amplified through a gain grade A2, after amplification through the gain grade A1 and the gain grade A2, difference signals are input to a comparator for comparison, PWM output is generated, and differences between first feedback voltages CS and second feedback voltages VOUT are the difference voltages of the feedback currents. According to the invention, a detection resistor RS of the current-mode DC-DC converter based on the modulator is arranged in an output path, and peak or valley current-mode PWM is realized by use of the difference voltages on the resistor RS. The difference PWM modulator is suitable for application of a battery charger and the like which need off-chip resistors for detecting output currents.
Description
Technical field
The present invention relates to a kind of PWM device, and based on the DC/DC transducer of this modulator.
Background technology
The DC-DC converter that PWM controller chip is formed in conjunction with discrete switch mosfet, has that current capacity is strong, high reliability.But owing to not having current feedback path, such DCDC many employings voltage-mode controls, and namely only feed back DCDC output voltage, as Fig. 1, its shortcoming is that load regulation is worse than current-mode, and the more complicated compensating network needed for voltage-mode control.
Also resistance R can be added in lower pipe MN source
s, as Fig. 2, introduce current feedback, thus realize current limit or current-mode control.But it only have detected the electric current of a phase place in the PWM cycle, the size of output current accurately can not be reacted.
In the application such as battery charger, output voltage and cell voltage, then output current and charging current, in order to precisely control charging current, must add and detecting resistance R in outgoing route
s, as Fig. 3.Controlling to realize current-mode, if add detection resistance with Fig. 2 is equally extra in MN source, then can worsen conversion efficiency.
According to traditional single-ended modulator, as Fig. 4, that comparator CMP compares is single-ended control voltage V
cTRLwith ramp voltage V
rAMP, and be not suitable for the application of Fig. 3.
Summary of the invention
The object of the invention is not to be suitable for solve traditional single-ended modulator the problem utilizing off chip resistor to detect the DC/DC transducer of output current, the invention provides a kind of differential PWM modulation device and the DC/DC transducer based on this modulator.
Differential PWM modulation device of the present invention, described modulator comprises:
Differential amplifier, for input reference voltage V
rEFand feedback voltage V
oUT, obtain single-ended control voltage V
cTRL;
Gain stage A1, for by single-ended control voltage V
cTRLwith common-mode voltage V
cOMdifferential voltage V
cTRL– V
cOMamplify, obtain differential signal V
a1;
Gain stage A2, for the differential voltage of feedback current being amplified, obtains differential signal V
a2;
Comparator, for by differential signal V
a1with differential signal V
a2produce PWM more afterwards to export.
Described common-mode voltage V
cOM, also for slope compensation.
Described common-mode voltage V
cOMgeneration circuit comprise NMOS tube M
s1, NMOS tube M
s2, electric capacity C
cOMwith current source Icom;
NMOS tube M
s1source electrode and NMOS tube M
s2drain electrode connect, NMOS tube M
s1grid and drain electrode meet current source and electric capacity C simultaneously
cOMone end, electric capacity C
cOMthe other end and NMOS tube M
s2source electrode connect; NMOS tube M
s2grid connect square-wave signal d;
NMOS tube M
s1drain electrode and described electric capacity C
cOMone end between voltage be common-mode voltage V
cOM.
Described gain stage A1 comprises NMOS tube M
a1, NMOS tube M
a2, resistance R
1, resistance R
2with current source I
a1;
NMOS tube M
a1grid input control voltage V
cTRL, NMOS tube M
a2grid common mode input V
cOM;
NMOS tube M
a1source electrode and NMOS tube M
a2source electrode meet current source I simultaneously
a1;
NMOS tube M
a1drain electrode and resistance R
1one end connect, resistance R
1the other end and resistance R
2one end connect, resistance R
2the other end and NMOS tube M
a2drain electrode connect;
NMOS tube M
a2drain electrode output and NMOS tube M
a1drain electrode input to comparator and compare.
Described gain stage A2 comprises nmos pass transistor M
b1, nmos pass transistor M
b2with current source I
a2;
NMOS tube M
b1grid input the first feedback voltage CS, NMOS tube M
b2grid input the second feedback voltage V
oUT; Described first feedback voltage CS and described second feedback voltage V
oUTdifference be the differential voltage of feedback current;
NMOS tube M
b1source electrode and NMOS tube M
b2source electrode meet current source I simultaneously
a2;
NMOS tube M
b2drain electrode output and NMOS tube M
b1drain electrode input to comparator and compare.
Also provide a kind of DC/DC transducer based on described differential PWM modulation device, the detection resistance R of described DC/DC transducer
sbe arranged in outgoing route, utilize resistance R
son differential voltage realize peak value or valley point current mould PWM, described resistance R
son differential voltage be the differential voltage of described feedback current.
Described DC/DC transducer comprises differential PWM modulation device, logic controller, two buffers, not gate, NMOS tube MN, PMOS MP, inductance L, electrochemical capacitor C
oUTwith resistance R
s;
The output of differential PWM modulation device inputs to logic controller, described logic controller exports square-wave signal d, described square-wave signal d is by the first buffer and input to the grid of PMOS MP through not gate, described square-wave signal d inputs to the grid of NMOS tube MN by the second buffer, the drain electrode of described PMOS MP is connected with one end of inductance L with the drain electrode of NMOS tube MN simultaneously, the other end of described inductance L and resistance R
sone end connect, described resistance R
sthe other end and electrochemical capacitor C
oUTpositive pole connect, described electrochemical capacitor C
oUTnegative pole and the source electrode of NMOS tube MN connect power supply ground simultaneously; The source electrode of described PMOS MP meets the positive pole V of power supply
iN.
Beneficial effect of the present invention is, differential PWM modulation device of the present invention is applicable to battery charger etc. needs off chip resistor to detect the application of output current, can namely do output current control by this resistance multiplexing, make again current ripples and detect for PWM; Common-mode voltage V
cOMgeneration circuit extremely simple, achieve common-mode voltage simultaneously and produce and slope compensation function.The existence of gain stage A1 of the present invention and gain stage A2, is convenient to the gain of independent adjustment each road input differential signal, thus regulates the overall gain of PWM device, stability Design is more prone to.V
cTRL– V
cOMdifference mode signal, as control voltage, considerably increases dynamic range, allows to support wider current range under lower operating voltage.
Accompanying drawing explanation
Fig. 1 is the principle schematic of voltage-mode DC-DC converter;
Fig. 2 is the principle schematic of the DC/DC transducer adopting one-terminal current feedback;
Fig. 3 is the principle schematic of the DC/DC transducer described in embodiment;
Fig. 4 is the principle schematic of traditional single-ended modulator;
Fig. 5 is the principle schematic of the differential PWM modulation device described in embodiment;
Fig. 6 is the specific implementation circuit of gain stage A1, gain stage A2 and comparator in Fig. 5;
Fig. 7 is common-mode voltage V in embodiment
cOMgeneration circuit;
Fig. 8 is the oscillogram of square-wave signal d in embodiment;
Fig. 9 is common-mode voltage V in embodiment
cOMoscillogram.
Embodiment
Present embodiment is specially a kind of DC/DC transducer, as shown in Figure 3, comprises differential PWM modulation device, logic controller, two buffers, not gate, NMOS tube MN, PMOS MP, inductance L, electrochemical capacitor C
oUTwith resistance R
s;
The output of differential PWM modulation device inputs to logic controller, logic controller exports square-wave signal d, square-wave signal d is by the first buffer and input to the grid of PMOS MP through not gate, square-wave signal d inputs to the grid of NMOS tube MN by the second buffer, the drain electrode of PMOS MP is connected with one end of inductance L with the drain electrode of NMOS tube MN simultaneously, the other end of inductance L and resistance R
sone end connect, resistance R
sthe other end and electrochemical capacitor C
oUTpositive pole connect, electrochemical capacitor C
oUTnegative pole and the source electrode of NMOS tube MN connect power supply ground simultaneously; The source electrode of PMOS MP meets the positive pole V of power supply
iN.
Wherein, differential PWM modulation device, logic controller and two buffers form PWM controller, precisely control charging current, export fixed voltage.
Present embodiment needs to utilize resistance R
son differential voltage realize peak value or valley point current mould PWM, so adopt differential PWM modulation device as shown in Figure 5, comprising:
Differential amplifier, for input reference voltage V
rEFand feedback voltage V
oUT, obtain single-ended control voltage V
cTRL;
Gain stage A1, for by single-ended control voltage V
cTRLwith common-mode voltage V
cOMdifferential voltage V
cTRL– V
cOMamplify, obtain differential signal V
a1;
Gain stage A2, for the differential voltage of feedback current being amplified, obtains differential signal V
a2;
Comparator CMP, for by differential signal V
a1with differential signal V
a2produce PWM more afterwards to export.
As shown in Figure 6, gain stage A1 comprises NMOS tube M to the specific implementation circuit of gain stage A1, gain stage A2 and comparator CMP
a1, NMOS tube M
a2, resistance R
1, resistance R
2with current source I
a1;
NMOS tube M
a1grid input control voltage V
cTRL, NMOS tube M
a2grid common mode input V
cOM;
NMOS tube M
a1source electrode and NMOS tube M
a2source electrode meet current source I simultaneously
a1;
NMOS tube M
a1drain electrode and resistance R
1one end connect, resistance R
1the other end and resistance R
2one end connect, resistance R
2the other end and NMOS tube M
a2drain electrode connect;
NMOS tube M
a2drain electrode output and NMOS tube M
a1drain electrode input to comparator CMP and compare.
In Fig. 6, gain stage A2 comprises nmos pass transistor M
b1, nmos pass transistor M
b2with current source I
a2;
NMOS tube M
b1grid input the first feedback voltage CS, NMOS tube M
b2grid input the second feedback voltage V
oUT; First feedback voltage CS and the second feedback voltage V
oUTdifference be the differential voltage of feedback current;
NMOS tube M
b1source electrode and NMOS tube M
b2source electrode meet current source I simultaneously
a2;
NMOS tube M
b2drain electrode output and NMOS tube M
b1drain electrode input to comparator CMP and compare.
In Fig. 6, the differential voltage CS – V of kinetic current mould DC-DC converter output current
oUTamplify through gain stage A2, the differential voltage V of reaction controlling voltage
cTRL– V
cOMamplify through gain stage A1, obtain the differential signal V of reaction four road signal
p2– V
n2, through comparator CMP relatively after produce PWM export.
Common-mode voltage V in present embodiment
cOMgeneration circuit as shown in Figure 7, specifically comprise: NMOS tube M
s1, NMOS tube M
s2, electric capacity C
cOMwith current source Icom;
NMOS tube M
s1source electrode and NMOS tube M
s2drain electrode connect, NMOS tube M
s1grid and drain electrode meet current source Icom and electric capacity C simultaneously
cOMone end, electric capacity C
cOMthe other end and NMOS tube M
s2source electrode connect; NMOS tube M
s2grid connect square-wave signal d;
NMOS tube M
s1drain electrode and described electric capacity C
cOMone end between voltage be common-mode voltage V
cOM.
In present embodiment, the grid that current source connects NMOS tube is for it provides bias current;
Wherein, as shown in Figure 8, this square-wave signal is identical with the square-wave signal d in Fig. 3 for the oscillogram of square-wave signal d;
Common-mode voltage V
cOMwaveform as Fig. 9, on the one hand it is control voltage V
cTRLthere is provided a reference voltage, on the other hand, by square-wave signal d and electric capacity C
cOMcooperation realize slope compensation, guarantee the steady operation of peak value or valley point current mould DCDC.
In the present embodiment, variant embodiment all can be separated or combinationally use.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (7)
1. differential PWM modulation device, is characterized in that, described modulator comprises:
Differential amplifier, for input reference voltage V
rEFand feedback voltage V
oUT, obtain single-ended control voltage V
cTRL;
Gain stage A1, for by single-ended control voltage V
cTRLwith common-mode voltage V
cOMdifferential voltage V
cTRL– V
cOMamplify, obtain differential signal V
a1;
Gain stage A2, for the differential voltage of feedback current being amplified, obtains differential signal V
a2;
Comparator, for by differential signal V
a1with differential signal V
a2produce PWM more afterwards to export.
2. differential PWM modulation device according to claim 1, is characterized in that, described common-mode voltage V
cOM, also for slope compensation.
3. differential PWM modulation device according to claim 2, is characterized in that, described common-mode voltage V
cOMgeneration circuit comprise NMOS tube M
s1, NMOS tube M
s2, electric capacity C
cOMwith current source Icom;
NMOS tube M
s1source electrode and NMOS tube M
s2drain electrode connect, NMOS tube M
s1grid and drain electrode meet current source Icom and electric capacity C simultaneously
cOMone end, electric capacity C
cOMthe other end and NMOS tube M
s2source electrode connect; NMOS tube M
s2grid connect square-wave signal d;
NMOS tube M
s1drain electrode and described electric capacity C
cOMone end between voltage be common-mode voltage V
cOM.
4. the differential PWM modulation device according to claim 1 or 3, is characterized in that, described gain stage A1 comprises NMOS tube M
a1, NMOS tube M
a2, resistance R
1, resistance R
2with current source I
a1;
NMOS tube M
a1grid input control voltage V
cTRL, NMOS tube M
a2grid common mode input V
cOM;
NMOS tube M
a1source electrode and NMOS tube M
a2source electrode meet current source I simultaneously
a1;
NMOS tube M
a1drain electrode and resistance R
1one end connect, resistance R
1the other end and resistance R
2one end connect, resistance R
2the other end and NMOS tube M
a2drain electrode connect;
NMOS tube M
a2drain electrode output and NMOS tube M
a1drain electrode input to comparator and compare.
5. differential PWM modulation device according to claim 4, is characterized in that, described gain stage A2 comprises nmos pass transistor M
b1, nmos pass transistor M
b2with current source I
a2;
NMOS tube M
b1grid input the first feedback voltage CS, NMOS tube M
b2grid input the second feedback voltage V
oUT; Described first feedback voltage CS and described second feedback voltage V
oUTdifference be the differential voltage of feedback current;
NMOS tube M
b1source electrode and NMOS tube M
b2source electrode meet current source I simultaneously
a2;
NMOS tube M
b2drain electrode output and NMOS tube M
b1drain electrode input to comparator and compare.
6. based on the DC/DC transducer of the differential PWM modulation device described in claim 1 or 5, it is characterized in that, the detection resistance R of described DC/DC transducer
sbe arranged in outgoing route, utilize resistance R
son differential voltage realize peak value or valley point current mould PWM, described resistance R
son differential voltage be the differential voltage of described feedback current.
7. the DC/DC transducer based on differential PWM modulation device according to claim 6, it is characterized in that, described DC/DC transducer comprises differential PWM modulation device, logic controller, two buffers, not gate, NMOS tube MN, PMOS MP, inductance L, electrochemical capacitor C
oUTwith resistance R
s;
The output of differential PWM modulation device inputs to logic controller, described logic controller exports square-wave signal d, described square-wave signal d is by the first buffer and input to the grid of PMOS MP through not gate, described square-wave signal d inputs to the grid of NMOS tube MN by the second buffer, the drain electrode of described PMOS MP is connected with one end of inductance L with the drain electrode of NMOS tube MN simultaneously, the other end of described inductance L and resistance R
sone end connect, described resistance R
sthe other end and electrochemical capacitor C
oUTpositive pole connect, described electrochemical capacitor C
oUTnegative pole and the source electrode of NMOS tube MN connect power supply ground simultaneously; The source electrode of described PMOS MP meets the positive pole V of power supply
iN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610024224.5A CN105450022A (en) | 2016-01-15 | 2016-01-15 | Difference PWM modulator and current-mode DC-DC converter based on the modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610024224.5A CN105450022A (en) | 2016-01-15 | 2016-01-15 | Difference PWM modulator and current-mode DC-DC converter based on the modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105450022A true CN105450022A (en) | 2016-03-30 |
Family
ID=55559906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610024224.5A Pending CN105450022A (en) | 2016-01-15 | 2016-01-15 | Difference PWM modulator and current-mode DC-DC converter based on the modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105450022A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707210A (en) * | 2017-11-27 | 2018-02-16 | 中山路得斯空调有限公司 | A kind of zeroing high-gain differential amplifier circuit certainly |
| CN112953217A (en) * | 2018-12-10 | 2021-06-11 | 联发科技（新加坡）私人有限公司 | DC-DC converter |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06180332A (en) * | 1992-12-14 | 1994-06-28 | Nec Kansai Ltd | Current detection circuit |
| CN1790886A (en) * | 2004-11-30 | 2006-06-21 | 株式会社瑞萨科技 | Semiconductor integrated circuit for controlling power supply, an electronic component and a power supply device |
| CN101789694A (en) * | 2010-03-02 | 2010-07-28 | 杭州矽力杰半导体技术有限公司 | Power governor and control method thereof |
| CN102570807A (en) * | 2010-11-22 | 2012-07-11 | 罗姆股份有限公司 | Current mode synchronous rectification DC/DC converter |
| CN102820781A (en) * | 2012-08-30 | 2012-12-12 | 东南大学 | Single-inductance double-output switch power supply based on ripple control |
| CN102882372A (en) * | 2011-07-11 | 2013-01-16 | 凌力尔特公司 | Switching power supply having separate AC and DC current sensing paths |
| CN203504410U (en) * | 2012-11-16 | 2014-03-26 | 力智电子股份有限公司 | DC-DC converter |
| CN104638885A (en) * | 2014-12-30 | 2015-05-20 | 上海英联电子系统有限公司 | Dynamic load fast response circuit |
| CN205356145U (en) * | 2016-01-15 | 2016-06-29 | 上海铄梵电子科技有限公司 | Difference PWM modulator and because electric current mould DCDC converter of this modulator |
-
2016
- 2016-01-15 CN CN201610024224.5A patent/CN105450022A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06180332A (en) * | 1992-12-14 | 1994-06-28 | Nec Kansai Ltd | Current detection circuit |
| CN1790886A (en) * | 2004-11-30 | 2006-06-21 | 株式会社瑞萨科技 | Semiconductor integrated circuit for controlling power supply, an electronic component and a power supply device |
| CN101789694A (en) * | 2010-03-02 | 2010-07-28 | 杭州矽力杰半导体技术有限公司 | Power governor and control method thereof |
| CN102570807A (en) * | 2010-11-22 | 2012-07-11 | 罗姆股份有限公司 | Current mode synchronous rectification DC/DC converter |
| CN102882372A (en) * | 2011-07-11 | 2013-01-16 | 凌力尔特公司 | Switching power supply having separate AC and DC current sensing paths |
| CN102820781A (en) * | 2012-08-30 | 2012-12-12 | 东南大学 | Single-inductance double-output switch power supply based on ripple control |
| CN203504410U (en) * | 2012-11-16 | 2014-03-26 | 力智电子股份有限公司 | DC-DC converter |
| CN104638885A (en) * | 2014-12-30 | 2015-05-20 | 上海英联电子系统有限公司 | Dynamic load fast response circuit |
| CN205356145U (en) * | 2016-01-15 | 2016-06-29 | 上海铄梵电子科技有限公司 | Difference PWM modulator and because electric current mould DCDC converter of this modulator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707210A (en) * | 2017-11-27 | 2018-02-16 | 中山路得斯空调有限公司 | A kind of zeroing high-gain differential amplifier circuit certainly |
| CN107707210B (en) * | 2017-11-27 | 2023-11-17 | 广东路得斯环境科技有限公司 | Self-zeroing high-gain differential amplifying circuit |
| CN112953217A (en) * | 2018-12-10 | 2021-06-11 | 联发科技（新加坡）私人有限公司 | DC-DC converter |
| CN112953217B (en) * | 2018-12-10 | 2024-03-15 | 联发科技（新加坡）私人有限公司 | DC-DC converter |
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Application publication date: 20160330 |