CN203859695U - High-performance adjustable direct-current voltage-stabilized power supply - Google Patents
High-performance adjustable direct-current voltage-stabilized power supply Download PDFInfo
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- CN203859695U CN203859695U CN201420190510.5U CN201420190510U CN203859695U CN 203859695 U CN203859695 U CN 203859695U CN 201420190510 U CN201420190510 U CN 201420190510U CN 203859695 U CN203859695 U CN 203859695U
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Abstract
The utility model discloses a high-performance adjustable direct-current voltage-stabilized power supply, which comprises an EMI filter circuit, a rectifier filter circuit, an adjustable switch voltage-stabilized circuit, an adjustable linear voltage-stabilized circuit and a soft start circuit. The connection relation is shown in the figure. The pre-stage of the adjustable direct-current voltage-stabilized power supply adopts the adjustable switch voltage-stabilized circuit for voltage reduction, the post-stage adopts the adjustable linear voltage-stabilized circuit for voltage stabilization, output voltage of the adjustable switch voltage-stabilized circuit and the adjustable linear voltage-stabilized circuit adopts a coaxial two-way multi-turn precise linear adjustable potentiometer for adjustment, low voltage difference control on an adjusting tube of the adjustable linear voltage-stabilized circuit can be realized, 1.25 to 15V continuous adjustable direct-current voltage can be outputted, and the maximal output current is 1.5A. The high-performance adjustable direct-current voltage-stabilized power supply has the beneficial effects that voltage-stabilized performance is good, ripples of output voltage are small, the efficiency is high, the size is small, the weight is light, the cost is low, the adjusting precision is high, and the protection functions are perfect.
Description
Technical field
The utility model relates to D.C. regulated power supply technical field, is specifically related to a kind of high-performance adjustable D. C regulated.
Background technology
D.C. regulated power supply is the important component part of various electronic products, adjustable D. C regulated is widely used in the fields such as the maintenance of teaching, scientific research and electronic product, in the market with electronic product in the D.C. regulated power supply that uses roughly have linear direct current regulated power supply and switching power supply two classes.The advantage of linear direct current regulated power supply is that voltage regulation performance is good, and output voltage ripple is little, and circuit is simple, and major defect is that the volume of step-down transformer is large, weight is large, cost is high, the pressure drop of adjustment pipe is larger, and power consumption is high, and the efficiency of stabilized voltage power supply is low.The advantage of switching power supply is that efficiency is high, and volume is little, lightweight, cost is low, major defect is that output voltage ripple is large, and noise is large.
Summary of the invention
For solving the deficiency of existing adjustable D. C regulated, the utility model discloses a kind of high-performance adjustable D. C regulated.The prime of this D.C. regulated power supply adopts the step-down of rearrangeable switch voltage stabilizing circuit, rear class adopts adjustable linear voltage-stabilizing circuit voltage stabilizing, the output voltage of rearrangeable switch voltage stabilizing circuit and adjustable linear voltage-stabilizing circuit voltage stabilizing adopts coaxial duplex multi-turn precision linear adjustable potentiometer to regulate, realize adjustable linear voltage-stabilizing circuit and adjust the low voltage difference control of pipe, the continuously adjustable direct voltage of exportable 1.25～15V, maximum output current is 1.5A.Can be widely used in the field such as the power supply of teaching, scientific research, electronic product and the maintenance of electronic product.
For achieving the above object, the utility model adopts following technical scheme: the utility model is made up of EMI filter circuit, current rectifying and wave filtering circuit, rearrangeable switch voltage stabilizing circuit, adjustable linear voltage-stabilizing circuit and soft starting circuit.The input termination electric main of EMI filter circuit, the input of output termination current rectifying and wave filtering circuit; The output of the input termination current rectifying and wave filtering circuit of rearrangeable switch voltage stabilizing circuit, the input of output termination adjustable line voltage stabilizing circuit; The input of the output termination soft starting circuit of adjustable linear voltage-stabilizing circuit; The voltage-regulation end of the output termination adjustable line voltage stabilizing circuit of soft starting circuit.The continuously adjustable direct voltage of exportable 1.25～15V, maximum output current is 1.5A.
Good effect of the present utility model is: voltage regulation performance is good, and output voltage ripple is little, and efficiency is high, and volume is little, lightweight, cost is low, degree of regulation is high, defencive function is perfect.
Brief description of the drawings
Fig. 1 is block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, the utility model is made up of EMI filter circuit, current rectifying and wave filtering circuit, rearrangeable switch voltage stabilizing circuit, adjustable linear voltage-stabilizing circuit and soft starting circuit.The input termination electric main of EMI filter circuit, the input of output termination current rectifying and wave filtering circuit; The output of the input termination current rectifying and wave filtering circuit of rearrangeable switch voltage stabilizing circuit, the input of output termination adjustable line voltage stabilizing circuit; The input of the output termination soft starting circuit of adjustable linear voltage-stabilizing circuit; The voltage-regulation end of the output termination adjustable line voltage stabilizing circuit of soft starting circuit.The continuously adjustable direct voltage of exportable 1.25～15V, maximum output current is 1.5A.
As shown in Figure 2.
The low-pass filter circuit that EMI filter circuit is made up of capacitor C 1 and common mode inductance L1, the high-frequency electromagnetic that can suppress between mains supply and D.C. regulated power supply disturbs.C1 is used for suppressing series mode interference signal, and L1 is used for suppressing common mode interference signal.
Current rectifying and wave filtering circuit is made up of bridge rectifier BD1 and filter capacitor C2.To the line voltage rectifying and wave-filtering of input, obtain the direct voltage of 300V left and right, be the power supply of rearrangeable switch voltage stabilizing circuit.
Rearrangeable switch voltage stabilizing circuit is by integrated circuit TNY279PN, PC871, TL431, resistance R 1, R2, R3, R4, capacitor C 3, C4, C5, C6, diode D1, D2, derailing switch T1, multi-turn precision linear adjustable potentiometer RP1 composition.The continuously adjustable direct voltage of exportable 5～18V, maximum output current is 1.5A.There is input undervoltage, output overvoltage, overheated and current limit defencive function.
TNY279PN is the Converter Controlled by Current mode PWM device chip of a built-in 700V power MOSFET; self-powered; without additional biasing circuit, the work of whole rearrangeable switch voltage stabilizing circuit is fed back and is controlled in its acceptance, and input undervoltage, output overvoltage, overheated and current limit protection are provided.The peak voltage that D1, R1 and C3 produce for eliminating switch transformer T1.D2, C6 are the output rectifier and filters of rearrangeable switch voltage stabilizing circuit.
R4 and RP1 are the output voltage sample resistances of rearrangeable switch voltage stabilizing circuit, they determine that to the dividing potential drop of output the REF of TL431 brings in the shunting of this device of control from negative electrode to anode, this electric current directly drives again the luminous component of optocoupler PC871, in the time that output voltage has the trend that becomes large, and V
refincrease thereupon and cause the electric current that flows through TL431 to increase, so the luminous enhancing of optocoupler, the feedback voltage that sensitization end obtains is also just larger, and TNY279PN is accepting to change after this becomes large feedback voltage the switching time of MOSFET, and output voltage reduces thereupon.R4 and RP1 are designed to respectively 430 Ω and 2.7K Ω by the utility model, and the output voltage of rearrangeable switch voltage stabilizing circuit can be adjustable continuously between 5V～18V.
Adjustable linear voltage-stabilizing circuit is by three end adjustable voltage-regulating ic device LM317; filter capacitor C7, C9; output voltage sample resistance R5, multi-turn precision linear adjustable potentiometer RP2 and protection diode D3, D4 composition; R5 and RP2 are designed to respectively 240 Ω and 2.7K Ω by the utility model, and the output voltage of adjustable linear voltage-stabilizing circuit can be adjustable continuously between 1.25～15V.
The high-performance adjustable D. C regulated of the utility model design, RP1 and RP2 are coaxial duplex multi-turn precision linear adjustable potentiometer, regulate coaxial duplex multi-turn precision linear adjustable potentiometer, can make the input voltage high 3～5V of specific output voltage all the time of three end adjustable voltage-regulating ic device LM317 of adjustable linear voltage-stabilizing circuit, realize the low voltage difference control of adjusting pipe, adjustable linear voltage-stabilizing circuit can remain high efficiency within the scope of whole adjustable output voltage.
C7, for improving the Ripple Suppression ratio of voltage stabilizing circuit, reduces the ripple component of output voltage.C9 is used for preventing LM317 issuable self-oscillation under deep negative feedback operation, and can further reduce the ripple component of output voltage.The effect of D3 is while preventing the input short circuit of linear voltage-stabilizing circuit, and capacitor C 9 electric discharges damage three end adjustable voltage-regulating ic devices.The effect of D4 is while preventing the output short circuit of linear voltage-stabilizing circuit, and capacitor C 7 electric discharges damage three end adjustable voltage-regulating ic devices.When normal work, protection diode D3, D4 are in cut-off state.
Soft starting circuit is by triode BG1, and resistance R 6, R7 and capacitor C 8 form, and the positive pole of its input C8 connects the output of LM317, and output BG1 collector electrode connects the output voltage adjustable side of LM317.The effect of soft starting circuit is to make the output voltage of linear voltage-stabilizing circuit have a uphill process slowly, to adapt to the starting characteristic of perception or capacitive load, prevents the excessive damage of starting current LM317.In the time that mains input voltage is accessed, because capacitor C 8 has larger charging current, BG1 saturation conduction, makes the voltage of output voltage adjustable side of LM317 very low, therefore output voltage is very low, along with the charging of C8, the base current of BG1 reduces, and its collector potential raises, the output voltage of LM317 raises, when C8 charges when complete, BG1 cut-off, output voltage reaches set point.Can adjust start-up time by the value of change and C8 and R7, and C8 is designed to 10 μ F by the utility model, and R7 is designed to 200K Ω, and be 2 seconds start-up time.
The high-performance adjustable D. C regulated of the utility model design; switch voltage-stabilizing circuit adopts the simple TNY279PN Converter Controlled by Current mode PWM of function admirable peripheral circuit device chip; linear voltage-stabilizing circuit adopts three end adjustable voltage-regulating ic device LM317 of function admirable; output voltage adopts coaxial duplex multi-turn precision linear adjustable potentiometer to regulate; circuit is simple, and cost is low, and volume is little, lightweight, degree of regulation is high, defencive function is perfect; output voltage stability is high, and ripple is little.When mains input voltage changes in 90VAC～264V input range, the stability of power supply≤0.01% ± 2mV of output voltage.Laod stability≤0.01% ± 2mV, ripple voltage is less than 1mV
p-P, internal resistance≤30m Ω, efficiency when nominal load is greater than 84%, has overcurrent, overheated, input and output short-circuit protection function, and efficiency is high.
The high-performance adjustable D. C regulated of the utility model design, can be widely used in the field such as the power supply of teaching, scientific research, electronic product and the maintenance of electronic product, has wide market prospects.
Claims (5)
1. a high-performance adjustable D. C regulated, is characterized in that: it is made up of EMI filter circuit, current rectifying and wave filtering circuit, rearrangeable switch voltage stabilizing circuit, adjustable linear voltage-stabilizing circuit and soft starting circuit; The input termination electric main of EMI filter circuit, the input of output termination current rectifying and wave filtering circuit; The output of the input termination current rectifying and wave filtering circuit of rearrangeable switch voltage stabilizing circuit, the input of output termination adjustable line voltage stabilizing circuit; The input of the output termination soft starting circuit of adjustable linear voltage-stabilizing circuit; The voltage-regulation end of the output termination adjustable line voltage stabilizing circuit of soft starting circuit; The continuously adjustable direct voltage of exportable 1.25～15V, maximum output current is 1.5A.
2. a kind of high-performance adjustable D. C regulated according to claim 1, is characterized in that: the low-pass filter circuit that EMI filter circuit is made up of capacitor C 1 and common mode inductance L1.
3. a kind of high-performance adjustable D. C regulated according to claim 1, it is characterized in that: rearrangeable switch voltage stabilizing circuit is by integrated circuit TNY279PN, PC871, TL431, resistance R 1, R2, R3, R4, capacitor C 3, C4, C5, C6, diode D1, D2, derailing switch T1, multi-turn precision linear adjustable potentiometer RP1 composition; R4 and RP1 are designed to respectively 430 Ω and 2.7K Ω, and rearrangeable switch stabilized circuit outputting voltage can be adjustable continuously between 5V～18V.
4. a kind of high-performance adjustable D. C regulated according to claim 1, it is characterized in that: adjustable linear voltage-stabilizing circuit is by three end adjustable voltage-regulating ic device LM317, filter capacitor C7, C9, output voltage sample resistance R5, multi-turn precision linear adjustable potentiometer RP2 and protection diode D3, D4 composition; R5 and RP2 are designed to respectively 240 Ω and 2.7K Ω, and the output voltage of adjustable linear voltage-stabilizing circuit can be adjustable continuously between 1.25～15V.
5. a kind of high-performance adjustable D. C regulated according to claim 1, it is characterized in that: soft starting circuit is by triode BG1, resistance R 6, R7 and capacitor C 8 form, the positive pole of its input C8 connects the output of LM317, output BG1 collector electrode connects the output voltage adjustable side of LM317, C8 is designed to 10 μ F, and R7 is designed to 200K Ω, and be 2 seconds start-up time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420190510.5U CN203859695U (en) | 2014-04-19 | 2014-04-19 | High-performance adjustable direct-current voltage-stabilized power supply |
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| CN201420190510.5U CN203859695U (en) | 2014-04-19 | 2014-04-19 | High-performance adjustable direct-current voltage-stabilized power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887995A (en) * | 2014-04-19 | 2014-06-25 | 张新安 | High-performance adjustable direct-current stabilized power source |
| CN105375563A (en) * | 2015-10-28 | 2016-03-02 | 邹小辉 | Lithium battery charging control circuit |
| CN105871227A (en) * | 2016-06-14 | 2016-08-17 | 四川福豆科技有限公司 | Application service system based on mobile working |
| CN105932892A (en) * | 2016-05-31 | 2016-09-07 | 中国电子科技集团公司第四十研究所 | Input-output common ground based high-voltage adjustable step-down circuit |
-
2014
- 2014-04-19 CN CN201420190510.5U patent/CN203859695U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887995A (en) * | 2014-04-19 | 2014-06-25 | 张新安 | High-performance adjustable direct-current stabilized power source |
| CN105375563A (en) * | 2015-10-28 | 2016-03-02 | 邹小辉 | Lithium battery charging control circuit |
| CN105375563B (en) * | 2015-10-28 | 2017-08-25 | 江西省灿辉新能源科技有限公司 | A kind of lithium cell charging controls circuit |
| CN105932892A (en) * | 2016-05-31 | 2016-09-07 | 中国电子科技集团公司第四十研究所 | Input-output common ground based high-voltage adjustable step-down circuit |
| CN105871227A (en) * | 2016-06-14 | 2016-08-17 | 四川福豆科技有限公司 | Application service system based on mobile working |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20150419 |
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| EXPY | Termination of patent right or utility model |