CN218824670U - Driving circuit of laser radar transmitter - Google Patents
Driving circuit of laser radar transmitter Download PDFInfo
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- CN218824670U CN218824670U CN202222377939.2U CN202222377939U CN218824670U CN 218824670 U CN218824670 U CN 218824670U CN 202222377939 U CN202222377939 U CN 202222377939U CN 218824670 U CN218824670 U CN 218824670U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The utility model relates to a laser radar transmitter's drive circuit, constant voltage source module adopts power chip U2, boot electric capacity C1, freewheeling diode D1, inductance L1 step-down, decouple through the electric capacity again, output VLED supplies power, and adopt resistance to output VLED sampling feedback to power chip U2, adopt electric capacity C7 and resistance R3 as comparison circuit, make power chip U2 output constant voltage power VLED2, the module of decoupling is the parallel capacitance group that electric capacity C8-electric capacity C11 are constituteed, laser radar transmitter positive pole is connected between constant voltage power VLED and parallel capacitance group, mos drive module receives modulation signal ILL P, improve the driving force through driver U1A, connect field effect transistor T1's G end, RC absorption circuit restraines power VLED burr that passes through laser radar transmitter D2's electric current production, modulation signal ILL _ P is at the high/low level, field effect transistor T1 opens/closes, laser radar transmitter D2 is luminous/does not give out light, use this constant voltage as laser radar transmitter power supply, and take driver U1A, field effect transistor T1 and absorption circuit and absorption radar transmitter's absorption circuit supply power, improve drive circuit RC, field effect radar transmitter stability.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a driving circuit of a laser radar transmitter.
Background
Pulse laser rangefinder, by laser radar transmitter to the light pulse of surveyed target transmission, then receiving system receives the light pulse that the target reflection is back, the distance of target is worked out through the time of measuring the light pulse round trip, laser radar transmitter is when becoming the light pulse with the electric pulse, be subject to the physical characteristics and the application condition of laser radar transmitter itself, drive pulse frequency has very big influence to laser radar transmitter, the unstable condition of drive can cause laser radar transmitter to generate heat seriously or luminous inhomogeneous, light signal is unstable leads to the range finding effect not good, the range finding precision is inaccurate.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the invention aims to provide a driving circuit of a laser radar transmitter, which adopts a constant voltage to supply power to the laser radar transmitter and adopts a driver and a field effect tube to drive the laser radar transmitter, so that the problem of unstable driving in the prior art can be effectively solved.
The technical scheme includes that the laser radar transmitter comprises a constant voltage source module, a decoupling module, a MOS driving module and a laser radar transmitter, wherein the constant voltage source module is respectively connected with the decoupling module and the laser radar transmitter, the MOS driving module inputs a modulation signal, and the MOS driving module drives the laser radar transmitter through an MOS (metal oxide semiconductor) tube.
Preferably, the constant voltage source module includes a power PW _ VCC, the power PW _ VCC is connected to a VIN pin and an EN pin of a power chip U2, one end of a capacitor C3, and one end of a resistor R2, a SS pin of the power chip U2 is connected to one end of a capacitor C6, a GND pin of the power chip U2, the other end of the capacitor C3, the other end of the resistor R2, and the other end of the capacitor C6 are connected to ground, a BOOT pin of the power chip U2 is connected to one end of the capacitor C1, a SW pin of the power chip U2 is connected to the other end of the capacitor C1, a cathode of a diode D1, one end of an inductor L1, the other end of the inductor L1 and one end of the resistor R1, one end of the capacitor C4, one end of the capacitor C5 is a power VLED, an anode of the diode D1, the other end of the capacitor C4, the other end of the capacitor C5 is connected to ground, an FB pin of the power chip U2 is connected to the other end of the resistor R1, one end of the resistor R4, and the other end of the capacitor C7 is connected to ground.
Preferably, the mos driving module includes a modulation signal ILL P, the modulation signal ILL P is connected to a pin 3 of the driver U1A, a pin 4 and a pin 2 of the driver U1A are connected to ground, a pin 1 of the driver U1A is connected to a power VCC 5V, the power VCC 5V is connected to one end of a capacitor C12 and one end of a capacitor C13, the other end of the capacitor C12 and the other end of the capacitor C13 are connected to ground, the pin 5 of the driver U1A is connected to a G end of the field-effect transistor T1, a D end of the field-effect transistor T1 is connected to a cathode of the laser radar transmitter D2 and one end of the capacitor C14, the other end of the capacitor C14 is connected to one end of the resistor R5, and the other end of the resistor R5 and the S end of the field-effect transistor T1 are connected to ground.
The utility model has the advantages that: 1, a power supply chip U2 with the model number of PT8251GQW is adopted, a capacitor C1 is used as a boot capacitor, a diode D1 is used as a freewheeling diode, the power supply chip U2, the diode D1 and an inductor L1 are subjected to voltage reduction, decoupling is carried out through decoupling capacitors C4 and C5, an output power supply VLED supplies power to a laser radar transmitter D2, a resistor R1 and a resistor R4 are used as voltage division matching resistors, the output power supply VLED is sampled and fed back to an FB pin of the power supply chip U2, and a capacitor C7 and a resistor R3 are used as a comparison circuit, so that the power supply chip U2 outputs a constant voltage power supply VLED2;
2, the positive pole of the laser radar transmitter is connected between a constant voltage power supply VLED and a parallel capacitor bank, the parallel capacitor bank is used as a matching capacitor of the laser radar transmitter D2, the rising edge time of the laser radar transmitter D2 can be adjusted, a modulation signal ILL P is added to a pin 3 of a driver U1A of UCC27517DBVR, the driver U1A is a single-channel, high-speed, low-side gate driver for improving the driving capability, a pin 5 of the driver U1A is connected to a G end of a field effect transistor T1 as a signal output pin, resistors R5 and C14 are used as an RC absorption circuit to suppress burrs generated by the power supply VLED through the current of the laser radar transmitter D2, when the modulation signal ILL _ P is at a high level, the field effect transistor T1 is turned on, the laser radar transmitter D2 emits light, the current passes from the VLED through the laser radar transmitter D2 to GND, when the modulation signal ILL _ P is at a low level, the field effect transistor T1 is turned off, the laser radar transmitter D2 does not emit light, thereby adopting a constant voltage to supply power for the laser radar transmitter, and the driver U1A field effect transistor T1 and an absorption circuit are adopted to absorb the laser radar transmitter to improve the stability of the driving circuit to drive the laser radar transmitter.
Drawings
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be more clearly understood from the following detailed description of the embodiments with reference to fig. 1 to 2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
In the first embodiment, a driving circuit of a laser radar transmitter includes a constant voltage source module 1, a decoupling module 2, a mos driving module 3, and a laser radar transmitter, where the constant voltage source module is connected to the decoupling module and the laser radar transmitter, respectively, the mos driving module inputs a modulation signal, the constant voltage source module uses a power chip U2 with model number PT8251GQW, an input power source thereof is a power PW _ VCC, a voltage range is 12V-24V, a current is above 3A, capacitors C2 and C3 are decoupling capacitors, a resistor R2 is a pull-down resistor, a capacitor C6 is a decoupling capacitor, a capacitor C1 is a boot capacitor, a diode D1 is a freewheeling diode, the power chip U2, the diode D1, and an inductor L1 are stepped down, and are decoupled by capacitors C4 and C5 decoupling capacitors, an output power VLED supplies power to the laser radar transmitter D2 (where the power source VLED is set to 5V), and the resistor R1 and the resistor R4 are used as voltage dividing matching resistors, an output power supply VLED is sampled and fed back to an FB pin of a power supply chip U2, a capacitor C7 and a resistor R3 are used as a comparison circuit, the power supply chip U2 outputs a constant voltage power supply VLED, a decoupling module 2 is a parallel capacitor group consisting of a capacitor C8, a capacitor C9, a capacitor C10 and a capacitor C11, the anode of a laser radar transmitter is connected between the constant voltage power supply VLED and the parallel capacitor group and used as a matching capacitor of the laser radar transmitter D2, the rising edge time of the laser radar transmitter D2 can be adjusted, a mos driving module receives a modulation signal ILL P and adds the modulation signal ILL P to a pin 3 of a driver U1A with the model of UCC27517DBVR, the driver U1A is a single-channel, high-speed and low-side grid driver and is used for improving the driving capability, a pin 5 of the driver U1A is used as a signal output pin and is connected with a G end of a field effect transistor T1 and used as the signal input of the field effect transistor T1, the S termination GND of field effect transistor T1, resistance R5 and C14 are as RC absorption circuit, restrain the burr that power VLED passed through laser radar transmitter D2' S electric current production, when modulation signal ILL _ P high level, field effect transistor T1 opens, laser radar transmitter D2 is luminous, the electric current passes through laser radar transmitter D2 to GND from VLED, during modulation signal ILL _ P low level, field effect transistor T1 closes, laser radar transmitter D2 is luminous, thereby take the constant voltage to supply power for laser radar transmitter, and take driver U1A, field effect transistor T1 and RC absorption circuit drive laser radar transmitter, can improve driving stability.
In the second embodiment, based on the first embodiment, the constant voltage source module uses a power chip U2 of PT8251GQW, an input power thereof is a power PW _ VCC, a voltage range is 12V-24V, a current is above 3A, capacitors C2 and C3 are decoupling capacitors, a resistor R2 is a pull-down resistor, a capacitor C6 is a decoupling capacitor, a capacitor C1 is a BOOT capacitor, a diode D1 is a freewheeling diode, the power chip U2, a diode D1 and an inductor L1 are stepped down, and are decoupled by the capacitors C4 and C5 decoupling capacitors, an output power VLED supplies power to the lidar transmitter D2, and uses the resistors R1 and R4 as voltage division matching resistors, samples and feeds back the output power VLED to a FB pin of the power chip U2, and uses the capacitors C7 and R3 as a comparison circuit, so that the power chip U2 outputs the power VLED including the power PW _ VCC, a power supply PW _ VCC is connected with a VIN pin and an EN pin of a power supply chip U2, one end of a capacitor C3 and one end of a resistor R2, an SS pin of the power supply chip U2 is connected with one end of a capacitor C6, a GND pin of the power supply chip U2, the other end of the capacitor C3, the other end of the resistor R2 and the other end of the capacitor C6 are connected with the ground, a BOOT pin of the power supply chip U2 is connected with one end of the capacitor C1, a SW pin of the power supply chip U2 is respectively connected with the other end of the capacitor C1, the cathode of a diode D1 and one end of an inductor L1, the other end of the inductor L1 and one end of the resistor R1, one end of the capacitor C4 and one end of a capacitor C5 are respectively connected with the power supply VLED, the anode of the diode D1, the other end of the capacitor C4 and the other end of the capacitor C5 are connected with the ground, a FB pin of the power supply chip U2 is connected with the other end of the resistor R1, the resistor R4 and the other end of the COMP, the power supply chip U2 is connected with the COMP, the other end of the capacitor C7 is connected with one end of the resistor R3, and the other end of the resistor R3 is connected with the ground.
Third embodiment, on the basis of first embodiment, the decoupling module is a parallel capacitor group composed of a capacitor C8, a capacitor C9, a capacitor C10, and a capacitor C11, the positive electrode of the lidar transmitter is connected between the constant voltage power source VLED and the parallel capacitor group, and the decoupling module is used as a matching capacitor of the lidar transmitter D2, so that the rising edge time of the lidar transmitter D2 can be adjusted, the rising edge time can be increased due to a large capacitance value, the rising time can be decreased due to a small capacitance value, one end of the capacitor C8, one end of the capacitor C9, one end of the capacitor C10, one end of the capacitor C11 is connected to the power source VLED, and the other end of the capacitor C8, the other end of the capacitor C9, the other end of the capacitor C10, and the other end of the capacitor C11 are connected to the ground.
In a fourth embodiment, based on the first embodiment, the mos driving module receives a modulation signal
ILL P is added to a pin 3 of a driver U1A with the model of UCC27517DBVR, the driver U1A is a single-channel, high-speed and low-side grid driver and can effectively drive a Metal Oxide Semiconductor Field Effect Transistor (MOSFET) and an Insulated Gate Bipolar Transistor (IGBT) power switch for improving the driving energy, a pin 5 of the driver U1A is used as a signal output pin and connected with a G end of a field effect transistor T1 to be used as a signal input of the field effect transistor T1, an S end of the field effect transistor T1 is connected with GND, resistors R5 and C14 are used as RC absorption circuits to inhibit burrs generated by a power supply VLED through the current of a laser radar transmitter D2, when the level of a modulation signal ILL _ P is high, the field effect transistor T1 is turned on, the laser radar transmitter D2 emits light, the current passes from the VLED through the laser radar transmitter D2 to the GND, when modulation signal ILL _ P is at a low level, field effect transistor T1 is closed, laser radar emitter D2 does not emit light and comprises modulation signal ILL P, modulation signal ILL P is connected with pin 3 of driver U1A, pin 4 and pin 2 of driver U1A are connected to the ground, pin 1 of driver U1A is connected with power VCC 5V, power VCC 5V is connected with one end of capacitor C12 and one end of capacitor C13, the other end of capacitor C12 and the other end of capacitor C13 are connected to the ground, pin 5 of driver U1A is connected with the G end of field effect transistor T1, the D end of field effect transistor T1 is connected with the cathode of laser radar emitter D2 and one end of capacitor C14, the other end of capacitor C14 is connected with one end of resistor R5, and the other end of resistor R5 is connected to the S end of field effect transistor T1.
Claims (6)
1. The utility model provides a laser radar transmitter's drive circuit, includes constant voltage source module (1), decoupling module (2), MOS drive module (3), laser radar transmitter, its characterized in that, decoupling module (2), laser radar transmitter are connected respectively in constant voltage source module (1), and MOS drive module (3) input modulation signal, and MOS drive module (3) are through MOS pipe drive laser radar transmitter.
2. The driving circuit of a lidar transmitter according to claim 1, wherein the constant voltage source module (1) comprises a power PW _ VCC, the power PW _ VCC is connected to a VIN pin and an EN pin of a power chip U2, one end of a capacitor C3, and one end of a resistor R2, a SS pin of the power chip U2 is connected to one end of a capacitor C6, a GND pin of the power chip U2, the other end of the capacitor C3, the other end of a resistor R2, and the other end of the capacitor C6 are connected to ground, a BOOT pin of the power chip U2 is connected to one end of the capacitor C1, a SW pin of the power chip U2 is connected to the other end of the capacitor C1, a cathode of the diode D1, one end of the inductor L1, one end of the resistor R1, one end of the capacitor C4, one end of the capacitor C5 is a power VLED, an anode of the diode D1, the other end of the capacitor C4, and the other end of the capacitor C5 are connected to ground, a FB pin of the power chip U2 is connected to ground, one end of the resistor R4, one end of the resistor R3, and one end of the capacitor C7 is connected to ground, and one end of the capacitor C3 is connected to ground.
3. The lidar transmitter driving circuit according to claim 1, wherein the decoupling module (2) comprises a capacitor C8, a capacitor C9, a capacitor C10, and a capacitor C11, wherein one end of the capacitor C8, one end of the capacitor C9, one end of the capacitor C10, and one end of the capacitor C11 are connected to the power source VLED, and the other end of the capacitor C8, the other end of the capacitor C9, the other end of the capacitor C10, and the other end of the capacitor C11 are connected to ground.
4. The driving circuit of a lidar transmitter of claim 1, wherein the mos driving module (3) comprises a modulation signal ILL P, the modulation signal ILL P is connected to pin 3 of the driver U1A, pin 4 and pin 2 of the driver U1A are connected to ground, pin 1 of the driver U1A is connected to a power supply VCC 5V, the power supply VCC 5V is connected to one end of a capacitor C12 and one end of a capacitor C13, the other end of the capacitor C12 and the other end of the capacitor C13 are connected to ground, pin 5 of the driver U1A is connected to terminal G of a fet T1, terminal D of the fet T1 is connected to the negative electrode of the lidar transmitter D2 and one end of a capacitor C14, the other end of the capacitor C14 is connected to one end of a resistor R5, and the other end of the resistor R5 is connected to terminal S of the fet T1.
5. The driving circuit of claim 2, wherein the power chip U2 is PT8251GQW.
6. The lidar transmitter driver circuit of claim 4, wherein the driver U1A is a UCC27517DBVR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222377939.2U CN218824670U (en) | 2022-09-07 | 2022-09-07 | Driving circuit of laser radar transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222377939.2U CN218824670U (en) | 2022-09-07 | 2022-09-07 | Driving circuit of laser radar transmitter |
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| Publication Number | Publication Date |
|---|---|
| CN218824670U true CN218824670U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222377939.2U Active CN218824670U (en) | 2022-09-07 | 2022-09-07 | Driving circuit of laser radar transmitter |
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| CN (1) | CN218824670U (en) |
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- 2022-09-07 CN CN202222377939.2U patent/CN218824670U/en active Active
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