TWI333316B - Voltage regulator and related electronic device for sensing an input voltage via a multiplex pin of a linear voltage controller - Google Patents

Description

1333316 IX. Description of the Invention: [Technical Field] The present invention provides a power converter that utilizes a voltage controller multiplex pin to detect an input ink, and in particular, an output coupled to a voltage controller through adjustment The first electronic component of the pin and the second electronic component detect the input voltage of the power converter. [Prior Art] • The Voltage Regulator can be divided into two types: Switching Regulator and Linear Regulator. Linear converters are faster, easier to use, and less expensive, but are inefficient and typically consume 50% of the power. The efficiency of the switching converter is higher than that of the linear converter, but the design is more complicated and slow, and it is easy to derive electromagnetic interference. In general, when using a linear power converter, two sets of input power are required, _ a set of control power supplies that provide a control circuit (contr〇l Circuitry) (c(10) ratio ^

Voltage ' VCNTL) ' and the other set is the main power supply Voltage' that provides voltage conversion). In order to detect the two sets of input power, it is often necessary to use another pin to connect to the main power supply to change the main power supply, so as to avoid the problem that the system does not start up due to the difference of the two power input sequences. Λ β Refer to Figure 1, which is a schematic diagram of the prior art-power conversion H 1G. The power converter 10 includes an ink controller 110 and a power wheel stage 120. The voltage control can receive a feedback signal FB and an input voltage through a first input pin 112, a second input pin 7 1333316 114, a third input pin 116 and an output pin 118, respectively. Vin, a control voltage VCNTL 'and a drive signal DRV. The input voltage Vin is generated by a power supply for providing a main power supply for the voltage conversion of the power converter 10, and the control voltage VCNTL is for supplying the operating power of the driving voltage controller 110. The voltage controller 110 generates a driving signal DRV' based on the feedback signal FB, which further includes an error amplifier 13A and a comparator 140. The error amplifier 130 receives the feedback signal FB and a reference voltage VREF through a first input terminal 132 and a second input terminal 134, and is driven by an output terminal 136 according to the result of comparing the feedback signal FB with the reference voltage Vref. Signal DRV. The comparator 140 includes a first input terminal 142, a second input terminal 144, and an output terminal 146. The first input terminal 142 is connected to the contacts of the two resistors and r22 for receiving the voltage across the two resistors Ru and Ru. The latter voltage V2; the second input terminal 144 is configured to receive a first threshold voltage VTH; and the output terminal 140 is configured to output a comparison result to drive the power converter ίο. The comparator mo is used to compare the voltages of the voltage 乂2 with the first threshold voltage Vth, wherein the 'voltage V2' can be obtained by the following formula: v2= Please refer to FIG. The power output stage 12A includes a switch Q, a first resistor R!, a second resistor R2, a load L〇ad, a first capacitor Ci, and a second capacitor C2. The switch Q1 includes a control terminal 122, a first terminal 124 and a second terminal 126. The control terminal 122 is coupled to the output pin 118 of the voltage controller 11 for receiving the driving signal DRV. Used to receive input 赖 V 8 1333316 two-terminal system used for output-output voltage Vgut. The first resistor R is coupled between the second terminal 126 of the switch Q1 and the first input pin 112 of the voltage controller 11 , and the second resistor R2 is reduced in series to the first resistor R! Between the ground. The output voltage v0UT generates a feedback signal to the first input pin 112 of the voltage controller 110 after the first resistor Ri and the second resistor & Next, the voltage controller 11 generates a driving signal DRV according to the feedback signal FB, and sends it to the switch Q1 to control its opening and closing. Finally, the power converter 1 转换 converts the input voltage VlN into an output 赖 ν τ through the power output stage 12 〇 (switching on and off). The second capacitor ac is connected between the second end 126 of the switch Q1 and the ground end, and the second capacitor a is coupled to the switch. The second end 126 of Q1 is between the ground end. Due to the cost considerations and the number of integrated and listening pins, there is usually no extra pin to the side of the VlN size. Reference Figure 2, Figure 2 is a schematic diagram of the prior art - power converter 2 . The power converter 2A includes a voltage controller 21G and a power output stage 22A. Please note that the power output stage 22〇 and the power output stage 12〇 in Fig. 1 have the same function and the same position in the same name, and will not be repeated here. The voltage controller 21 receives the feedback signal FB and the control voltage VCNTL ' through a first input pin 212 and a second input pin 216 to generate a driving signal DRv according to the feedback signal 4 and through an output pin 218. The drive signal DRV is output. The voltage controller 21 is similar to the voltage controller 110 in the figure, except that the ink controller 21 does not additionally use a pin to detect the voltage level of the input voltage. In addition, the voltage controller plus 9 1333316 ✓ also includes - error amplifier 230, its function and consumption method and the first! The error amplifier 130 in the figure is the same, based on the comparison feedback signal! ^ The result of the reference voltage is used to generate the drive signal DRV. Since the voltage control H 21〇 does not use an additional pin to detect the voltage of the input voltage Vin, the rising slope of the output voltage νουτ is not controlled and does not provide the function of the system soft start (Soft Start). Or it is necessary to have special requirements on the input power sequence (ρ〇· • S-) to avoid the problem that the system cannot start normally. As a result, many application restrictions will be added. In the above example, the voltage controller 11 The second input pin 114 is used to receive the input power and its size, so that the power converter 1 can provide the function of the system soft start. However, the number and cost of the integrated circuit package pins are also Relatively improved. Based on cost considerations, the voltage controller 21 rejects the use of additional pins to laterally input the voltage level of the human voltage Vin, but adds many restrictions to the application. [Invention] Accordingly, the present invention The main purpose of the invention is to provide a power converter and a related electronic device using the voltage controller output pin to generate a human voltage. The invention discloses a source conversion using a voltage controller output pin to detect an input voltage. The power conversion|| is used to convert one of the power supply input 1333316 into an output voltage, which includes - voltage control (four), - power The output stage and the voltage detecting circuit include: the input pin is configured to receive a return Λ and the evening work pin is configured to output a driving signal, and the voltage controller generates a dynamism according to the feedback The power output stage is subtracted from the power supply and the voltage control for converting the input voltage into the output according to the driving signal, and generating the feedback signal to the voltage control [the electric (four) measurement a voltage level of the input side of the circuit, comprising: a first electronic component, a second electronic component, and a comparator. The first electronic component is coupled to the power supply and the voltage controller The second electronic component is lightly connected between the output lion and the ground of the voltage control H. When the voltage measurement circuit is activated, the multiplex pin of the voltage control II does not output the Driving the signal, and maintaining the impedance, although the multiplexed pin of the 5 Hz voltage controller normally outputs the driving signal, the electrical measuring circuit does not operate. The comparison II includes a __ input end face connected to the voltage control Output pin for receiving The input related signal associated with the input voltage, a second input for receiving a threshold voltage, and an output for outputting a comparison result to drive the power converter. The comparator is for comparing the input correlation And the magnitude of the voltage of the input signal and the input voltage can be obtained by adjusting the first electronic component and the second electronic component. In an embodiment of the present invention, The voltage controller is an integrated circuit, and the second electronic component is disposed inside the integrated circuit or outside the integrated circuit. 11 1333316 In an embodiment of the invention, the first electronic component In one embodiment of the invention, the second electronic component is a resistor. In one embodiment of the invention, the second electronic component is a current source. In the example, the comparator is a voltage comparator or a current comparator. The present invention discloses an electronic device in which a paste voltage is controlled to output a pin to a voltage. The electronic device includes a voltage control (four) and a voltage side circuit. The voltage controller includes a - receive signal to receive - feedback signals, and - a multiplex pin for output - drive signals. The voltage control generates the driving signal according to the feedback signal. The voltage detecting circuit side detects the voltage of one input voltage provided by the power supply, and the voltage includes a first electronic tree, a second electronic component, and a fourth electronic component is connected to the power supply. The supply is between the multiplexed pin of the voltage controller. The second electronic component is connected between the J pin of the face controller and the ground. When the voltage detecting circuit operates, there are many controllers: the pin does not output the driving signal and maintains high impedance; when the voltage controller drives more signals, the voltage detecting circuit does not operate. The comparison spot 2 = the multiplex pin of the voltage controller, used to receive the input can be simple _ 亀 her 胄, m tenderly received a 12 丄, 16

The Sa boundary voltage, and an output, are used to output a comparison result to drive the electronic device. The comparator is configured to compare the voltage of the input related signal with the threshold voltage. The voltage of the input correlation signal and the wheel-in voltage can be obtained by adjusting the first electronic component and the second electronic component. In an embodiment of the invention, the voltage controller is an integrated circuit and the second electronic component is hidden in the fourth circuit of the integrated circuit or outside the integrated circuit. The first electronic component is a resistor. In an embodiment of the invention, the second electronic component is a resistor. % In one embodiment of the invention, the second electronic component is a current source. In an embodiment of the invention, the comparator is a voltage comparator or a current comparator. [Embodiment] - Please refer to Fig. 3'. Fig. 3 is a schematic diagram of a power converter of the present invention - the first embodiment. The power converter 30 includes a voltage controller 310, a power output stage 320, and a voltage side circuit 380. The power wheel stage 320 includes a -switch φ, a first resistor R1, a second resistor R2, a load load, a -capacitor core 13 1333316, and a second capacitor 〇2. Please note that the power output stage 32A and the power output stage 120 in Fig. 1 have the same function and the same position in the same name, and will not be repeated here. The power converter 30 can convert the input voltage ViN into an output voltage 〇1^ through the power output stage 32() (the switch 开启 is turned on and off). The voltage controller 310 receives a feedback signal FBI and a control voltage VCNTL through a first input pin 312 and a second input pin 316 to generate a driving signal DRV1 according to the feedback signal FBI, and through a multi-join The pin 318 outputs a drive signal DRV1. The input voltage VrN is generated by a power supply for providing a main power supply for voltage conversion of the power converter 30, and the control voltage VCNTL is for supplying the operating power of the voltage controller 310. In addition, the voltage controller 31 further includes an error amplifier 330' for generating the driving signal DRV1 based on the result of comparing the feedback signal FBI with the reference voltage VREF1. The error amplifier 330 includes a first input terminal 332, a second input terminal 334 and an output terminal 136 for receiving the feedback signal FB, a reference voltage VreF, and the output driving signal DRV. Please continue to refer to FIG. . The voltage detecting circuit 380 includes a first electronic component I, a second electronic component 350, and a comparator 340. In the present embodiment, the first electronic component R3 is a resistor, and the second electronic component 350 is a pull-low current source, which provides a current of 1 丨. The first electronic component R3 is coupled between the power supply (to generate the input voltage Vin) and the multiplex pin 318 of the voltage controller 310. The second electronic component 350 is coupled between the multiplexer pin 318 of the voltage controller 310 and a ground terminal. The comparator 340 is configured to compare the voltage of an input phase 14 1333316 and a threshold voltage Vthi to generate a comparison result. The comparator 340 includes a first input terminal 342, a second input terminal 344, and a wheel output terminal 346. The first input terminal 342 is coupled to the multiplex pin 318 of the voltage controller 310 for receiving the input correlation nickname V3; the second input terminal 344 is configured to receive the threshold voltage γ ΤΗ 1; and the output terminal 346 is configured to output the comparison result. Since the drive power converter 3 〇. The voltage detecting circuit 380 is used for detecting the voltage of the input voltage VlN, and the input related signal V3 is related to the input voltage ViN. The relationship between the two can be obtained by the following formula: = Vjn - R3 XI] The invention can adjust the voltage value of the input voltage Vw by adjusting the resistance value of the first electronic component core and the current ^, and the result can be detected by the power-on reset detection (e〇wer on Reset) voltage controller 310. You can judge the input based on the detection result.

The electric dust is critical, and then the start of the recording is started and the output voltage Vout is generated. Please note that when the electric tree test circuit is operated alone, the voltage controller 31 does not output the drive 峨DRV1 and maintains the high flop (ffighImped). At this time, the voltage of the multiplex pin 318 is not expensive.| The influence of the voltage detection circuit is not fine when the voltage controller · ^ often outputs the drive signal DRV1. Please note that when the voltage detection circuit 380 is activated, the controller 31 is used to receive the input side signal %, and the voltage of the input voltage VlN is used. At this time, the multiplex pin 318 of the light controller 310 normal actuator 3H) is used to output the driving signal i. In the present example, the voltage controller 31 驱动 drive signal DRV1 to power output stage 32 〇 can be used to output the main sheep output stage 320, and can be used to detect the input double 15

The voltage of VlN is a pin with multiple functions (Multiple Functi〇n). In the present invention, the comparator 340 is a voltage comparator, but is not limited thereto, and may be other types of comparators. The switch Q1 can be a Metal-Oxide Semiconductor Transistor (MOS), a Bipolar Junction Transistor (BJT) or other electronic components having the same function. The voltage controller 310 is an integrated circuit (1 circuit), and the first electronic component & is disposed outside the voltage controller 31, and the resistance value can be adjusted by the user; the second electron The component 350 is disposed inside the voltage controller 31, and the current supplied is a preset value. Therefore, the voltage of the driving signal DRV and the input voltage VlN can be adjusted by adjusting the first electronic component & The value is) and the second electronic component 350 (adjusted current value). However, the above-described embodiments are only for explaining the concept of the present invention, and are not intended to limit the practical application of the present invention. In addition, the second electronic component The 35G is not limited to a pull-down current source, but may be a resistor or other electronic secret: and the second electronic cultivator 35() may also be disposed outside the integrated circuit. μ Refer to Figure 4, and Figure 4 is A schematic diagram of a power converter 4 of the second embodiment of the present invention includes a voltage controller 41A, a power output stage, and a voltage detection circuit 480. Please note that the power converter 4G and the power converter of FIG. Class 30 The same name component corresponds to the same function and the same position, and will not be repeated here. The difference between the two is that the second electronic component used in the voltage detecting circuit 48 is - resistance ~ - input related signal % miscellaneous The relationship between the two people, the two 1333316 can be obtained by the following formula: v4= R3+R4 xVn 凊Note 'When the voltage detection circuit 480 is activated, the dragon controller 410 does not output the drive signal surface and maintains high impedance. At this time, the voltage of the multiplexed pin is not affected by the error of 1 amplification. When the voltage is controlled, please output the drive signal and the circuit will not operate. Please note that when the voltage detection circuit is activated, the detector is biased. 4K) The multi-pin is used to receive the wheel-in correlation signal %' to detect the voltage of the input voltage VlN; and when the power--the circuit is completely stopped (the voltage controller is operating normally), the voltage controller is too much. The work is used to output the drive signal DRV1. dad'

K R3 + K Please refer to FIG. 5 , which is a schematic diagram of a power converter % according to a third embodiment of the present invention. The structure of the power converter 50 is similar to that of the fourth power conversion, except that the resistor R4U is disposed outside the integrated circuit, and the relationship between the wheeled power S VrN and the input related signal V4 can be determined by the following formula. Get it · V4:

:V,N In Figure 4 and Figure 5, after the input voltage ViN passes through the resistor core and the heart, the input signal V4 can be obtained. By adjusting the resistance value of & and 仏, the input side can be adjusted. The signal v4, and then the input voltage can be used for the foot_set, and the W__ can determine the time when the input voltage Vn^ reaches the critical point according to the detection result, thereby determining to start the soft start and generate the round out. Voltage V〇UT. Please refer to FIG. 6. FIG. 6 is a schematic diagram of a power converter 60 according to a fourth embodiment of the present invention, which includes a voltage controller 610, a power output stage 620, and a voltage price measuring circuit 680. Fig. 6 is a variation of the power converter 30 in Fig. 3. The difference between the two is that the comparator 640 used by the voltage detecting circuit 680 is a current comparator. The comparator 640 includes a first input terminal 642, a second input port 644, and an output terminal 646. The first input terminal 642 is coupled to the multiplex pin 618 of the voltage controller 610 for receiving inflow multiplex connections. The current ISEN1 of the pin 618; the second input 644644 is used to receive a critical current ΙτΗι; the output 646 is used to output a comparison result to drive the electrical conversion! I 6 〇. Xiao H _ is the current of the wire current ^ leg and the boundary current Iim. By adjusting the input correlation of the multiplexer pin 618 of the voltage controller 61, the % of the voltage is close to the voltage set internally by the voltage controller 61 (V5 can be 0V), then the voltage controller flows through the resistor & The current iSENi of the multiplex pin 618 of (10) can be obtained by the following formula:

Therefore, by adjusting the resistance value of R3, the equation can be used; Efe 7 occupies: Λ one can obtain the current ISEN1 ’ and utilizes the above

Reset the criticality and do the output voltage V0UT. Please note that the voltage controller 610 does not turn out the driving information, 1333316 DRVl, and maintain the south impedance, at this time the multiplexed (10) voltage is not affected by the error amplification of the scene / 曰 'Tian electric repeated controller 61 〇 normal round When the driving signal is kicked, the electric circuit 680 does not operate. It is also expected that when the light circuit _ action, the multiplex pin 618 of the electric C control 610 is used to receive the input related signal %, and the _ input county VlN light size; and when the electric detection circuit 68 〇 When the operation is stopped (at this time, the voltage controller 61 is operating normally), the multi-function communication (10) of the controller (10) is used to output the drive signal DRV1. The above described embodiments are only for the purpose of the present invention and are not intended to limit the scope of the invention. The comparator mentioned in the text may be an electric ship comparator or a current comparator, but is not limited thereto, and may be other types of comparators. The switch (7) can be a gold oxide semi-transistor, a double junction transistor or other electronic component. Please note that the -electronic component can be a resistor or a current source, or other electronic components. Further, the second electronic component may be disposed inside the integrated circuit or outside the integrated circuit #. The resistance R], R2, 仏, and hua, mentioned in the text are not limited to a fixed value, and can be used by the user. Similarly, the above reference ν, the critical voltage vTH1, and the critical current ΙτΗ1 are not limited to a certain fixed value, and can be adjusted according to the needs of the user. The above-mentioned input related signals V3, % can be adjusted by changing the above-mentioned resistors R3, R4, the threshold voltage vrai, and the critical current ΙΐΉι. However, the above-described embodiments are merely illustrative of the present invention and are not intended to limit the actual application of the present invention, and other applications are intended to be within the scope of the present invention. As can be seen from the above, the present invention provides a power converter that uses a voltage controller multiplex pin to detect 1333316, an input voltage, and its associated (four) arrangement. In the multi-reading financial department of the invention, such as 'transfer DRV1 to _ output level, and can be used to detect and input voltage to enter the county to enter the county ~ view size, the input side of the input, and then Know that your horse has a multiplexed function. The first ray and the second electronic tree _ the voltage control followed by the multiplex pin, the thin resistance value and the electric W to detect the wheel power (4)

2 The result can be _ touch «set, dragon _ can be based on the time when the input voltage reaches the critical point. Shi Shuang nn and then decided to start a soft start and generate dust. UT The power supply provided by the invention _, not the function of the soft start function 'and does not need to increase borrowing, φ,, brother soft start, U / pin to detect the turn-on voltage % of electricity' makes the integrated circuit Domain fineness and cost can be low and can reduce application constraints.

[Simple description of the diagram] Figure 1 is a schematic diagram of the wire technology-power converter. Figure 2 is a schematic diagram of the prior art - power converter. The invention is a schematic diagram of a power converter of the first embodiment. The figure is a schematic view of the invention - a second embodiment - a power converter. Figure S is a schematic view of a power converter according to the third embodiment of the present invention. Fig. 6 is a view showing the -f source conversion H of the fourth embodiment of the present invention. 20 1333316

[Main component symbol description] 10, 20,: 30, 40, 50, 60 power converter 110, 210, 310, 410, 610 voltage controller 120, 220, 320, 420, 620 power output stage 380, 480 voltage detection Measuring circuit Q1 Switch Load 122 Control terminal 124 First terminal 126 Second terminal Ri First resistor r2 Second resistor Ci First capacitor c2 Second capacitor ViN Input voltage V〇UT Output voltage VCNTL Control voltage v2, v5 Voltage v3, V4 input related signal VTH ' Vthi Vref ' VREfi

Ii ' IsENl 112, 212, 312 114, 216, 316, 618 116 118, 218 Threshold Voltage Reference Voltage Current First Input Pin Second Input Pin Third Input Pin Output Pin 21 1333316 318 , 618 DRV, DRV1 FB ' FBI Ru ' Ri2 ' R4 R3 350 130, 230, 330 140, 340, 640 132, 142, 332, 342, 642 134, 144, 334, 344, 644 136, 146, 336, 346, 646 Foot drive signal feedback signal resistance first electronic component second electronic component error amplifier comparator first input terminal second input terminal output terminal

twenty two

Claims (1)

1333316 X. Patent application scope: 1 · Use the voltage controller (Voltage Controller) multiplex pin to measure the input voltage H (Voltage Regulator), and then input one of the provided The voltage is converted into an output voltage, and the power converter comprises: - a voltage control (4), comprising: an input pin for receiving a __ feedback signal, and a multiplex pin for outputting a driving signal, The voltage controller generates the driving signal according to the feedback signal; a power output stage coupled to the power supply and the voltage controller for converting the input voltage into the output voltage according to the driving signal, and Generating the feedback signal to the voltage controller; and a voltage detecting circuit for detecting the voltage level of the input voltage, comprising: a first electronic component coupled to the power supply and the voltage control Between the multiplexed pins of the device; a second electronic component coupled between the output pin of the voltage controller and a ground terminal; and a comparator 'which includes a first input terminal' The multiplexer pin connected to the voltage controller is configured to receive an input related signal, a second input terminal is configured to receive a threshold voltage, and an output terminal is configured to output a comparison result to drive the power converter The comparator is configured to compare the voltage of the input related signal and the threshold voltage; wherein the voltage of the input related signal and the input voltage can be adjusted by adjusting the first electronic component and the second electronic component. . The power converter of claim 1, wherein the input related signal is related to the input voltage. 3. The power converter of claim 1, wherein: when the voltage detecting circuit operates, the multiplex pin of the voltage controller does not output the driving signal and maintains a high impedance; and when the voltage When the multiplex pin of the controller outputs the drive signal normally, the voltage detection circuit does not operate. 4. For example, in the power converter of claim 1, the voltage controller is an integrated circuit (1C). 5. The power converter of claim 4, wherein the second electronic component is disposed inside the integrated circuit. 6. The power converter of claim 4, wherein the second electronic component is disposed outside the integrated circuit. 7. The power supply device of claim 1, further comprising an error amplifier disposed in the voltage controller, the error amplifier comprising a first input for receiving the feedback signal, The second input terminal is configured to receive a reference voltage, and the output terminal is configured to output the driving signal. The error amplifier is configured to generate the driving signal according to comparing the feedback signal with the result of the reference voltage. The power converter of claim 1, wherein the power wheel output stage comprises: a switch, comprising a control end for receiving the driving signal, and a first end for receiving The input voltage, and a second end, for outputting the turn-off voltage, the open relationship is controlled to be turned on and off according to the voltage of the driving signal; a first resistor coupled to the second end of the switch Between the feedback signals; and a second resistor 'coupled in series between the first resistor and the ground. 9. The power converter of claim 8, wherein the relationship is a Metal-Oxide Semiconductor Transistor (MOS) or The power converter according to claim 8 of the patent application, further comprising: -, the second end of the load is not between the ground ends; the first valley is transferred to the first of the switch Between the end and the ground; and a second capacitor 'wheel between the second end of the switch and the ground end. The first electronic component, wherein the second electronic component:::::: the power converter 12 according to item 1. The power converter 25 1333316 according to the claim A resistor. I3. For the application of the electric hybrid brain described in (4), the second electronic component is a current source. 1 "The power converter ^ as described in the _j range _j range, the comparator is a voltage comparator or a current comparator. 1 ___ (VGltageCGntrGller) multi-I pin to the side of the input voltage electronic device, the electronic device includes: a battery controller 'which contains - input pin, for receiving - feedback signal, and more than one a pin for outputting a driving signal, the voltage controller is configured to generate the driving signal according to the feedback signal; and - the voltage system, the wire voltage, the wire voltage, the voltage of the input voltage, The first electronic component is coupled between the power supply and the multiplexed pin of the voltage controller; a second electronic component coupled to the output pin of the voltage controller and the And a comparator, comprising a first input end coupled to the multiplexed pin of the voltage controller for receiving an input related signal, and a second input for receiving a threshold a voltage, and an output terminal for outputting a comparison result to drive the electronic device. The comparator is configured to compare 26 the voltage of the input related signal with the threshold voltage; wherein the input signal and the wheel The size of the incoming battery can be selected by adjusting the first electronic component 'the second electronic component. The electronic device of claim 15, wherein the input related signal is related to the input voltage. The electronic device of claim 15, wherein: when the voltage_circuit operates, the motor continues to output the driving signal and maintains a high impedance; and when the voltage controller The voltage detection circuit does not operate when the multi-boot pin normally rotates the drive signal. 8. The electronic device of claim 15, wherein the controller is an integrated circuit (IC). 19. The electronic device of claim 18, wherein the second electronic component is placed in the _body circuit (10) or disposed outside the integrated circuit. The electronic device of claim 15 is further characterized in that the error device is placed in the electric castle controller, and the error amplifier includes a first input terminal, and the driver receives: the feedback signal a second input terminal for receiving a reference voltage, and an output terminal for rotating the driving signal, wherein the error amplifier is configured to generate the driving signal according to a comparison result between the 27 1333316 feedback signal and the reference voltage . 21. The electronic device of claim 15, wherein the first electronic component is a resistor. 22. The electronic device of claim 15, wherein the second electronic component is a resistor. 23. The electronic device of claim 15, wherein the second electronic component is a current source. 24. The electronic device of claim 15, wherein the comparator is an electrical comparator or a current comparator. 28