Amplitude adjustable IC-LED driving narrow pulse output system

Abstract

The utility model discloses a kind of amplitude adjustable IC-LED drive narrow pulse output system, comprising: signal conditioning circuit, and the signal amplification circuit electrically connected with signal conditioning circuit;Signal conditioning circuit includes current mode digital-analog conversion device connected with reference voltage, current gain amplifier circuit module, high-frequency amplifier circuit module, high-frequency comparator circuit module, and output is given to signal amplification circuit by high-frequency comparator circuit module as output end;Signal amplification circuit includes adjustable impedance device, the output end of signal conditioning circuit is connected with the input side of magnetic isolation controller circuit by adjustable impedance device, the output side of magnetic isolation controller circuit is connected with IC-LED load by power push tube.The utility model discloses a kind of amplitude adjustable IC-LED drive narrow pulse output system with good stability, fast test speed, high compatibility.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor testing technology, and in particular to an amplitude-adjustable IC-LED driving narrow pulse output system. Background Technology

[0002] With the rapid growth of various demands in the LED lighting market, IC-LED driver chips are the core component of LED lighting systems. Current technology utilizes digital IC-LED driver chips to digitally control the optical performance of LED wafer chips, such as brightness and color. Furthermore, these chips provide overcurrent and overvoltage protection for the LED wafer chips, enhancing circuit stability and extending the lifespan of LED devices in the circuit. Therefore, digital IC-LEDs are widely used in ambient lighting and indicator light lighting in various new energy vehicles.

[0003] With the development of digital IC-LED manufacturing technology, the power requirements of IC-LED driver chips and the accuracy requirements of the input drive PWM waveform for IC-LED chips are becoming increasingly stringent. Furthermore, the accuracy of the input drive PWM waveform directly affects parameters such as the brightness, color, and power consumption of the LED wafer chip. Therefore, the accuracy and distortion requirements for the input drive PWM waveform of IC-LED testers are becoming increasingly stringent.

[0004] Against this backdrop, in order to meet the testing requirements of IC-LEDs, there is an urgent need to develop a stable and fully functional amplitude-adjustable IC-LED driver narrow pulse output system to meet the needs of accurate and rapid testing of high-frequency IC-LEDs. Utility Model Content

[0005] This invention overcomes the shortcomings of the prior art and provides an amplitude-adjustable IC-LED driver narrow pulse output system with good stability, fast testing speed, and high compatibility.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an amplitude-adjustable IC-LED driving narrow pulse output system, comprising: a signal conditioning circuit, and a signal amplification circuit electrically connected to the signal conditioning circuit; the signal conditioning circuit includes a current-type digital-to-analog converter connected to a reference voltage, a current gain amplification circuit module, a high-frequency amplifier circuit module, and a high-frequency comparator circuit module, and outputs to the signal amplification circuit through the high-frequency comparator circuit module as the output terminal; the signal amplification circuit includes an adjustable impedance, the output terminal of the signal conditioning circuit is connected to the input side of the magnetic isolation controller circuit through the adjustable impedance, and the output side of the magnetic isolation controller circuit is connected to the IC-LED load through a power drive transistor.

[0007] In a preferred embodiment of this invention, the input terminal of the current-mode digital-to-analog converter is connected to a reference voltage, the output terminal of the current-mode digital-to-analog converter is electrically connected to the input terminal of the current gain amplifier circuit module, the output terminal of the current gain amplifier circuit module is electrically connected to the input terminal of the high-frequency amplifier circuit module, the output terminal of the high-frequency amplifier circuit module is electrically connected to the input terminal of the high-frequency comparator circuit module, and the output terminal of the high-frequency comparator circuit module is connected to one end of an adjustable impedance device.

[0008] In a preferred embodiment of this invention, the current-mode digital-to-analog converter includes a current-mode DAC chip connected to a reference voltage. The current-mode digital-to-analog converter outputs an analog PWM waveform through a current-mode DAC chip; the current gain amplifier circuit module is mainly used to convert the analog PWM waveform output by the current-mode digital-to-analog converter into a voltage PWM waveform; the current gain amplifier circuit module realizes high-frequency analog signal conversion and filters and shapes the output voltage PWM waveform.

[0009] In a preferred embodiment of this utility model, the output terminal of the current-type DAC chip includes output terminal one and output terminal two; The current gain amplifier circuit module includes a current gain amplifier chip 1 and a current gain amplifier chip 2, which are respectively connected to output terminal 1 and output terminal 2. The output of one of the current gain amplifier chips 1 and 2 is used as the output of the filtered and shaped voltage PWM waveform, and the other chip inputs the filtered and shaped voltage PWM waveform to the positive input terminal of the high frequency amplifier circuit module.

[0010] In a preferred embodiment of this utility model, the positive input terminal of the high-frequency amplifier circuit module is connected to the output terminal of the current gain amplifier circuit module, and the negative input terminal of the high-frequency amplifier circuit module is connected to the output terminal of the high-frequency amplifier circuit module through a feedback resistor RF. The positive terminal of the high-frequency amplifier circuit module is connected to the power supply VCC, and the negative terminal of the high-frequency amplifier circuit module is connected to the power supply VEE.

[0011] In a preferred embodiment of this utility model, the negative input terminal of the high-frequency amplifier circuit module is grounded through a gain resistor RG. The positive terminal of the high-frequency amplifier circuit module is connected to the bypass capacitor C. BYP1 Grounded, the negative terminal of the high-frequency amplifier circuit module is connected through a bypass capacitor C. BYP2 Grounded; the output of the high-frequency amplifier circuit module is connected to the load resistor R. S Connect to the positive input terminal of the high-frequency comparator circuit module.

[0012] In a preferred embodiment of this utility model, the positive input terminal of the high-frequency comparator circuit module is connected to the output terminal of the high-frequency amplifier circuit module, and the negative input terminal of the high-frequency amplifier circuit module is connected to the adjustable reference source. The positive terminal of the high-frequency comparator circuit module is connected to the power supply VCC, and the negative terminal of the high-frequency comparator circuit module is connected to the power supply VEE.

[0013] In a preferred embodiment of this utility model, the adjustable impedance device includes a series of voltage divider resistors. One end of the series of voltage divider resistors is electrically connected to the output terminal of the high-frequency comparator circuit module, and the other end of the series of voltage divider resistors is grounded. The series of voltage divider resistors includes several series-connected voltage divider resistors. The series of voltage divider resistors is connected to one end of the input side of the magnetic isolation controller circuit through the voltage divider nodes of the voltage divider resistors, and the other end of the input side of the magnetic isolation controller circuit is grounded.

[0014] In a preferred embodiment of this invention, one end of the output side of the magnetic isolation controller circuit is grounded, and the other end of the output side of the magnetic isolation controller circuit is connected to the input end of the power driver tube as the CTROUT terminal. The output end of the power driver tube is electrically connected to the IC-LED load.

[0015] In a preferred embodiment of this invention, the power driver X8 comprises a push-pull structure consisting of two complementary transistors; the two complementary transistors include an NPN transistor and a PNP transistor.

[0016] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This invention discloses an amplitude-adjustable IC-LED driver narrow pulse output system with good stability, fast testing speed, and high compatibility. This invention can be used to test digital IC-LEDs of different specifications, and it operates stably with a fast testing speed, showing promising market prospects. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic block diagram of an amplitude-adjustable IC-LED driver narrow pulse output system according to a preferred embodiment of the present invention. Figure 2 This is a circuit diagram of a current-type DAC module and a current gain amplifier circuit module of an amplitude-adjustable IC-LED driver narrow pulse output system according to a preferred embodiment of the present invention. Figure 3 A detailed circuit diagram of a high-frequency amplifier circuit module of an amplitude-adjustable IC-LED driver narrow pulse output system according to a preferred embodiment of this utility model. Figure 4A PWM waveform conversion diagram of an amplitude-adjustable IC-LED driver narrow pulse output system according to a preferred embodiment of this utility model; Figure 5 A simulation waveform diagram of the output of an amplitude-adjustable IC-LED driver narrow pulse output system according to a preferred embodiment of this utility model; Among them, X1 is a current-mode digital-to-analog converter; X2 is a current gain amplifier circuit module; X3 is a high-frequency amplifier circuit module; X4 is a high-frequency comparator circuit module; X5 is an adjustable reference source; X6 is an adjustable impedance device; X7 is a magnetic isolation controller circuit; and X8 is a power driver transistor. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features therein are detailed descriptions of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features therein can be combined with each other.

[0020] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0021] Example 1, as Figure 1 As shown, an amplitude-adjustable IC-LED driver narrow pulse output system includes: a signal conditioning circuit and a signal amplification circuit electrically connected to the signal conditioning circuit.

[0022] Specifically, the signal conditioning circuit includes a current-mode digital-to-analog converter (D / A converter) X1 connected to a reference voltage, a current gain amplifier module X2, a high-frequency amplifier module X3, and a high-frequency comparator module X4. The signal is output to the signal amplification circuit via the high-frequency comparator module X4. The input of the current-mode D / A converter X1 is connected to the reference voltage, and its output is electrically connected to the input of the current gain amplifier module X2. The current-mode D / A converter X1 includes a current-mode DAC chip connected to the reference voltage. The current-mode D / A converter X1 outputs an analog PWM waveform through the current-mode DAC chip. The current gain amplifier module X2 is mainly used to convert the analog PWM waveform output by the current-mode D / A converter X1 into a voltage PWM waveform. The current gain amplifier module X2 performs high-frequency analog-to-frequency conversion and filters and shapes the output voltage PWM waveform.

[0023] Furthermore, the output terminal of the current gain amplifier circuit module X2 is electrically connected to the input terminal of the high-frequency amplifier circuit module X3, and the positive input terminal of the high-frequency amplifier circuit module X3 is connected to the output terminal of the current gain amplifier circuit module X2. Specifically, the negative input terminal of the high-frequency amplifier circuit module X3 is connected to the output terminal of the high-frequency amplifier circuit module X3 through a feedback resistor RF; the positive terminal of the high-frequency amplifier circuit module X3 is connected to the power supply VCC, and the negative terminal of the high-frequency amplifier circuit module X3 is connected to the power supply VEE; the negative input terminal of the high-frequency amplifier circuit module X3 is grounded through a gain resistor RG.

[0024] Furthermore, the output terminal of the high-frequency amplifier circuit module X3 is electrically connected to the input terminal of the high-frequency comparator circuit module X4. Specifically, the positive input terminal of the high-frequency comparator circuit module X4 is connected to the output terminal of the high-frequency amplifier circuit module X3, and the negative input terminal of the high-frequency amplifier circuit module X3 is connected to the adjustable reference source X5; the positive terminal of the high-frequency comparator circuit module X4 is connected to the power supply VCC, and the negative terminal of the high-frequency comparator circuit module X4 is connected to the power supply VEE.

[0025] Specifically, the signal amplification circuit includes an adjustable impedance X6; the output of the high-frequency comparator circuit module X4 is connected to one end of the adjustable impedance X6, and the output of the signal conditioning circuit is connected to the input side of the magnetic isolation controller circuit X7 through the adjustable impedance X6. The output side of the magnetic isolation controller circuit X7 is connected to the IC-LED load through the power driver transistor X8. Further, the adjustable impedance X6 includes a series of voltage divider resistors, one end of which is electrically connected to the output of the high-frequency comparator circuit module X4, and the other end is grounded. The voltage divider resistor series includes several series-connected voltage divider resistors, which are connected to one end of the input side of the magnetic isolation controller circuit X7 through their voltage divider nodes. The other end of the input side of the magnetic isolation controller circuit X7 is grounded. One end of the output side of the magnetic isolation controller circuit X7 is grounded, and the other end serves as the CTROUT terminal, connected to the input of the power driver transistor X8. The output of the power driver transistor X8 is electrically connected to the IC-LED load.

[0026] In Example 2, based on Example 1, the output terminal of the current-type DAC chip includes output terminal 1 and output terminal 2; the current gain amplifier circuit module X2 includes current gain amplifier chip 1 and current gain amplifier chip 2 connected to output terminal 1 and output terminal 2 respectively; the output of one of the current gain amplifier chip 1 and current gain amplifier chip 2 is used as the filtered and shaped voltage PWM waveform output, and the other chip inputs the filtered and shaped voltage PWM waveform to the positive input terminal of the high-frequency amplifier circuit module X3.

[0027] Furthermore, the positive terminal of the high-frequency amplifier circuit module X3 is connected to the bypass capacitor C.BYP1 Grounded, the negative terminal of the high-frequency amplifier circuit module X3 is connected to the bypass capacitor C. BYP2 Grounded; the output of the high-frequency amplifier circuit module X3 is connected to the load resistor R. S Connect to the positive input terminal of the high-frequency comparator circuit module X4.

[0028] Furthermore, the power driver X8 comprises a push-pull structure consisting of two complementary transistors; the two complementary transistors include an NPN transistor and a PNP transistor.

[0029] Example 3, as Figures 1-4 As shown, the amplitude-adjustable IC-LED driver narrow pulse output system includes: a signal conditioning circuit and a signal amplification circuit electrically connected to the signal conditioning circuit. The signal conditioning circuit serves as a high-frequency, low-voltage signal conditioning circuit, and the signal amplification circuit serves as a signal amplification power circuit. The signal conditioning circuit includes a current-type digital-to-analog converter X1, a current gain amplifier circuit module X2, a high-frequency amplifier circuit module X3, a high-frequency comparator circuit module X4, and an adjustable reference source X5. The signal amplification circuit includes an adjustable impedance resistor X6, a magnetic isolation controller circuit X7, and a power driver transistor circuit X8, etc.

[0030] Specifically, the current-type digital-to-analog converter X1 mainly includes a current-type DAC chip. The current-type digital-to-analog converter X1 is mainly used to output the analog PWM waveform. The input of the current gain amplifier circuit module X2 is connected to the output of the current-type digital-to-analog converter X1. The current-type digital-to-analog converter X1 is mainly used to convert the current-type DAC current PWM waveform into a voltage PWM waveform, realizing the analog quantity conversion function of high-frequency IV. At the same time, the current gain amplifier circuit module X2 can filter and shape the output voltage PWM waveform.

[0031] Specifically, the negative input of the high-frequency comparator circuit module X4 is connected to the adjustable reference source X5. Similarly, the range of the reference comparison voltage value is set by the adjustable reference source X5. The positive input of the high-frequency comparator circuit module X4 is connected to the output of the high-frequency amplifier circuit module X3. Similarly, the voltage PWM waveform of the high-frequency amplifier circuit module X3 serves as the "compared object" of the high-frequency comparator module X4. The adjustable reference source X5 uses reference voltage sources of different specifications, which can maintain a constant output voltage even when parameters such as ambient temperature or power supply voltage change. The specific reference voltage value needs to be adjusted according to the actual output to achieve the preset value. The high-frequency comparator circuit module X4 uses the LT1715 high-frequency comparator chip, which is a dual-channel comparator with low-voltage operation capability. A separate power supply provides an independent analog input range and output logic level without performance loss. The output high-frequency PWM digital voltage waveform reflects the instantaneous comparison result between the input signal and the reference voltage, and its frequency characteristics are determined by the dynamic change rate of the input signal. After shaping, the output waveform can be directly used to drive subsequent digital control circuits or trigger protection mechanisms, ensuring the real-time performance and accuracy of the system response.

[0032] Specifically, the output of the high-frequency comparator circuit module X4 is connected to the adjustable impedance resistor X6. The high-frequency PWM digital voltage waveform output from the high-frequency comparator circuit module X4 is divided by resistors X6-R1 and X6-R2 to output a PWM digital voltage waveform with controllable amplitude. The high-frequency PWM digital voltage waveform is applied to a pair of resistors, with the connection point between them serving as the output terminal. The resistor voltage division method reduces the voltage intensity, while the output amplitude is controllable by adjusting the ratio of the two resistors (resistors X6-R1 and X6-R2). The specific voltage division ratio depends on the ratio of the resistance value of resistor X6-R2 to the total resistance value of resistors X6-R1 and X6-R2; there is no fixed limit, and it depends on the actual application. In addition, to ensure accurate voltage division ratio, the selected voltage dividing resistors are preferably high-precision components available in current technology.

[0033] Specifically, the adjustable impedance X6 is connected to the primary coil of the magnetic isolation controller circuit X7. The adjustable amplitude PWM digital voltage waveform output by the adjustable impedance X6 is amplified by the magnetic isolation controller circuit X7 and converted into a medium-voltage voltage with controllable amplitude to control the power driver X8. The magnetic isolation controller circuit X7 uses the existing MI4-20mA series isolation amplifier, employing a two-wire electromagnetic isolation method. It requires no operating power supply, effectively solving the dependence of transmitted signals on the operating power supply. Furthermore, it can achieve an isolation voltage of 3KVDC at both the input and output terminals, thus meeting the requirement for long-distance, distortion-free signal transmission.

[0034] Specifically, such as Figure 2The diagram shows the specific circuit diagrams of the current-mode digital-to-analog converter X1 and the current gain amplifier circuit module X2. The following provides a detailed description of each component in the diagram. The core DAC chip of the current-mode digital-to-analog converter X1 is the 16-bit serial input current-output digital-to-analog converter AD5545. The serial input transmits data with the microcontroller (not described in this invention) via signals / LDAC, / RS, MSB, / CS, CLK, and SDI. Figure 2 The ADR01 chip in the DAC chip is connected to VREF as a reference voltage source to provide a reference voltage for the DAC chip. The two current outputs IOUTA and IOUTB of the DAC chip are connected to the current gain amplifier module X2. The current gain amplifier module X2 uses the high-performance operational amplifier AD8065, and the integrated feedback resistor is combined with the IV precision amplifier. In the form of voltage feedback, the current gain amplifier module X2 provides full-scale voltage outputs VOUTA1 and VOUTB1 that track temperature changes.

[0035] Specifically, such as Figure 3 The diagram shown is a detailed circuit diagram of the high-frequency amplifier circuit module X3. The following is a detailed description of each component in the diagram. The high-frequency amplifier circuit module X3 includes a high-frequency operational amplifier OPA817 and a bypass capacitor CB. YP1 and bypass capacitor CB YP2 Gain resistor RG, feedback resistor RF, load resistor RS. The positive input terminal of the high-frequency operational amplifier OPA817 is connected to the output terminal of the current gain amplifier module X2, which serves as the input analog signal; bypass capacitor CB YP1 and bypass capacitor CB YP2 One end is connected to the power supply VCC or VEE, and the other end is grounded; one end of the gain resistor RG is connected to the negative input terminal of the high-frequency operational amplifier OPA817, and the other end is grounded; one end of the feedback resistor RF is connected to the negative input terminal of the high-frequency operational amplifier OPA817, and the other end is connected to the output terminal of the high-frequency operational amplifier OPA817; one end of the load resistor RS is connected to the output terminal of the high-frequency operational amplifier OPA817, and the other end is used as the output analog signal.

[0036] Example 4, based on any one of Examples 1 to 3, such as Figure 4 As shown, based on Figure 1The interconnectedness of each module and the output waveform conversion diagram of each stage of this utility model system are as follows: The current-type digital-to-analog converter X1 outputs a low-voltage current-type PWM square wave waveform to the current gain amplifier circuit module X2, which then shapes and outputs a low-voltage voltage-type PWM square wave waveform. This waveform is then transmitted to the high-frequency comparator circuit module X4, which outputs a high-frequency voltage-type PWM square wave waveform to the adjustable impedance device X6. The adjustable impedance device X6 outputs an adjustable narrow pulse voltage-type PWM square wave waveform to the input side of the magnetic isolation controller circuit X7. The magnetic isolation controller circuit X7 then outputs an isolation amplified voltage analog PWM square wave waveform to the power driver transistor X8, which outputs a power-type narrow pulse PWM square wave waveform.

[0037] like Figure 5 The diagram shown is a simulation demonstration of the output waveforms of each circuit module. The following is a detailed explanation of each waveform simulated in the diagram.

[0038] like Figure 5 As shown: Waveform 1 (waveform name: X2-OUT_reference waveform lower left corner) is the low-voltage voltage-type PWM square wave waveform shaped and output by the current gain amplifier circuit module X2. Waveform 1 mainly simulates the delay situation of the current-type DAC output waveform with a slow rise in the actual circuit. Through this waveform, it can be observed that the output voltage waveform of the current-type digital-to-analog converter X1 is not a high-speed pulse with a rise time of up to the nanosecond level due to the influence of factors such as DAC conversion rate and stray capacitance between chip pins.

[0039] like Figure 5 As shown: Waveform 2 (waveform name: X4-OUT_reference waveform bottom left corner) is the high-frequency voltage-type PWM square wave output by the high-frequency comparator circuit module X4. Waveform 2 mainly simulates the process of converting the time-delayed PWM square wave in Waveform 1 into a high-frequency narrow pulse through the fast comparison function of the high-frequency comparator circuit module X4. The rising edge of the waveform shows that the fastest time for the narrow pulse can be as high as approximately 2ns.

[0040] like Figure 5 As shown: Waveform 3 (waveform name: X8-OUT_reference waveform bottom left corner) is the power-type narrow-pulse PWM square wave output by power driver X8. Waveform 3 mainly simulates the output PWM voltage waveform of high-frequency comparator circuit module X4, which, after passing through adjustable impedance X6, magnetic isolation controller circuit X7, and power driver X8 circuit, outputs a medium-amplitude high-frequency narrow-pulse PWM square wave. The rising edge of the waveform shows that the fastest time for a medium-amplitude high-frequency narrow pulse can be as high as approximately 2ns, meeting the design requirements.

[0041] Working principle: This invention discloses an amplitude-adjustable IC-LED driver narrow pulse output system with good stability, fast testing speed, and high compatibility. This invention is compatible with testing digital IC-LEDs of different specifications, operates stably, has a fast testing speed, and shows promising market prospects.

[0042] Based on the preferred embodiments of this utility model, and through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An amplitude-adjustable IC-LED driver narrow pulse output system, comprising: A signal conditioning circuit, and a signal amplification circuit electrically connected to the signal conditioning circuit, characterized in that: The signal conditioning circuit includes a current-type digital-to-analog converter (X1) connected to the reference voltage, a current gain amplifier circuit module (X2), a high-frequency amplifier circuit module (X3), and a high-frequency comparator circuit module (X4), and outputs to the signal amplification circuit through the high-frequency comparator circuit module (X4) as the output terminal. The signal amplification circuit includes an adjustable impedance (X6). The output of the signal conditioning circuit is connected to the input side of the magnetic isolation controller circuit (X7) through the adjustable impedance (X6). The output side of the magnetic isolation controller circuit (X7) is connected to the IC-LED load through a power drive transistor (X8).

2. The amplitude-adjustable IC-LED driving narrow pulse output system according to claim 1, characterized in that: The input terminal of the current-mode digital-to-analog converter (X1) is connected to the reference voltage. The output terminal of the current-mode digital-to-analog converter (X1) is electrically connected to the input terminal of the current gain amplifier circuit module (X2). The output terminal of the current gain amplifier circuit module (X2) is electrically connected to the input terminal of the high-frequency amplifier circuit module (X3). The output terminal of the high-frequency amplifier circuit module (X3) is electrically connected to the input terminal of the high-frequency comparator circuit module (X4). The output terminal of the high-frequency comparator circuit module (X4) is connected to one end of the adjustable impedance device (X6).

3. The amplitude-adjustable IC-LED driving narrow pulse output system according to claim 2, characterized in that: The current-mode digital-to-analog converter (X1) includes a current-mode DAC chip connected to a reference voltage; The current-type digital-to-analog converter (X1) outputs an analog PWM waveform through a current-type DAC chip; the current gain amplifier circuit module (X2) is mainly used to convert the analog PWM waveform output by the current-type digital-to-analog converter (X1) into a voltage PWM waveform; the current gain amplifier circuit module (X2) realizes high-frequency analog quantity conversion and filters and shapes the output voltage PWM waveform.

4. The amplitude-adjustable IC-LED driving narrow pulse output system according to claim 3, characterized in that: The output terminals of a current-mode DAC chip include output terminal one and output terminal two; The current gain amplifier circuit module (X2) includes a current gain amplifier chip 1 and a current gain amplifier chip 2 connected to output terminal 1 and output terminal 2 respectively; the output of one of the current gain amplifier chips 1 and 2 is used as the filtered and shaped voltage PWM waveform output, and the other chip inputs the filtered and shaped voltage PWM waveform to the positive input terminal of the high frequency amplifier circuit module (X3).

5. The amplitude-adjustable IC-LED driving narrow pulse output system according to claim 4, characterized in that: The positive input terminal of the high-frequency amplifier circuit module (X3) is connected to the output terminal of the current gain amplifier circuit module (X2), and the negative input terminal of the high-frequency amplifier circuit module (X3) is connected to the output terminal of the high-frequency amplifier circuit module (X3) through the feedback resistor RF. The positive terminal of the high-frequency amplifier circuit module (X3) is connected to the power supply VCC, and the negative terminal of the high-frequency amplifier circuit module (X3) is connected to the power supply VEE.

6. The amplitude-adjustable IC-LED driving narrow pulse output system according to claim 5, characterized in that: The negative input terminal of the high-frequency amplifier circuit module (X3) is grounded through the gain resistor RG; The positive terminal of the high-frequency amplifier circuit module (X3) is connected to the bypass capacitor C. BYP1 Grounded, the negative terminal of the high-frequency amplifier circuit module (X3) is connected through the bypass capacitor C. BYP2 Grounded; the output of the high-frequency amplifier circuit module (X3) is connected to the load resistor R. S Connect to the positive input terminal of the high-frequency comparator circuit module (X4).

7. The amplitude-adjustable IC-LED driving narrow pulse output system according to claim 5 or 6, characterized in that: The positive input terminal of the high-frequency comparator circuit module (X4) is connected to the output terminal of the high-frequency amplifier circuit module (X3), and the negative input terminal of the high-frequency amplifier circuit module (X3) is connected to the adjustable reference source (X5). The positive terminal of the high-frequency comparator circuit module (X4) is connected to the power supply VCC, and the negative terminal of the high-frequency comparator circuit module (X4) is connected to the power supply VEE.

8. The amplitude-adjustable IC-LED driving narrow pulse output system according to claim 7, characterized in that: The adjustable impedance device (X6) includes a series of voltage divider resistors. One end of the series of voltage divider resistors is electrically connected to the output terminal of the high-frequency comparator circuit module (X4), and the other end of the series of voltage divider resistors is grounded. The series of voltage divider resistors includes several series-connected voltage divider resistors. The series of voltage divider resistors is connected to one end of the input side of the magnetic isolation controller circuit (X7) through the voltage divider nodes of the voltage divider resistors. The other end of the input side of the magnetic isolation controller circuit (X7) is grounded.

9. The amplitude-adjustable IC-LED driving narrow pulse output system according to claim 8, characterized in that: One end of the output side of the magnetic isolation controller circuit (X7) is grounded, and the other end of the output side of the magnetic isolation controller circuit (X7) is connected to the input of the power drive tube (X8) as the CTROUT terminal. The output of the power drive tube (X8) is electrically connected to the IC-LED load.

10. The amplitude-adjustable IC-LED driving narrow pulse output system according to claim 9, characterized in that: The power driver (X8) consists of a push-pull configuration composed of two complementary transistors; the two complementary transistors include an NPN transistor and a PNP transistor.

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