TWM288389U - Switching control apparatus whith output power compensation - Google Patents

Description

M288389 IX. New Description: The technical field of the new β η r belongs to the system] One~1 This creation department has a switching type of the power compensation with the wheel, and the special type is used in the power supply. The cycle of the three corpses is limited to the second and the current sense is obtained. _ No. "The system "u Ping 乂 反# as the power supply crying ancient ^ input voltage readout power compensation switching control relay...., low [previous Technology] ^ _ P WM is the technology of _f knowing to control and stabilize the output power. The power supply must provide various protection functions, such as over-confidence, over-current and over-current. Over-current and over-current The surface protection system protects the power supply and peripheral circuits to avoid permanent damage. The over-protective towel, designed with output power compensation, is the power supply = the same overload protection point for high and low input voltages. Referring to the figure - Figure ' is a schematic diagram of a conventional power supply circuit. The power supply uses a PWM controller % to control the switching of the power switch Qi:: The detection resistor RS is connected in series with the power switch Q1 for obtaining the flow The primary side of the power switch h switches the current Ip, and the resistance value of the detecting resistor Rs is used to determine the maximum output power of the power supply. The primary side switching current h flows through the detecting resistor RS and is detected on the resistor Rs. A current sensing signal Vcs is generated. A current sensing terminal VS of the WM controller Ui is connected to the detecting resistor, and receives the current sensing signal vcs, and the traveling power limiting comparator 130 and a maximum power limiting voltage VM are received. For comparison, if the current sensing signal vcs is greater than the maximum power 5 M288389 Correction 94 9. Supplement I this year Λ 8Γ:= Vm, WM controller Ui will periodically ^^ VPWM wheel, and then limit and decide, Wendian is willing to take Yingjie's maximum output power. The first picture of the multi-test, when the power switch Q guide W thousand MW ' stored in the transformer Tl package 旎 ε can be expressed as:

A 2

X

Lpxi2p=PxTs 0) Machine over transformer Tl primary side switching current Ip can be expressed as.

Vt X/maximum wheel power P can be expressed as: (2) 2xLp^Ts (3) = where wLp is expressed as the transformer-to-secondary switching current inductance value; U is the power switch Q1 when it is turned on, the driving signal V It should be k time; TS is the switching period of the drive signal VpwM. From the above formula (7), it can be seen that the magnitude of the input voltage will affect the switching current 1P of the transformer Tl-sub-side. The higher input is still faster, the lower 22 and the lower speed. The current sense signal Vcs is compared with the maximum power limit %, and (4) the maximum output power 关 of the off-surface supply ϋ. The above formula (3) can be known that the power supply pulsing power ρ is 2 and the material switch Q1 is conducting time t. "When the input voltage VlN has m thinking to J female safety (the actual power supply of the power supply in the Vin range is 6 modified M288389, supplemented by 90Vae to 264Vae, and between high and low input voltage. ..... and the feedback control loop through the power supply can automatically adjust the on-time W' to obtain a fixed value of the output power p (four). That is to say, when the current sensing signal ~ is higher than the maximum power limit light VM, the maximum on-time will limit the text at this time, and the limit of the transformer Tr secondary side switching current is matched with the first picture, please refer to the second figure. It is a singularity diagram of the difference of the output power (low compensation) at the low input voltage caused by the delay time of the known transmission wheel. The power limit of the conventional gamma is the most frequent cut rate _ light electric fresh bit and the electric field measurement terminal vs. the current signal Vcs (10) the parent 1 is the current sensing terminal vs. the current sensing signal Vcs is greater than the work V The device output terminal 0υτ stops the wall drive signal rate p/, Ql 'used to determine and determine the maximum output power of the power supply H =, the maximum output power is also affected by the PWM controller A transmission delay == kg. Referring to the second figure, the power supply has a fixed maximum power sense of 1 = Lu VMT. When the high input power plant is working hard, it will produce a steeper current UCS, and the HV and the continuous conduction time ton are shorter driving signals. With the dragon, will Zhao _ slow current k CS'LV and continuous conduction time W longer driving signal MXV, when the current sensing signal ~ higher than the maximum power limit electric i Μ, the PWM controller α The drive signal U is corrected by a 7 correction + 94· 9· 29 supplement “ Λ . M288389 t transmission delay shot. The money transmission delays the QA hold, and will continue to pass power == turn on ^ equal to... whether it is In the ::: :=: in the same power supply 'its' pressure supply two power supply under high input voltage, the actual power limit of the electric ground hitting than the low input voltage when the power limit voltage v high The output power P that causes the power supply to cause output power at high and low input voltages is as follows: 八向贝 NX(t〇n +^)2 (4)

2xLpxT compares equations (3) and (4) above, because the propagation delay of the PWM controller core will increase the excitation current by more than the theoretical value (Vin / , therefore, at high input voltages, there will be a comparison with low input voltage Large power limit system: voltage. Although the transmission delay time td is very short, usually between the fine ns to the S and the switching frequency, the transmission delay time h is the output power caused by the high and low input voltages. The difference will be more intensified. [New content] There is a clock in this 'this creation is used in the power supply of the output power compensation, switching control relay, in the power supply for the charm of the use of periodic three-stage limit signal to obtain The current signal is used for comparison operation to achieve the compensation of the output power of the power supply at high and low input voltages. M288389 In the switching controller of the output power compensation of the present invention, the flow-power is operated through a detection resistor. The power supply of the door is used as a switching action for controlling the power switch. The secret T-side switching electric-oscillator connection - wave ❹ ^, the type of control is set using a pulse-value vibrator round-tooth wave signal - - Pulse wave sub-transfers the sawtooth wave signal to the waveform to generate a cry.: Converts the mineral tooth wave signal into a periodic three-stage limit signal wheel output ratio / 兀, connected to the detection resistor and the waveform generator, Receiving an electric 2rd 3 periodic three-segment limit signal for rotation-reset signal t==I output W' is connected to the comparison unit, the stitcher and the power switch, and receives the reset job and secret The wave signal, the pulse signal is generated to output a driving signal to the power switch, and is used as a compensation for the output power of the power supply device with high and low input power. Prior to the power supply, the power is transmitted through the first-side switching current of the power-off, and a current sensing signal is obtained on the detecting resistor; and then the waveform generator provides a periodic three-segment limiting signal. First, a voltage rise signal ' is provided in a signal cycle and compared with the power down signal; the waveform is generated and then a voltage limit signal is provided and compared with the current sense signal. The waveform generator finally provides a voltage drop limit signal 'and compares it with the current sense signal. 9 M288389 So the 'supply of the power supply at high and low input voltages, the system and the voltage rise limit signal The comparison operation is compensated for different output powers as the source and source _ heart high and low input voltage. The voltage limit signal is provided in the electric dimorph generator to limit the power consumption. Moreover, the creation uses the waveform generator Provide electric relay, d domain 'to limit the maximum power of the power supply in the low input (four). 'To reduce the power supply ϋ under the low input voltage too large cycle caused by the output power. The above summary of f=r' and the detailed descriptions below are all examples of the scope of patents in this creation. The purpose and advantages of this creation will be explained in the following explanations and illustrations. . [Embodiment] The second picture of the mouth tea test is the circuit diagram of the power supply used in this creation. This creation has a switching control relay with output power compensation, which is used in the 2 source supply. The power supply wire uses the switching control device of the present invention to switch the power switch Q1 to the transformer T1. At the same time, the detecting resistance ^ power switch Q1 is connected in series, and the wire is passed through the secondary side _ of the power switch Q1 to generate a current sensing signal Vcs. The switching control device of the present invention obtains the current sensing signal Vcs through the detecting resistor Rs, and controls the switching operation of the power switch Qi after the operation. M288389

This creation uses an oscillator 50 to connect a waveform generator 6〇, oscillator 5〇

A sawtooth signal VSAW and a pulse signal PLS are output, and a sawtooth signal 传送 is transmitted from the ~ to the waveform generator 60. The waveform generator 6 receives the sawtooth wave signal vSAW for outputting a periodic three-segment limiting signal Vlmt. At the same time, a comparison unit 200 is connected to the detecting resistor Rs and the waveform generator 6〇 to receive current. The sensing signal vcs and the periodic three-segment limiting signal Vlmt are used to output a reset signal RST; and a synchronous signal output unit 27A is connected to the comparing unit 200, the oscillator 50 and the power switch Qi. Receiving the reset signal RST and the pulse signal PLS for synchronizing the pulse signal PLS and outputting a driving signal VPWM to the power switch (^.

Referring to the third figure, in an embodiment of the present invention, the comparing unit 2 is a power comparator 230, a positive end of which is connected to the waveform generator 6〇, and a negative terminal is connected to the detection. The resistor Rs, the output terminal is connected to the synchronous signal output unit 270. In this embodiment, the present invention uses the power comparator to receive the periodic three-segment __Vlmt and the electric domain number Vgs, and compares them into a comparison operation, and outputs the control enable signal Vqc (ie, The signal is sent to the sync signal output unit 270. Referring back to the third figure, in another embodiment of the present invention, the comparing unit is further connected to one of the power supply terminals FB of the power supply for recovering the 矾% 矾V Vb. The comparison unit 2 includes the power comparison II 23〇 of the previous embodiment: 4, and includes: - pulse width modulation control 11 M288389

The unit 240 is connected to the negative terminal of the power comparator 230, the detecting resistor Rs and the voltage feedback terminal FB, and receives the current sensing signal Vcs and the feedback voltage signal vFB, and outputs an adjustment after the internal comparison operation. The variable signal vOP is connected to the power comparator 230, the pulse width modulation control unit 240, and the synchronous signal output unit 270, and receives the control enable signal Voc and the modulation signal VOP for output. The signal rST is reset to the sync signal output unit 270. In this embodiment, the present invention uses the logic circuit 250 to output a reset signal _RST to the synchronous signal output unit 270. The synchronous signal output unit 270 can synchronize the pulse signal PLS and output the drive signal vPWM to the power switch. Qi, for switching control. In conjunction with the third figure, please refer to the fourth figure, which is a schematic diagram of the internal circuit of the creative waveform generator. The waveform generator 60 includes a first voltage-to-current conversion unit 61 connected to the oscillator 5, receives the sawtooth wave signal Vsaw, and converts the voltage value of the sawtooth wave signal vSAW into a sawtooth current Isaw, where Ra It is the resistance value of the first voltage to current conversion unit 61. The first current mirror is composed of a first transistor 6〇1 and a second transistor 602. The first current mirror is formed by a first transistor 6〇1 and a second transistor 602. The interpole of the first transistor 601 and the second transistor 602: connected to the 'electrode transistor' is connected to its gate. First - voltage ramp 12 M288389 Correction Supplement ^94 9. 29 The current conversion unit 61 outputs the sawtooth current

Isaw flows into the drain of the first transistor 601 and the drain map of the second transistor 6G2 produces a "first" map current ,, the value of which can be obtained by the following equation. h=^iXlSAW (6) where % is the mapping ratio of the first current mirror. The first transistor 6〇 is also connected to the source of the second transistor 602 and is further connected to a limiting current source

It. Therefore, the maximum current value of the first-mapped current h of the first-current mirror output is limited by the limiting current source Ιτ.

The NixIsaw^It (7) waveform generator 60 further includes a second voltage-to-current conversion unit 62 that receives the reference voltage vREF' and converts the voltage value of the reference v into a reference current IREF, which can be expressed as:

Iref=Vref/Rb (8) where Rb is the resistance value of the second voltage pair current conversion unit 62. A second current mirror is coupled to the second electrical (four) current converting unit 62 for receiving the reference current Iref, and the second current mirror is comprised of a third transistor 6〇3 and a fourth transistor 6〇4. The source of the third transistor 6〇3 and the fourth transistor 6〇4 is connected to the ground GND'. The second transistor 6〇3 is connected to the gate of the fourth transistor_. The drain of the second transistor 603 is connected to its gate. The reference voltage output by the second voltage pair current conversion unit 62 is 13 M288389 drain of the third transistor 6〇3, and is added in the fourth electrical correction to the 9t K. , ^ I2 = N2xIref (9) where N2 is the mapping ratio of the second current mirror. The fifth transistor 605 and the - sixth transistor 606 constitute a third current mirror. The fifth transistor 605 and the source of the sixth transistor 606 are connected to one:: the idler phase of the fifth plasma 605 of the electric dust and the sixth transistor _: the drain of the fifth transistor 6G5 Connect to its gate. The first mapping tape scoop and the second mapping current 12 flow into the drain of the fifth transistor 6〇5, and are generated at the drain mapping of the transistor 606—power_money w. The power limiting current Ilmt can be obtained by the following formula . (10) ^ΜΤ=Ν3Χ(ΐ! + 12) where Ν3 is the mapping ratio of the third current mirror. The power limit current ^

Flow through the power limiting resistor rlmt' to generate the periodic three-segment limiting signal VLMT, as shown in equation (11):

Vlmt^IlmtXRlmt Please refer to the fifth ® ' to generate H internal circuit waveforms for this creative waveform. With the above formula (5) to equation (7), it can be known that the first mapping current is generated by the sawtooth current ISAW according to the mapping ratio of the first current mirror, so during the period ία, the first mapping current l and The waveform of the ore tooth current w is the same as the slope. However, during the time τντ2, the ore tooth current w 14 is corrected by +94 9·29. This year, β M288389 continues to grow, and the first-handsome current [New Zealand (four) mapping current h is stabilized at a fixed potential value Ith. Wait until time ^ - map current ^ is restored again with the return wave current Isaw and the first - electric =, = (four) mapping. Thus, the waveform of the "first-map" is a two-stage waveform output type. Furthermore, in conjunction with the above formula (10), the power limiting current (10) is summed by the first mapping current ^ and the second mapping current l2, and is mapped by the mapping ratio N3 of the third current mirror. The second mapping current l2 is to pull the potential of the first mapping current ^ to the first mapping power W after the pulling high potential, and then map the ratio N3 of the third current mirror to generate the power limiting current lLMT, and the power limiting current is ^ The waveform is also a type that exhibits a three-segment waveform output. And in conjunction with the foregoing formula (1)), the power limiting current ILMT flows through the power limiting resistor Rlmt to generate the periodic three-stage limiting signal vLMT. The present invention specifically uses the waveform generator 60 to output a periodic three-segment limiting signal VLMT' for comparison with the current sensing signal Vch乍. In the periodic three-stage limit signal VLMT-signaling, the periodic three-stage limit signal is composed of a voltage rising signal, a voltage limiting signal, and a voltage drop limit Λ3. The power supply ϋ 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高 高Regardless of the power supply wire for high or low input voltage (actual input 15 M288389 corrections 94 „9· 29 | supplement this... The input voltage VIN range is from 90Vac to 264Vac), current signal ^^ periodic three-stage limit domain Vlmt (4) The upper disambiguation system is reduced for comparison operation. The current sensing signal Vcs, hv, which is recorded by the power supply wire under the voltage of the human being, will report the fast top to the periodic three-stage limit signal ν[Μτ voltage rise limit= Compared with the county, the flu-sounding screaming Vgslv, which has a lower slope of the singer's voltage, will be compared with the screaming of the three-segment limit. 'When the high input voltage produces a higher slope, the current sense signal Vcs'hv or the low input voltage produces a slope compared to (4) the current (four) signal VC· = the voltage rise limit signal of the periodic three-stage limit signal VLMT Instantly, the power supply 11 makes (four) PWM (four) ϋ %, __ VPWM will pass after a transmission delay time td. During this transmission delay time td, the power switch Q4 continues to conduct 'and will continue to transmit power. At the same time, in the same Power supply The size of the td between the extensions is the same. In the above description, the current sense signal Vcs Hv with a higher slope first rises to the peak of the three-stage periodic limit signal Vlmt __, and the drive signal VPWM, HV, will After the - segment transmission delay _ td will be closed, and the slope is lower ^ Influenza test signal V coffee is less than the three-stage _ 峨 VLMT dust rise limit signal, and the drive signal VPWMLV will be relatively large, and after a transmission After the delay time td will be cut off. 16 Correction 94 9· 29 Supplement II with β M288389 Use periodic three-stage limit signal Lu ------ Tiger Vlmt voltage rise limit signal as a private system of high-quality supply The low-input human-powered lion's material can make the slope of the ^ sense signal ~, HV or the lower current sense sew in the Becker transmission (four) day pick (four), with the relevant actual power limit point b P can supplement the output power difference caused by the high and low input voltage of the stomach power supply, so that the power supply H can work at the input voltage of different high and low voltages, and the same output power can be obtained. The third picture, refer to the fifth picture When the input voltage of the power supply is too low (continuously transfer the load below 7Gvae), it establishes a slow speed by switching the current 1P on the primary side of Q1, so that the current feedback signal vcs, BO is slowly established. When the input voltage of the power supply is too low, the current feedback signal ves, (10) 'will be limited by the voltage drop of the three-phase _ V V of the riding ship', and then the power switch Qi will be cut off early. The sixth test is a block diagram of the creative waveform generator. The waveform generator 60 includes: a memory unit 6 〇 8 for storing a plurality of sets of digital data; and - a digital pair analog conversion ^ _, The memory unit 608 ′ is configured to convert the digital data in the memory unit 6 〇 8 into an analogy according to the pulse signal PLS. The periodic three-stage limited signal memory unit 70 608 can be a read-only memory ( ROM), can pre-program a lot of digital data, and through the digital pair analog converter 6〇9 in each of the pulse signal pLS into 17 corrections 94. 9. 29 n this year Λ I add M288389 Produce - tonnage f material to provide digital pairs Turn ratio converter 609 i ^ of the periodic analog signal Yi in salt export restrictions three sections. The second picture of the tea test, the next step is to explain the method used in the power supply for the compensation of the power supply, and the compensation method (4) to take the first check of the Wei supplier "IL sensing signal Vcs; then generate by the waveform The device 6 provides a three-stage limit signal with a voltage rise limit signal, a voltage limit signal and a voltage drop limit signal, and compares it with the current sense signal to the power rate 咏3230. In this way, the t source supply is higher and lower than the voltage of the voltage rise limit signal 2^. The power supply can achieve the same input signal at high and low input voltages. The waveform generator 6 can also be used to provide a three-stage limit signal system (4) for comparison with the current sense signal Vcs. Limit Vcs for comparison operation, use the wheel to enter, the duty cycle of the drive signal of the power supply. In the above description, if the current sense signal Vcs is higher than this, or the voltage rise limit signal or the voltage drop limit signal system control power is turned out, it is compensated for riding out. In view of the above, this creation is used for the switching of the power supply. It is necessary to use the wheel-out power compensation in the power supply. 18 Correction Supplement M288389

This VA limit _ 舆 舆 烕 烕 烕 ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ In the case of different human voltages, the resulting round-out is different from the output power consumption. +, However, as mentioned above, the details of the specific embodiment of the present invention are only the details of the brother-in-law 14 'only the characteristics of this creation are not limited to this 'not to limit the creation of this creation' The application for patents of the side should be subject to the patent application. The spirit of the franchise in the scope of application for the creation of this patent and the actual change of the coffee, are purely included in the creation of the _ _ _ _ _ _ _ (4) in the field of Lai Light variations and modifications may be covered by the patents in this case below.

19 M288389 Revised 94%%29β Supplement [Simple Description] The first figure is a schematic diagram of a conventional power supply circuit; the second figure is a schematic diagram of the difference in output power limit level between high and low input voltage caused by the known transmission delay time. The third diagram is a schematic diagram of the circuit used in the power supply for the creation; the fourth diagram is a schematic diagram of the internal circuit of the waveform generator used in the creation; the fifth diagram is a schematic diagram of the internal waveform of the waveform generator used in the creation; and #六The figure is another block diagram of the waveform generator used in the creation. [Main component symbol description]

Ui PWM controller (^ power switch is the transformer Rs detection resistor (^ power switch ® is the transformer

Rs detection resistance 50 oscillator 60 waveform generator 61 first voltage to current conversion unit - 62 second voltage to current conversion unit 200 comparison unit 20 M288389 correction 1 94 9 · 29 this year month 补充 supplement 230 power comparator 240 pulse Wide modulation control unit 250 logic circuit 270 synchronous signal output unit 601, 602, 603, 604, 605, 606 transistor 608 memory unit 609 digital to analog converter

twenty one

Claims (1)

M288389 Amendment to supplement this 9W9b X. Patent application scope: 1.- Kind of urban control relay with wheel power compensation, used in the primary side source of power switch, warehouse; read, you also have a detection resistor The switching current flows through a switching current comprising: a vibration output of the vibration signal and a pulse signal; the waveform generator is coupled to the oscillator to receive the mineral tooth signal for output A periodic three-segment limiting signal; an early 7C, connected to the detecting resistor and the waveform generator, is received. a current sensing signal and the periodic three-segment limiting signal for outputting - resetting the signal, and a synchronous signal output unit, connecting to the comparing unit, the device and the power switch to receive the reset The signal and the pulse signal are stepped on the pulse wave to reduce the wheel-driving signal to the power switch. 2. The switching control device with output power compensation according to claim 1, wherein the comparison unit is a power miso, wherein the positive terminal is connected to the wave of the active H, and the negative terminal is connected. For the job, the output is connected to the synchronous signal output unit. 3. The switching control woven fabric with output power compensation as described in claim 1 of the patent scope, the comparison unit of the towel is further connected to a voltage feedback terminal of the power supply, including: 22 M288389 The power comparator is connected to the waveform generator and the detecting resistor, and receives the current sensing signal and the periodic three-stage limiting signal for rotating a control enabling signal; a unit connected to the detection resistor and the voltage feedback terminal 'receiving the current sense signal and the feedback voltage minus, the output_modulation signal; and the -logic circuit' is connected to the power comparator, The pulse width modulation control unit and the synchronous signal output unit receive the difficult function and the modulated signal to transmit the signal to the synchronous signal output unit. 4. If you want to apply for a special $1 rhyme-recording control device, the waveform generator includes: switching the material to the fresh element, and connecting the B-stream; the voltage value of the I-wave signal is turned off. The first-toothed electric current-current mirror is connected to the first voltage-to-current conversion unit and the current source source is limited to the current source. The first-mapping current is limited by the limiting current: generating "di" The mapping current, the reference voltage to the current conversion unit converts the reference voltage into a conversion unit, and the 俾2 is connected to the first current mirror and the second voltage pair current system generates a second mapping current according to the read reference current; The M288389 correction complements the motor mirror, is connected to the first current mirror and the second current mirror, limits the current according to the sum of the second mapping currents of the first-fourth (four) amount; and the current system of the knife-handed current receiving the power limit The material__ is connected to the first stream to generate the periodic three-stage limit signal. 5. The control with output power compensation as described in the patent scope (7) = wherein the periodic three-segment_signal is in the -signal period, including ---rise limit signal, voltage limit signal and voltage The falling limit signal type 22nd nr is the switching gas control device with the input_compensation described in item 1 wherein the waveform generation includes a memory unit, which stores multiple sets of digital data and - training _, even green and fresh field her" Weng (four) conversion _ 24