CN215300236U

CN215300236U - Integrated ultrasonic power supply device and B-ultrasonic equipment

Info

Publication number: CN215300236U
Application number: CN202121751654.XU
Authority: CN
Inventors: 宋浩然; 凌灿; 柴小杰; 兰家富; 张黎辉
Original assignee: Shenzhen WellD Medical Electronics Co ltd
Current assignee: Shenzhen WellD Medical Electronics Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-12-24
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses an integrated supersound power supply unit and B ultrasonic equipment, supersound power supply unit include host system, input module, current detection module, control module, backlight module and output module: the main control module controls the charging state of the input module and performs temperature protection, and also controls the input module to perform overvoltage protection according to the power supply voltage input by the input module; the current detection module detects various currents in work and transmits the currents to the main control module; the control module transmits a control signal output by the singlechip to the main control module to adjust each output voltage, and the output working state of the main control module is transmitted to the singlechip through the control module; the main control module controls the backlight module to drive the backlight lamp, and the output module processes and outputs each output voltage output by the main control module. The main control module can directly output a plurality of output voltages without a plurality of power supply modules, so that crosstalk cannot occur and the signal-to-noise ratio is reduced; the device has overvoltage and temperature protection, and improves the use safety.

Description

Integrated ultrasonic power supply device and B-ultrasonic equipment

Technical Field

The utility model relates to the field of electronic technology, in particular to integrated supersound power supply unit and B ultrasonic equipment.

Background

The existing ultrasonic power supply system adopts a 12V power supply system, an adapter charges a battery through a charging chip, the adapter and the battery are switched to supply power through a power path management chip, then voltage conversion is carried out through various power supply chips, and various power supplies (such as 12V, 5V, 3.3V, 2.5V, 1.8V, 1.2V and the like) are output to supply power for a B-mode ultrasonic main board.

Meanwhile, in the discrete power supply scheme (that is, each power supply is generated by an independent circuit (consisting of a corresponding power supply chip and a peripheral circuit thereof)), each power supply chip has certain power loss, so that the energy consumption of the whole power supply is influenced, and the power supply duration of a battery and the service life of the battery are also influenced.

Due to different operating environments of different power supply chips, crosstalk among the power supply chips can reduce the signal-to-noise ratio of the whole power supply, and adverse effects are brought to the processing of the later-stage ultrasonic signals; while also affecting the subsequent detection of electromagnetic compatibility.

In addition, the power supply scheme is very inconvenient to expand and apply on some miniaturized equipment, and the vehicle-mounted charger and the seat type charger commonly used by the client terminal need to be upgraded again; are not compatible with the existing popular USB power supplies.

Thus, the prior art has yet to be improved and enhanced.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide an integrated ultrasonic power supply device and B-ultrasonic equipment, so as to solve the problem that the power chips used by the existing discrete power supply schemes are more likely to interfere with each other.

In order to achieve the purpose, the utility model adopts the following technical proposal:

an integrated ultrasonic power supply device is connected with a single chip microcomputer and comprises a main control module, an input module, a current detection module, a control module, a backlight module and an output module: the input module, the current detection module, the control module, the backlight module and the output module are all connected with the main control module; the control module is connected with the singlechip;

the main control module controls the charging state of the input module and performs temperature protection, and also controls the input module to perform overvoltage protection according to the power supply voltage input by the input module;

the current detection module detects various currents in work and transmits the currents to the main control module;

the control module transmits a control signal output by the singlechip to the main control module to adjust each output voltage, and the output working state of the main control module is transmitted to the singlechip through the control module;

the main control module controls the backlight module to drive the backlight lamp, and the output module processes and outputs each output voltage output by the main control module.

In the integrated ultrasonic power supply device, the main control module comprises a power supply chip; the input module comprises a first interface, a second interface, a first switching tube, a second switching tube, a first inductor, a first capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor;

the BAT pin of the first interface is connected with the drain electrode of the first switch tube and the BAT pin of the power chip, the source electrode of the first switch tube is connected with the voltage total output end and the VOUT pin of the power chip, the grid electrode of the first switch tube is connected with the IDGATE pin of the power chip, the GND pin of the first interface is grounded, and the NTC pin of the first interface is connected with one end of the third resistor; the VUSB pin of the second interface is connected with one end of the first capacitor, the drain electrode of the second switch tube and one end of the second resistor through the first inductor; the other end of the first capacitor is connected with a GND pin and a ground of the second interface through a first resistor, a source electrode of the second switching tube is connected with a power supply end and a VBUS pin of the power chip, a grid electrode of the second switching tube is connected with an OVGATE pin of the power chip, and the other end of the second resistor is connected with an OVSENS pin of the power chip; the other end of the third resistor is connected with an NTC pin of the power supply chip, one end of the fourth resistor and one end of the fifth resistor; the other end of the fourth resistor is grounded, and the other end of the fifth resistor is connected with an NTCBIAS pin of the power supply chip.

In the integrated ultrasonic power supply device, the input module further comprises a second capacitor, a third capacitor, a fourth capacitor and a sixth resistor;

one end of the second capacitor is connected with the BAT pin of the first interface and the drain electrode of the first switch tube, the other end of the second capacitor is connected with the GND pin of the first interface and the ground through a sixth resistor, the third capacitor is connected between the source electrode of the first switch tube and the ground, and the fourth capacitor is connected between the VBUS pin of the power supply chip and the ground.

In the integrated ultrasonic power supply device, the current detection module comprises a seventh resistor, an eighth resistor, a ninth resistor and a tenth resistor;

the seventh resistor is connected between a power supply end and an ILIM0 pin of the power supply chip, the eighth resistor is connected between an ILIM1 pin of the power supply chip and the ground, the ninth resistor is connected between a CLPROG pin of the power supply chip and the ground, and the tenth resistor is connected between the PROG pin of the power supply chip and the ground.

In the integrated ultrasonic power supply device, the control module comprises a third interface, a button switch, an eleventh resistor, a twelfth resistor, a thirteenth resistor and a fifth capacitor;

the 1 st pin of the third interface is connected with a power supply chip

The pin and one end of the button switch, the other end of the button switch is grounded; a 2 nd pin of the third interface is connected with the power supply end, the DVCC pin of the power supply chip and one end of a fifth capacitor; the other end of the fifth capacitor is grounded; the 3 rd pin, the 4 th pin, the 6 th pin and the 11 th pin of the third interface, the PWR _ ON pin, the SCL pin, the SDA pin of the power chip,

The feet are connected in a one-to-one way; a pin 5 of the third interface is connected with a PBSTAT pin of the power supply chip and one end of an eleventh resistor, a pin 7 of the third interface is connected with a PG _ DCDC pin of the power supply chip and one end of a twelfth resistor, and a pin 9 of the third interface is connected with a WAKE pin of the power supply chip and one end of a thirteenth resistor; the other end of the eleventh resistor, the other end of the twelfth resistor, the other end of the thirteenth resistor, the 8 th pin of the third interface, the 10 th pin of the third interface and the 12 th pin of the third interface are all grounded.

In the integrated ultrasonic power supply device, the backlight module comprises a diode, a backlight lamp, a second inductor, a fourteenth resistor, a fifteenth resistor, a sixth capacitor, a seventh capacitor and an eighth capacitor;

one end of the second inductor is connected with the SW pin of the power supply chip and the anode of the diode; the other end of the second inductor is connected with the voltage main output end and is grounded through an eighth capacitor; the cathode of the diode is connected with one end of the fourteenth resistor, one end of the sixth capacitor and one end of the seventh capacitor, and the anode of the backlight lamp is connected with the cathode of the diode and the backlight power supply end; the other end of the fourteenth resistor is connected with an LED _ OV pin of the power supply chip; the other end of the sixth capacitor is connected with the cathode of the backlight lamp, the ILED pin of the power supply chip and the backlight ground; the fifteenth resistor is connected between the ILED _ FS pin of the power chip and ground.

In the integrated ultrasonic power supply device, the output module comprises a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a first voltage conversion circuit, a second voltage conversion circuit, a third voltage conversion circuit, a fourth voltage conversion circuit and a fifth voltage conversion circuit;

one end of the ninth capacitor is connected with a VINDO 1 pin and a second voltage end of the power chip, the other end of the ninth capacitor is grounded, one end of the tenth capacitor is connected with a VINDO 2 pin and a first voltage end of the power chip, the other end of the tenth capacitor is grounded, one end of the eleventh capacitor is connected with a VIN12 pin and a voltage total output end of the power chip, the other end of the eleventh capacitor is grounded, one end of the twelfth capacitor is connected with a VIN2 pin and a voltage total output end of the power chip, the other end of the twelfth capacitor is grounded, the first voltage conversion circuit is connected with an LDO1 pin and an LDO1_ FB pin of the power chip, the second voltage conversion circuit is connected with an LDO2 pin and an LDO2_ FB pin of the power chip, the third voltage conversion circuit is connected with an SW 23 pin and an FB1 pin of the power chip, the fourth voltage conversion circuit is connected with an SW2 pin and an FB2 pin of the power chip, and the fifth voltage conversion circuit is connected with an SW3 pin and an FB3 pin of the power chip.

In the integrated ultrasonic power supply device, the first voltage conversion circuit comprises a sixteenth resistor, a seventeenth resistor and a thirteenth capacitor;

one end of the sixteenth resistor is connected with an LDO1 pin of the power chip, one end of the thirteenth capacitor and the first voltage stabilizing end, the other end of the sixteenth resistor is connected with an LDO1_ FB pin of the power chip and one end of the seventeenth resistor, and the other end of the seventeenth resistor is connected with the other end of the thirteenth capacitor and the ground.

In the integrated ultrasonic power supply device, the third voltage conversion circuit includes a third inductor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a fourteenth capacitor and a fifteenth capacitor;

one end of the third inductor is connected with an SW1 pin of the power chip; the other end of the third inductor is connected with one end of an eighteenth resistor, one end of a fifteenth capacitor and the first voltage end; the other end of the eighteenth resistor is connected with one end of the fourteenth capacitor and one end of the nineteenth resistor; the other end of the fourteenth capacitor is connected with the FB1 pin of the power supply chip, the other end of the nineteenth resistor and one end of the twentieth resistor; the other end of the fifteenth capacitor is connected with the other end of the twentieth resistor and the ground.

A B-ultrasonic equipment comprises a circuit board, wherein a singlechip and the integrated ultrasonic power supply device are arranged on the circuit board; the integrated ultrasonic power supply device is connected with the single chip microcomputer;

the ultrasonic power supply device outputs a plurality of output voltages after detecting the power supply voltage is stable, adjusts each output voltage according to the control signal output by the single chip microcomputer, and feeds back the working state to the single chip microcomputer.

Compared with the prior art, the utility model provides an integrated supersound power supply unit and B ultrasonic equipment, supersound power supply unit include host system, input module, current detection module, control module, backlight module and output module: the input module, the current detection module, the control module, the backlight module and the output module are all connected with the main control module; the control module is connected with the singlechip; the main control module controls the charging state of the input module and performs temperature protection, and also controls the input module to perform overvoltage protection according to the power supply voltage input by the input module; the current detection module detects various currents in work and transmits the currents to the main control module; the control module transmits a control signal output by the singlechip to the main control module to adjust each output voltage, and the output working state of the main control module is transmitted to the singlechip through the control module; the main control module controls the backlight module to drive the backlight lamp, and the output module processes and outputs each output voltage output by the main control module. The main control module can directly output a plurality of output voltages without a plurality of power supply modules, so that crosstalk cannot occur and the signal-to-noise ratio is reduced; the output voltage can be adjusted according to the single chip microcomputer, so that unnecessary power loss is reduced; the device has overvoltage and temperature protection, and improves the use safety.

Drawings

Fig. 1 is a block diagram of a B-ultrasonic apparatus provided by the present invention.

Fig. 2 is a circuit diagram of a portion of an integrated ultrasonic power supply apparatus provided by the present invention.

Fig. 3 is another circuit diagram of the integrated ultrasonic power supply apparatus provided by the present invention.

Detailed Description

The utility model provides an integrated supersound power supply unit and B ultrasonic equipment. In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1, an embodiment of the present invention provides a B-mode ultrasonic apparatus, which includes a circuit board, the circuit board is provided with an integrated ultrasonic power supply device 10 and a single chip microcomputer 20, the ultrasonic power supply device is connected to the single chip microcomputer, the ultrasonic power supply device outputs a plurality of output voltages after detecting a stable power voltage, and adjusts each output voltage according to a control signal output by the single chip microcomputer, and feeds back a working state to the single chip microcomputer. The ultrasonic power supply device can also be applied to other equipment requiring power supply by a plurality of output voltages, such as ultrasonic therapeutic equipment.

The integrated ultrasonic power supply device comprises a main control module 11, an input module 12, a current detection module 13, a control module 14, a backlight module 15 and an output module 16; the input module 12, the current detection module 13, the control module 14, the backlight module 15 and the output module 16 are all connected with the main control module 11; the control module 14 is connected with the singlechip 20; the main control module 11 controls the charging state of the input module 12 and performs temperature protection, and also controls the input module 12 to perform overvoltage protection according to the power supply voltage input by the input module 12; the current detection module 13 detects various currents during working and transmits the currents to the main control module 11; the control module 14 transmits a control signal output by the single chip microcomputer to the main control module 11 to adjust each output voltage, the main control module 11 outputs a working state and transmits the working state to the single chip microcomputer through the control module 14, the main control module 11 controls the backlight module 15 to drive a backlight, and the output module 16 processes each output voltage output by the main control module 11 and then outputs the processed voltage.

Referring to fig. 2 and 3 together (the fig. is divided into 2, the output module 16 is composed of the parts shown by the reference numerals 16_1 and 16_2, and the power chip U1 is composed of the parts shown by the reference numerals U1_1 and U1_ 2), the main control module 11 includes a power chip U1 preferably of LTC3577EUFF type; the input module 12 includes a first interface J1, a second interface J2, a first switch tube Q1, a second switch tube Q2, a first inductor L1, a first capacitor C1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a fifth resistor R5; the BAT pin of the first interface J1 is connected with the drain of the first switch tube Q1 and the BAT pin of the power chip U1, the source of the first switch tube Q1 is connected with the total voltage output end (transmitting the total output voltage VOUT) and the VOUT pin of the power chip U1, the grid of the first switch tube Q1 is connected with the IDGATE pin of the power chip U1, the GND pin of the first interface J1 is grounded, and the NTC pin of the first interface J1 is connected with one end of the third resistor R3; the VUSB pin of the second interface J2 is connected to one end of the first capacitor C1, the drain of the second switch Q2 and one end of the second resistor R2 through the first inductor L1; the other end of the first capacitor C1 is connected to the GND pin of the second interface J2 and the ground through a first resistor R1, the source of the second switch Q2 is connected to the power supply terminal (transmitting power supply voltage VBUS) and the VBUS pin of the power chip U1, the gate of the second switch Q2 is connected to the OVGATE pin of the power chip U1, and the other end of the second resistor R2 is connected to the OVSENS pin of the power chip U1; the other end of the third resistor R3 is connected with the NTC pin of the power chip U1, one end of the fourth resistor R4 and one end of the fifth resistor R5; the other end of the fourth resistor R4 is grounded, and the other end of the fifth resistor R5 is connected to the NTCBIAS pin of the power chip U1.

The first interface J1 is a battery connector for connecting a 4.2V battery (e.g., 18650 battery cells). The first switch tube Q1 (PMOS tube) is an auxiliary tube for supplying power to the battery, when the electricity needs a large current instantly, the IDGATE pin of the power chip U1 outputs a low level to control the conduction of the first switch tube Q1 (PMOS tube), and the battery voltage is output (becomes total output voltage VOUT at this time) to the rear stage of the load through the diode inside the first switch tube Q1, so that the synchronous power supply of the battery to the load is realized.

The second interface J2 is a USB connector, and is used for externally connecting a 5V adapter or a USB interface and providing a 5V power supply for a power supply system. The first inductor L1, the first capacitor C1 and the first resistor R1 form a 5V input LC filter circuit, and the first resistor R1 can effectively reduce ripple current brought by plugging and unplugging of a peripheral connected with the second interface J2. The second resistor R2 and the second switch tube Q (NMOS tube) form an overvoltage protection circuit, R2 is an input resistor of an overvoltage voltage monitoring point, the voltage of a power supply is transmitted to an OVSENS pin of a power supply chip U1, and when the power supply chip U1 judges overvoltage, the corresponding level is output through the OVGATE pin to control the disconnection of the Q2, so that overvoltage protection can be realized; after the normal state is recovered, the Q2 is controlled to be conducted, and the power supply voltage VBUS is transmitted to the power supply chip U1.

When the power input comes from the USB connector, limited input current needs to be distributed between the power output and the battery charger by using a logic circuit in the power chip U1, so that the charging current is reduced, and the power supply of a load is preferentially ensured; when the load is large, the battery can supplement power supply, so that the stable operation of the equipment is ensured.

The third resistor R3, the fourth resistor R4 and the fifth resistor R5 form a feedback circuit for protecting the temperature of the battery; r4 is a thermistor, the resistance of which changes with the temperature, thus causing the voltage on the NTCBIAS pin and NTC pin to change, and the power chip determines the charging voltage and current according to the voltage change, and whether the charging needs to be suspended so as to protect the whole power system.

Preferably, the input module 12 further includes a second capacitor C2, a third capacitor C3, a fourth capacitor C4 and a sixth resistor R6; one end of the second capacitor C2 is connected to the BAT pin of the first interface J1 and the drain of the first switch tube Q1, the other end of the second capacitor C2 is connected to the GND pin of the first interface J1 and the ground through the sixth resistor R6, the third capacitor C3 is connected between the source of the first switch tube Q1 and the ground, and the fourth capacitor C4 is connected between the VBUS pin of the power chip U1 and the ground.

The second capacitor C2 is a filtering energy storage capacitor at the input end of the battery, the sixth resistor R6 can effectively reduce ripple current caused by the battery plugging, the third capacitor C3 is a filtering energy storage capacitor for outputting the total voltage VOUT, and the fourth capacitor C4 is a filtering energy storage capacitor for the power voltage VBUS.

The current detection module 13 comprises a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a tenth resistor R10; the seventh resistor R7 is connected between a power supply end and an ILIM0 pin of the power chip U1, the eighth resistor R8 is connected between an ILIM1 pin of the power chip U1 and the ground, the ninth resistor R9 is connected between a CLPROG pin of the power chip U1 and the ground, and the tenth resistor R10 is connected between a PROG pin of the power chip U1 and the ground.

Among them, the seventh resistor R7 and the eighth resistor R8 are setting resistors for input current, which can set the maximum value of the current input to the system by being connected to a high level (i.e., connected to the power source terminal) or a low level (i.e., grounded). The ninth resistor R9 is a current setting resistor for outputting the total voltage VOUT, and the tenth resistor R10 is a setting resistor for the charging current, which determines the maximum charging current. The 4 resistors cooperate with the power chip U1 to accomplish the current distribution.

The control module 14 comprises a third interface J3, a push button switch PB, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13 and a fifth capacitor C5; the 1 st pin of the third interface J3 is connected with a power supply chip U1

A pin and one end of a push-button switch PB, the other end of the push-button switch PB being grounded; the 2 nd pin of the third interface J3 is connected to a power supply terminal (transmitting supply voltage DVCC), a DVCC pin of the power chip U1 and one end of a fifth capacitor C5; the other end of the fifth capacitor C5 is grounded;

pins

3, 4, 6, and 11 of the third interface J3, and the PWR _ ON pin, SCL pin, SDA pin of the power chip U1,

The feet are connected in a one-to-one way; the 5 th pin of the third interface J3 is connected with the PBSTAT pin of the power chip U1 and one end of an eleventh resistor R11, the 7 th pin of the third interface J3 is connected with the PG _ DCDC pin of the power chip U1 and one end of a twelfth resistor R12, and the 9 th pin of the third interface J3 is connected with the WAKE pin of the power chip U1 and one end of a thirteenth resistor R13; the other end of the eleventh resistor R11, the other end of the twelfth resistor R12, the other end of the thirteenth resistor R13, the 8 th pin of the third interface J3, the 10 th pin of the third interface J3 and the 12 th pin of the third interface J3 are all grounded.

The third interface J3 is a 2 × 6 connector (model HD2X 6), and is used for communicating with the single chip microcomputer, outputting the real-time working state of the ultrasonic power supply device to the single chip microcomputer, and receiving a control signal output by the single chip microcomputer to adjust the working state of the power supply chip. The PWR _ ON signal is used to enable the various voltage conversion circuits in the output block, and the PBSTATE signal is used to indicate the state of the pushbutton switch PB; the SCL signal and the SDA signal are IIC signals and are used for communicating with a main control singlechip; the WAKE signal is used for indicating the output states of the output voltages VOUT 1-VOUT 3, the CHRG signal is used for displaying the charging state, and the DVCC represents the power supply voltage.

The button switch PB outputs a corresponding POWER signal to turn on or turn off the output of a rear-stage power supply (LDO 1-LDO 2, VOUT 1-VOUT 3) after being pressed; c5 is a filtering energy storage capacitor for the supply voltage DVCC; r11 is a pull-up resistor for the button state; r12 is the power supply output ready pull-up resistor; r13 is the pull-up resistance for the awake state.

The backlight module 15 comprises a diode D1, a backlight LED, a second inductor L2, a fourteenth resistor R14, a fifteenth resistor R15, a sixth capacitor C6, a seventh capacitor C7 and an eighth capacitor C8; one end of the second inductor L2 is connected with the SW pin of the power chip U1 and the anode of the diode D1; the other end of the second inductor L2 is connected with the voltage total output end and is also grounded through an eighth capacitor C8; the cathode of the diode D1 is connected to one end of the fourteenth resistor R14, one end of the sixth capacitor C6 and one end of the seventh capacitor C7, and the anode of the backlight LED is connected to the cathode of the diode D1 and the backlight power supply terminal (providing backlight power supply LED +, for example 9.3V); the other end of the fourteenth resistor R14 is connected with an LED _ OV pin of the power chip U1; the other end of the sixth capacitor C6 is connected with the cathode of the backlight LED, the ILED pin of the power supply chip U1 and the backlight ground LED-; the fifteenth resistor R15 is connected between the ILED _ FS pin of the power chip U1 and ground.

Wherein, R14, R15, C6, C7, D1, L2 and C8 jointly form a backlight driving circuit of the backlight LED; r15 is used to set the value of the maximum current of the backlight LED output; l2 is the oscillating inductance of the backlight LED, and C8 is the filtering energy storage capacitor that outputs the total voltage VOUT.

The output module 16 includes a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a first voltage converting circuit 161, a second voltage converting circuit 162, a third voltage converting circuit 163, a fourth voltage converting circuit 164, and a fifth voltage converting circuit 165; one end of the ninth capacitor C9 is connected to the VINLDO1 pin and the second voltage terminal of the power chip U1 (providing the second voltage VOUT 2), the other end of the ninth capacitor C9 is grounded, one end of the tenth capacitor C10 is connected to the VINLDO2 pin and the first voltage terminal of the power chip U1 (providing the first voltage VOUT 1), the other end of the tenth capacitor C10 is grounded, one end of the eleventh capacitor C11 is connected to the VIN12 pin and the voltage total output terminal of the power chip U1 (providing the output total voltage VOUT), the other end of the eleventh capacitor C11 is grounded, one end of the twelfth capacitor C12 is connected to the VIN2 pin and the voltage total output terminal of the power chip U1, the other end of the twelfth capacitor C12 is grounded, the first voltage conversion circuit 161 is connected to the LDO1 pin and the LDO1_ FB pin of the power chip U1, the second voltage conversion circuit 162 is connected to the LDO1 pin and the SW 1_ FB pin of the power chip U1, the fourth voltage converting circuit 164 is connected to the SW2 pin and the FB2 pin of the power chip U1, and the fifth voltage converting circuit 165 is connected to the SW3 pin and the FB3 pin of the power chip U1.

The ninth capacitor C9 is a filter storage capacitor at the input terminal of the first voltage converting circuit 161, the tenth capacitor C10 is a filter storage capacitor at the input terminal of the second voltage converting circuit 162, the eleventh capacitor C11 is a filter storage capacitor at the input terminal of the third voltage converting circuit 163 and the fourth voltage converting circuit 164, and the twelfth capacitor C12 is a filter storage capacitor at the input terminal of the fifth voltage converting circuit 165. The first voltage conversion circuit 161 samples and filters the first regulated LDO1 (2.5V) output by the power chip U1 and outputs the sampled and filtered first regulated LDO 1; the second voltage conversion circuit 162 samples and filters the second regulated LDO2 (1.2V) output by the power chip U1, and outputs the sampled and filtered second regulated LDO 2; the third voltage conversion circuit 163 stores, samples and filters the output first voltage VOUT1 (1.8V) and outputs the voltage; the fourth voltage conversion circuit 164 stores, samples and filters the output second voltage VOUT2 (D3V) and outputs the second voltage VOUT 2; the fifth voltage conversion circuit 165 stores, samples, filters, and outputs the output third voltage VOUT3 (A3V).

In this embodiment, the first voltage conversion circuit 161 and the second voltage conversion circuit 162 have the same circuit structure, and are different from each other in the pin connected to the power supply chip U1. Here, the first voltage conversion circuit 161 is taken as an example, and includes a sixteenth resistor R16, a seventeenth resistor R17 and a thirteenth capacitor C13; one end of the sixteenth resistor R16 is connected to the LDO1 pin of the power chip U1, one end of the thirteenth capacitor C13, and the first regulated end (outputting the first regulated LDO 1), the other end of the sixteenth resistor R16 is connected to the LDO1_ FB pin of the power chip U1 and one end of the seventeenth resistor R17, and the other end of the seventeenth resistor R17 is connected to the other end of the thirteenth capacitor C13 and ground.

Wherein, R16 and R17 are voltage dividing network resistors of the feedback portion of the first voltage converting circuit 161, and are used for performing voltage dividing sampling on the first regulated LDO1 output by the LDO1 pin, and feeding back to the power chip to determine whether the voltage value of the first regulated LDO1 is correct and stable. C13 is the filter storage capacitor at the first regulated terminal.

The third voltage conversion circuit 163, the fourth voltage conversion circuit 164, and the fifth voltage conversion circuit 165 have the same circuit configuration, except for a pin connected to the power supply chip U1. Taking the third voltage converting circuit 163 as an example, it includes a third inductor L3, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a fourteenth capacitor C14 and a fifteenth capacitor C15; one end of the third inductor L3 is connected with the SW1 pin of the power supply chip U1; the other end of the third inductor L3 is connected to one end of the eighteenth resistor R18, one end of the fifteenth capacitor C15, and the first voltage terminal (providing the first voltage VOUT 1); the other end of the eighteenth resistor R18 is connected with one end of the fourteenth capacitor C14 and one end of the nineteenth resistor R19; the other end of the fourteenth capacitor C14 is connected with the FB1 pin of the power chip U1, the other end of the nineteenth resistor R19 and one end of the twentieth resistor R20; the other end of the fifteenth capacitor C15 is connected to the other end of the twentieth resistor R20 and ground.

Wherein, L3 is the oscillating inductance, and the RC circuit composed of R18 and C14 can effectively reduce the ringing response brought by L3 oscillation; r19 and R20 are the divider network resistors of the feedback part, and C15 is the filter energy storage capacitor of the output terminal.

With continuing reference to fig. 1 and 2, the operating principle of the B-mode ultrasound apparatus is as follows:

the system is powered on, when the power chip U1 detects that the input power voltage VBUS is in a safe range, the power chip U2 is controlled to turn on the power voltage VBUS and output the power voltage VBUS to the power chip U1; when the power supply voltage VBUS is detected to exceed the safe voltage (currently 6V), the input Q2 cannot be turned on, and at this time, the adapter of the power supply voltage VBUS may be selected incorrectly, the adapter is replaced, or the voltage drops to within the safe voltage range, so that the power supply voltage VBUS can be input to the power supply chip U1.

The current detection module 13 detects input and output (including charging) currents to ensure that no overcurrent risk occurs; according to the actual load requirement, the magnitude of the charging current is adjusted, and the requirement of ultrasonic work on a power supply is met preferentially.

When the button switch PB is pressed for 0.5 second, each voltage conversion circuit of the rear stage starts to work; and 5 seconds of long pressing, the voltage conversion circuit of the later stage stops working. The button type control can also be synchronously controlled by a singlechip, and the singlechip controls the time length of the POWERON signal to be low level to replace the pressing of the button; if the time of the low level exceeds the preset value, the ultrasonic power supply is shut down for 5 seconds, and damage to the ultrasonic mainboard caused by system crash can be effectively solved.

After stable operation, the power chip U1 outputs seven voltages externally, the ultrasonic main board is powered by 5 voltages (i.e., LDO1, LDO2, VOUT1, VOUT2, VOUT 3), and the display screen of the ultrasonic device is powered by 1 voltage (i.e., LED + 9.3V); the 1-path voltage is standby voltage and supplies power to the singlechip; while the battery is charged by the charger circuit.

The state of the power supply system can be transmitted to the singlechip in real time through a standard IIC bus (SDA signal and SCL signal), and mainly comprises a charging state, a temperature state of a battery, a switch button state, a total output preparation completion state, a preparation state output by each voltage conversion circuit and the like; the singlechip can also adjust the frequency and the working condition of voltage conversion, the current of the backlight power supply and the working mode in real time through the IIC bus

To sum up, in the integrated ultrasonic power supply device and the B-ultrasonic equipment provided by the utility model, the power management function is integrated in a single power chip with 4mm × 7 mm, thereby reducing the complexity, cost and circuit board area of the equipment; the power chip outputs five paths of high-precision low-voltage power supplies to complete the power supply of the ultrasonic main circuit; 5V power supply is adopted, and a battery connector and a USB connector are arranged, so that various input power supplies can be efficiently distributed and switched, and the compatibility of other voltage type adapters is improved; the backlight module is arranged to provide back illumination to the LCD display. The modules are integrated together, so that the efficiency of a power supply system is greatly improved, and the power supply time of a battery in single circulation is also greatly improved; the problem of short ultrasonic endurance is effectively solved. The output control and charging state can be realized through a peripheral circuit, and can also be communicated with a power supply chip through an IIC bus, the state of an output power supply can be adjusted in real time according to needs, the output of the power supply is accurately controlled and adjusted, and unnecessary power supply loss is greatly reduced.

Meanwhile, the power output of the rear stage is turned on or off according to the button switch, allowing the user to forcibly perform button control of the hard reset when the microcontroller does not respond. This "instant on" type of operation of power path control, input overvoltage protection for devices operating in harsh environments, and adjustable slew rates on switching power supplies reduces EMI while optimizing power supply efficiency.

The division of the functional modules is only used for illustration, and in practical applications, the functions may be distributed by different functional modules according to needs, that is, the functions may be divided into different functional modules to complete all or part of the functions described above.

It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.

Claims

1. The utility model provides an integrated supersound power supply unit, connects the singlechip, its characterized in that includes host system, input module, current detection module, control module, backlight module and output module: the input module, the current detection module, the control module, the backlight module and the output module are all connected with the main control module; the control module is connected with the singlechip;

2. The integrated ultrasound powering device according to claim 1, wherein the main control module comprises a power chip; the input module comprises a first interface, a second interface, a first switching tube, a second switching tube, a first inductor, a first capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor;

3. The integrated ultrasound powering device according to claim 2, wherein the input module further comprises a second capacitor, a third capacitor, a fourth capacitor and a sixth resistor;

4. The integrated ultrasound powering device according to claim 2, wherein the current detection module comprises a seventh resistor, an eighth resistor, a ninth resistor and a tenth resistor;

5. The integrated ultrasound powering device according to claim 2, wherein the control module comprises a third interface, a push button switch, an eleventh resistor, a twelfth resistor, a thirteenth resistor and a fifth capacitor;

the 1 st pin of the third interface is connected with a power supply chip

The feet are connected in a one-to-one way; the 5 th pin of the third interface is connected with the PBSTAT pin of the power supply chip and one end of the eleventh resistor, the fifth pinA pin 7 of the third interface is connected with a PG _ DCDC pin of the power supply chip and one end of a twelfth resistor, and a pin 9 of the third interface is connected with a WAKE pin of the power supply chip and one end of a thirteenth resistor; the other end of the eleventh resistor, the other end of the twelfth resistor, the other end of the thirteenth resistor, the 8 th pin of the third interface, the 10 th pin of the third interface and the 12 th pin of the third interface are all grounded.

6. The integrated ultrasound powering device according to claim 2, wherein the backlight module comprises a diode, a backlight, a second inductor, a fourteenth resistor, a fifteenth resistor, a sixth capacitor, a seventh capacitor and an eighth capacitor;

7. The integrated ultrasound powering device according to claim 2, wherein the output module comprises a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a first voltage converting circuit, a second voltage converting circuit, a third voltage converting circuit, a fourth voltage converting circuit and a fifth voltage converting circuit;

8. The integrated ultrasound powering device according to claim 7, wherein the first voltage converting circuit comprises a sixteenth resistor, a seventeenth resistor and a thirteenth capacitor;

9. The integrated ultrasound powering device according to claim 7, wherein the third voltage converting circuit comprises a third inductor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a fourteenth capacitor and a fifteenth capacitor;

10. A B-ultrasonic apparatus comprising a circuit board, wherein the circuit board is provided with a single chip microcomputer and an integrated ultrasonic power supply device according to any one of claims 1 to 9; the integrated ultrasonic power supply device is connected with the single chip microcomputer;