CN104124948B - Pulse width modulating circuit - Google Patents
Pulse width modulating circuit Download PDFInfo
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- CN104124948B CN104124948B CN201410312471.6A CN201410312471A CN104124948B CN 104124948 B CN104124948 B CN 104124948B CN 201410312471 A CN201410312471 A CN 201410312471A CN 104124948 B CN104124948 B CN 104124948B
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- pulse width
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- triode
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Abstract
The invention relates to a pulse width modulating circuit. The pulse width modulating circuit is characterized in that pins E1, E2 and GND are grounded simultaneously, pins C1 and C2 are connected to a power source by use of a resistor R4 and a resistor R5, respectively, an input pin +IN1 is connected to a feedback resistor R10 which is also ground, a comparison pin -IN1 is simultaneously connected with a pin COUT and a pin 5VREF thereof, an output pin PWN is connected with a DTIME pin thereof, the output of the pin C1 is simultaneously connected to the gate of Q4 and the base of Q5, the output of the pin C2 is simultaneously connected to the gate of Q1 and the base of Q6, the emitter of Q6 is connected with the emitter of Q5 and also grounded, the collector of Q5 is connected with the gate of Q3, the collector of Q6 is connected with the gate of Q2, the source of Q1 is connected with the source of Q4 and simultaneously connected with the input pin +IN1, the source of Q3 is connected with the drain of Q4 before outputting, the drain of Q1 is connected with the source of Q2 before outputting, and the drain of Q2 is connected with the drain of Q3 and simultaneously connected to the power source.
Description
Technical field:
The present invention relates to a kind of circuit and in particular to a kind of by adjusting pulsewidth so that regulating load output pulse-width adjustment
Circuit.
Background technology:
The way of output of pulse width modulation, has widely been used in the consumption kind of many, has particularly applied very much
In portable electronic product.In the portable product originated as energy using battery, power consumption is always most important
One of Consideration, the advantage that the way of output of pulsewidth modulation is maximum is exactly its high power efficiency.
Content of the invention:
The present invention is exactly to provide a kind of pulse width regulating circuit.
Present invention provide the technical scheme that
Pulse width regulating circuit, including pulse width modulation controlled integrated circuit, FET and triode, pulse width modulation controlled collection
The power pins becoming circuit connect power supply, and e1, e2, gnd pin of pulse width modulation controlled integrated circuit is grounded simultaneously, pulsewidth modulation
The c1 controlling integrated circuit connects power supply by resistance r5, and c2 pin connects power supply, described pulse width modulation controlled by resistance r4
Input pin+the in1 of integrated circuit connects feedback resistance r10, and resistance r10 is grounded simultaneously, pulse width modulation controlled integrated circuit
Relatively pin-in1 is simultaneously connected with its cout pin, 5v ref pin；And the output pin of pulse width modulation controlled integrated circuit
Pwn is connected with its time controlling switch dtime pin；With FET q4's after the c1 output of pulse width modulation controlled integrated circuit
The base stage of grid and triode q5 is simultaneously connected with, the grid with FET q1 after the c2 output of pulse width modulation controlled integrated circuit
It is simultaneously connected with the base stage of triode q6, the emitter stage of triode q6 is connected with triode q5 emitter stage and is grounded, three simultaneously
Pole pipe q5 colelctor electrode is connected with the grid of FET q3, and the colelctor electrode of triode q6 is connected with the grid of FET q2
Connect, the source electrode of FET q1 is connected with the source electrode of FET q4 and the input with pulse width modulation controlled integrated circuit simultaneously
Pin+in1 connects, and the source electrode of FET q3 is exported after being connected with the drain electrode of FET q4, the drain electrode of FET q1
Export after being connected with the source electrode of FET q2, and the drain electrode of FET q2 and FET q3 drain electrode is connected and simultaneously
Connect power supply, the grid of FET q3 connects power supply by resistance r15, and FET q2 grid passes through resistance r8 and connects electricity
Source.
Specifically, the cr pin of described pulse width modulation controlled integrated circuit is grounded by electric capacity c, and rr pin passes through resistance r3
Ground connection, electric capacity c and resistance r3 composition oscillating circuit.
Specifically, setting series resistance r7 and resistance between the grid of described FET q1 and the base stage of triode q6
r6.
Specifically, setting series resistance r14 and resistance between the grid of described FET q4 and the base stage of triode q5
r13.
Present configuration is simple, and design concept is ingenious, and circuit operates steadily reliable it is achieved that exporting pulse by adjustment
The purpose of the virtual value of pulsewidth and then regulation output, reduces the energy loss of circuit, is easy to use and safeguards, extends product
Service life.The present invention can be widely applied to charger, switchs in power supply.
Brief description
Fig. 1 is the structural representation of specific embodiment；
Fig. 2 is output pulse schematic diagram.
Specific embodiment
It is illustrated in figure 1 the structural representation of pulse width regulating circuit, including pulse width modulation controlled integrated circuit, FET
And triode.The power pins of pulse width modulation controlled integrated circuit connect power supply, the e1 of pulse width modulation controlled integrated circuit, e2,
Gnd pin is grounded simultaneously, and the c1 of pulse width modulation controlled integrated circuit connects power supply by resistance r5, and c2 pin passes through resistance r4 even
Connect power supply, the input pin+in1 of described pulse width modulation controlled integrated circuit connects feedback resistance r10, and resistance r10 is grounded simultaneously,
Comparison pin-the in1 of pulse width modulation controlled integrated circuit is simultaneously connected with its cout pin, 5v ref pin；And pulsewidth modulation
The output pin pwn controlling integrated circuit is connected with its time controlling switch dtime pin.The integrated electricity of described pulse width modulation controlled
The cr pin on road is grounded by electric capacity c, and rr pin is grounded by resistance r3, electric capacity c and resistance r3 composition oscillating circuit.
After the c1 output of pulse width modulation controlled integrated circuit with the base stage of the grid of FET q4 and triode q5 simultaneously
Connect, setting series resistance r14 and resistance r13 between the base stage of the grid of FET q4 and triode q5；Pulsewidth modulation control
It is simultaneously connected with the grid of FET q1 and the base stage of triode q6 after the c2 output of integrated circuit processed, the grid of FET q1
Setting series resistance r7 and resistance r6, the emitter stage of triode q6 and triode q5 emitter stage between the base stage of pole and triode q6
It is connected and be grounded simultaneously；Triode q5 colelctor electrode is connected with the grid of FET q3, the colelctor electrode of triode q6 and field
The grid of effect pipe q2 is connected, the source electrode of FET q1 be connected with the source electrode of FET q4 and simultaneously with pulsewidth modulation
Input pin+the in1 controlling integrated circuit connects, and the source electrode of FET q3 is defeated after being connected with the drain electrode of FET q4
Go out, the drain electrode of FET q1 is exported after being connected with the source electrode of FET q2, and the drain electrode of FET q2 and field-effect
Pipe q3 drain electrode is connected and is simultaneously connected with power supply, and the grid of FET q3 connects power supply, FET q2 grid by resistance r15
Pole connects power supply by resistance r8.
The present invention passes through to input the information of FET q4 and FET q1 and feedback resistance r10 to pulsewidth modulation control
In integrated circuit processed, by the concussion pulse exporting a proper pulse width more afterwards of pulse width modulation controlled integrated circuit, such as Fig. 2
Shown FET q1 and FET q3 conducting when for positive pulse, one value of now output；When pulse width modulation controlled is integrated
When circuit output is negative pulse, FET q2 and FET q4 conducting, one value of now output, go round and begin again output, arteries and veins
The magnitude of voltage of wider output is bigger, and the magnitude of voltage of the narrower output of contrary pulsewidth is less.
Claims (4)
1. pulse width regulating circuit, including pulse width modulation controlled integrated circuit, FET and triode, pulse width modulation controlled is integrated
The power pins of circuit connect power supply, and e1, e2, gnd pin of pulse width modulation controlled integrated circuit is grounded simultaneously, and its feature exists
In the c1 of pulse width modulation controlled integrated circuit connects power supply by resistance r5, and c2 pin connects power supply, described arteries and veins by resistance r4
Input pin+the in1 of wide modulation control integrated circuit connects feedback resistance r10, and resistance r10 is grounded simultaneously, pulse width modulation controlled
Comparison pin-the in1 of integrated circuit is simultaneously connected with its cout pin, 5v ref pin；And pulse width modulation controlled integrated circuit
Output pin pwn be connected with its time controlling switch dtime pin；With field after the c1 output of pulse width modulation controlled integrated circuit
The base stage of the grid of effect pipe q4 and triode q5 is simultaneously connected with, with field-effect after the c2 output of pulse width modulation controlled integrated circuit
The base stage of the grid of pipe q1 and triode q6 is simultaneously connected with, and the emitter stage of triode q6 is connected with triode q5 emitter stage and same
When ground connection, triode q5 colelctor electrode is connected with the grid of FET q3, the colelctor electrode of triode q6 and FET q2's
Grid is connected, and the source electrode of FET q1 is connected with the source electrode of FET q4 and the integrated electricity with pulse width modulation controlled simultaneously
Input pin+the in1 on road connects, and the source electrode of FET q3 is exported after being connected with the drain electrode of FET q4, FET
The drain electrode of q1 is exported after being connected with the source electrode of FET q2, and the drain electrode of FET q2 is connected with FET q3 drain electrode
Connect and be simultaneously connected with power supply, the grid of FET q3 connects power supply by resistance r15, and FET q2 grid passes through resistance r8
Connect power supply.
2. according to claim 1 pulse width regulating circuit it is characterised in that the cr of described pulse width modulation controlled integrated circuit draws
Pin is grounded by electric capacity c, and rr pin is grounded by resistance r3, electric capacity c and resistance r3 composition oscillating circuit.
3. according to claim 1 pulse width regulating circuit it is characterised in that the grid of described FET q1 and triode q6
Base stage between setting series resistance r7 and resistance r6.
4. according to claim 1 pulse width regulating circuit it is characterised in that the grid of described FET q4 and triode q5
Base stage between setting series resistance r14 and resistance r13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410312471.6A CN104124948B (en) | 2014-07-03 | 2014-07-03 | Pulse width modulating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410312471.6A CN104124948B (en) | 2014-07-03 | 2014-07-03 | Pulse width modulating circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104124948A CN104124948A (en) | 2014-10-29 |
| CN104124948B true CN104124948B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410312471.6A Active CN104124948B (en) | 2014-07-03 | 2014-07-03 | Pulse width modulating circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN104124948B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071339A (en) * | 2015-07-22 | 2015-11-18 | 濮阳市立圆汽车电器有限公司 | Over-current protection circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2836861Y (en) * | 2005-10-11 | 2006-11-15 | 西安石油大学 | Digital controlled driver of electric running machine |
| CN201323553Y (en) * | 2009-01-21 | 2009-10-07 | 李洪资 | Novel pulse width modulation amplifier |
| CN203180865U (en) * | 2013-04-08 | 2013-09-04 | 电子科技大学 | Time-delay generation circuit with pulse width adjustable |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201138315A (en) * | 2010-04-21 | 2011-11-01 | Hon Hai Prec Ind Co Ltd | Pulse-width modulation compensation circuit |
-
2014
- 2014-07-03 CN CN201410312471.6A patent/CN104124948B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2836861Y (en) * | 2005-10-11 | 2006-11-15 | 西安石油大学 | Digital controlled driver of electric running machine |
| CN201323553Y (en) * | 2009-01-21 | 2009-10-07 | 李洪资 | Novel pulse width modulation amplifier |
| CN203180865U (en) * | 2013-04-08 | 2013-09-04 | 电子科技大学 | Time-delay generation circuit with pulse width adjustable |
Non-Patent Citations (1)
| Title |
|---|
| "电压驱动型脉宽调制器TL494";谢春林;《国外电子元器件》;20010228(第2期);第66-67页 * |
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| Publication number | Publication date |
|---|---|
| CN104124948A (en) | 2014-10-29 |
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