TW564339B - Voltage stabilization circuit - Google Patents

Abstract

A voltage stabilization circuit is disclosed in the present invention, which includes: an energy storage apparatus for storing electricity provided from a first external power source; a feedback apparatus for outputting feedback signal; a control chip for controlling charge/discharge of any apparatus with respect to the energy storage apparatus based on the feedback signal; a load apparatus for outputting an output voltage; and a sensing apparatus, which is turned off to stop charging the load apparatus when outputting the corresponding status signal based on the relationship between the output voltage and the first reference voltage as well as the second reference voltage, which is used as a voltage-varied load apparatus when receiving the second status signal, and which is used to supply output voltage to the load apparatus when receiving the third status signal.

Description

564339 V. Description of the invention (1) The present invention relates to a voltage stabilizing circuit of a switching power supply for voltage stabilizing lightning. Please don't worry about a kind of operation. Please refer to Figure 1, Figure 1 is about the structure of the hair. The following is the description of the switching power supply control chip 11 respectively, which is used to output the conduction of the periodic devices UA and 13B and ", = = = control switching NMOS transistor as an example. The control chip 丨 2 of the devices 13A and 13B are The internal predetermined level signal and the predetermined opening ^ = f production method will be shown) 'and the comparator compares the above number: wave △ enters the comparator (when 13Α is not displayed, _ provides a low for: level J ... The switching device m is turned on and the switching device 13 = to the switching device 13B. At this time, the two ends of the resistance 19 which is input by the switching device UA are gradually generated. Therefore, a low level signal is provided at the output terminal 2 to Switching device] Zhetian control: Level signal to the switching step] LL Shi 丨 J Ye will provide only a south-mounted 13B guide, when the switching device 13 is closed and the switching device is switched off = L: B! Inductor 15 and capacitor 17 The stored electric power is switched through the i-type ίί: two of the above…, which constitutes the conventional exchange for A ′:: t, and its action generates an output DC voltage Vinl, which is used as a rib for the external load circuit. Voltage source. ^ Γ and 'the above circuit structure has many disadvantages When by its original Π = 3 A clever off 'gradually decreases the output current based' this field when the outer large amount of current suddenly needed, & circuit can not provide adequate ca.

564339 V. Description of the invention (2) __ current. Furthermore, when the load current is rapidly changed, the capacitor 17 is provided. Taking the specifications of the CPU as an example, 'most of the power needs to be in the range of + 50niV to -80my. When the load enters a heavy load, the rated current of the wheel at this time is 40A. 80mV / 40A = 2ιηΩ, and when the load reactance must meet the consideration of whether the equivalent series resistance (ESR) of the load is returned to light wearing, in addition to the question of whether the power released by the inductor 15 causes ^, Surge situations are also necessary. As a result, the output voltage does not need to be generated. At present, the general solution is to increase the cost and increase the cost of the equivalent series resistance of the load capacitor, and it cannot solve the problem of the size of two or two t: a surge. Moreover, sometimes because of the second change: Electricity With the above circuit architecture, the problem cannot be solved at all. The yttrium ratio is too large, so in view of this, the main purpose of the present invention is to stabilize the current stabilizing circuit. By providing a turn-on and turn-off time that can be used to obtain the text; the switching device is described to be small, and the time for charging the energy storage device is increased; and: the signal of the switch is adjusted in real time to achieve stability. The output voltage of the circuit can be controlled by the output voltage of the second set and the device: using ::::: than the borrowed voltage as the desired voltage, and the second reference: pressing page 5 0660-552 ^ ^^ 17 V. Description of the invention (3) Under voltage changes ^ The above states are switched on] 3 = When the voltage is greater than the-reference voltage, the output power is not supplied to the load device, so the reference power § It is smaller than the first reference voltage and often greater than the second to adjust the output voltage. It is a voltage-variable resistor device. The second reference voltage is> 1, and the first voltage is near the test voltage. When the output voltage is less than the on state: At this time, the device is changed to a-switch, and the voltage is rising. 4. Load 4 quickly obtains the charging power, so the output power is on. If the above purpose is achieved, the output voltage can be maintained at a stable range. In order to achieve the above purpose, the present invention does not apply the reference voltage based on the first reference electric dust and the reference voltage less than the above-mentioned circuit. It is adjusted to i: electricity; of: f two packs; 屮 is used to store the above-mentioned external electric power and to provide an output current; a feedback device, the power that is merged, and the output current is converted into one No. of feedback = description of the energy storage device; the above-mentioned [signal and output-No.-bit "number and-^ system:]; when the first position signal is described, the above first is introduced; ==, when received by the bureau The energy-receiving device is charged, and when the second source is received, the remaining energy device is discharged; a load device; 3 ;: 钤: the above-mentioned healthy voltage; a sensing device coupled to the load; Output warfare device, when the above-mentioned output voltage is 564339 V. Description of the invention (4) The voltage of _β is still lower than the first reference mine output voltage is smaller than the above-mentioned _ central soil to output a first status signal, when the number is on, when the above-mentioned output voltage Pressure 'output-the second state of the pressure Time, the output-the third reference power and the second reference power are connected to the above energy storage device and negative power = 彳 5 彳, a state switching device, coupled between m ^ ψ 0 ±, M ee, and the load device, When the first state of evil is received, it is closed and stopped. When the first state is received: J = output voltage to the load device, although the third state signal is received: ^ output voltage To the above load device, and to supply the above-mentioned transmission embodiment after waiting for k. Refer to FIG. 2, which describes the component control chip 21 of each component, which is used to switch on and off the devices 22A and 22B N M 0 S The transistor is taken as an example, and its action is to charge the inductor 24 and the capacitor 25 with the current Iout21. The feedback device 23 uses Iout21 and converts it into a feedback signal. In the example, it is due to the inductor 24 and the current. 2 The feedback signal of the clock signal 23 and its internal comparator (not shown), and the comparator results in a periodic method. The schematic clock of the circuit according to the embodiment of the present invention is controlled by the switching technology. Cone connection method in series between inductor 21, inductor 2 and 4 to control crystal The above-mentioned signal is shaped and closed by the output cycle. It is the same as conventional. Among them, the output of the capacitor No. 25 which is captured and compared is used to compare the signals to control the switching devices 22A and 22B as the chip. It has an output circuit. The output current chip 21 is output. After a resistance is detected in this implementation, the ratio of the received self-feedback to its internal load is measured.

564339 V. Description of the invention (5)

Bend the knee: When the control chip 21 provides a high level signal to the switching device 22A, the same 1 = 2 level signal is provided to the switching device 22B. At this time, switch the designation A t ΐ22A, ^ ^ Vin21 ^, ί ΐ Thunder II capacitor 25, so that the inductor 24 and the capacitor 25 are stored ==, so 'produced at both ends of the capacitor 25-gradually increasing = = output current U21 It is also gradually increased; then, when the control chip 21 signals to the switching device 22A, n will be raised to the switching device 22B at the same time. At this time, the switching device 22A is turned off and the switching device is set to 22B. 5 The power stored in the inductor 24 and the capacitor 25 is passed through the switching board. Therefore, the electromotive force at both ends of the capacitor 25 gradually decreases and the output current 1_ also gradually decreases. . DC voltage output above. Photo courtesy of Degree King J. Figure 3 is a diagram showing the relationship between the flute ... r V and the internal cone wave according to an embodiment of the present invention. r No feedback # is greater than the second feedback signal. When the feedback signal provided by 3: 3 in the feedback f is the first feedback signal, after controlling the flute I, I 1 乂 the first feedback signal and the cone wave, it will input π to the device 22A and provide the reverse direction. The second-period wave is the same as the second cycle of 'When the feedback signal provided by the feedback device 23 passes the comparator inside the control chip 21 and 99A, ^ A outputs a second periodic wave to the switching device', P Wave to switch 22B. When the first cycle Γ; Γ ”wave is at a high level, the action of the inductor 24 and the capacitor 25: line ΐ is the opposite, when the first period wave and the second period wave are low level;

0660-5520TWF (N); 89023; robert.ptd Page 8 564339 V. Description of the invention (6): 'Perform the action of discharging the inductor 24 and capacitor 25 ^: You can find the picture of J3 provided by the feedback device 23 In the description, the first period output by the control chip 21 ^^ th-the feedback signal: the low level period is longer, that is, the charging time: :: = shorter, ^. Similarly, when the electric time provided by the feedback device 23 is relatively long, the second period of the second period outputted by the control chip 21 is the second feedback signal and the low level period is shorter, that is, the charging level period is longer. short. Brother Shen Yi has a longer electric time and a higher discharge time than the output power, because the switch between 24 and 2 feedback switches. The borrow must be strong. An exception is dynamic. As mentioned above, the first feedback signal flow provides the second control chip 21 in the feedback device 2 3 to control the charging time of the switching capacitor 25. The same as " Lv No. 'means that at this time the output is set to 2 2 Α and 2 2 Β so as to increase the circuit design by the above. It can be adjusted that the first round mentioned above. In this embodiment, the feedback adjustment , Not a fixed value. When the feedback signal is greater than the second feedback signal, the devices 22A and 22B are the same. When the feedback installation current is low, the control of the inductor 24 and the capacitor 25 can improve the output current feedback signal and the number provided by the second feedback device 23 represents The above-mentioned output current is more stable than that provided by the shortened electrical setting 23 to provide charging control by the first chip 21. The feedback signal is only a feedback signal. In this embodiment, the reason why the feedback device 23 detects the output current of the inductor 24 without detecting the output voltage of the capacitor 25 is that the current is between the inductor 24 and the capacitor 25. The change is faster than the voltage, so the feedback signal can reflect the current condition of the circuit system in a short time. The load device 30 ′ is composed of a resistor and a capacitor, and is used to receive and generate electricity from the inductor 24 and the capacitor 25 through the power provided by the state switching device 26.

0660-5520TWF (N); 89023; robert.ptd 564339

An output voltage Vout22. The first comparator 28 and the second comparator 29 are respectively used to compare the output voltage V0ut22 with the first reference voltage and the second reference voltage. When the output voltage is large, a high-level signal is output, and when When the output voltage is small, a low-level signal is output. Here, the first reference voltage is preset to 1.6V, which is the standard input voltage of the CPU, and the second reference voltage is set to 1.6V-30mV. The state switching device 26 is based on the NMOS transistor as an example, and its state is determined according to the signal received by the gate. = When the output voltage is greater than 1.6V, the first comparator 28 outputs a low-level signal, so the state switching device 26 operates in the pinch-off area, and its state is similar to a closed switch. Therefore output current. i cannot be supplied to the load. When the output voltage V0ut22 is less than L 6V and greater than 1.6V-30mV, the first-output is higher than H 28 and the second comparator 29 is output a low level #, 'Therefore, the state switching device 26 works in the ohmic region, and the state is similar to a one-voltage one resistor. At this time, the output current can be supplied to the load device 30. However, the state switching device 26 at the time of J has the characteristic of resistance and consumes part of the power provided by the output current Iout21. Therefore, the load device 3G is slowly charged to the field output voltage V. When ut22 continues to decrease to less than 1.6V-30mV, the first: ratio =: 29 outputs a low level signal. When & the switching device 27 will be turned on and the current provided by the first power supply Vin22 will be supplied to the state switching device. "::: Hour: The second external power source Vin22 is preset to 12V. Because it provides / ;, L field, the state switching device 26 works in the saturation region, and its state

0660-5520TWF (N); 89023; rober t.ptd page 10 564339 5. Description of the invention (8) Similar to a conductive switch. Due to the setting of 30, the g # 肖 剧 out21 里 is quickly supplied to the load device # it i t ί The load device is charged to a normal level. To 栌 ^ 日 μ provided by the power structure, by providing a feedback 俨 π

The field is changed; U is set according to the above feedback signal. When the feedback signal becomes small, the operating voltage, when y is large, increases the energy storage system and places it at two; Adjust to reach stability ... In addition, the present invention uses the detected output voltage and the voltage is compared with the second reference voltage, and the state is switched by 2; = (the output stabilized in the voltage Λ circuit, where the-reference voltage is Greek , The value (h 6V in this embodiment), and the second reference voltage is the lower limit of the change in output voltage (in this embodiment, 1.6V-30mV). The above-mentioned output voltage is greater than the first reference voltage in winter At this time, the above-mentioned state switching device is used as a switch and is in a closed state. At this time, the power supplied by the energy storage device cannot be supplied to the load device, so the output voltage drops. When the voltage is less than the first reference When the voltage is not greater than the second reference voltage, the state load device acts as a varistor at this time, and can change its own impedance according to the output voltage value to adjust the output voltage near the first reference voltage. When the output voltage is less than the second reference When voltage is applied, the above-mentioned state switching device acts as a switch and is in a conducting state. At this time, the power provided by the energy storage device is directly supplied to the load device, so that the load device quickly obtains Electric power of 'the output voltage increases. By the above-described circuit configuration, the output voltage in a stable range, and no need to consider whether a sufficiently small ESR and

0660.5520TW (N); 89023; robert.ptd

564339 V. Description of the invention (9) The problem of the surge generated by the electric power released by the inductor is solved. Although the present invention is disclosed as above with a preferred embodiment, it is not intended to limit the scope of the present invention. Any person skilled in the art can make some modifications and decorations without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

0660-5 520TWF (N); 89023; robe r tp td Page 12 564339 Brief description of the drawings In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, a preferred embodiment is given below and cooperated with The attached drawings are described in detail as follows: Illustration: Figure 1 is a structural diagram of a conventional switching power supply. FIG. 2 is a circuit diagram according to an embodiment of the present invention. Fig. 3 is a diagram showing the relationship between the periodic wave output from the control chip 21 and the feedback signal and the internal cone wave according to the embodiment of the present invention. Explanation of symbols: 11, 2 1 ~ control chip 13A, 13B, 22A, 22 ~ switching device 15,24 ~ inductor 17,25 ~ capacitance 1 9 ~ resistance 23 ~ feedback device 2 6 ~ state switching device 27 ~ switching device 28 ~ First comparison device 29 ~ Second comparison device 30 ~ Load devices vinl, vin21, vin22 ~ External power supply

0660-5520TWF (N); 89023; rober t.ptd p. 13

Claims (1)

564339 6. Application patent scope h — A voltage stabilization circuit, which is suitable for adjusting the power of the second power source to a round output voltage based on a first reference voltage and a second reference voltage, including: Two = energy devices for storage The electric power provided by the first external power source described above and provides a round of current output; &#: ^ awarding device for capturing the output motor output from the energy storage device and converting it into a feedback signal; w a control chip According to the feedback signal, a first position signal and a second position signal are rotated out; the first switching device is coupled to the control chip, and when the upper signal is received, it is attractive. The first—external power supply to the storage battery. When the second position signal is received, the battery performs a discharging operation on the moon storage device; a load device for outputting the output voltage. Considering the above-mentioned load device 1, when the output voltage is less than the first output voltage, a first state signal is output. When the number is above, when the output is above; when the voltage is: ^ 彳 voltage, the output is the second state. When the pressure is between, the first and second test voltages and the second reference voltage can be used to know 7 from the second signal; and, when the above-mentioned ^ ^ is transferred to the above-mentioned energy storage device When the output voltage of the load device reaches the above-mentioned negative state signal, it is turned off and the supply is stopped, then it becomes negative-M :, when the second state signal is received, it is turned on to supply the above 3 2 receiving The voltage is output to the load device to the third state signal 4. 0660-5520TW (N); 89023; robert.ptd Page 14 564339 VI. Patent application range cut off ^ Γ The stable circuit as described in item 1 of the May patent scope, in which the other ~, switching device is an NMOS Transistor. The above-mentioned voltage regulator circuit described in item 1 of the scope of patent application of H, and the upper-, lower-, and lower-state switching device is a PMOS transistor. The voltage regulator circuit described in the above state 4 state, wherein the upper region. When the device receives the first state signal, the device operates in the voltage stabilizing circuit described in item 4 of the patent range of 5 cuts and 11 eyes, wherein when the switching device receives the second state signal, it operates in saturation. 6. Please refer to the voltage stabilization circuit described in item 5 of the patent scope. When the replacement device receives the third state signal, it operates in Central Europe: Switch the 7 voltage regulator circuit described in item 6 of the patent scope, where First: MOS transistor, coupled to the first external power supply, and: f2_ transistor, coupled to the -_ transistor and ground point, where the second transistor and the second hall transistor are connected To the energy storage device. I # 8. The voltage stabilizing circuit as described in item 7 of the scope of patent application, wherein the energy storage device is composed of an inductor and a capacitor. 9. The voltage stabilizing circuit according to item 8 of the scope of patent application, wherein the load device is composed of a resistor and a capacitor. 1 0 · The voltage stabilizing circuit as described in item 9 of the scope of patent application, wherein the above I page 15 0660-5520TWF (N); 89023; robert.ptd 564339 6. The patent application Fanyuan sensing device includes: The comparator is used to compare the output voltage and the first reference voltage. When the output voltage > 1 is greater than the first reference voltage, the first status signal is provided. When the output voltage is less than the first reference voltage, the comparator is provided. The third state signal; a second comparator for comparing the output voltage and the second reference voltage, and providing a conduction signal when the output voltage is less than the second reference voltage; and a second switching device Connected to a second external power source, when receiving the above-mentioned conduction signal, the second external power source is introduced and the second status signal is generated.