TW201218589A - Spectrum shaping method for a switching regulator - Google Patents

Abstract

The present invention relate to a power supplier having a main circuit and for providing a power to a load wherein the main circuit has a spectrum range, comprising: a signal catching unit sampling a signal level changing with respect to the load; and a spectrum reshaping unit coupled to the signal catching unit and modulating the spectrum range in accordance with the signal level.

Description

201218589 VI. INSTRUCTIONS··: TECHNICAL FIELD OF THE INVENTION The present invention refers to a power supply device, in particular, a power supply device having a spectrum remodeling module. [Prior Art] AC/DC converters and DC/DC converters are widely used in power modules.

These include circuits such as Rectifier, Boost, Flyback, and Buck to convert voltages from different transmission directions to a single value as a means of providing various voltage levels to the electronics. Current sampling as a technique for voltage regulation control has not been simplified to be used accurately in high-power systems. PFC with PWM power loop control has been integrated into the existing power supply state of the module, and with different specifications to achieve the scope of practical applications 'but through the improvement of the circuit to stabilize the product design function, to optimize the overall circuit The working mode and the improvement of the immunity against electromagnetic interference have not been effectively realized. In order to achieve small volume and high scales, the recording height is high (for example, several tens of KHz). Switching of high-frequency switching in switching power supply can cause serious electromagnetic interference (biliary), which not only reduces the quality of the power grid, but also affects the normal operation of the electronic equipment connected to the power supply or the electronic equipment, and even the reading and hiding of Wei and Wei Weaving. 4 This country has made strict strictness against the electric circumstance of the source. The main existing low-powered _ green light fresh, the county concentrated energy at a frequency (or energy in a narrow frequency band) is distributed in a way to reduce electromagnetic interference, its spectrum range 'changes and changes . The frequency is not suitable for the switching frequency with the load. [Invention] The present invention proposes a type of electric device that has a main loop and is used for

S 3 201218589 provides power, the main loop has a spectrum range, and includes: a signal intercepting unit for sampling a quasi-signal from the main loop, the magnitude of the level signal varies with the load; and the spectrum The remodeling unit is coupled to the signal intercepting unit and modulates the spectral range according to the level signal. Preferably, the power supply device further comprises: a MOSFET switch, a feedback signal size and an internal current source limit value determining whether the component is turned on or off; and a comparator, after comparing the inputs, rotating high and low voltages to control the switch; A shaping capacitor affects a voltage end point through charge and discharge; M,; - first-off, which is matched with the second level to charge and discharge the whole job; a policy switch, which is matched with the first switch to the shaping capacitor Charging and discharging; - a first shaping resistor, a path for charging the shaping capacitor; and a second shaping resistor, a path for discharging the shaping capacitor. Preferably, the electric ray is set, and further includes: _mainly turning off the MOSFET switch when the peak value thereof is turned to a default value. The level signal determines the -voltage limit value of the internal current source to charge a capacitor. When the capacitor voltage reaches the voltage limit value, the MOSFET switch is turned on. Preferably, the electrical device is configured to perform the following steps: (Α) When the output of the comparator is a low voltage, the first switch is turned on and the second switch is turned off. The quasi-signal Yuling-plastic sister does slow rail power to the shaping capacitor, the voltage creep point is slowly boosted; (8) when the boost is set to a certain value, so that the Chen (four) feeds high power ^, the first opening At the same time, the second switch is turned on, and as a result, the shaping capacitor is slowly discharged through the second shaping galvanic, the terminal of the electric house is slowly stepped down; and when the voltage is stepped down to set a certain limit value so that the output of the comparator is low voltage Step (A) is repeated, and the end point of the battery is ^ wave. Preferably, the power supply wire is placed in a manner that the shredding rate of the towel spectral remodeling unit changes as the voltage end point changes to achieve the function of spectral remodeling.曰考

S preferably the power supply device, the circuit comprising the signal intercepting unit without spectrum reshaping 4 201218589 unit 'where the spectrum remodeling unit is controlled by the level signal. The rectifying unit converts the alternating current into direct current, and the unit can generate isolated and modulated direct current dust, and is also controlled by the switch to transfer energy from the primary side of the circuit to the secondary side. The signal interception unit will output a level signal _ to the spectrum regenerative unit to control the operation of the switch by signal processing. Preferably, the power supply device' wherein the main circuit further comprises: a rectifying unit, a receiving-power input; a surface unit coupled to the rectifying module and configured to modulate a voltage value of the power input; The unit 'finally the county module; the sin axis remodeling unit, coupled to the signal intercepting unit. Preferably, the crane supply unit 4 has a face unit that is used to hold the voltage value at a specific level based on the level signal. Preferably, the electric service device is on a circuit in which the material exchange changes. Preferably, the power supply device, the rib exchange solution is inversely proportional to the _ size of the voltage end point. The large HH is strictly proportional to the thief, and thus the county township can be controlled by the level signal, and is inversely proportional thereto. The comparator and the reference level signal and the logic circuit generate the switching frequency to the feedback signal size touch-patch switching switch. The invention provides a kind of Wei supply wire, and the size of the county axis is controlled by the level signal. When the level signal is increased, the spectrum range is relatively narrow; conversely, when the level signal is decreased, the spectrum range is relatively wide. Preferably, the money supply device, t-贞 residual correction, the level signal will decrease; when a load is low, the level signal will increase. Compared with the power supply device of k, when the scale is low, the frequency of material exchange is lowered, and the spectrum function is also narrowed. When the load is increased, the switching solution will increase and the same spectrum shaping range will be wider.更好 Preferably, the power supply device generates the same change in the leg-and-replacement solution. The spectrum shaping control is applied to all working ranges, and the range of the range is changed with the frequency of the sigma frequency. The grading is finer and larger at high frequencies. At low frequencies: small 'the actual value is limited by the component parameters. In the adjustable _, we can do = the absolute size of the frequency range. *,, and preferably, the electric wire is placed, and the money supply wire can obtain a good EMI suppression in the riding rate range. ^ Preferably, the power supply (4) can be used in the design of the city. Electric pick

The present invention proposes a power supply wire arrangement, which has a-small detail, and includes: a main road 'generates a quasi-signal; and a spectrum remodeling module that receives the level signal and according to the bit The quasi-signal modulates the spectrum range. Vu, preferably the power supply device having a spectral flip and comprising: - a primary loop having a - parameter; and - a spectral heavy octet receiving the parameter and depending on the parameter spectral range. Preferably, a spectral modulation device has a spectral range comprising: a spectral weight plane, and receiving a quasi-signal and modulating the spectral range based on the level signal. Preferably, the spectral modulation method uses a turn-off power supply to provide a spectral range. The method includes: receiving a quasi-signal; and modulating the spectral range according to the level signal. Changing, and adjusting the size of the spectrum of the circuit design has substantial help. The present invention adopts the above-mentioned circuit and/or method, and can receive the feedback signal 'and according to the change of the feedback signal ___ the opening rate of the pressure wei, the frequency of the fresh spectrum remodeling of the money fe® to effectively reduce the electromagnetic interference' More specific modes of operation and benefits are described in the embodiments. 201218589 I Implementation Mode] The power supply voltage regulation and spectrum reshaping proposed in this case will be fully understood by the following examples, so that those skilled in the art can complete it. However, the implementation of this case is not Other embodiments may be devised by those skilled in the art from the following examples, which are intended to be within the scope of the invention. The invention enables the DC power converter to extract the output signal by a feedback circuit and sample the controlled current to perform loop processing and control by the designed spectrum reshaping circuit and the logic circuit under different loads. Press and make the same change as the operating frequency range changes with a change in the switching frequency. 1 and 2 are switching regulator circuits 100 according to an embodiment of the present invention, wherein FIG. 1 is a detailed internal structural diagram of the control chip IC1 of FIG. The switching regulator circuit 100 includes a main body composed of a bridge rectifier 101, a transformer τ (including a primary winding and a secondary winding, a main switch Μ 108 (provided inside the control chip), a diode Di, and an output capacitor c(10). a circuit, an input capacitor Cin, and a control circuit and a feedback circuit. In this embodiment, the feedback circuit 103 includes an optocoupler D, a first resistor & a first Zener diode DZ1 and a second resistor & The diode portion of the optical unit D〇 is coupled in series with the first resistor and the first Zener diode Dzi between the output end of the switch spike circuit 1〇〇 and the ground; the triode portion of the smooth surface D. In series with the second resistor & the power supply and the ground, in this embodiment, the power supply is the internal power supply. However, those skilled in the art should recognize that the feedback circuit can be a resistor divider circuit. Or the capacitor divider circuit, for the sake of simplicity, the specific structure is not detailed here, but the effect is the same as that of the feedback circuit 1〇3 of the embodiment, and the output of the open-source voltage circuit 1GG is sampled, and the surface circuit is generated. 100 output signal related feedback In this embodiment, the control circuit includes control wafer % and resistance, capacitance c. In this embodiment, as shown in Figure 1, the switching regulator circuit just includes the chip for providing the %s 7 201218589 internal The auxiliary winding of the power supply is 2, and the diode D2 is connected in parallel with the lion winding 2, the first resistor R3 and the capacitor q, and the domain power supply is taken from the connection terminal of the third power and the capacitor c]. The main switch Μ 108 adopts nm 〇 s. The control circuit of the switching regulator circuit 1 包括 includes a current sampling circuit 1 , a comparison circuit 104 , a clock generation circuit 105 , a logic circuit 1 〇 6 , and a spectrum reshaping circuit 1 , 7 , wherein The comparison circuit 1〇4, the clock generation circuit 1〇5, the logic circuit 1〇6, and the spectrum reshaping circuit are integrated in the IQ in FIG. 1. Specifically, in this embodiment, the % shown in FIG. The circuit, the logic circuit 1〇6 includes a flip-flop u4; the clock generating circuit 1G5 includes a woven wave circuit and a short-pulse circuit ^. The noise-toothed circuit includes a clock capacitor c〇, a current source Ια, a clock switch & Cut. Clock capacitor C〇, current source Iq The clock switch & is connected in parallel between the non-inverting input terminal of the first comparator U and the ground. The short pulse circuit is coupled between the output terminal of the logic circuit 1〇6 and the control terminal of the clock switch Ss. When the circuit is running, when the output of the first comparator U! is high, the output of the logic circuit 1G6 goes high, and the signal that becomes high is closed by the short pulse circuit Tpuls "^" to close the clock switch S3 for a short pulse period Tp. After the short pulse period Τρ, the clock switch S3 is turned off, and the clock capacitor (^ is restarted until the voltage across it is greater than the voltage of the inverting input terminal of the first comparator Ui, and the first comparator recognizes that the output goes high. The switching regulator circuit enters a new duty cycle. At the same time, those skilled in the art will recognize that since the clock capacitance Q) has a relatively large capacitance, it is disposed outside the control chip ICi in this embodiment's but it can also be integrated into the control chip ICi. In the embodiment shown in FIG. 1, the current sampling circuit 102 includes a sampling resistor Rs coupled between the source and the ground of the main switch M 108 for sampling the current flowing through the main switch M 1 〇 8 to obtain a sampling. Current. However, those skilled in the art should recognize that the current sampling circuit 102 can be a transformer sampling circuit, a current amplifier sampling circuit, and the on-resistance Rds-on ' of the main switch M 1 〇 8 itself for simplicity of description, which is not detailed herein. The structure, however, and the effect of the sampling resistor Rs - "sample" the current flowing through the main switch μ 108 to obtain the sampling current. 8 201218589 In this embodiment, the comparison circuit 104 includes a third comparator %, and the non-inverting input terminal is coupled to the series coupling point of the sampling resistor Rs and the main switch Μ 108 to receive the sampling capacitor. The output current reference signal Ref is coupled to the reset terminal R of the Rs flip-flop to output a comparison signal to the reset terminal R of the RS flip-flop A. The skilled person in the art should be aware of the error signal caused by the suppression of the secondary side diode reverse recovery and the parasitic parameter oscillation. In this embodiment, the third comparator u3

The in-phase wheel input is coupled to the series coupling point of the sampling resistor Rs and the main switch Μ 108 through a LEB (Lead Edge Blanking) module, as shown in FIG.

In this embodiment, in the feedback circuit 103, the diode portion of the light-light D〇 is connected in series with the resistor & Zener diode DZ1 in the series between the output terminal of the switching regulator circuit and the ground; The triode portion of the D〇 is coupled in series with the resistor & between the self-powered pin of the control chip ICi and the ground, and the triode portion of the optocoupler Do is coupled to the feedback pin FB of the wafer. That is, the feedback circuit 1〇3 is connected to the output terminal of the switching regulator circuit 1〇3 to sample its output signal, and generates a feedback message related to the output signal of the switching regulator circuit 1〇3. In this embodiment, the spectrum reshaping circuit 107 includes a second comparator U2, a first switch S1, a second switch S2, a bias power source U5, a first shaping resistor RS1, a second shaping resistor RS2, and a second shaping resistor Rs3. , the fourth shaping resistor ', the connection power, the shaping capacitor c illusion and the first Zener diode Da. The feedback signal VpB is sent to the input end of the spectrum reshaping circuit 107 via the feedback pin fb, that is, the input terminal of the spectrum reshaping circuit 1〇7 is connected to the output terminal of the feedback circuit 1〇3, and receives the feedback signal Vfb. The voltage value of the bias power source U5 is 乂, and the clamp voltage of the second Zener diode 为 is. The shaping capacitor Csi is secreted between the output of the scale reshaping circuit 107 # and the ground; the second shaping resistor Rs2 and the second switch & are connected in series with the shaping capacitor Csi in parallel. One end of the connection resistor is coupled to the input end of the spectrum reshaping circuit 107, and receives the feedback signal VfB, and the other end of the connection resistor is coupled to the inverting input end of the second ratio u2 through the bias power source Q to make the second edge n U2 inverting input terminal voltage 201218589 = vFBvbias, while the other end of the connection resistance is connected in series with the first switching resistor Rs丨 and then coupled to the spectrum reshaping circuit 107. When the shaping is performed, the shaping_first-off S1 is closed. HCS1; connection repair & marriage terminal and cathode coupling, second Zener-炻栌nJ 菔22 minus H ground, so that when the feedback signal VpB is large

Thunder flute - when the sweet bit of the body 22 is electric dust U, the feedback signal Vfb is embedded in 乂_·. - Comparing the non-inverting input of ϋυ2 through the third shaping resistor to understand the output of the reshaping circuit 107; the second comparator U input phase simultaneously passes through the fourth shaping resistor to its output; the output of the second comparator U2 Simultaneously connected to the first control terminal and the control terminal of the second switch S2; and when the turn V3 of the second comparator U2 is low, the first switch Si is closed, and the second switch S2 is turned off; (4) When the output v3 is still "first", the switch Si is turned off, and the second switch S2 is closed, that is, the first switch S1 and the first switch s2 form a complementary conduction relationship. The output of the spectrum reshaping circuit is drained to the second input terminal of the clock generating circuit 1G5. In this embodiment, the second input end of the clock generating circuit 105, that is, the inverting input terminal of the first comparator U. When the switching regulator circuit _ line, the correction clock generates f (10) input (four) level signal to the set terminal s of the RS flip-flop U4, then the RS flip-flop (four) output q is set high, so that the main switch Μ 1 is turned on, the flow The current through the main switch % 1 〇 8 increases. When the current flowing through the main switch μ (10) is increased such that the output of the training circuit (10) is greater than the current reference city W, the output of the comparison circuit 1〇4 is changed to 'the output q of the RS flip-flop 被 is reset to low, so that the main switch Μ 108 was opened by Sis. Until the output of the clock generating circuit 1〇5 goes high again, the output q of the RS flip-flop A is reset, the operation of the circuit 1〇〇 enters a new duty cycle, and the loop operates as described above. At the clock generating circuit 1Q5, when the output is zero, the switch & is turned off, and the electric hunger source Ια charges the electric valley C , so that the voltage across the capacitor gradually increases, that is, the first comparator _ _ The input terminal voltage is slowly increasing. When it increases to a voltage greater than the inverting input terminal of the _ comparator u (ie, the output v4 of the spectrum reshaping circuit 107), the first comparison 201218589 U1 turns high, so that the switch S3 is closed, the capacitor The charge at both ends is rapidly released and its voltage drops to zero. At this time, the in-phase wheel terminal voltage of the first comparator is lower than the voltage of the inverting input terminal, and the output of the comparator is lower. Therefore, after the short pulse period Tp of the short pulse circuit Tpulse ends, the switch & It is disconnected, so that the current source h restarts to charge the capacitor Q) 'clock generation circuit 1〇5 enters a new duty cycle and works as described above. The frequency of the clock generating circuit 105, /= - one _ where Cco is the capacitor C 〇

Cc〇x-f--^Tp

The capacitance value, 1〇 is the output current of the current source 1ct, and Τρ is the short pulse duration of the short pulse circuit. For a given _bump circuit, since the capacitance value C(3) of the capacitance Q, the output current Ιο of the current source Ια, and the short pulse duration period & of the short pulse circuit T(4)se are given 'so' in this embodiment, the clock The frequency of the generating circuit 1〇5 is determined by the output % of the spectrum reshaping circuit 1〇7. And when the output % of the spectrum reshaping circuit 1〇7 is larger, the longer the time required for the capacitor c〇 to touch the value of v4, the smaller the frequency of the clock generating circuit 1〇5; otherwise, the spectrum reshaping circuit 107 The smaller the output V4, the shorter the time required for the capacitance (^ to touch the % impurity at both ends) The frequency of the clock generating circuit 105 is larger. As will be seen from the description below, it is applied to the first comparator & inverting input. The voltage, that is, the output V4 of the spectrum reshaping circuit 107 will be a triangular wave. At the spectrum reshaping circuit 1〇7, if the voltage of the inverting input terminal of the second comparator Uz is greater than its in-phase input terminal voltage V2, that is, Vl>;V2Bf, the output of the second ratio % is low (V3=0) 'The first switch S1 is closed' and the second switch S2 is open. At this time, the feedback signal & via the connection resistor Rs5, the first switch S1, the first - The shaping resistor ^, when charging the shaping capacitor Csi, the wheel-out voltage % of the spectrum reshaping circuit K) 7 is gradually increased, and at this time, the voltage of the non-inverting input terminal of the second comparator u2: V2

R 54 So, V2 gradually increases with the increase of %. When increased to such that the non-inverting input terminal voltage % of the second comparator 201218589 U2 is greater than its inverting input terminal voltage Vi, ie, v2 > Vi, the output V3 of the second comparator U2 becomes high, that is, the second comparison # U2 output The high level value v3H, the first switch 'second chat & closed. At this time, the shaping capacitor Cs is electrically charged at both ends, that is, the voltage V4 is discharged through the second shaping resistor Rs2 and the second gate s2, and the voltage of the non-inverting input terminal of the second comparator is:

6 = F4X

R S4

R S3 S4 and S3+ and S4

Then 'V2 gradually decreases as v4 decreases. #reduce to such that the inverting input terminal voltage V1 of the second comparator U2 is greater than its non-inverting input terminal voltage V2, i.e., Vi>v2, the output 〃3 of the second comparator U2 goes low again, and enters the process as described above. Therefore, the shaping capacitor Csl is charged and discharged by the loop, and the output of the spectrum reshaping electric _ is obtained by adding the three (four) nucleus in the triangle, and the input 知 U = voltage is about to be greater than the voltage of the inverting input terminal. Electric v4H3〇l, then: when gPV2=Vl time 1 reaches its peak voltage

R S4 V, bias

The voltage of the inverting input terminal of Us is gradually larger than the peak value of the triangular wave after the peak value of the rising wave of the triangle wave is larger than that of the first comparator of the field. As shown in Fig. 3, the valley voltage V4L3G2 is as follows: 'that is, Vl=V2 time - Λ, rate shaping spectrum 300 check n

VAL

R S4 vt

VL R, RS3 + Rs^ Correspondingly, the frequency of the voltage regulator circuit 100 at the peak of the triangular wave is the frequency f of the inner channel 105 (ie, opening "^, 珉 small value dragon 303:

♦旷 L

Ft --

Tp+CCQ 12 (1) 201218589 At the valley of the triangular wave, the clock generation circuit (10) rate (ie, the frequency of 100) is its maximum value /w304: Λ S4 7; + Cc〇x 乂 and 53 + and S4 ( 2) h

As shown in Fig. 2, the frequency shaping spectrum 3〇〇 is the output % of the spectrum reshaping circuit ι7, the frequency of the clock generating circuit 105, and the waveform 3〇5 of the driving main switch Μ 1〇8 (ie, the flip-flop U4) The output of the Q waveform). It can be obtained from the above equations (1) and (2) that when the feedback signal Vfb is increased, the frequency f of the clock generation circuit 105 is decreased; conversely, when the feedback signal Vfb is decreased, the clock generation is =^)5. Increase. On the other hand, the switching frequency of the switching regulator circuit, that is, the clock generation rate of the boat, increases the frequency of the turn-on voltage regulator circuit 100 when the self-feedback signal VpB increases. On the other hand, when the feed signal VfB is reduced, the switching mode of the switching medullary circuit 1GG () minus the equation (1)' can be obtained as follows: =------ 1i±A4 ¥ 简: ηΊ~ν3Ηχ ~Λι u54

Tp +Cc〇X and MH) Ac XS4 h

Cc〇: and S4 and S3 + rp+Cc〇X __' Ffti® ~ V3ff v — RSZ +

r, + Q

RP "^co ' •54 h Since the output current of the upper source L is for a specific system!, the capacitance (10) of the short _^ equation (), the short pulse duration of the current circuit Tpulse, % To s (3) 13 201218589 The fourth shaping resistor RS wide R 』 resistance, the bias power supply's test for the U two comparator 112 output high value V3H are determined 'so, the spectrum reshapes the secret and return to the dish The signal % changes in the opposite direction. That is to say, 'when the feedback 峨, the increase or decrease of the lag frequency Μ becomes smaller; on the contrary, when the feedback signal Vfb decreases, the frequency range of the spectrum remodeling becomes larger. The expression of 1GG _ _ rate fine feed signal & can be obtained. When the feedback signal vFB increases, the switching frequency of the switch_circuit 1〇〇 decreases, and the spectrum weight (4) fresh range Af also becomes smaller; t_ When 峨& is reduced, the switching frequency of the switching regulator circuit 100 increases, and the frequency range of the spectrum reshaping becomes larger. Therefore, the spectrum remodeling range of the switching regulator circuit 100 varies with the switching frequency. Change: When its switching frequency increases, its spectral remodeling range will increase accordingly; When the switching frequency is reduced, the 'face reshaping range is correspondingly reduced. Therefore, the switching regulator circuit (10) provided by the present invention solves the problem of fixed frequency range and effectively reduces electromagnetic interference. The present invention proposes a power supply The function is to design the charging and discharging setting timing and the switching circuit row control through the sampling wheel signal and the internal control current 'via the comparator circuit and the logic circuit #. This 2^ can be implemented in the effective function The group carries out the dual requirements of spectrum reshaping and reaching the voltage regulation. This invention can effectively solve the problem of circuit application design and material making that the frequency is fixed and is not easily affected by different working frequency requirements. Ah, this can be modularized in the industry (4) PWM In the switch control 1C or independently applied to a large number of power supply providers, the countermeasures for the electronic products that are often limited by the power supply interference, and the suppression of electromagnetic dry-shooting can also be optimized. 1 . A power supply device having a main circuit for supplying power to a load, the main circuit having a spectrum range, comprising: a signal intercepting unit, Sampling a quasi-signal from the main loop, the magnitude of the quasi-signal varies with the load; and a spectrum reshaping unit coupled to the signal intercepting unit and modulating the s 14 according to the level signal 2. The power supply device according to the first embodiment, further comprising: an M〇SFET switch, a feedback signal size and an internal current source limit value determining whether the component is turned on or off; and a comparator 'by comparing After input, the high and low voltages are output to control the switch-shaped capacitor, and the first switch is affected by the charge and discharge, and the second switch is used to charge and discharge the shaping capacitor; the second switch is matched with the first switch. Charging and discharging the shaping capacitor; a first shaping resistor is a path for charging the shaping capacitor; and a second shaping resistor is a path for discharging the shaping capacitor. 3. The power supply device according to the second embodiment, when the peak current reaches a peak value, the MOSFET switch is turned off. The level signal determines a voltage limit value for the internal current source to charge the valley. When the capacitor voltage reaches the voltage limit value, the MOSFET switch is turned on. The power supply device according to the third embodiment, the operation between the components includes the following steps: (A) when the output of the comparator is a low voltage, the first switch is turned on and the second switch is turned off. 4 The quasi-signal will slowly charge the shaping capacitor via the first shaping resistor'--the voltage end will be slowly boosted; (9) When the boost is set to a certain limit value and the output of the comparator is high voltage, the first switch When the second switch is turned off, the shaping capacitor is discharged through the second shaping t. The voltage terminal is stepped down; and (C) is stepped down to a certain limit value to make the output of the comparator low. Step (A) is repeated, and the voltage end point is a triangular wave. 5. The power supply apparatus according to the fourth embodiment, wherein a switching frequency of the spectrum reshaping unit changes as the voltage end point changes to achieve a spectrum reshaping function. 6. The electric secret device according to the first embodiment, wherein the signal receiving unit and the heavy fresh 7C are controlled by the scale signal. The power supply device of the first embodiment, wherein the main circuit further comprises: a rectification early π 'receive-power input; a variable voltage unit, which is lightly coupled to the rectification module and used to adjust the power supply of 201218589 Inputting a voltage value; the signal intercepting unit is coupled to the transformer module; and the spectrum reshaping unit is coupled to the signal intercepting unit. 8. The power supply apparatus of the seventh embodiment, wherein the spectrum reshaping unit further comprises: a voltage stabilizing unit for maintaining the voltage value at a specific level according to the level signal. For example, the third embodiment implements the source f supply device, wherein the _ fresh-keeping is inversely proportional to the size of the voltage end point, and the size is proportional to the scale squid, whereby the switching frequency can be controlled by the level signal. And it is inversely proportional. The power supply device of the ninth embodiment, wherein the size of the spectrum range is controlled by the level signal, and when the level signal is increased, the spectrum range is relatively narrow; otherwise, when the level signal is decreased Then the spectrum range is relatively wide. For example, the power supply device of the i-th embodiment, wherein when a load is high, the level signal is reduced; when a load is low, the level signal is increased. 12_ The power supply device according to the U-thin, when the towel is low, the switching frequency is lowered, and the spectral range is also narrowed. As the load increases, the switching frequency increases and the spectrum shaping range also widens. 3' The power supply for placement as described in the twelfth implementation step' has a similar variation with the switching frequency. 14. The power supply device according to the embodiment of the invention, wherein the spectrum shaping control is applied to all the work culverts, and the fun spectrum is changed. 5. If the i-th real-off Wei's electric wire is set, the surface-wei supply wire can get a good EMI suppression in all working frequency ranges. 16. The power supply device according to the first embodiment, which can be applied to a circuit in which the switching frequency is changed. 17. A power supply device having a spectrum range comprising: - a primary loop, generating a ~ level signal; and - a county reshaping her, detailing, and modulating the spectrum according to the 201218589 level signal The range β 18 is a power supply and supply device having a spectrum spectrum, comprising: a main loop having a ", and a spectrum reshaping module receiving the parameter and modulating the spectrum according to the parameter range. 19. A frequency " modulation device having a spectral range comprising: a spectral remodeling module that receives a level signal and modulates the spectral range based on the level signal. 20. The = frequency "daily modulation method" is used to modulate a spectral range of a power supply device, the party, the receiving-level signal, and the spectral range according to the level signal.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a switching regulator circuit according to an embodiment of the present invention. Figure 2 is an internal block diagram of the control wafer according to Figure 1. Figure 3 is a schematic diagram of the output of the frequency spectrum f f曰 remodeling circuit, the frequency of the clock generation circuit, and the waveform of the driving main switch in the switching regulator circuit.

[Main component symbol description] 100: Switching regulator circuit 102: Current sampling circuit 104: Comparison circuit 106: Logic circuit 108: Main switch M (MOSFET) 300: Frequency shaping spectrum 302: Valley voltage V4L 304: Off regulation circuit frequency Maximum value 1C! · Control chip To: Primary winding 1' Bridge rectifier 103: Feedback circuit 1 %: Clock generation circuit: Spectrum reshaping circuit ^^^^ Control chip 3Q1: Peak voltage V4H 303: Off regulation circuit frequency Minimum value 3 () 5: main body switch Μ waveform Ding.

Tl ••Secondary winding 17 201218589

Τ2: auxiliary winding D!: diode DZ1: first Zener diode C〇UT : output capacitor

Rs : sampling resistor R2 : second resistor

Rds-on : main open 'off Μ on resistance Q : capacitor NMOS : main switch Μ U2 : second comparator U4 : RS flip flop

Tpulse: short pulse circuit Ct: current source

Vcc: self-supply pin V3H: second comparator output high value FB: feedback pin

Si: first switch s3: clock switch RS2: second shaping resistor RS4: fourth shaping resistor vbias: bias supply voltage value

Vi: second comparator inverting input voltage v3: second comparator output R: flip-flop reset terminal Q: RS flip-flop output D dimming surface D2. Diode ΐ > Ζ 2: second Zener diode ClN ::Input capacitor Ri First resistor R3: Third resistor Co: Capacitor CS1: Shaping capacitor U!: First comparator u3: Third comparator U5: Bias power supply Tp: Short pulse period: Current source Ια Output current Vfb: feedback signal Ref: current reference signal LEB: pulse leading edge blanking S2: second switch Rsi: first shaping resistor RS3: third shaping resistor RS5: connection resistance

Vzener: second Zener diode clamp voltage V2: second comparator non-inverting input voltage V4 : spectrum reshaping circuit output S : RS flip-flop set △f : spectrum reshaping range

S 18

Claims (1)

201218589 VII. Patent application scope: 1. A power supply device having a main circuit for supplying power to a load, the main circuit having a spectrum range, comprising: a signal intercepting unit for receiving from the main circuit Sampling a quasi-signal, the magnitude of the quasi-signal varies with the load; and a spectrum reshaping unit coupled to the signal intercepting unit and modulating the spectral range according to the level signal. 2. The power supply device of claim 1, further comprising: a MOSFET switch, a feedback signal size and an internal current source limit value determining whether the component is turned on or off; a comparator; 'Output high and low voltage to control the switch. A shaping capacitor; affecting a voltage endpoint size via charge and discharge. a first switch; the second switch is used to charge and discharge the shaping capacitor; a second switch is used to charge and discharge the shaping capacitor with the first switch; a first shaping resistor is a path for charging the shaping capacitor; A second shaping resistor 'is a path for discharging the shaping capacitor. & As claimed in claim 2, the power supply device, the main current whose peak value reaches a predetermined value, turns off the MOSFET. The transfer signal of the mosquito shaft current source to the -capacitor-voltage limit value, when the capacitor voltage reaches _voltage limit value ^; turn on the MOSFET switch" ' 4. As claimed in the third step of the patent: The supply device, the operation between the red components includes (A) when the rotation of the comparator is a low voltage, the first switch is turned on at the same time, and at this time, the scale will slowly rise through the voltage of the first (8) When boosting to set a certain limit value and making the wheel (4) of the comparator high voltage, the first open 201218589 shaping resistor discharges, the off is closed and the second switch is turned on, and the shaping capacitor is connected via the second voltage end point. Step-down; and (6) when the drop is set to 峨 峨 较 的 ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( 5. The power supply device of claim 4, wherein a switching frequency of the spectrum reshaping unit changes as the voltage end point changes to achieve a spectrum reshaping function. 6. The power supply device of claim i, wherein the circuit pack subtraction number intercepts the spectrum remodeling unit, wherein the spectrum remodeling unit is controlled by the level signal. 7. The power supply device of claim 1, wherein the main circuit further comprises: a rectifying unit receiving a power input; a transforming unit coupled to the rectifying module and configured to modulate the power supply Inputting a voltage value; the signal intercepting unit is configured to face the transformer module; and the spectrum reshaping unit is coupled to the signal intercepting unit. 8. The power supply apparatus of claim 7, wherein the spectrum reshaping unit further comprises: a voltage stabilizing unit for maintaining the voltage value at a specific level according to the level signal. 9. The power supply device of claim 1, wherein the switching frequency is inversely proportional to a magnitude of the voltage endpoint, the magnitude being proportional to the level signal, thereby obtaining the switching frequency This level is controlled by the signal and is inversely proportional. 10. The power supply device of claim 9, wherein the size of the spectrum is controlled by the level signal. When the level signal is increased, the spectrum range is relatively narrow; otherwise, when the bit is The spectral range is relatively wide when the quasi-signal is reduced. The power supply device of claim 1, wherein when a load is high, the level signal is decreased; when a load is low, the level signal is increased. 12. The power supply apparatus of claim 5, wherein when the load is reduced, the switching frequency is lowered and the spectrum range is also narrowed. When the load is increased, the cut frequency will increase and the spectrum shaping range will also be widened. 13. The power supply apparatus of claim 12, wherein the spectral range produces the same change with the switching frequency. K. The power supply device of claim 12, wherein the spectrum shaping control is applied to all operating ranges, and the spectral range is changed as the switching frequency changes. 15. If you apply for the electric wire set in the M专, you can get a good EMI suppression in all working frequency ranges. 16. The power supply device of claim 0, wherein a circuit for the change is applied. 17. An electrical savvy device having a spectrum range comprising: - a primary loop 'generating a quasi-signal; and a spectrum reshaping hua's Weilu Zhuncheng, recording a lion scale to change the frequency I». a power supply device having a spectrum range, comprising: a main circuit having a parameter; and a number of connections, and modulating the frequency according to the parameter, wherein the device has a range of:曰 Remodeling the module, receiving a quasi-signal and modulating the multi-Ρε» according to the quasi-signal. A spectrum modulation method for modulating - including: a spectrum range of a power supply device, the method includes receiving a level signal; and adjusting the Wei error range according to the level. S 21