TW201102778A - Adaptive constant voltage controlling circuit and adaptive power transforming controller - Google Patents

Abstract

An adaptive power transforming controller coupled to a load and a power transforming circuit is provided. The adaptive power transforming controller has an adaptive voltage sensing unit and a transforming control circuit. The adaptive voltage sensing unit is coupled to the load for outputting a voltage sensing signal according to a load current and a load voltage from the load. The transforming control circuit is utilized for receiving the voltage sensing signal and comparing the voltage level of the voltage sensing signal with a current sensing signal, which is corresponding to the load current, so as to decide whether to control the power transforming circuit according to the voltage sensing signal or the current sensing signal.

Description

201102778 VI. Description of the Invention: [Technical Field] The present invention relates to a control circuit and a power conversion controller, and more particularly to an adaptive constant voltage control circuit and an adaptive power conversion controller. [Prior Art] The constant voltage constant current conversion control is often applied to lithium battery charging modules and current-limiting constant voltage regulators (current-limiting constant_voltageregulat〇r).

In the lithium battery charging module, during the charging process of the lithium battery, the lithium battery charging group first passes the constant current control mode, so that the lithium battery is quickly charged during the constant current control period. Subsequently, when the lithium battery voltage level reaches a preset protection value, the lithium battery charging module is further converted into a constant voltage control to clamp the lithium battery voltage level to achieve the purpose of lithium battery protection. In the case of a current limiting regulator, the current limiting regulator uses constant voltage control to reliably control the output load voltage. When the earth load is loaded with the Ronda-employment protection, the current-limit mode _ is changed to the constant current system to ensure the output load current is clamped, and the output (4) current-limiting protection is shown. Figure 1 shows a prior art voltage. The constant current conversion controller 1 is shown in the figure, the constant voltage constant current conversion controller 1 () is connected to a conversion circuit ^ 'this power conversion circuit 11 to supply power to a negative =, 2 - The constant current conversion (4) 111Q has a sensing circuit motor sensing circuit 14, a DC voltage level conversion circuit 151, and a voltage sensing circuit 13 gamma out of the load ϊ i sensing signal v 〇 s. The current sensing circuit 14 detects the input power, and the current senses the signal vcs according to a first reference signal ν〇3 i^CI. The differential amplification circuit 152 receives the voltage sensing s, the current detection reference signal VCI, and a second reference voltage 201102778 signal VR2 to output an error amplification signal vpB. When the level of the voltage sensing signal V0S is higher than the current detecting reference signal, the error amplifying circuit 152 is based on the voltage sensing signal v〇s and the second spring, and the error is amplified into a voltage loop. Control, constant voltage fixed electric miscellaneous control Xiang 1G for constant voltage back to Γ ΐΪίΐΐ signal V〇S < level lower than current detection reference signal ^ f decision amplification circuit 152 based on current detection reference signal VCI fish first east test The voltage weaving VR2 produces the county nickname WB. At this time, the error = ^ is the current return system, the constant voltage constant current conversion continent H 10 is the constant current return control: By this: the target of constant voltage constant current conversion control can be realized. Further, the constant voltage constant current conversion shown in the second H-system_i-th diagram controls the relationship between the voltage and the current of the crying w output. As shown in the figure, when the output current of the fixed ° is close to the upper limit of the current set by the constant current control, the controlled electric pressure is affected by the constant feedback control, causing the load voltage to drop and the error value of the feedback control. The increase affects the output regulation characteristics of the constant voltage constant-change controller 10. < SUMMARY OF THE INVENTION In view of the above problems, the object of the present invention is to provide an adaptive power conversion controller that senses a load voltage and a load current or an input current to generate a voltage sense signal and then compares the voltage sense signal. And a corresponding to the load current 'Μ Μ 彳 彳 5, decided to rely on the current sensing signal or the basis system to achieve adaptive fixed power 敎 electric (4) (four). α Η. To achieve the above object, the present invention provides an adaptive power conversion control t-switch to a load-to-power conversion circuit. The adaptive power conversion system includes an adaptive voltage sensing unit and a conversion control circuit. In the basin, the 2-voltage sensing unit is based on the load current from the load and the 1. ^ H voltage ❹彳 signal. The switching control system rib receives the voltage sensing k and compares the voltage sensing signal with a voltage corresponding to the load current to determine whether the voltage is measured by the money or the signal is controlled according to the control signal. A power conversion circuit provides power to the load. An adaptive power conversion controller that connects a load to an I-electric circuit. The adaptive power conversion controller includes an adaptive voltage ίf t兀/, a two-conversion control circuit. The suitable voltage sensing unit is based on the power supply, the current, the flow of I n and the load from the load - the voltage output - the voltage sense ϊ 二 二 用以 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收 接收a current sensing signal of the current, controlling the power conversion circuit to provide power to the load by a decisive or voltage sensing signal. The invention provides that the adaptive voltage unit includes a h-worm and a first resistance and a first The three resistors are connected to the output end of the power-down circuit and the 唆, and form a circuit loop with the load, wherein the second resistor disk is a voltage sensing signal across the pressing. The cross-voltage of the third resistor is the electric-dt and the other is the case that the current-sensing unit has a fourth resistor, which is connected in series with the voltage across the four resistors. For the current sensing signal. The first voltage control - kind of suitable voltage control (four) way. This adaptive fixed power supply conversion circuit 'and this depends on the conversion circuit of the wheel - two to provide power. This adaptability Voltage control circuit including adaptive voltage . Sensing unit and - a control unit which towel, ίΐίίίϊ adapt to the load L and the load current from the basis of the two load "-ίί disc death: ㈣r ,? f measurement signal. The control unit receives the aforementioned voltage sensing signal ^, vf Ϊ6 signal, and touches the power to the load according to the voltage sense and the reference voltage signal. 1° job system Pressing the appropriate button (4) circuit. This adaptive fixed handle is loaded by the main load. The adaptive fixed electric waste control circuit includes an adaptability 5 201102778 voltage sensing unit and a _ load electric output repeatedly a voltage input current and one from the load and a reference Lai Wei Wei cake sensing signal power conversion circuit Power is turned out. Electric earth sensing station number and reference voltage signal control - step description This description is exemplary, for the sake of advantages, will be described in the following description and the other purposes of the invention and [implementation] In sensing the load cake and load current to generate voltage = corresponding to the load current = - in the embodiment, the switching of functions. In the signal level of the present invention, the _f-bit conversion circuit is used to scale and adjust the current sensing. Fig. 3 is an adaptive power conversion controller of the present invention. Electricity, intention. As shown in the figure, this adaptation ί; = _ then the circuit 33 and - conversion control circuit ^ more than 々 run : connected load and according to the load 22 - VOS. The aforementioned negative 嶋VLOAD is the load 2 = the measured current ILOAD is the current flowing through the load 22. The load-conversion control circuit 35 is configured to receive the aforementioned voltage residuals, compare the electric service test, and the ship is determined according to the current sense signal vcs or the VOS H county enlarges the woven yp 20. to control the power conversion circuit 2 Power to Load 22 Power Conversion Circuit 201102778 In the present embodiment, the conversion control circuit 35 directly draws the current sense signal VCS corresponding to the load current IL〇AD through the adaptive voltage sensing circuit 33. The conversion control circuit 35 outputs at least one error amplification signal VFB according to the received voltage sensing signal V0S, the electrical influenza detection signal VCS and a reference voltage signal VR. Wherein, when the level of the current sensing signal vcs is greater than the level of the voltage sensing signal vos, the switching control circuit 35 outputs the error amplifying signal WB according to the current sensing signal vcs and the reference voltage signal VR. When the level of the current sensing signal VCS is less than the level of the voltage sensing signal v〇s, the switching control circuit 3^ outputs the error amplifying signal VFf according to the electrical double measuring signal v〇 S and the reference electric signal. Thereby, the purpose of constant voltage constant current conversion can be achieved. Next, in the present embodiment, the conversion controller 35 has a level switching circuit 35 and an error amplifying circuit 352. The level conversion circuit 351 receives the current check number VCS, and after the DC voltage level is converted, the output-current detection reference = the number vci. The control point of the constant voltage constant current can be adjusted by changing the level ' of the current sensing signal vcs by the level conversion circuit 351. The error amplifying circuit 3S2 receives the current detecting reference signal να, the voltage sense = VOS, and the - reference voltage signal w to output the error amplifying signal VFB. Into the step to say 'When the voltage sensing letter? Tiger v〇s silk words confession

The controller 30 is controlled by constant current feedback. In this way, the goal of real current conversion control can be achieved. '

An embodiment is coupled to a third resistor R3. These three resistors 7 201102778 R1, R2, R3 are connected into a resistor string. One end of the resistor string is coupled to the output terminal OUT of the power conversion circuit 20, and the other end is coupled to the ground terminal G' of the load 22 to form a circuit loop with the load 32. The ground terminal G of the load 22 is different from the ground terminal (not shown) of the power conversion circuit 20. The voltage sensing signal v〇s is the voltage across the second resistor R2 and the third resistor R3. The contact between the second resistor and the third resistor R3 is coupled to the input voltage of the power conversion circuit 20. By appropriately adjusting the current loop of the input current and the output current of the power conversion circuit .20, the input current IIN of the power conversion circuit 20 or the load current ILOAD from the load can flow through the third resistor R3. In the case where the input current IIN of the power conversion circuit 20 flows through the third resistor R3, the current sensing signal VCS is the voltage across the third resistor R3 of the aforementioned adaptive voltage sensing circuit 33. The voltage across the voltage resistor VC of the third resistor R3 has a proportional relationship with the load current ILOAD. The relationship is: VCS = r3xIIN = r3xILOADx FL0^~FSS (1)

VIN-VSS IN...W where τ3 is the resistance value of the third resistor R3. VIN is the input voltage of the power conversion circuit 20, vssjnsi is the ground voltage of the power conversion circuit 2〇, VSS is Refers to the ground terminal voltage of load 22. By using the voltage dividing function of the resistor string, the voltage sensing signal VOS (V0S = V0SP-V0SN) can be proportional to the load voltage VLOAD and the load current ILOAD. The relationship is: (VLOAD-VSS). 1 + r\ ^(vosp-vosn)·

R3 x ILOAD x VLOAD-VSS VIN-VSS IN — / (2) where ' rl and r2 are the resistance values of the first resistor R1 and the second resistor R2, respectively. The foregoing equations (1) and (2) are cases where the power conversion circuit 20 performs buck conversion. It can be found from the formula that the voltage sensing signal VOS is a function of the load voltage VLOAD and the load current ILOAD, and the current sensing signal No. 201102778 VCS is the load current! Load function. This function relationship is still true in the case of boost (b〇〇st) conversion, buck-boost conversion, and the like. Therefore, the concept of the present invention can also be applied to other types of power conversion, such as boost conversion, buck-boost conversion, and the like. ' ^ The case where the load current ILOAD from the load flows through the third resistor R3 ^ The current sense signal VCS is the voltage across the third resistor R3 of the aforementioned adaptive voltage sensing circuit 33. The voltage across the voltage vcs of the third resistor R3 has a proportional relationship with the load current ILOAD. The relationship is: VCS = r3xIL0AD......(3)

Where r3 is the resistance value of the third resistor R3. By using the voltage dividing function of the resistor string, the voltage sensing signal VOS (V〇S = VOSP_VOSN) can be caused to have a certain scaling relationship with the load voltage and the load current ILOAD. The relationship is: (Helping Thai called [1+咅] (腑-read) + [*>3χ/狮)... (4) where ^ and ^ are the first resistance illusion and the second resistance illusion resistance

Then, the equation (3) and the equation (Hu) are changed for the power conversion circuit 2〇. From the formula towel, the voltage _ signal V 〇 S and the load current 1 function, the current sense signal Γ ' 载 load current ribs a function. This function relationship is established in the case of boost (b〇_ = change 'ups and downs (bUCk_boos_奂, etc.), so it can also be applied to other types of power conversion, such as boost conversion, boosting, and the fifth aspect shows the present invention. The adaptive power conversion is controlled by 3G. For example, the same part as the adaptive power conversion season shown in Figure 3 is omitted. As shown in the figure, the adaptive power conversion control is adaptive. In addition to the voltage sensing circuit 33, there is also a current sensing. The current sensing circuit 34 has a fourth resistor R4, which is connected in series. The strong input (4) (10) read. The domain ^ 贞 9 201102778 is the first through the electrical subtraction After Wei 34 and then flow through the load 22

VCS is the pressure of the first kiss. Current sensing signal vcs two. The relationship of J current IL0AJD is: rCS = r4x/La4Z). Among them, r4 means 筮 resistance. In the actual circuit configuration, in order to avoid the current sense, the level of the VCS exceeds the processing range of the conversion controller 35, and the current can flow through the load 22 and then flow through the current sensing circuit 34 to the ground = ' That is, the current sensing circuit % is connected in series between the load 22 and the ground terminal G ^ . <定雪^ ΐ iiiJ The voltage-current relationship w which is output by the electric power W conversion by the adaptive power conversion controller 30 of the present invention. Since the present invention measures the load voltage and the load i stream, the error amplification is increased by the rise of the load. In this Tan New, the error amplification signal VFB outputted by the amplification circuit 352 is inverted by 6 electric power. Therefore, it can be overcome that in Fig. 2, the characteristics of the pressing surface of the control of the constant current and the current control are subject to constant power f(four)m. In addition, as shown in Fig. 3, in practical application, the circuit is supplied to the load 22 through a battery age. Please use the grounding terminal (not shown) of the source conversion circuit 2G during the j-transfer process because the implementation ===: adaptive constant voltage control circuit. - better to connect to - electric ^ change 3 ^ shown 'this The adaptive constant voltage control circuit 40 is coupled to the load 22. The output of the power conversion circuit 20 of this temple (10) is electrically _ then a single L f / 4f = circuit 40 has an adaptation ILOAD and -f and according to the load from the load 22 - load current load county VLOAD output 1 test signal 201102778 - The error is output to the level of the electric castle). The control unit 45 has a spotted test 52. The control unit 45 receives the voltage sensing signal V0S signal w = # and = the electric f sensing signal and the reference power repeatedly signal to the power conversion circuit 2 〇. 34 is merely a preferred embodiment of the present invention, and is not intended to cover the scope of the invention. (4) is a patent of the present invention. The scope of the present invention or the scope of the patent application is not required and the title is only used. In addition, the summary section of the rights section. The use of special j file search *, and _ to limit the invention [simplified description of the figure] schematic diagram of the current conversion controller. The relationship between the voltage and the current is the output of the control output of the current control controller. 3 is an adaptive power conversion controller of the present invention - a schematic diagram of a preferred embodiment is a schematic diagram of a preferred embodiment of the adaptive sensing circuit of FIG. 3 纽 功率 功率 控制 控制 控制 控制 ― ― ― ― Figure and 7b_本(四) Adapted to the mosquito (4) rail-health example [Main component symbol description] Constant voltage constant current conversion controller 10 Power conversion circuit]] 201102778 Load 12 voltage sensing circuit 13 Current sensing circuit 14 DC voltage standard Bit conversion circuit 151 error amplification circuit 152 load 22 power conversion circuit 20 adaptive power conversion controller 30 adaptive voltage sensing circuit 33 current sensing circuit 34 conversion control circuit 35 level conversion circuit 351 error amplification circuit 352 adaptive constant voltage Control circuit 40 adaptive voltage sensing unit 43 control unit 45 error amplifying circuit 452 voltage sensing signal VOS current detecting signal VCS first reference voltage signal VR1 current detecting reference signal VCI second reference voltage signal VR2 error amplifying signal VFB load current ILOAD Load voltage VLOAD Reference voltage signal VR First resistor R1 Second resistor R2 Third resistor R3 Fourth resistor R4 201102778

Output of the power conversion circuit OUT Ground of the load G Input voltage of the power conversion circuit VIN Output voltage of the power conversion circuit VOUT Ground voltage of the power conversion circuit VSS_IN Ground voltage of the load VSS Input current IIN of the power conversion circuit

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Claims (1)

201102778 VII. Patent application scope: 1. An adaptive power conversion controller, _ to - load I circuit, the adaptive power conversion control crying includes, power conversion, adaptive voltage sensing unit, basis; self-loading voltage Outputting a voltage sensing signal; and, a motor and a negative-intelligent control circuit, receiving the voltage sensing signal, and comparing the signal with a current sensing signal corresponding to the load current, with a 1 or a The voltage sensing signal controls the power conversion circuit to adjust the adaptive power conversion controller of the second item, in the basin, the resistance string is divided into the brain _ ^• the f ^ resistance string, the load - chest, 峨Negative 3. If you apply for patents, the second item, &amp; bribe second electric _ the first ^ ^ where ' 4. If you apply for patent supplement 2 / the current sensing signal is equal to the third resistance cross The pressure sheep is switched to the control station. Among them, = as in the fourth paragraph of the patent application scope, the cross voltage and the load current have the first one, and the end is electrically connected to the second resistor. The conversion circuit is outputted to the other end of the i-th conversion controller, wherein, the power conversion circuit is connected to the conversion control power it:! the second function: the conversion controller' where the signal level is compared with the voltage after adjustment The current sensing, . The level of the tiger is to output the error to amplify the signal. 201102778 - The current sensing unit is dry-changed controller, and further includes a load and a ground. And a fourth electric nozzle connected in series with the first current sense alcohol element, the object area measuring 11, and further comprising the output end of the power conversion circuit and the load. The four-chirped 'in series with the η. - an adaptive fixed cake control circuit 2: the output of the power conversion circuit is coupled: a ^ to: conversion circuit, the circuit includes: 贞 load 'the adaptive constant voltage control - An adaptive electric sensing unit, the adaptive load, and based on one negative load from the load, is transferred to the negative sensing signal; and the bellows and the load voltage output a voltage-control unit receives the voltage Sense signal _ = pressure sensing signal and the reference voltage signal control the power; = road = two of them, = way to: resistance = two ends respectively f "two to the power conversion circuit - the ground. The three electric i cross (four) peach, in which the '14-connected, _ &gt; 1 t load current has a proportional relationship. The more powerful power conversion controller 'transfer to - load disk - power Han switch circuit, the adaptive power The conversion controller includes a paper, a power conversion unit 'outputs a voltage sensing signal according to one of the power conversion circuits, and a signal and a pair; and the pressure sensing signal compares the voltage to sense the influenza test signal. Current sensing signal to determine the basis The voltage sensing signal controls the power conversion circuit to supply power 15 201102778 to the load. 15. = Adaptive power conversion of claim 14 of the patent scope. The adaptive voltage sensing unit includes a first, . =, the resistance, the first resistance, the second resistance, and the third three-source conversion circuit - the input light is connected to the electrical resistance. The grounding of the ground ^ 'the input current flows through The third 16.t application. The patented range of the fifth aspect of the adaptive two-resistance and the third resistor with the current sense is difficult to convert the controller, wherein the conversion raw power conversion controller, wherein, a level, and a loopback 2 circuit for adjusting the level of the current sensing signal and the current sensing-current sensing unit adjusted by the voltage, the rate conversion controller, Between the load and a ground terminal, ~, J early 70 has a fourth resistor, connected in series with the rate conversion controller, and further includes a turn-to-turn, the output terminal and the negative fourth resistor are connected in series to the power supply. Conversion: _= to; power conversion circuit, the member carries The adaptive constant voltage control 201102778 circuit comprises: an adaptive unit, the adaptive electric two-input current and the adaptive 24-cell circuit, such as the patent Sutudi, wherein the resistor is connected in series to form a resistor string. , the output terminals of the second resistor and the third circuit are respectively connected to the two ends of the stray string, and the power supply is coupled to the ground of the second resistor 盥, the voltage sensing. The signal system is connected to the contact point of the resistor. The second resistor and the third electrical input current flow through the ground terminal of the input voltage of the third resistor 奂 circuit. The cross-voltage of the third resistor and the adaptive constant voltage control circuit of the white one, wherein. One of the load currents has a proportional