CN210006325U - power supply experiment platform device - Google Patents
power supply experiment platform device Download PDFInfo
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- CN210006325U CN210006325U CN201920737943.0U CN201920737943U CN210006325U CN 210006325 U CN210006325 U CN 210006325U CN 201920737943 U CN201920737943 U CN 201920737943U CN 210006325 U CN210006325 U CN 210006325U
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Abstract
The utility model discloses an kind of power experiment platform device, a serial communication port, including numerical control power module, LDO linear voltage regulator module, BUCK voltage reduction module, BOOST voltage BOOST module, the power of numerical control power module output respectively with LDO linear voltage regulator module, BUCK voltage reduction module, BOOST voltage BOOST module's signal input part is connected, BUCK voltage reduction module, BOOST voltage BOOST module's signal output part is connected with LDO linear voltage regulator module's signal input part respectively, BUCK voltage reduction module's signal output part still is connected with BOOST voltage BOOST module's signal input part, BUCK voltage reduction module, BOOST voltage BOOST module signal output part's voltage is measured and is shown in the oscilloscope with the universal meter.
Description
Technical Field
The utility model relates to an experimental facilities technical field specifically is kinds of power experiment platform devices.
Background
In recent years, with the increasing requirements of power utilization systems on the quality of electric energy and the urgent need for energy conservation, emission reduction and environmental protection, research and application in aspects of power supply technology, power supply optimization management and the like also become key problems in various industries and fields, so that discipline specialities of power supplies or related to the power supplies are established in various universities and universities in China.
With the development of power electronic technology, especially the development of microelectronic technology, the development of computers, communication, industrial application, military industry, consumer electronics and the like is rapid, and the development trend of the power source, namely power source, of electronic equipment is also rapid, and the power source has the characteristics of high power density, low voltage, large current, digital intelligent control and modularization. Any electronic equipment and complete system cannot be powered reliably, which makes the requirement for power supply higher and higher in the modern times. In order to enable students to understand the technical principle of the power supply more deeply and deepen the study of theoretical knowledge, it is necessary to set up corresponding experimental courses. However, the current course experiments related to the novel power technology set up in schools cannot better achieve the purposes of combining theoretical knowledge and manually practicing and checking, and therefore experimental equipment needs to be perfected.
This experimental box utilizes TI company's chip, develops four experimental circuit boards that contain in the power experiment platform, this power experiment platform relates to linear direct current constant voltage power supply, BUCK step-down switching power supply, Boost type switching power supply and numerical control switching power supply, mutual independence between each module of experiment platform, can the exclusive use or design every modules, realize specific function.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, and provide kinds of power experiment platform devices, the device low price, repacking, upgrading convenience adopt modular structure, multiplicable all kinds of modules as required, can satisfy multiple power supply circuit experimental apparatus.
Realize the utility model discloses the technical scheme of purpose is:
kinds of power supply experiment platform device, including numerical control power module, LDO linear voltage regulator module, BUCK voltage reduction module, BOOST BOOST module, the power of numerical control power module output respectively with LDO linear voltage regulator module, BUCK voltage reduction module, BOOST BOOST module's signal input part is connected, BUCK voltage reduction module, BOOST BOOST module's signal output part is connected with LDO linear voltage regulator module's signal input part respectively, BUCK voltage reduction module's signal output part still is connected with BOOST BOOST module's signal input part, LDO linear voltage regulator module, BUCK voltage reduction module, the voltage that BOOST BOOST module signal output part output is measured and is shown in the oscilloscope with the universal meter.
The LDO linear voltage regulator module is based on an integrated linear voltage regulator (LDO) chip TPS7A4901 and comprises an adjusting tube, a reference voltage device, an error amplifier, an th resistor and a second resistor, wherein the ends of the reference voltage device and the adjusting tube are connected with a direct current stabilized voltage power supply, the other end of the reference voltage device is connected with the negative input end of the error amplifier, the signal output end of the error amplifier is connected with the adjusting tube, the other end of the adjusting tube is connected with the end of the th resistor, the negative input end of the error amplifier and the other end of the th resistor are respectively connected with the end of the second resistor, and the other end of the second resistor is grounded.
The BUCK voltage reduction module is a DC-DC conversion module based on an integrated voltage reduction type DC-DC converter chip TPS54160 and is used for reducing input voltage, enabling output voltage to be lower than input voltage and converting pulsating input current into continuous output current.
The BOOST module is based on a TPS55340 chip and is a switching direct-current BOOST circuit, and output voltage is higher than input voltage.
The numerical control power supply module comprises an STC single chip microcomputer module, an LM317 voltage stabilizing module, a nixie tube display module, a key circuit module, a filter amplifier module, an XL4015 voltage stabilizing circuit module, an input filter circuit module and an output filter circuit module; the STC single chip microcomputer module is respectively connected with the LM317 voltage stabilizing module, the nixie tube display module, the key circuit module and the filter amplifier module, the filter amplifier module is also connected with the XL4015 voltage stabilizing circuit module, and the XL4015 voltage stabilizing circuit module is also respectively connected with the input filter circuit module and the output filter circuit module; direct current regulated power supply flows into LM317 voltage stabilizing module and input filter circuit module respectively, inputs to STC single chip microcomputer module from LM317 voltage stabilizing module, through keying circuit input connection to STC single chip microcomputer module, and STC single chip microcomputer module control charactron module shows the voltage of output, and the IO mouth of STC single chip microcomputer produces the PWM signal simultaneously, goes to control XL4015 voltage stabilizing circuit module's reference voltage after filtering and amplifying to realize numerical control voltage source's output.
Advantageous effects
The utility model relates to a kinds of power experiment platform that provide, the device low price, the repacking, the upgrading convenience adopt modular structure, multiplicable all kinds of modules as required, continuously upgrade, not only can independent operation between each module, can also make up the operation, when using this power experiment platform device's a certain module, can adopt the different model chips of the same kind to carry out secondary development, contrast with having module parameter now, richen the resource of experiment platform simultaneously again.
Drawings
FIG. 1 is a block diagram illustrating the operation of power supply experiment platform devices;
FIG. 2 is a basic circuit diagram of an LDO linear regulator module;
FIG. 3 is a basic circuit diagram of the BUCK voltage reduction module;
FIG. 4 is a block diagram of a BOOST BOOST module;
FIG. 5 is a block diagram of a digital control power module;
FIG. 6 is a schematic diagram of the operation of the series linear voltage regulator circuit.
FIG. 7 is a schematic diagram of the BUCK voltage reduction module.
Fig. 8 is a schematic diagram of the operation of the BOOST module.
Fig. 9 is a working principle diagram of the numerical control power supply module.
Detailed Description
The invention will now be described by way of example and not limitation in with reference to the accompanying drawings.
As shown in figure 1, power supply experiment platform devices comprise a numerical control power supply module, an LDO linear voltage regulator module, a BUCK voltage reduction module and a BOOST boosting module, wherein a power supply output by the numerical control power supply module is respectively connected with the LDO linear voltage regulator module, the BUCK voltage reduction module and the signal input end of the BOOST boosting module, the signal output end of the BUCK voltage reduction module and the signal output end of the BOOST boosting module are respectively connected with the signal input end of the LDO linear voltage regulator module, the signal output end of the BUCK voltage reduction module is also connected with the signal input end of the BOOST boosting module, and voltages output by the signal output ends of the LDO linear voltage regulator module, the BUCK voltage reduction module and the BOOST boosting module are measured.
The LDO linear voltage regulator module is based on an integrated linear voltage regulator (LDO) chip TPS7A4901 and comprises a regulating tube, a reference voltage, an error amplifier, an th resistor and a second resistor, wherein the ends of the reference voltage and the regulating tube are connected with a direct current voltage regulator, the other 0 end of the reference voltage is connected with the negative input end of the error amplifier, the signal output end of the error amplifier is connected with the regulating tube, the other end of the regulating tube is connected with the end of a th resistor, the negative input end of the error amplifier and the other end of the th resistor are respectively connected with the end of the second resistor, the other end of the second resistor is grounded, the th resistor and the second resistor form a sampling circuit of a feedback network, the reference voltage is added to the inverting input end of the error amplifier, the sampling voltage is added to the non-inverting input end of the error amplifier, and the Vi is the input voltage regulator which is connected with the direct current voltage regulator.
The TPS7A4901 device is a positive, high voltage (+36V), ultra low noise (15.4mV RMS, 72dB PSRR) linear regulator with output load current up to 150 mA. that includes CMOS logic level compatible enable pins and a capacitive programmable soft start function, allowing for customized power management schemes other available functions include built-in current limiting and thermal shutdown protection to protect devices and systems in the event of a fault TPS7A4901 is designed using bipolar technology for high precision, high precision instrumentation, etc. this design makes it a power operational amplifier, analog to digital converter (ADCs), digital to analog converter (DACs) and good choices for other high performance analog circuits, furthermore, the TPS7A4901 linear regulator is suitable for post DC/DC converter regulation.
The linear voltage-stabilized power supply is a direct-current voltage-stabilized power supply with an adjusting tube working in a linear state, is linear voltage-stabilized power supply modules based on a linear voltage-stabilized power supply (LDO) chip TPS7A4901, has voltage input ports, voltage output ports, 5 test points and 9 jumper selection pins, can configure different working modes and working parameters of the module by enabling different jumpers, and is characterized in that the TPS7A4901 is a low-voltage difference linear integrated voltage-stabilized power supply chip which is provided with an enabling end (5 pins) and a soft starting end (6 pins) and is packaged by adopting 3mmX3 vson and suitable for micro power and applied in a low-voltage occasion, J7 is an input end, J8 is an output end, J3 and J4 select input filter capacitors, J5 and J6 select output filter capacitors with different sizes, the absorption voltage-dividing effect is different, R3 is an output sampling resistor 59692 under voltage division, R3523 is closed, R9 is a sampling resistor, J6342 is approximately equal to an internal sampling resistor, and a sampling resistor 11 is connected with a sampling resistor, and a sampling resistor is used for controlling an internal sampling resistor, and is used for controlling a sampling resistor connected with a sampling resistor 11, and a sampling resistor connected with a sampling resistor, and a sampling resistor when the sampling resistor, the sampling resistor is connected with a sampling resistor, and a sampling resistor connected with a sampling resistor, and a sampling resistor, wherein the sampling resistor, the sampling resistor is connected with a sampling resistor, the sampling resistor.
The BUCK voltage reduction module is a DC-DC conversion module based on an integrated voltage reduction type DC-DC converter chip TPS54160 and is used for reducing input voltage, enabling the output voltage to be lower than the input voltage and converting pulsating input current into continuous output current; the basic circuit of the BUCK voltage-reducing module is shown in fig. 3, wherein V is a MOSFET transistor.
The BUCK voltage reduction module is a basic switching regulator power topology, the switching regulator power comprises an input loop, a power converter, an output loop, a control circuit and the like, the BUCK voltage reduction module is DC-DC conversion modules based on an integrated BUCK DC-DC converter chip TPS54160, the TPS54160 device is a model 60V, 1.5A and BUCK DC-DC regulator with integrated high-side MOSFET, current mode control provides simple external compensation and flexible component selection, low ripple pulse jump modes reduce the no-load regulated output supply current to 116uA, the power-off supply current can be reduced to 1.3uA by using an enable pin, the under-voltage latch is internally set to be 2.5V, but can be improved by using the enable pin, the output voltage start ramp is controlled by a slow start pin, the pin can be further configured to control sequencing/tracking, open leakage supply normal signals indicate that the output is within 94% to 107% of the nominal voltage, a wide switching frequency range allows optimization of efficiency and external component size, and thermal shutdown protection under overload and thermal protection conditions.
The BUCK voltage reduction module is a DC-DC module based on an integrated voltage reduction type DC-DC conversion chip TPS54160, the input range of the module is 3V-60V, the maximum output load current is 1.5A, the BUCK voltage reduction module comprises voltage input ports, voltage output ports, 14 test points and 13 jumper selection pins, different working modes and working parameters of the module can be configured by enabling different jumpers to be conducted, as shown in FIG. 7, on an experimental board, J7 is an input end, J8 is an output end, J3 and J4 select the size of an input filter capacitor, J5 and J6 select the size of an output filter capacitor, different filter capacitor capacities have different ripple absorption effects, R3 is an output sampling lower voltage division resistor, R1, R2 and R3 are output sampling upper division resistors, the output sampling divided voltage is compared with a chip internal reference 1.194V, error voltage is used for controlling an internal PNP sampling tube, when the circuit normally works, the voltage of the internal PNP sampling tube is equal to an internal reference TP3 voltage, J11 is used for switching upper division voltage, the output voltage is approximately equal to an output voltage, the upper division resistor is approximately equal to a switching voltage, the output voltage of a switching voltage, the switching voltage is approximately equal to a switching voltage of a switching circuit, the switching voltage of a switching circuit is equal to a switching voltage of a switching circuit, the switching voltage.
The BOOST module is a BOOST module based on a TPS55340 chip, and is a switching direct current BOOST circuit, so that output voltage is higher than input voltage, the TPS55340 chip is an -model single-chip asynchronous switching regulator with an integrated 5A/40V power switch, the device can be configured in several standard switching regulator topologies, the topologies comprise BOOST, SEPIC and an isolation flyback, the TPS55340 chip uses current mode Pulse Width Modulation (PWM) to regulate output voltage, internal oscillators are arranged, the switching frequency of the PWM is set by external resistors or synchronous to external clock signals, a user can set the switching frequency between 100kHz and 1.2MHz, and as shown in FIG. 4, the whole BOOST module comprises a BOOST main circuit and a voltage feedback module.
The BOOST module is a BOOST regulator module based on a direct current BOOST regulator (BOOST) chip TPS55340, an input range of the BOOST module is 5-12V, and an output load voltage/maximum current is 24V/1.9A, as shown in fig. 8, the BOOST module includes 1 voltage input port (J4), 1 voltage output port (J3), 10 test points (TP 1-TP8, TP17-TP 18), and 11 jumper selection pins (J1-J2, J5-J9, J10, J17, J21, J22), and different working modes and working parameters of the BOOST module are configured by turning on different jumpers. The TPS54340 is a Boost type Boost integrated voltage regulator chip with an NMOS switch integrated therein, and the input voltage range is: 2.9-32 VDC; the output voltage is 38V at most; switching current peak 5A; the switching frequency is 100 kHz-1.2 MHz, and the resistance value is set by an external 10-pin resistor. The chip is provided with an enabling end, output is forbidden when 4 pins are low level, and a jumper wire cap J6 is connected with Vin (close to the left) during normal use; pin 5 is a soft start setup pin. And the 8-pin COMP is connected with an RC network and used for optimizing frequency response. Pin FB is the output sample feedback input, which is compared to the internal reference 1.229V, and the resulting error signal controls the PWM signal generator. After the circuit is stably operated, the voltage of the 9-pin (TP 7) should be equal to 1.229V. 1. The 2 pin is a switch output pin, the TP2 is a switch node, and rectangular waves can be measured by an oscilloscope in a CCM mode.
As shown in fig. 5, the numerical control power supply module includes an STC single chip module, an LM317 voltage regulator module, a nixie tube display module, a key circuit module, a filter amplifier module, an XL4015 voltage regulator circuit module, an input filter circuit module, and an output filter circuit module; the STC single chip microcomputer module is respectively connected with the LM317 voltage stabilizing module, the nixie tube display module, the key circuit module and the filter amplifier module, the filter amplifier module is also connected with the XL4015 voltage stabilizing circuit module, and the XL4015 voltage stabilizing circuit module is also respectively connected with the input filter circuit module and the output filter circuit module; direct current regulated power supply flows into LM317 voltage stabilizing module and input filter circuit module respectively, inputs to STC single chip microcomputer module from LM317 voltage stabilizing module, through keying circuit input connection to STC single chip microcomputer module, and STC single chip microcomputer module control charactron module shows the voltage of output, and the IO mouth of STC single chip microcomputer produces the PWM signal simultaneously, goes to control XL4015 voltage stabilizing circuit module's reference voltage after filtering and amplifying to realize numerical control voltage source's output.
XL4015 is the step-down BUCK integrated voltage regulator chip of internal integrated switch in the numerical control power module, and its input voltage scope: 8-36 VDC; the maximum output current is 5A; the switching frequency is 180kHz, the size of an external component can be reduced, and the EMC design is convenient. The chip has excellent linear regulation rate and load regulation rate. And reliability modules such as overcurrent protection, over-temperature protection, short-circuit protection and the like are integrated in the chip.
The LM317 circuit is linear voltage stabilizing circuits, the input 8-36V voltage is output to 3.3V for supplying power to the single chip microcomputer and the operational amplifier, the 3.3V voltage is also used as a power supply end of the potentiometer RP1, the potentiometer is adjusted, the sliding end of the potentiometer can output 0-3.3V voltage, and the voltage is used as the reference voltage of the comparator.
As shown in fig. 9, when the switch SW1 is switched to the "manual" mode, the voltage divided by the potentiometer is filtered by C4, R5 and C5 pi and then used as a reference of the comparator, and compared with the voltage divided by the output sampling voltage dividing resistors R10 and R11, the error voltage is sent to the FB input terminal of the switching regulator XL 4015. After the circuit is stabilized, the output sampling voltage division should be the same as the potentiometer voltage division. When the switch SW1 is switched to the program control mode, the reference voltage of the comparator is a direct current signal obtained by low-pass filtering the PWM signal of the single chip microcomputer, and the reference voltage of the comparator can be changed by changing the duty ratio of the PWM signal by the single chip microcomputer. The circuit input voltage is divided by R12 and R11 (VS 1) and then input to the AD input end of the singlechip, and the input voltage is displayed on the nixie tube after the operation of the singlechip. The circuit output voltage is divided by Ro2 and Ro1 and then (VS 2) is input to the AD input end of the singlechip, and the output voltage is displayed on the digital tube after the operation of the singlechip. The button S3 is a mode switching control button, and when S3 is pressed, the voltage displayed on the display can be switched between the input voltage and the output voltage. The input voltage is displayed when the led D3 is on and D2 is off, the output voltage is displayed when D3 is off and D2 is on, and the set value is displayed when D3 and D2 are on simultaneously. During setting, the duty ratio output by the singlechip can be controlled through the 'adding' and 'subtracting' keys, so that the output voltage is controlled; LMV358 acts as a two-way low voltage rail-to-rail output operational amplifier.
Module combination operation embodiment:
, BUCK → BUCK (secondary voltage reduction type combination)
The effect of feedback compensation on the load transient response of a current mode controlled BUCK regulator can be analyzed by setting dynamic load simulation with the TPS54160 regulator in the BUCK circuit.
The connection mode of the operation mode is as ① mode in fig. 1:
1) connecting the positive output end of the direct current power supply to the input end of the TPS54160 buck regulator to be tested;
2) connecting the negative output end of the direct current power supply to the ground end of the TPS54160 step-down voltage regulator to be tested;
3) connecting the output end of the TPS54160 step-down voltage regulator to be tested to the input end of the TPS54160 step-down voltage regulator which operates as a dynamic load;
4) connecting the ground terminal on the step-down voltage regulator TPS54160 under test to the ground terminal on the step-down voltage regulator TPS54160 operating as a dynamic load;
5) connecting a current probe to a channel of an oscilloscope, and clamping a connecting cable between an output end of a TPS54160 step-down voltage stabilizer to be tested and an input end of the TPS54160 step-down voltage stabilizer which operates as a dynamic load by using the current probe;
6) connecting the current probe to a channel of an oscilloscope, and clamping an induction resistor on a TPS54160 step-down voltage stabilizer to be tested by using the current probe;
7) connecting a voltage probe to a channel of an oscilloscope, and closely attaching the voltage probe to the output voltage of a TPS54160 step-down voltage stabilizer to be tested;
8) connecting the varistor between the output terminal and ground (on the tested TPS54160 buck regulator);
9) connecting a power resistor between the output terminal and the ground terminal (on the TPS54160 buck regulator operating as a dynamic load);
10) the output of the waveform generator is connected to the test pin (i.e., the feedback voltage of the TPS54160 buck regulator under test), which is done through a resistor.
Second, LDO → LDO, the operation mode is connected as ② mode in fig. 1:
investigating the influence of output capacitance on load transient response and input transient response
1) Connecting a positive (red) output end of a direct current power supply to an input end of a TPS7A4901LDO voltage regulator which operates as a dynamic source;
2) connecting the negative (black) output end of the direct current power supply to the grounding end of the TPS7A4901LDO voltage stabilizer which operates as a dynamic source;
3) connecting an output terminal of the TPS7A4901LDO voltage regulator which operates as a dynamic source to an input terminal of the TPS7A4901LDO voltage regulator to be tested;
4) connecting the ground terminal of the TPS7A4901LDO voltage regulator which operates as a dynamic source to the ground terminal of the tested TPS7A4901LDO voltage regulator;
5) power resistors of 5K omega and 50W are connected between the output end and the ground end (a connection terminal on a TPS7A4901LDO voltage regulator to be tested);
6) connecting a current probe to a channel of an oscilloscope, and clamping a connecting cable between an output end of a connecting terminal (on a TPS7A4901LDO voltage regulator which operates as a dynamic source) and an input end of the connecting terminal (on the TPS7A4901LDO voltage regulator to be tested) by using the current probe to ensure that an arrow printed on the probe clamp corresponds to current entering the TPS7A4901LDO voltage regulator to be tested;
7) connecting a voltage probe to a channel of the oscilloscope, and closely attaching the positive electrode tip of the voltage probe to a test pin (namely the output voltage of the TPS7A4901LDO voltage stabilizer to be tested), wherein the probe is used for measuring the direct current and alternating current components of the output voltage;
8) connecting a voltage probe to a channel of the oscilloscope, and closely attaching the positive electrode tip of the voltage probe to a test pin (namely the output voltage of the TPS7A4901LDO voltage regulator to be tested), wherein the probe is used for measuring the alternating current component of the output voltage;
9) connecting a voltage probe to a channel of an oscilloscope, and closely attaching the positive electrode tip of the voltage probe to a test pin (namely the input voltage of a TPS7A4901LDO voltage regulator to be tested);
10) the output of the waveform generator is connected to the test pin (i.e., the feedback voltage of the TPS7a4901LDO regulator operating as a dynamic source), and the connection is made through an injection resistor.
Thirdly, BUCK → LDO, the connection mode of the operation mode is ③ mode in FIG. 1:
the operation mode can reduce ripples, and the DC-DC realizes basically smooth voltage output through switch chopping, magneto-electric energy conversion of an inductor and capacitor filtering. The switching power supply has large output current, strong load carrying capacity and high conversion efficiency, but has high-frequency radiation due to switching action. The LDO realizes fixed voltage output by adjusting the input and output voltage difference of a triode or an MOS tube, basic elements are an adjusting tube and a voltage reference element, the voltage conversion process is continuous and smooth, and no switching action exists on a circuit. The LDO circuit has the characteristics of small output voltage ripple, weaker load carrying capacity and lower conversion efficiency.
The LDO power supply ripple has very positive technical indexes called Power Supply Rejection Ratio (PSRR), which is characterized by the ratio of input power supply variation to converter output variation, usually in decibels, and the graph shows that the PSRR in a very wide frequency domain range needs to meet the parameters required by a corresponding chip manual, and the higher the dB value of the corresponding PSRR, the stronger the anti-interference capability of the power supply is.
PSRR=20*log（Vin_ripple/Vout_ripple）
1) Connecting the positive output end of the direct current power supply to the input end of the TPS54160 buck regulator to be tested;
2) connecting the negative output end of the direct current power supply to the ground end of the TPS54160 step-down voltage regulator to be tested;
3) connecting the output end of the TPS54160 step-down voltage regulator to the input end of the TPS7A4901LDO voltage regulator;
4) connecting a ground terminal on the TPS54160 buck regulator to a ground terminal on the TPS7A4901LDO regulator;
5) connecting the current probe to a channel of an oscilloscope, and using a connecting cable between an output end on a TPS54160 step-down voltage regulator and an input end on a TPS7A4901LDO voltage regulator;
6) connecting a current probe to a channel of the oscilloscope, and clamping an induction resistor on the TPS54160 step-down voltage stabilizer by using the current probe;
7) connecting a voltage probe to a channel of the oscilloscope, and closely attaching the voltage probe to the output voltage of the TPS54160 step-down voltage stabilizer;
8) connecting the varistor between the output terminal and ground (on the TPS54160 buck regulator);
9) connecting a power resistor between the output end and the ground end (on the TPS7A4901LDO voltage regulator);
10) the output of the waveform generator is connected to the test pin (i.e., the feedback voltage of the TPS54160 buck regulator), which is done through a resistor.
Fourthly, BUCK → BOOST, the connection mode of the operation mode is ④ mode in FIG. 1:
the transmission line is resistive, with the longer the line the greater the resistance. In order to reduce the line loss, the power loss = the square of the current value flowing through the line resistance, and the line loss can be reduced only by reducing the current value flowing through the line resistance. Therefore, the voltage is increased to the electricity utilization place and then reduced.
The Buck-Boost circuit is also called a Buck-Boost conversion circuit, is a single-tube non-isolated direct current conversion circuit with output voltages which can be lower than or higher than an input voltage, but the polarity of the output voltage of the Buck-Boost conversion circuit is opposite to the input voltage.
1) Connecting the positive output end of the direct current power supply to the input end of the TPS54160 buck regulator to be tested;
2) connecting the negative output end of the direct current power supply to the ground end of the TPS54160 step-down voltage regulator to be tested;
3) connecting an output terminal of the TPS54160 buck regulator to an input terminal of the TPS55340 boost regulator;
4) connecting the ground terminal on the TPS54160 buck regulator to the ground terminal on the TPS55340 boost regulator;
5) connecting a current probe to a channel of the oscilloscope, and using a connecting cable between an output end on a TPS54160 step-down voltage stabilizer and an input end on a TPS55340 step-up voltage stabilizer;
6) connecting a current probe to a channel of the oscilloscope, and clamping an induction resistor on the TPS54160 step-down voltage stabilizer by using the current probe;
7) connecting a voltage probe to a channel of the oscilloscope, and clamping the voltage probe to be tightly attached to the output voltage of the TPS54160 step-down voltage stabilizer;
8) connecting the varistor between the output terminal and ground (on the TPS54160 buck regulator);
9) connecting a power resistor between the output end and the ground end (on the TPS55340 boosting voltage regulator);
10) the output of the waveform generator is connected to the test pin (i.e., the feedback voltage of the TPS54160 buck regulator), which is done through a resistor.
And V, BOOST → LDO, and the operation mode is connected as ⑤ mode in FIG. 1:
the TPS55340 boosting module is used for boosting the power supply to obtain voltages higher than the input voltage, and then the TPS7A4901LDO voltage stabilizer is used for carrying out voltage reduction processing on the obtained high voltage.
1) Connecting the positive output end of the direct current power supply to the input end of the TPS55340 boosting voltage stabilizer to be tested;
2) connecting the negative output end of the direct current power supply to the ground end of the TPS55340 boosting voltage stabilizer to be tested;
3) connecting the output end of the TPS55340 boosting voltage regulator to the input end of the TPS7A4901LDO voltage regulator;
4) connecting a ground terminal on the TPS55340 boosting voltage regulator to a ground terminal on the TPS7A4901LDO voltage regulator;
5) connecting a current probe to a channel of an oscilloscope, and using a connecting cable between an output end on a TPS55340 boost voltage stabilizer and an input end on a TPS7A4901LDO voltage stabilizer;
6) connecting a current probe to a channel of the oscilloscope, and clamping an induction resistor on the TPS55340 boosting voltage stabilizer by using the current probe;
7) connecting a voltage probe to a channel of the oscilloscope, and clamping the voltage probe to be tightly attached to the output voltage of the TPS55340 boosting voltage stabilizer;
8) connecting the rheostat between the output end and the ground end (on the TPS55340 boosting regulator);
9) connecting a power resistor between the output end and the ground end (on the TPS7A4901LDO voltage regulator);
10) the output end of the waveform generator is connected to a test pin (namely the feedback voltage of the TTPS55340 boost voltage regulator), and the connection process is completed through a resistor.
Claims (5)
1. power supply experiment platform device, which is characterized in that the device comprises a numerical control power supply module, an LDO linear voltage regulator module, a BUCK voltage reduction module and a BOOST voltage boosting module, wherein the power supply output by the numerical control power supply module is respectively connected with the LDO linear voltage regulator module, the BUCK voltage reduction module and the signal input end of the BOOST voltage boosting module, the signal output end of the BUCK voltage reduction module and the signal output end of the BOOST voltage boosting module are respectively connected with the signal input end of the LDO linear voltage regulator module, the signal output end of the BUCK voltage reduction module is also connected with the signal input end of the BOOST voltage boosting module, and the voltage output by the signal output end of the LDO linear voltage regulator module, the BUCK voltage reduction module and.
2. The power supply experiment platform device of claim 1, wherein the LDO linear regulator module is an integrated linear regulator (LDO) chip TPS7A4901 linear regulator module, and comprises a regulator tube, a reference voltage, an error amplifier, a th resistor and a second resistor, wherein ends 0 of the reference voltage and the regulator tube are connected to a DC regulated power supply, the other end of the reference voltage is connected to a negative input end of the error amplifier, a signal output end of the error amplifier is connected to the regulator tube, the other end of the regulator tube is connected to an end of a th resistor, the negative input end of the error amplifier and the other end of the th resistor are respectively connected to an end of the second resistor, and the other end of the second resistor is grounded.
3. The kinds of power supply experiment platform device of claim 1, wherein the BUCK voltage reduction module is a DC-DC conversion module based on an integrated BUCK DC-DC converter chip TPS54160, and is used for reducing the input voltage, making the output voltage lower than the input voltage, and converting the pulsating input current into a continuous output current.
4. The kinds of power supply experiment platform device of claim 1, wherein the BOOST module is a TPS55340 chip-based BOOST module, and is a switching DC BOOST circuit, so that the output voltage is higher than the input voltage.
5. The power supply experiment platform device according to claim 1, wherein the numerical control power supply module includes an STC single chip microcomputer module, an LM317 voltage regulator module, a nixie tube display module, a key circuit module, a filter amplifier module, an XL4015 voltage regulator circuit module, an input filter circuit module, and an output filter circuit module, the STC single chip microcomputer module is respectively connected with the LM317 voltage regulator module, the nixie tube display module, the key circuit module, and the filter amplifier module, the filter amplifier module is further connected with the XL4015 voltage regulator circuit module, and the 401XL 5 voltage regulator circuit module is further respectively connected with the input filter circuit module and the output filter circuit module.
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| CN116054307A (en) * | 2022-07-27 | 2023-05-02 | 荣耀终端有限公司 | Power supply control system and electronic equipment |
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| CN116054307A (en) * | 2022-07-27 | 2023-05-02 | 荣耀终端有限公司 | Power supply control system and electronic equipment |
| CN116054307B (en) * | 2022-07-27 | 2023-10-20 | 荣耀终端有限公司 | Power supply control system and electronic equipment |
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