TWM253032U - Push-pull control signal generation circuit - Google Patents

Push-pull control signal generation circuit Download PDF

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Publication number
TWM253032U
TWM253032U TW93203971U TW93203971U TWM253032U TW M253032 U TWM253032 U TW M253032U TW 93203971 U TW93203971 U TW 93203971U TW 93203971 U TW93203971 U TW 93203971U TW M253032 U TWM253032 U TW M253032U
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TW
Taiwan
Prior art keywords
signal
circuit
unit
connected
control signal
Prior art date
Application number
TW93203971U
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Chinese (zh)
Inventor
Yau-Jen Wang
Original Assignee
Niko Semiconductor Co Ltd
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Priority to TW93203971U priority Critical patent/TWM253032U/en
Publication of TWM253032U publication Critical patent/TWM253032U/en

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M253032 4. Creation Description (l) [Technical Field of New Type] A push-pull control signal generating circuit, especially a switch signal that can output a control signal and directly control the drive of a push-pull circuit architecture, thereby achieving power Conversion and transmission signal generation circuit. [Prior art]

In more and more complicated electronic and computer devices, power supply devices are more important. Power supply devices can be divided into two types: linear type and switching type. Since linear type has many disadvantages, it is At present, power supply devices produced in the industry are all achieved using switching types. The power supply of the backlight source of the TFT panel is mainly based on the use of an inverter circuit that converts DC power to AC power to achieve energy conversion and drive the light emission of the cold cathode fluorescent lamp (CCFL). The conventional inverter circuit is due to the difference in circuit topology. Generally, it is divided into a half-bridge inverter circuit, a full-bridge inverter circuit, and a push-pull inverter circuit. Inverter circuit of alternating current AC.

The reference to the first figure is a schematic circuit diagram of a conventional push-pull converter circuit for driving a load. The transformer T1 divides the circuit into a primary-side pre-stage circuit 101 and a secondary-side post-stage circuit 102. The front-stage circuit 101 includes: a direct / claw power source Vcc, a first switch Q and a second switch, and the like, and the rear-stage circuit 102 includes a load (Load) and the like. In conjunction with the second figure, it is a schematic diagram for the conventional push-pull control signal and the output waveform of the load. The first control signal a and the first control signal b are transmitted to the first switch ... and the second on respectively.

M253032 4. Creation instructions (2) Close control terminals A and B of Q2, and at the same time, control the switching action of the switch Q1 and the second switch Q 2 of the front-end circuit i 〇 丨. The switching action is slightly shifted for the first — Q1 and the second switch Q2 for a short period of time, and alternately (: ^,, for ON / OFF action. The DC power supply vcc of the previous circuit 101 uses ^ $ energy and through the transformer T 1 Step-up and convert the voltage of the DC power supply Vcc to the eight-stage circuit 102 'to drive the load. The transformer τ 1-, / >, the output voltage waveform c is a voltage waveform showing the point C, as shown in the second figure. The output voltage waveform c at the factory and human side is the AC voltage waveform. · Do not refer to the first figure repeatedly. Because of the push-pull converter circuit, the first switch Q1 and the second switch Q2 are slightly staggered. :: Alternately) 0N / 0FF action, so ^ = ^ ground VS :: Segment of dead time shown in the second figure (...-the two switches Q1 and the second switch q2 are turned on at the same time and the control signals a, b needs to be burned in accordance with Zhaocang Gong r τ 2 to device 丨 1. Control the iron t ^ According to the power demand at the load (Load), provide the required lightning Λ 2 for the load (Load): Action to control the signal a and b according to the load (L0ad) force ^ Furthermore, depending on the status of the signal, such as turning out thunder, = Feng invention The operating temperature of the primary circuit is too high, the output voltage is too high, the lamp is open circuited or changed to achieve φ々 and stop the switching of the first switch Q1 and the second switch Q2. "New content f to the circuit protection function. Yes In view of this, its main purpose is to provide a kind of push-pull control signal generation circuit for push-pull commutation; it can provide a control signal and control the switching action of two electronic switches respectively, so that the DC power supply

M253032, creation description (3), becomes the parent current power supply, and is closed through a transformer. Creation-a kind of push-pull control signal generation circuit is provided for use. Connected to the primary side of the transformer, used to control two ;: The secondary side of the sub-switch 切换 switches the high-current power source to an AC power source and transmits it to the transformer ΐ i ^ = using the leakage inductance and capacitance generated by the transformer (° C1, C2, C5) form a resonance network for generating one. # 者 , Using a feedback circuit to draw the load state of the transformer Ⅱ ::, and using this to create a push-pull control signal = 鸲, the output generates a control signal to achieve the circuit and protection. "Bite" for the battle of the electric power adjustment. The power generation path is too high, the switching time is too long, and the time is changed. When the soft-open time is too large to extend the lamp, the author can use a power protection unit. Various conditions on the secondary side (old side) and the operating temperature of this circuit! For example, the output voltage is too low, the lamp tube is open, or the temperature is too hot, etc., and the secondary electrical operation is stopped to achieve the circuit protection function. For the author, this creation uses a static time control unit to obtain a fixed d / ad time to avoid two electronic switches being turned on at the same time and the voltage of the voltage regulator circuit to be burnt. In addition, this creative system can control and change the switching action of the second electronic switch according to the load (power demand, and supply the power required by the load. At the same time, this creative system uses the machine unit to start and switch the second electronic switch. In order to reduce the startup surge current and voltage, which leads to the burnout of the two electronic switches and the life of the tube. "At the same time, the present invention further uses a sample and hold unit to receive the load.

M253032, creation instructions (4) I Load) terminal = voltage feedback signal, and the pulse signal performs the holding action of the voltage feedback signal at each cycle, thereby improving the imbalance of the signal | phenomenon. Implementation Mode Please refer to the third diagram, which is a schematic circuit diagram of the driving load of the creative push-pull control signal generating circuit. The push-pull control signal generating circuit 1 is connected to the primary side of a transformer T1 through two electronic switches Q3 and Q4, and is used to control the opening and closing of the two electronic switches Q3 and Q4. The push-pull control signal generation circuit 1 is connected to the secondary side of the transformer TL ^ through a feedback circuit 2 to obtain one of the feedback signals of the load 5. At the same time, I is connected to a power supply unit 4 to obtain a working power Vdd (not labeled). Push-pull control signal generation | Circuit 1 outputs two control signals from the first output terminal DRV1 and the second output terminal DRV2, and controls the opening and closing of the two electronic switches Q3 and Q4, respectively, and is used to provide a direct current from the power supply unit 4 The power DC is converted into an alternating current power AC to provide load use. In the above description, the load is a cold cathode fluorescent lamp (CCFL). "In conjunction with the third figure, please refer to the fourth figure, which is a schematic circuit diagram of the push-pull control circuit for this creative push-pull control. This creative push-pull control signal generating circuit, 1 ', is connected to a first output terminal DRV1 to The control of the electronic switch Q3 is connected to the control terminal of the electronic switch through a second output terminal DRV2, (勹 The feedback terminal FB and a detection terminal CLAMP are connected to the feedback circuit at the same time. A AND gate logic unit 112 is used to make a logic circuit. A second AND gate logic unit 114 is used to make a logic operation. A protection unit 124 is connected to the first AND gate logic unit 112 and M253032 on page 9. 4. Creation instructions (5) The second gate logic unit 1 14 is connected to the feedback circuit 2 ′ of the third figure by using the detection terminal CLAMP and connected to the secondary side of the transformer T1 through the feedback circuit 2; A waveform generator 11 〇;-a clock generator 1 06, connected to the waveform generator 110 and the first AND gate logic unit 112, and connected to the second AND gate logic unit 114 through an anti-gate 122; a Soft boot unit 102, connected to the clock generator 1 6, for performing a booting operation; a sample-and-hold unit 108, which is connected to the feedback circuit 2 via a voltage feedback terminal FB through an error amplifier 12 6; a first comparator 116, which is connected to the soft-start unit

I 0 2 and the waveform generator 1 1 0; an OR gate logic unit 1 2 0, connected to the soft-start unit 102, the first comparator n6, the first AND gate logic unit II 2 and the second and The gate logic unit 4 is a logical operation of performing OR; a second comparator 118 is connected to the sample and hold unit 108, the waveform generator 110, the first and gate logic unit Π 2 And the second AND gate logic unit 114; and a static time control unit 104, connected to the waveform generator 110, the first and gate logic unit 112 and the second and gate logic unit ° 114 ° in the above description ' This creative push-pull control signal generating circuit includes a constant current source 128, which is connected to the error amplifier 126 'via a switch sw for supplying & a fixed current. At the same time, it also includes a

The voltage adjusting unit 130 is connected to the power supply through a working power supply terminal VDD = Yuan 4 to obtain a DC power supply for supplying the power VCC required for the push-pull control signal generating circuit 1 to work. $ Generation In the above description, this creative push-pull control signal generation circuit protection unit 1 24 includes: a low-voltage protection- ▼ life >

M253032 f. Creation instructions (6) Guaranteed axis information a. The whole g. The production is guaranteed to be maintained until h. The parallel circuit, an overvoltage protection circuit, and an open-tube protection circuit. At the time, the soft-start unit 1 02 of the push-pull control signal generating circuit 1 of the present invention includes a counter and a digital / analog converter. Please refer to the fifth figure, which is a schematic diagram of the internal signal waveform of the push-pull control σ signal generating circuit for this creative work. The horizontal axis is the time (t) axis, and the vertical axis is the voltage (v) axis. As shown in the fifth figure, the internal signal waveforms of the creative push-pull control signal generation circuit include: a voltage feedback signal> a voltage feedback hold signal b, a sawtooth waveform signal C, and a static time adjustment; Flood signal d, a second comparison signal e, a count signal f, a or gate signal clock signal h, a first control signal 丨, a second control signal], a start signal k and a first comparison signal m . In conjunction with the fifth picture, please refer to the fourth picture. This book creates a push-pull control signal. * If n is small, 1 circuit is connected to the circuit. 1 uses a sample-and-hold unit. 08 Through the error amplifier. 26 Connected via the voltage feedback terminal FB. Go to the feedback circuit 2 shown in the third figure to get the feedback signal. The feedback signal is a voltage feedback signal a. The sample and hold unit 108 performs a stable operation of the voltage feedback signal a so as not to drift, and at the same time outputs a voltage feedback signal b to the second comparator 118. The holding unit 108 is based on the clock signal h of each cycle to keep the stable operation of the feedback signal a, and then the output voltage feedback protection waveform generator ι10 outputs the sawtooth waveform signal c and transmits Λ The generator τη causes J to find the clock signal. The 106 output clock signal is generated, and the waveform signal C is simultaneously transmitted to the static time control. 〇4 The control unit 1 04 outputs the static time adjustment day # ^ Η β I /

Sent to the second comparator U8, the first =; the tine / shape signal C. The first one compares Is 1 1 8 and compares the sawtooth wave M253032

The shape signal c and the voltage feedback hold signal b, and then output the second comparison signal e ° complex with the fifth picture, please refer to the fourth picture, this creative push-pull control signal generation circuit 1 soft boot unit 1 02 is received The clock signal h is used to count the preset circuit startup time based on the clock signal h using an internal counter. The digital signal after counting is processed by the ^ bit / analog converter in the soft boot unit 102, so that the digital signal is converted into an analog signal output, and the analog signal is a counting signal f. At the same time, when the preset circuit start-up time of the soft-start unit i 02 has arrived, the start-up signal% output by the soft-start unit 102 is changed from a low potential to a high potential. Combined with the fifth figure, please refer to the fourth figure. The first comparator 116 of the push-pull control signal generating circuit 1 of this creative system receives and compares the sawtooth waveform signal c and the count signal f, and then outputs the first comparison signal m. And transfer to OR logic unit 1 2 0. The OR logic unit 120 receives the start signal k and the first comparison signal m at the same time, and outputs the OR signal g. Combined with the fifth diagram, please refer to the fourth diagram. The first and gate logic unit Π 2 of the push-pull control signal generation circuit 1 in this creative receives the clock signal h, or the gate signal g, the second comparison signal e, and the static signal. The protection signal transmitted by the signal pole circuit protection unit 124 is adjusted in time, and an AND operation is performed to output a first control signal i. At the same time, the second and gate logic unit 114 receives the gate signal g, the second comparison signal e, the static adjustment signal 廿 and the protection signal transmitted by the circuit protection unit 1 24, and receives the clock signal h through the back gate 22 . The second AND gate logic unit 114 performs an AND operation on the received signal to output a second control signal j.

M253032 IV. Creation Instructions (8)

With reference to the fourth figure, please refer to the fifth figure. At time t 0 -11, the sawtooth waveform signal c outputs the static time adjustment signal d and the clock signal through the static time control unit 104 and the clock generator 106 respectively. h. The static time of the static time adjustment signal d is td. At this time, the clock signal h is at a high potential. Since the voltage feedback holding signal b is larger than the sawtooth waveform signal c, the second comparison signal e output by the second comparator 1 1 8 is high. In addition, the sawtooth waveform signal c is greater than the counting signal f, so the first comparison signal m output by the first comparator 1 16 is a low potential. At the same time, since the preset startup time has not yet arrived, the startup signal k is at a low potential. Because the start signal k and the first comparison signal m are both at a low potential, the OR signal g output by the OR logic unit 120 is at a low potential. Therefore, at the time 10-11, the first control signal i and the second control signal j output by the first and second logic circuits 112 and 114 are low. In conjunction with the fourth diagram, please refer to the fifth diagram. At time 11-12, at this time, the clock signal h is at a low potential, and the signal d is adjusted to a low potential at rest. The control signal output by the circuit is the same as the time 10-11, that is, the first control signal i and the second control signal j output by the first and second logic circuits 1 12 and 1 4 are both low. Potential.

In conjunction with the fourth figure, please refer to the fifth figure. At time 12 -13, the clock signal h is still at a low potential, and the signal d is adjusted to a high potential at rest. Since the voltage feedback holding signal b is still larger than the sawtooth waveform signal c, the second comparison signal e is high. In addition, the sawtooth waveform signal c is smaller than the count signal f, so the first comparison signal m output by the first comparator 1 16 is a high potential. At the same time, since the preset startup time has not yet arrived, the startup signal k is at a low potential. because

Page 13 M253032 4. Creation instructions (9) The start-up signal k and the first comparison signal m are both at high potential, so the OR signal g output by OR logic unit 1 2 0 is at high potential. Therefore, at time 12-13, the first control signal i output by the first AND gate logic circuit 112 is still a low potential, and the second control signal j output by the second and gate logic circuit 114 is a high potential. In conjunction with the fourth diagram, please refer to the fifth diagram. At time 13 -14, the control signal output by the circuit at this time is the same as that at time t 0 -11, that is, the first AND gate logic circuit 112 and the second AND gate logic circuit. The first control signal i and the second control signal j output by 11 4 are both low. In conjunction with the fourth diagram, please refer to the fifth diagram. At time 14-15, at this time, the clock signal h is at a high potential, and the signal d is adjusted to a high potential at rest. Since the voltage feedback holding signal b is greater than the sawtooth waveform signal c, the second comparison signal e output from the second comparator 118 is high. In addition, the sawtooth waveform signal c is smaller than the count signal f, so the first comparison signal m output by the first comparator 1 16 is a high potential. At the same time, since the preset startup time has not yet arrived, the startup signal k is at a low potential. Because the first comparison signal m is high, the OR signal g output by the OR logic unit 120 is high. Therefore, at time 14-15, the first control signal i output by the first AND gate logic circuit 112 is a high potential, and the second control signal j output by the second and gate logic circuit 114 is a low potential. In conjunction with the fourth diagram, please refer to the fifth diagram. At time 15 -16, the control signal output by the circuit at this time is the same as that at time 10 -11, that is, the first and gate logic circuit 11 2 and the second and gate logic circuit 11 The first control signal i and the second control signal j output by 4 are both low.

M253032 IV. Creation Instructions (10) In conjunction with the fourth picture, please refer to the fifth picture. At time t 6 -17, the clock signal h is at a low potential, and the signal d at rest is adjusted to a high potential. Since the voltage feedback holding signal b is larger than the sawtooth waveform signal c, the second comparison signal e output by the second comparator 1 1 8 is high. In addition, the sawtooth waveform signal c is smaller than the count signal f, so the first comparison signal m output by the first comparator 1 16 is a high potential. At the same time, since the preset boot time has not yet arrived, the boot signal k is low. Because the first comparison signal m is high, the OR signal g output by the OR logic unit 120 is high. Therefore, at time 16-17, the first control signal i output by the first AND gate logic circuit 112 is a low potential, and the second control signal j output by the second and gate logic circuit 114 is a high potential. In conjunction with the fourth diagram, please refer to the fifth diagram. At time 17-18, the control signal output by the circuit at this time is the same as that at time t 0 -11, that is, the first AND gate logic circuit 112 and the second AND gate logic circuit. The first control signal i and the second control signal j output by 11 4 are both low. In conjunction with the fourth diagram, please refer to the fifth diagram. The time 10-18 is the startup time of the circuit. After time 18, the first control signal i and the second control signal j output by the first and second logic circuits 112 and 112 are subject to the clock signal h, the static time adjustment signal d, and the first Second, the effect of the comparison signal e changes. In the above description, at time 18:00, the circuit reaches the preset startup time. At this time, the startup signal k rises from a low potential to a high potential. Therefore, the OR signal g output by the OR logic unit 120 is high. Potential, so the first control signal i of the circuit is adjusted by the clock signal h and the static time after the power is turned on.

Page 15 M253032 Fourth, the creation instruction (π) d and the logical operation of the second comparison signal e are obtained. After the second control signal j is turned on, it is obtained by the logical operation of the reverse clock signal h, the static adjustment signal d, and the second comparison signal e. In conjunction with the fourth diagram, please refer to the fifth diagram. The circuit protection unit 12 4 detects the working condition of the load 5 and the operating temperature of the circuit generated by the present invention through the feedback circuit 2 shown in the third diagram. When the voltage is too low, the voltage is too high, or the lamp cannot be turned on, and the circuit is open, and when the operating temperature of the circuit of the present invention is overheated, the circuit protection unit 1 2 4 series will start to operate. The circuit protection unit 1 2 4 includes: a low-voltage protection circuit, a temperature protection circuit, an over-voltage protection circuit, and an open-circuit protection circuit for the circuit. The feedback circuit 2 obtains a feedback signal, and outputs a disable signal to the The first AND gate logic unit 1 12 and the first AND gate logic unit 1 1 4 enable the first control signal i and the second control signal j output by the circuit to be disabled and stop the operation. In the above description, when the load 5 is over voltage, the over voltage protection circuit controls the switch SW to be turned ON, so that the fixed current of the constant current source 1 28 can flow into a resistor (not labeled), and then obtain a ratio of the reference voltage. Vr is also high voltage. At this time, the voltage feedback signal a output from the error amplifier 12 6 is reduced to a low potential. Therefore, the voltage feedback maintaining signal b is simultaneously at a low potential, and the second comparison signal e output from the second comparator 118 is at a low potential, so that the first AND gate logic unit 112 and the first AND gate logic unit 11 The first control signal i and the second control signal j output by 4 are in a low-potential disabling state, and the overvoltage protection of load 5 is achieved. As explained above, after the over-voltage fault is removed, the over-voltage protection circuit controls the switch SW to open (OFF). At this time, the circuit returns to normal.

Page 16 M253032 Creative Instructions (12) Working status. As mentioned above, this creation of a bismuth lifting bucket * w ^ ^ can provide two control signals, # 八 = ^ 1 flood generation circuit, the switching action of its electronic switch: same; pull-type converter circuit two亓 ^ ^ m ^ ^. Π ^ This creative system can use the power protection and the working circuit of the invention to produce a stringent work. &Quot; J Load various conditions for the rotation t μ $ $, # $ M 2 Γdegree column such as output The voltage is too low, electricity or temperature is too hot, etc., and the switching action of the two-prong switch is stopped to achieve the function of circuit protection. The author / the author created the static time control unit to obtain a fixed static time transformer (Γ16) to prevent the two electronic switches from turning on at the same time and causing damage. In addition, the creation can change the switching action of the two electronic switches according to the f Γ system required by the power demand at the load end to provide the load electronic μ-off force. At the same time, this creation uses a soft-start unit to switch between the two electric sweat stomachs, thereby reducing excessive surge currents and currents at startup, which can cause burnout of the electronic switch and extend the life of the lamp. ^ The present invention further uses a sample-and-hold unit to receive the load (press back, voltage feedback signal, and execute the electric signal at each cycle of the signal ^ λ to maintain the action 'to improve the conventional output to the load The imbalance phenomenon of the signal. The above-disclosed schemes and descriptions are only the modification of the embodiment of this creation. Those skilled in this art can make other kinds according to the above description ~? It still belongs to the creative spirit of this creation and the scope of the following patents.

M253032 The simple illustration of the diagram does not explain. The first diagram is a schematic diagram of a conventional push-pull converter circuit driving a load. The second diagram is a conventional push-pull control chip output control signal and a waveform diagram of the output voltage of the load terminal. The third picture is a circuit diagram of a creative push-pull control signal generating circuit to drive a load, and the fourth picture is a schematic diagram of a creative push-pull control signal generating circuit; and

The fifth figure is a schematic diagram of the internal signal waveform of the push-pull control signal generating circuit. Explanation of drawing numbers: Knowing: 1 0 1 pre-stage circuit 1 0 2 post-stage circuit T1 transformer

1 Push-pull control signal generation circuit 2 Feedback circuit 4 Power supply unit 5 Load 1 0 2 Soft start unit 1 0 4 Static control unit 1 0 6 Clock generator 1 0 8 Sampling and holding unit

Page 18 M253032 Brief description of the diagram 11 0 Waveform generator 11 2 First and gate logic unit 11 4 Second and gate logic unit 1 1 6 First comparator 1 1 8 Second comparator 1 2 0 or gate logic unit 1 2 2 Inverter 1 2 4 Circuit protection unit 1 2 6 Error amplifier 1 2 8 Constant current source 13 0 Voltage adjustment unit DRV1 First output terminal DRV2 Second output terminal FB voltage feedback terminal CLAMP 彳 Measure terminal 11 ·!

Claims (1)

  1. M253032 5. Scope of patent application 1. A push-pull control signal generating circuit is connected to the primary side of a transformer through two electronic switches to control the opening and closing of the two electronic switches and convert the DC power to an AC power To provide a load for use, including: a first AND gate logic unit for performing logical operations and outputting a first control signal; a second and gate logic unit for performing logical operations on and And output a second control signal;
    A circuit protection unit connected to the first and second logic units and connected to the secondary side of the transformer through a feedback circuit for receiving a feedback signal; a waveform generator To generate a sawtooth waveform signal; a clock generator connected to the waveform generator and the first and gate logic unit, and connected to the second and gate logic unit through an anti-gate, based on the sawtooth waveform signal Used to generate a clock signal; a soft boot unit, connected to the clock generator, receives the clock signal, and outputs a boot signal and a count signal to perform a boot operation;
    A sample-and-hold unit connected to the feedback circuit through an error amplifier to obtain a voltage feedback signal and output a voltage feedback and hold signal; a first comparator connected to the soft-start unit and the waveform generator , Comparing the sawtooth waveform signal with the counting signal, and outputting a first comparison signal;
    Page 20 M253032 V. Patent application scope-J gate j series unit, connected to the soft boot unit, the first relatively good second gate logic unit and the second and gate logic unit, the boot signal is compared with the first The signal is OR (㈣ 之 Logic Hi device), connected to the sample and hold unit, the waveform generation closed logic unit and the second and closed logic unit, n again, the waveform signal and the electric a feedback hold signal, lost brother A comparison signal; and a static time control unit, far from the # 4 π + logic unit and the green potential are connected to the waveform generator, the first and gate-shaped signals, and the f-gate logic unit is rotated to receive the sawtooth wave 〇, ^ ^ ^ Output a signal for adjusting the static time., Complex; more ^ dry: 推 push-pull control signal generation circuit as described in item 1? =: A switch is connected to the error amplifier, The power required for the push-pull control signal generation circuit circuit operation = connected to the DC power supply early in the morning and provided with a counter 'to count the startup time; and a digital / analog converter, which uses the analogy Way output like! The push-pull control signal generating circuit described in the first item of the patent scope, wherein the circuit protection unit includes: page 21
    M253032 5. Scope of patent application: a low voltage protection circuit is used for low voltage protection of the circuit according to the feedback signal; a temperature protection circuit is used for circuit overheating protection according to the feedback signal; The voltage protection circuit is used for overvoltage protection of the circuit according to the feedback signal; and an open-circuit protection circuit of the lamp is used for protection of the open load according to the feedback signal. 6. Push-pull control signal generating circuit as described in item 5 of the scope of patent application
    The over-voltage protection circuit controls the opening and closing of the switch. 7. The push-pull control signal generating circuit as described in item 1 of the scope of patent application, wherein the load is a cold cathode fluorescent lamp (CCFL).
    Page 22
TW93203971U 2004-03-16 2004-03-16 Push-pull control signal generation circuit TWM253032U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
TW93203971U TWM253032U (en) 2004-03-16 2004-03-16 Push-pull control signal generation circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI420449B (en) * 2005-10-18 2013-12-21 Samsung Display Co Ltd Flat panel display and method of driving the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI420449B (en) * 2005-10-18 2013-12-21 Samsung Display Co Ltd Flat panel display and method of driving the same

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