CN201966640U - Voltage and current timely feed control circuit - Google Patents
Voltage and current timely feed control circuit Download PDFInfo
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- CN201966640U CN201966640U CN201020692258XU CN201020692258U CN201966640U CN 201966640 U CN201966640 U CN 201966640U CN 201020692258X U CN201020692258X U CN 201020692258XU CN 201020692258 U CN201020692258 U CN 201020692258U CN 201966640 U CN201966640 U CN 201966640U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a voltage and current timely feed control circuit which consists of a feed resistance unit, a voltage dividing unit, an inverting amplifier unit, a positive amplifier unit, a current sampling resistance RIC, a fixed capacitance C1, a fixed capacitance C2, a fixed resistance RC, a fixed resistance RV, a node Vin2, an external reference signal Vref1 and an external reference signal Vref2. The low-voltage current timely feed control circuit has the advantages of simple structure, easily controlled output voltages and output currents, and higher charging efficiency; moreover, the low-voltage current timely feed control circuit can be applied to charger controlling, and realizes high efficiency charging management by employing DCDC (direct current direct current).
Description
(1) technical field:
The utility model relates to the charging control circuit field, the in good time feedback control circuit of especially a kind of electric current and voltage.
(2) background technology:
Charger is the product of electronic technology and electrical equipment combination, and we are not using it all the time.The development of the rapidity of portable type electronic product impels the kind of battery to increase and performance improves, and the yields have increased considerably to make rechargeable battery, and the requirement to charger also is tending towards the efficient height simultaneously, volume is little, cost is low, in light weight and safe and practical.Charger adopts Switching Power Supply to combine realization with linear voltage regulator at present, when linear voltage regulator carries out Current Control, very big power consumption penalty will be had, and the utility model provides a kind of electric current and voltage adaptation control circuit, realize the electric current and voltage adaptive control, directly utilized Switching Power Supply to realize the high efficiency Charge Management.
(3) utility model content:
The purpose of this utility model is to provide a kind of electric current and voltage in good time feedback control circuit, and it can overcome the deficiencies in the prior art, is a kind of efficient height, easy-operating electric current and voltage adaptation control circuit.
The technical solution of the utility model: the in good time feedback control circuit of a kind of electric current and voltage, comprise the Buck type DCDC chip that has voltage output end Vout and feedback voltage signal collection terminal VFB, it is characterized in that it is made up of feedback resistance element, partial pressure unit, sign-changing amplifier unit, forward amplifier unit, current sampling resistor RIC, fixed capacity C1, fixed capacity C2, fixed resistance RC, fixed resistance RV, node Vin2, external reference signal Vref1 and external reference signal Vref2; Wherein, an end of said feedback resistance element connects the voltage output end Vout of Buck DCDC chip, an end ground connection, and its output is connected with the feedback voltage signal collection terminal VFB of Buck type DCDC chip, for it provides feedback voltage signal; Said feedback resistance element also is connected with the output of forward amplifier unit through fixed resistance RC, simultaneously through fixed resistance RC and fixed capacity C2 ground connection; Said feedback resistance element also is connected with the output of sign-changing amplifier unit through fixed resistance RV, simultaneously through fixed resistance RV and fixed capacity C1 ground connection; One end of said partial pressure unit connects VFB, an end ground connection, and output is connected with the input of sign-changing amplifier unit; Said sign-changing amplifier unit reverse input end is connected with the output of partial pressure unit, and its positive input is gathered external reference signal Vref1, and its output is connected with feedback resistance element through fixed resistance RV, simultaneously through fixed capacity C1 ground connection; Said forward amplifier unit positive input connects current sampling resistor RIC and node Vin2, and its negative input receives external reference signal Vref2, and its output is connected with feedback resistance element through fixed resistance RC, simultaneously through fixed capacity C2 ground connection.
Above-mentioned said feedback resistance element comprises fixed resistance R0, fixed resistance RF1 and fixed resistance RF2; The end of wherein said fixed resistance RF2 connects the voltage output end Vout of Buck type DCDC chip, other end series connection fixed resistance RF1, and tie point V3 is arranged between the two; The other end series connection fixed resistance R0 of said fixed resistance RF1, and the tie point between the two connects the feedback voltage signal collection terminal VFB of Buck DCDC chip; Said fixed resistance R0 other end ground connection; Tie point V3 between said fixed resistance RF1 and the fixed resistance RF2 is connected with the output of forward amplifier unit, the output of sign-changing amplifier unit through fixed resistance RC, fixed resistance RV respectively.
Above-mentioned said partial pressure unit is made up of fixed resistance RB1 and fixed resistance RB2, and the two is connected mutually, and wherein the other end of fixed resistance RB2 connects VB, the other end ground connection of fixed resistance RB1; Between fixed resistance RB1 and the fixed resistance RB2 node Vin1 is arranged, and this node is connected with the input of sign-changing amplifier unit.
Above-mentioned said sign-changing amplifier unit is to be made of fixed resistance RVI, fixed resistance RVF and operational amplifier A 1; Wherein said operational amplifier A 1 negative input is connected with node Vin1 in the partial pressure unit through fixed resistance RVI, be connected with the output of operational amplifier A 1 through fixed resistance RVF simultaneously, its positive input is gathered external reference signal Vref1, the output of said operational amplifier A 1 is connected with feedback resistance element through fixed resistance RV, simultaneously through fixed capacity C1 ground connection.
Above-mentioned said forward amplifier unit is to be made of fixed resistance RCI, fixed resistance RCF and operational amplifier A 2; Wherein said operational amplifier A 2 negative inputs are gathered external reference signal Vref1 through fixed resistance RCI, be connected with the output of operational amplifier A 2 through fixed resistance RCF simultaneously, its positive input is connected with node Vin2 with current sampling resistor RIC, its output then is connected with feedback resistance element through fixed resistance RC, simultaneously through fixed capacity C2 ground connection.
Operation principle of the present utility model: resistance R F2, RF1, R0 constitute the feedback resistive network of DCDC; Resistance R B1, RB2 constitute the potential-divider network of voltage VB, produce voltage node Vin1; Resistance R VI, RVF, operational amplifier A 1 constitutes sign-changing amplifier, with the voltage amplification of node Vin1 to voltage V1; Resistance R IC is a current sampling resistor, and the electric current I that flows through resistance R IC produces voltage drop Vin2; Resistance R CI, RCF, operational amplifier A 2 constitutes the forward amplifiers, with the voltage amplification of node Vin2 to voltage V2; Node voltage V1, V2 shunt the electric current at the node V3 place of resistance R F2, RF1, R0 dividing potential drop in the feedback resistive network of DCDC, thereby realize that by voltage and the electric current I of VB DCDC exports the adjusting of Vout.Concrete steps are as follows:
1. feedback resistance element, its output voltage is:
Vout＝V3+(VFB/R0+(V3-V1)/RV+(V3-V2)/RC)*RF2
2. and according to the dividing potential drop theorem, the voltage that then can calculate node V3 is:
V3＝(R0+RF1)*VFB/R0
3. according to the dividing potential drop theorem, the output voltage of node Vin1 is in the partial pressure unit:
Vin1＝RB1*VB/(RB1+RB2)
4. and according to the characteristic of operational amplifier A 1, can be with the voltage amplification of node Vin1 to voltage V1, that is: V1=RVF* (Vref1-Vin1)/RVI
5. resistance R IC is a current sampling resistor, and the electric current I that flows through sampling resistor RIC produces voltage drop Vin2, that is: Vin2=I*RIC
6. same, according to the characteristic of operational amplifier A 2, can be with the voltage amplification of node Vin2 to voltage V2, that is: V2=RCF* (Vin2-Vref2)/RCI+Vin2
7. by step 1. to the 6. formula of gained of step, can derive voltage and the output voltage V out of node V1, node V2:
V1＝RVF*(Vref1-RB1*VB/(RB1+RB2))/RVI
V2＝RCF*(I*RIC-Vref2)/RCI+I*RIC
Vout＝(R0+RF1)*VFB/R0+(VFB/R0+((R0+RF1)*VFB/R0-V1)/RV+((R0+RF1)*VFB/R0-V2)/RC)*RF2
8. the output result by Vout is only relevant with electric current I in voltage VB, promptly can realize the electric current and voltage adaptive control by circuit of the present utility model.
Superiority of the present utility model: simple in structure, output voltage and output current are easy to control, have higher charge efficiency; Be applied to charger control; Utilize DCDC to realize the high efficiency Charge Management.
(4) description of drawings:
Accompanying drawing is the structural representation of the in good time feedback control circuit of the related a kind of electric current and voltage of the utility model.
(5) embodiment:
Embodiment: the in good time feedback control circuit of a kind of electric current and voltage (seeing accompanying drawing), comprise the Buck type DCDC chip that has voltage output end Vout and feedback voltage signal collection terminal VFB, it is characterized in that it is made up of feedback resistance element, partial pressure unit, sign-changing amplifier unit, forward amplifier unit, current sampling resistor RIC, fixed capacity C1, fixed capacity C2, fixed resistance RC, fixed resistance RV, node Vin2, external reference signal Vref1 and external reference signal Vref2; Wherein, an end of said feedback resistance element connects the voltage output end Vout of Buck DCDC chip, an end ground connection, and its output is connected with the feedback voltage signal collection terminal VFB of Buck type DCDC chip, for it provides feedback voltage signal; Said feedback resistance element also is connected with the output of forward amplifier unit through fixed resistance RC, simultaneously through fixed resistance RC and fixed capacity C2 ground connection; Said feedback resistance element also is connected with the output of sign-changing amplifier unit through fixed resistance RV, simultaneously through fixed resistance RV and fixed capacity C1 ground connection; One end of said partial pressure unit connects VFB, an end ground connection, and output is connected with the input of sign-changing amplifier unit; Said sign-changing amplifier unit reverse input end is connected with the output of partial pressure unit, and its positive input is gathered external reference signal Vref1, and its output is connected with feedback resistance element through fixed resistance RV, simultaneously through fixed capacity C1 ground connection; Said forward amplifier unit positive input connects current sampling resistor RIC and node Vin2, and its negative input receives external reference signal Vref2, and its output is connected with feedback resistance element through fixed resistance RC, simultaneously through fixed capacity C2 ground connection.
Above-mentioned said feedback resistance element (seeing accompanying drawing) comprises fixed resistance R0, fixed resistance RF1 and fixed resistance RF2; The end of wherein said fixed resistance RF2 connects the voltage output end Vout of Buck type DCDC chip, other end series connection fixed resistance RF1, and tie point V3 is arranged between the two; The other end series connection fixed resistance R0 of said fixed resistance RF1, and the tie point between the two connects the feedback voltage signal collection terminal VFB of Buck DCDC chip; Said fixed resistance R0 other end ground connection; Tie point V3 between said fixed resistance RF1 and the fixed resistance RF2 is connected with the output of forward amplifier unit, the output of sign-changing amplifier unit through fixed resistance RC, fixed resistance RV respectively.
Above-mentioned said partial pressure unit (seeing accompanying drawing) is made up of fixed resistance RB1 and fixed resistance RB2, and the two is connected mutually, and wherein the other end of fixed resistance RB2 connects VB, the other end ground connection of fixed resistance RB1; Between fixed resistance RB1 and the fixed resistance RB2 node Vin1 is arranged, and this node is connected with the input of sign-changing amplifier unit.
Above-mentioned said sign-changing amplifier unit (seeing accompanying drawing) is to be made of fixed resistance RVI, fixed resistance RVF and operational amplifier A 1; Wherein said operational amplifier A 1 negative input is connected with node Vin1 in the partial pressure unit through fixed resistance RVI, be connected with the output of operational amplifier A 1 through fixed resistance RVF simultaneously, its positive input is gathered external reference signal Vref1, the output of said operational amplifier A 1 is connected with feedback resistance element through fixed resistance RV, simultaneously through fixed capacity C1 ground connection.
Above-mentioned said forward amplifier unit (seeing accompanying drawing) is to be made of fixed resistance RCI, fixed resistance RCF and operational amplifier A 2; Wherein said operational amplifier A 2 negative inputs are gathered external reference signal Vref1 through fixed resistance RCI, be connected with the output of operational amplifier A 2 through fixed resistance RCF simultaneously, its positive input is connected with node Vin2 with current sampling resistor RIC, its output then is connected with feedback resistance element through fixed resistance RC, simultaneously through fixed capacity C2 ground connection.
Claims (5)
1. in good time feedback control circuit of electric current and voltage, comprise the Buck type DCDC chip that has voltage output end Vout and feedback voltage signal collection terminal VFB, it is characterized in that it is made up of feedback resistance element, partial pressure unit, sign-changing amplifier unit, forward amplifier unit, current sampling resistor RIC, fixed capacity C1, fixed capacity C2, fixed resistance RC, fixed resistance RV, node Vin2, external reference signal Vref1 and external reference signal Vref2; Wherein, an end of said feedback resistance element connects the voltage output end Vout of Buck DCDC chip, an end ground connection, and its output is connected with the feedback voltage signal collection terminal VFB of Buck type DCDC chip, for it provides feedback voltage signal; Said feedback resistance element also is connected with the output of forward amplifier unit through fixed resistance RC, simultaneously through fixed resistance RC and fixed capacity C2 ground connection; Said feedback resistance element also is connected with the output of sign-changing amplifier unit through fixed resistance RV, simultaneously through fixed resistance RV and fixed capacity C1 ground connection; One end of said partial pressure unit connects VFB, an end ground connection, and output is connected with the input of sign-changing amplifier unit; Said sign-changing amplifier unit reverse input end is connected with the output of partial pressure unit, and its positive input is gathered external reference signal Vref1, and its output is connected with feedback resistance element through fixed resistance RV, simultaneously through fixed capacity C1 ground connection; Said forward amplifier unit positive input connects current sampling resistor RIC and node Vin2, and its negative input receives external reference signal Vref2, and its output is connected with feedback resistance element through fixed resistance RC, simultaneously through fixed capacity C2 ground connection.
2. according to the in good time feedback control circuit of the described a kind of electric current and voltage of claim 1, it is characterized in that said feedback resistance element comprises fixed resistance R0, fixed resistance RF1 and fixed resistance RF2; The end of wherein said fixed resistance RF2 connects the voltage output end Vout of Buck type DCDC chip, other end series connection fixed resistance RF1, and tie point V3 is arranged between the two; The other end series connection fixed resistance R0 of said fixed resistance RF1, and the tie point between the two connects the feedback voltage signal collection terminal VFB of BuckDCDC chip; Said fixed resistance R0 other end ground connection; Tie point V3 between said fixed resistance RF1 and the fixed resistance RF2 is connected with the output of forward amplifier unit, the output of sign-changing amplifier unit through fixed resistance RC, fixed resistance RV respectively.
3. according to the in good time feedback control circuit of the described a kind of electric current and voltage of claim 1, it is characterized in that said partial pressure unit is made up of fixed resistance RB1 and fixed resistance RB2, the two is connected mutually, and wherein the other end of fixed resistance RB2 connects VB, the other end ground connection of fixed resistance RB1; Between fixed resistance RB1 and the fixed resistance RB2 node Vin1 is arranged, and this node is connected with the input of sign-changing amplifier unit.
4. according to claim 1, the in good time feedback control circuit of 2 or 3 described a kind of electric current and voltages, it is characterized in that said sign-changing amplifier unit is to be made of fixed resistance RVI, fixed resistance RVF and operational amplifier A 1; Wherein said operational amplifier A 1 negative input is connected with node Vin1 in the partial pressure unit through fixed resistance RVI, be connected with the output of operational amplifier A 1 through fixed resistance RVF simultaneously, its positive input is gathered external reference signal Vref1, the output of said operational amplifier A 1 is connected with feedback resistance element through fixed resistance RV, simultaneously through fixed capacity C1 ground connection.
5. according to claim 1 or the in good time feedback control circuit of 2 described a kind of electric current and voltages, it is characterized in that said forward amplifier unit is to be made of fixed resistance RCI, fixed resistance RCF and operational amplifier A 2; Wherein said operational amplifier A 2 negative inputs are gathered external reference signal Vref1 through fixed resistance RCI, be connected with the output of operational amplifier A 2 through fixed resistance RCF simultaneously, its positive input is connected with node Vin2 with current sampling resistor RIC, its output then is connected with feedback resistance element through fixed resistance RC, simultaneously through fixed capacity C2 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020692258XU CN201966640U (en) | 2010-12-30 | 2010-12-30 | Voltage and current timely feed control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020692258XU CN201966640U (en) | 2010-12-30 | 2010-12-30 | Voltage and current timely feed control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201966640U true CN201966640U (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020692258XU Expired - Fee Related CN201966640U (en) | 2010-12-30 | 2010-12-30 | Voltage and current timely feed control circuit |
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| CN (1) | CN201966640U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097839A (en) * | 2010-12-30 | 2011-06-15 | 天津南大强芯半导体芯片设计有限公司 | Voltage and current adaptive control circuit |
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2010
- 2010-12-30 CN CN201020692258XU patent/CN201966640U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097839A (en) * | 2010-12-30 | 2011-06-15 | 天津南大强芯半导体芯片设计有限公司 | Voltage and current adaptive control circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20121230 |