CN106787709A - Wide input range power circuit - Google Patents
Wide input range power circuit Download PDFInfo
- Publication number
- CN106787709A CN106787709A CN201611181823.4A CN201611181823A CN106787709A CN 106787709 A CN106787709 A CN 106787709A CN 201611181823 A CN201611181823 A CN 201611181823A CN 106787709 A CN106787709 A CN 106787709A
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- Prior art keywords
- resistor
- pins
- grounded
- capacitor
- inductor
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- 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.)
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Classifications
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- 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
- H02M3/1563—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 without using an external clock
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention discloses a kind of wide input range power circuit, and electrolytic capacitor C1 and non-polar condenser C2 bridging power supply and ground connection, the Vin pins of PWM chip connect power supply, and COMP pin termination resistors R1 is followed by capacitor C3, then is grounded；Capacitor C4 connects COMP pins and is grounded；It is grounded after FA pin termination resistors R2；It is grounded after FB pin termination resistors R8；DR pins connect the grid of NMOSFET chips；ISENSE pins are grounded after meeting capacitor C5；Inductor L1 connects power supply and capacitor C6 connects ground connection after inductor L2 again；Capacitor C7 meets C6 and resistor R6；Resistor R6 meets R7；Diode D1 meets capacitor C6, resistor R7；Resistor R7 meets FB；The drain electrode string resistance device R5 of NMOSFET, resistor R5 are connected with inductor L1；The source electrode of NMOSFET is connected with resistor R3, R4 respectively, and R3 connects ISENSE pins, R4 ground connection.The wide input range power circuit solves the problems, such as that LDO caloric values are big, efficiency is low using PWM copped wave chips, and can automatically adjust output voltage, so as to reach the purpose of Isobarically Control.
Description
Technical field
The invention belongs to electronic circuit technology field, more particularly to a kind of wide input range power circuit.
Background technology
With the development of prior art, traditional electronic transformer is due to being linear convergent rate, so facing when power network electricity
When pressure fluctuation, output voltage also can synchronously follow fluctuation so that common LDO circuit has big some of caloric value and asks
Topic.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of wide input range power circuit, with PWM chop controls
Structure, can adjust the size of dutycycle, so that solve above-mentioned LDO caloric values greatly, the low problem of efficiency；There is output simultaneously
Voltage Feedback function, can automatically adjust output voltage, so as to reach the purpose of Isobarically Control.
Therefore, technical scheme is as follows：
A kind of wide input range power circuit, including resistor R1~R8, electrolytic capacitor C1, non-polar condenser C2~
C7, inductor L1, inductor L2, diode D1, NMOSFET chip Q1 and PWM chip U1；
The positive pole connection power supply of the electrolytic capacitor C1, negative pole ground connection；The second non-polar condenser C2 is connected in parallel on
The two ends of the electrolytic capacitor C1；
The PWM chip U1 is the pwm chip with buck voltage stabilizing function, its Vin pin connection power supply, COMP
Connected with the 3rd non-polar condenser C3 after pin connection first resistor device R1, then be grounded；4th non-polar condenser C4 one end
It is connected with COMP pins, other end ground connection；FA pins are grounded after being connected with second resistance device R2；AGND pins, PGND pins are equal
Ground connection；FB pins are grounded after being connected with the 8th resistor R8；DR pins are connected with the grid of the NMOSFET chips Q1；
ISENSE pins are connected with the 5th non-polar condenser C5, then are grounded；
The first end connection power supply of the inductor L1, the second end is connected with the first end of the 6th non-polar condenser C6；
Second end of the 6th non-polar condenser C6 is grounded after being connected with the inductor L2；The one of 7th non-polar condenser C7
End is connected with second end of the 6th non-polar condenser C6, and the other end is connected with the 6th resistor R6；6th resistor R6 is connected
In the first end of the 7th resistor R7；
The diode D1 positive poles are connected to second end of the 6th non-polar condenser C6, and negative pole is connected to the 7th resistor
The first end of R7；
Second end of the 7th resistor R7 is connected on the FB pins of PWM chip；
The drain electrode of the NMOSFET is connected with the 5th resistor R5, and second end of the 5th resistor R5 and inductor L1 connects
Connect；The source electrode of NMOSFET is connected with 3rd resistor device R3 and the 4th resistor R4 respectively, and 3rd resistor device R3 is connected to PWM cores
On the ISENSE pins of piece U1；4th resistor R4 is grounded.
It is preferred that, the electromotive force of power supply is 24V.
The wide input range power circuit is arranged on the rear portion of electronic transformer, main to complete unstable dc source
It is converted into galvanic current source and is supplied to system.Its produced effect is as follows：
1) with feedback function, the size of output voltage can be adjusted, can keeps permanent when voltage ripple of power network
Fixed output voltage.
2) constituted using discrete device, increased the flexibility of design.
3) due to the regulation of dutycycle can be carried out by PWM chip, so with less power loss, can be in high temperature
Occasion is used.
Brief description of the drawings
The composition frame chart of the wide input range power circuit that Fig. 1 is provided for the present invention.
Specific embodiment
Technical scheme is described in detail below in conjunction with the drawings and specific embodiments.
It is as shown in figure 1, a kind of wide input range power circuit including resistor R1~R8, electrolytic capacitor C1, nonpolarity
Capacitor C2~C7, inductor L1, inductor L2, diode D1, NMOSFET chip Q1 and PWM chip U1；
The positive pole connection power supply of electrolytic capacitor C1, negative pole ground connection；Second non-polar condenser C2 is connected in parallel on electrochemical capacitor
The two ends of device C1；
PWM chip U1 is the pwm chip with buck voltage stabilizing function, its Vin pin connection power supply, COMP pins
Connected with the 3rd non-polar condenser C3 after connection first resistor device R1, then be grounded；4th non-polar condenser C4 one end with
COMP pins are connected, other end ground connection；FA pins are grounded after being connected with second resistance device R2；AGND pins, PGND pins connect
Ground；FB pins are grounded after being connected with the 8th resistor R8；DR pins are connected with the grid of NMOSFET chips Q1；ISENSE pins
Connected with the 5th non-polar condenser C5, then be grounded；
The first end connection power supply of inductor L1, the second end is connected with the first end of the 6th non-polar condenser C6；6th
Second end of non-polar condenser C6 is grounded after being connected with inductor L2；One end of 7th non-polar condenser C7 is electrodeless with the 6th
Property capacitor C6 the connection of the second end, the other end connects with the 6th resistor R6；6th resistor R6 is connected to the 7th resistor
The first end of R7；
Diode D1 positive poles are connected to second end of the 6th non-polar condenser C6, and negative pole is connected to the 7th resistor R7's
First end；
Second end of the 7th resistor R7 is connected on the FB pins of PWM chip；
The drain electrode of NMOSFET is connected with the 5th resistor R5, and the 5th resistor R5 is connected with second end of inductor L1；
The source electrode of NMOSFET is connected with 3rd resistor device R3 and the 4th resistor R4 respectively, and 3rd resistor device R3 is connected to PWM chip U1
ISENSE pins on；4th resistor R4 is grounded.
In this specific implementation process, the electromotive force of power supply is 24V.
Operation principle of the invention is as follows, and power supply enters from POWER ports, by dc capacitor C1, nonpolarity electricity
Hold C2, the high-frequency ac composition in power supply is switched into reference point.When the DR pins of PWM chip put high, power supply passes through
Inductor L1 enters NMOSFET chip Q1, and starts to give inductor L1 energy storage, when the DR pins of PWM chip set low, electricity
Sensor L1 energy storage enters capacitor C6, and when the DR pins of PWM chip put high again, the energy of capacitor C6 is discharged into
Inductor L2, when the DR pins of PWM chip set low again, energy is entered by inductor L2 uses electric loading, so passes through
Two circulations of the DR pins of PWM chip, outlet side is delivered to by energy by input side.Meanwhile, the FB pins of PWM chip connect
Changed by voltage, compared with the internal wave circuit that accounts for, adjustment DR pins are put the time high to reach the big of control energy transmission
It is small, realize the function of voltage stabilizing.
Claims (2)
1. a kind of wide input range power circuit, it is characterised in that：Including resistor R1~R8, electrolytic capacitor C1, nonpolarity
Capacitor C2~C7, inductor L1, inductor L2, diode D1, NMOSFET chip Q1 and PWM chip U1；
The positive pole connection power supply of the electrolytic capacitor C1, negative pole ground connection；The second non-polar condenser C2 is connected in parallel on described
The two ends of electrolytic capacitor C1；
The PWM chip U1 is the pwm chip with buck voltage stabilizing function, its Vin pin connection power supply, COMP pins
Connected with the 3rd non-polar condenser C3 after connection first resistor device R1, then be grounded；4th non-polar condenser C4 one end with
COMP pins are connected, other end ground connection；FA pins are grounded after being connected with second resistance device R2；AGND pins, PGND pins connect
Ground；FB pins are grounded after being connected with the 8th resistor R8；DR pins are connected with the grid of the NMOSFET chips Q1；ISENSE
Pin is connected with the 5th non-polar condenser C5, then is grounded；
The first end connection power supply of the inductor L1, the second end is connected with the first end of the 6th non-polar condenser C6；It is described
Second end of the 6th non-polar condenser C6 is grounded after being connected with the inductor L2；One end of 7th non-polar condenser C7 with
The second end connection of the 6th non-polar condenser C6, the other end is connected with the 6th resistor R6；6th resistor R6 is connected to
The first end of seven resistor R7；
The diode D1 positive poles are connected to second end of the 6th non-polar condenser C6, and negative pole is connected to the 7th resistor R7's
First end；
Second end of the 7th resistor R7 is connected on the FB pins of PWM chip；
The drain electrode of the NMOSFET is connected with the 5th resistor R5, and the 5th resistor R5 is connected with second end of inductor L1；
The source electrode of NMOSFET is connected with 3rd resistor device R3 and the 4th resistor R4 respectively, and 3rd resistor device R3 is connected to PWM chip U1
ISENSE pins on；4th resistor R4 is grounded.
2. wide input range power circuit as claimed in claim 1, it is characterised in that：The electromotive force of power supply is 24V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611181823.4A CN106787709A (en) | 2016-12-20 | 2016-12-20 | Wide input range power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611181823.4A CN106787709A (en) | 2016-12-20 | 2016-12-20 | Wide input range power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106787709A true CN106787709A (en) | 2017-05-31 |
Family
ID=58889391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611181823.4A Pending CN106787709A (en) | 2016-12-20 | 2016-12-20 | Wide input range power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106787709A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150207307A1 (en) * | 2014-01-17 | 2015-07-23 | Beyond Innovation Technology Co., Ltd. | Boost apparatus with over-current and over-voltage protection function |
| CN204967614U (en) * | 2015-09-28 | 2016-01-13 | 季春 | Switching power supply is transferred in counting of high accuracy wide region |
| CN204967613U (en) * | 2015-09-28 | 2016-01-13 | 季春 | Wide region self -adaptation supply circuit for programmable device |
-
2016
- 2016-12-20 CN CN201611181823.4A patent/CN106787709A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150207307A1 (en) * | 2014-01-17 | 2015-07-23 | Beyond Innovation Technology Co., Ltd. | Boost apparatus with over-current and over-voltage protection function |
| CN204967614U (en) * | 2015-09-28 | 2016-01-13 | 季春 | Switching power supply is transferred in counting of high accuracy wide region |
| CN204967613U (en) * | 2015-09-28 | 2016-01-13 | 季春 | Wide region self -adaptation supply circuit for programmable device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20170531 |