Non-polar direct current power conversion circuit and module
By employing four switches with specific connections and corresponding gate-source withstand voltage configurations in the H-bridge non-polarized circuit, the problems of complex circuit structure and high cost in the prior art are solved, achieving constant output polarity and improved circuit reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SOLNENG SEMICON
- Filing Date
- 2026-05-09
- Publication Date
- 2026-06-05
AI Technical Summary
Existing H-bridge non-polar circuits require additional gate drive circuits or voltage divider circuits to control the switching transistors, resulting in complex circuit structures, high packaging costs, and limited reliability.
By employing a specific connection relationship among four switching transistors and configuring the gate-source withstand voltage to be equivalent to the drain-source withstand voltage, the controlled terminals of the switching transistors can be directly driven by the power supply, simplifying the circuit structure and reducing the number of components and packaging costs.
It achieves constant output polarity without the need for additional protection circuitry, simplifies the circuit structure, reduces packaging costs, and improves circuit integration and reliability.
Smart Images
Figure CN122159673A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic technology, and in particular to a non-polar DC power conversion circuit and module. Background Technology
[0002] In H-bridge non-polarity circuits, in order to achieve constant output polarity when the power input polarity is reversed, it is usually necessary to use additional gate drive circuits or voltage divider circuits to control the conduction and turn-off of the upper bridge arm PMOS transistor and the lower bridge arm NMOS transistor respectively, resulting in complex circuit structure, high packaging cost and limited overall reliability. Summary of the Invention
[0003] This application provides a non-polar DC power conversion circuit and module to simplify the circuit structure of a non-polar H-bridge circuit.
[0004] In a first aspect, embodiments of this application provide a non-polar DC power conversion circuit, including: a first switch, a second switch, a third switch, and a fourth switch, wherein the first switch and the third switch are first type of switch, and the second switch and the fourth switch are second type of switch; The first end of the first switch transistor and the first end of the third switch transistor are connected and serve as the first output terminal; The second terminal of the second switch is connected to the second terminal of the fourth switch and serves as the second output terminal. One of the first output terminal and the second output terminal serves as the power ground. The second terminal of the first switching transistor is connected to the first terminal of the second switching transistor, the controlled terminal of the third switching transistor, and the controlled terminal of the fourth switching transistor, and serves as the first input terminal of the non-polar DC power conversion circuit. The second terminal of the third switch is connected to the first terminal of the fourth switch, the controlled terminal of the first switch, and the controlled terminal of the second switch, respectively, and serves as the second input terminal of the non-polarized DC power conversion circuit. The first input terminal and the second input terminal are used to connect to a drive power supply with interchangeable polarity. The first switch and the third switch are alternately turned on based on the polarity change of the drive power supply, so that the first output terminal continuously outputs the voltage corresponding to the first pole of the drive power supply. The second switch and the fourth switch are alternately turned on based on the polarity change of the drive power supply, so that the second output terminal continuously outputs the voltage corresponding to the second pole of the drive power supply. The first pole and the second pole of the drive power supply are opposite to each other. The absolute value of the difference between the gate-source withstand voltage and the drain-source withstand voltage of any one of the first, second, third, and fourth switching transistors is within a first numerical range, so that any one of the controlled terminals can be directly driven by the driving power supply without additional protection circuitry.
[0005] In some embodiments, the non-polar DC power conversion circuit is configured as follows: When the positive terminal of the driving power supply is connected to the first input terminal and the negative terminal of the driving power supply is connected to the second input terminal, the third switch and the second switch are turned on, and the first switch and the fourth switch are turned off, so that the potential difference between the first output terminal and the first input terminal is within a second numerical range, and the potential difference between the second output terminal and the second input terminal is within a third numerical range. When the positive terminal of the driving power supply is connected to the second input terminal and the negative terminal is connected to the first input terminal, the first switch and the fourth switch are turned on, and the third switch and the second switch are turned off, so that the potential difference between the first output terminal and the second input terminal is within the second numerical range, and the potential difference between the second output terminal and the first input terminal is within the third numerical range.
[0006] In some embodiments, the first type of switch is a PMOS transistor, and the second type of switch is an NMOS transistor; The first terminal of the PMOS transistor is the drain, the second terminal of the PMOS transistor is the source, and the controlled terminal of the PMOS transistor is the gate. The first terminal of the NMOS transistor is the drain, the second terminal of the NMOS transistor is the source, and the controlled terminal of the NMOS transistor is the gate.
[0007] In some embodiments, the first output terminal serves as the positive power supply output terminal, and the second output terminal serves as the ground power supply output terminal.
[0008] In some embodiments, the circuit is integrated into a package, the package including: a first base island, a second base island, and a plurality of pins; The first switch and the second switch are disposed on the first base island, and the third switch and the fourth switch are disposed on the second base island; The first base island is electrically connected to the pin corresponding to the first input terminal, and the second base island is electrically connected to the pin corresponding to the second input terminal.
[0009] In some embodiments, the drains of the first and second switching transistors are fixed to the first base island using conductive adhesive, and the drains of the third and fourth switching transistors are fixed to the second base island using conductive adhesive.
[0010] In some embodiments, the package is a dual-island SOP8 package; The pins corresponding to the first input terminal include PIN5 and PIN6, and the pins corresponding to the second input terminal include PIN7 and PIN8; The pins corresponding to the first output terminal and the second output terminal are selected from PIN1 to PIN4.
[0011] In some embodiments, the pin positions corresponding to the first output terminal and the pin positions corresponding to the second output terminal can be configured to correspond to various wire bonding schemes.
[0012] In some embodiments, the first numerical range is 0-3; the second numerical range is 0-1; and the third numerical range is 0-1.
[0013] Secondly, embodiments of this application provide a non-polar DC power conversion electronic module, comprising: The package includes: a first base island, a second base island, and a plurality of pins; And a non-polar DC power conversion circuit as described in any one of the embodiments of this application, disposed within the package; The first switch and the second switch are disposed on the first base island, and the third switch and the fourth switch are disposed on the second base island. The first base island is electrically connected to the pin corresponding to the first input terminal, and the second base island is electrically connected to the pin corresponding to the second input terminal; The first output terminal and the second output terminal are respectively electrically connected to the corresponding output pins among the plurality of pins.
[0014] This application provides a non-polarized DC power conversion circuit, including: a first switch, a second switch, a third switch, and a fourth switch. The first and third switches are of a first type, and the second and fourth switches are of a second type. The first terminal of the first switch and the first terminal of the third switch are connected and serve as a first output terminal. The second terminals of the second and fourth switches are connected and serve as a second output terminal. One of the first and second output terminals serves as a power ground. The second terminal of the first switch is connected to the first terminal of the second switch, the controlled terminal of the third switch, and the controlled terminal of the fourth switch, respectively, and serves as a first input terminal of the non-polarized DC power conversion circuit. The second terminal of the third switch is connected to the first terminal of the fourth switch, the controlled terminal of the first switch, and the controlled terminal of the second switch, respectively, and serves as a first input terminal of the non-polarized DC power conversion circuit. The second input terminal of the non-polarized DC power conversion circuit, the first input terminal, and the second input terminal are used to connect to a drive power supply with interchangeable polarities. The first and third switching transistors are alternately turned on based on the polarity change of the drive power supply, so that the first output terminal continuously outputs the voltage corresponding to the first pole of the drive power supply. The second and fourth switching transistors are alternately turned on based on the polarity change of the drive power supply, so that the second output terminal continuously outputs the voltage corresponding to the second pole of the drive power supply. The first and second poles of the drive power supply are opposite. Among them, the controlled terminals of the first and third switching transistors need to be inverted. The absolute value of the difference between the gate-source withstand voltage and the drain-source withstand voltage of any one of the first, second, third, and fourth switching transistors is within a first numerical range, so that any controlled terminal can be directly driven by the drive power supply without additional protection circuitry. In the circuit described above, by configuring the gate-source voltage of the four switching transistors to be equivalent to the drain-source voltage, the controlled terminal of each switching transistor can be directly driven by the power supply. When the polarity of the power input is reversed, the output polarity can still be kept constant. Furthermore, no gate drive circuit or voltage divider circuit is required, which simplifies the circuit structure, reduces the number of components and packaging costs, and improves the integration and reliability of the circuit. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 A schematic diagram of a non-polar DC power conversion circuit provided in an embodiment of this application; Figure 2 A schematic diagram of a first packaging wire bonding method provided for an embodiment of this application; Figure 3A schematic diagram of a second packaging wire bonding method provided for embodiments of this application; Figure 4 A schematic diagram of a third packaging wire bonding method provided for embodiments of this application; Figure 5 A schematic diagram of a fourth packaging wire bonding method provided for embodiments of this application; Figure 6 A schematic diagram of the fifth packaging wire bonding method provided for embodiments of this application; Figure 7 This is a schematic diagram of the sixth packaging wire bonding method provided for the embodiments of this application. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described below with reference to the accompanying drawings.
[0018] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.
[0019] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0020] It should be understood that in this application, "at least one (item)" means one or more, "more than" means two or more, "at least two (items)" means two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.
[0021] Please see Figure 1 , Figure 1 This is a schematic diagram of a non-polar DC power conversion circuit provided in an embodiment of this application. Figure 1 As shown, the non-polarized DC power conversion circuit includes: a first switch PM_FO, a second switch NM_FO, a third switch PM_BO, and a fourth switch NM_BO. The first switch PM_FO and the third switch PM_BO are first-type switches (e.g., PMOS transistors), and the second switch NM_FO and the fourth switch NM_BO are second-type switches (e.g., NMOS transistors).
[0022] The first terminal (source) of the first switch PM_FO and the first terminal (source) of the third switch PM_BO are connected to the first node N1, which serves as the first output terminal (VCC, corresponding to pin PIN4).
[0023] The second terminal (source) of the second switch NM_FO and the second terminal (source) of the fourth switch NM_BO are connected to the second node N2. The second node N2 serves as the second output terminal, and one of the first output terminal (VCC) and the second output terminal serves as the power ground (GND, corresponding to pin PIN3).
[0024] The second terminal (drain) of the first switch PM_FO is connected to the first terminal (drain) of the second switch NM_FO, the controlled terminal (gate) of the third switch PM_BO, and the controlled terminal (gate) of the fourth switch NM_BO at the third node N3. The third node N3 serves as the first input terminal (FO, corresponding to pins PIN7 and PIN8) of the non-polar DC power conversion circuit.
[0025] The second terminal (source) of the third switch PM_BO is connected to the first terminal (drain) of the fourth switch NM_BO, the controlled terminal (gate) of the first switch PM_FO, and the controlled terminal (gate) of the second switch NM_FO at a fourth node N4. This fourth node N4 serves as the second input terminal (BO, corresponding to pins PIN5 and PIN6) of a non-polarized DC-DC power conversion circuit. The first input terminal (FO) and the second input terminal (BO) are used to connect to a drive power supply with interchangeable polarity. The first switch PM_FO and the third switch PM_BO are alternately turned on based on the polarity change of the drive power supply, so that the first output terminal (FO) continuously outputs the voltage corresponding to the first terminal of the drive power supply. The second switch PM_BO and the fourth switch NM_BO are alternately turned on based on the polarity change of the drive power supply, so that the second output terminal (BO) continuously outputs the voltage corresponding to the second terminal of the drive power supply. The first and second terminals of the drive power supply are opposite; for example, if the first terminal is positive, then the second terminal is negative.
[0026] In this process, the controlled terminals of the first switch PM_FO and the third switch PM_BO both need to be inverted. The absolute value of the difference between the gate-source withstand voltage and the drain-source withstand voltage of any one of the first switch PM_FO, the second switch NM_FO, the third switch PM_BO, and the fourth switch NM_BO is within a first numerical range (for example, the gate-source withstand voltage is increased to be equivalent to the drain-source withstand voltage, or the difference between the gate-source withstand voltage and the drain-source withstand voltage is less than or equal to a preset threshold). This allows any controlled terminal (gate) to be directly driven by the driving power supply without the need for additional gate driving circuits or level shifting circuits.
[0027] The working principle of the non-polar DC power conversion circuit of this application is as follows: When the positive terminal of the driving power supply is connected to the first input terminal FO and the negative terminal is connected to the second input terminal BO, the gates of the first switch PM_FO and the second switch NM_FO obtain a low potential by connecting to the second input terminal BO. The gates of the third switch PM_BO and the fourth switch NM_BO obtain a high potential by connecting to the first input terminal FO. The gates of the first switch PM_FO and the third switch PM_BO need to be inverted. At this time, the first switch PM_FO is turned on, the second switch NM_FO is turned off, the third switch PM_BO is turned off, and the fourth switch NM_BO is turned on, forming a current path from the first input terminal FO through the second switch NM_FO to the second output terminal GND, then through the external load to the first output terminal VCC, and then through the third switch PM_BO to the second input terminal BO, so that the first output terminal VCC outputs a positive terminal and the second output terminal GND outputs a negative terminal.
[0028] When the positive terminal of the drive power supply is connected to the second input terminal BO and the negative terminal is connected to the first input terminal FO, the gates of the first switch PM_FO and the second switch NM_FO obtain a high potential by connecting to the second input terminal BO. The gates of the third switch PM_FO and the fourth switch NM_FO obtain a low potential by connecting to the first input terminal FO. At this time, the first switch PM_FO is off (PMOS transistor high level off), the second switch NM_FO is on (NMOS transistor high level on), the third switch PM_BO is on (PMOS transistor low level on), and the fourth switch NM_BO is off (NMOS transistor low level off), forming a current path from the second input terminal BO through the third switch PM_BO to the first output terminal VCC, then through the external load to the second output terminal GND, and then through the second switch NM_FO to the first input terminal FO. This also makes the first output terminal VCC output positive and the second output terminal GND output negative. Therefore, regardless of the polarity of the driving power supply connected to the first input terminal FO and the second input terminal BO, this circuit can output a DC power supply with constant polarity at the first output terminal VCC and the second output terminal GND.
[0029] This application provides a non-polarized DC power conversion circuit, including: a first switch, a second switch, a third switch, and a fourth switch. The first and third switches are of a first type, and the second and fourth switches are of a second type. The first terminal of the first switch and the first terminal of the third switch are connected and serve as a first output terminal. The second terminals of the second and fourth switches are connected and serve as a second output terminal. One of the first and second output terminals serves as a power ground. The second terminal of the first switch is connected to the first terminal of the second switch, the controlled terminal of the third switch, and the controlled terminal of the fourth switch, respectively, and serves as a first input terminal of the non-polarized DC power conversion circuit. The second terminal of the third switch is connected to the first terminal of the fourth switch, the controlled terminal of the first switch, and the controlled terminal of the second switch, respectively, and serves as a first input terminal of the non-polarized DC power conversion circuit. The second input terminal of the non-polarized DC power conversion circuit, the first input terminal, and the second input terminal are used to connect to a drive power supply with interchangeable polarities. The first and third switching transistors are alternately turned on based on the polarity change of the drive power supply, so that the first output terminal continuously outputs the voltage corresponding to the first pole of the drive power supply. The second and fourth switching transistors are alternately turned on based on the polarity change of the drive power supply, so that the second output terminal continuously outputs the voltage corresponding to the second pole of the drive power supply. The first and second poles of the drive power supply are opposite. Among them, the controlled terminals of the first and third switching transistors need to be inverted. The absolute value of the difference between the gate-source withstand voltage and the drain-source withstand voltage of any one of the first, second, third, and fourth switching transistors is within a first numerical range, so that any controlled terminal can be directly driven by the drive power supply without additional protection circuitry. In the circuit described above, by configuring the gate-source voltage of the four switching transistors to be equivalent to the drain-source voltage, the controlled terminal of each switching transistor can be directly driven by the power supply. When the polarity of the power input is reversed, the output polarity can still be kept constant. Furthermore, no gate drive circuit or voltage divider circuit is required, which simplifies the circuit structure, reduces the number of components and packaging costs, and improves the integration and reliability of the circuit.
[0030] The non-polar DC power conversion circuit manufactured using the technical solution of this application has the advantages of simple packaging structure, high yield, easy mass production, and multiple wire bonding options to meet the needs of different customers.
[0031] To more clearly illustrate the technical solution of this application, the technical solution of this application will be described below through specific embodiments. It should be noted that the specific embodiments are used to expand the description of the technical solution of this application, and are not intended to limit this application.
[0032] In some embodiments, such as Figure 1As shown, the non-polar DC power conversion circuit is configured such that: when the positive terminal of the driving power supply is connected to the first input terminal FO and the negative terminal of the driving power supply is connected to the second input terminal BO, the first switch PM_FO and the fourth switch NM_BO are turned on, and the third switch PM_BO and the second switch NM_FO are turned off, so that the potential difference between the first output terminal VCC and the first input terminal FO is within a second numerical range (for example, the two potentials are basically the same, and the difference is less than or equal to a preset on-state voltage drop), and the potential difference between the second output terminal GND and the second input terminal BO is within a third numerical range (for example, the two potentials are basically the same, and the difference is less than or equal to a preset on-state voltage drop); when the positive terminal of the driving power supply is connected to the second input terminal BO and the negative terminal is connected to the first input terminal FO, the third switch PM_BO and the second switch NM_FO are turned on, and the first switch PM_FO and the fourth switch NM_BO are turned off, so that the potential difference between the first output terminal VCC and the second input terminal BO is within a second numerical range, and the potential difference between the second output terminal GND and the first input terminal FO is within a third numerical range.
[0033] In one embodiment, the non-polarized DC power conversion circuit is configured such that when the positive terminal of the drive power supply is connected to the first input terminal FO and the negative terminal of the drive power supply is connected to the second input terminal BO, the third switch PM_BO and the second switch NM_FO are turned on, while the first switch PM_FO and the fourth switch NM_BO are turned off. The third switch PM_BO is a first type of switch, namely a PMOS transistor, with its source connected to the first output terminal VCC, its drain connected to the second input terminal BO, and its gate connected to the first input terminal FO. When the third switch PM_BO is turned on, the potential of the first output terminal VCC is pulled up to be approximately equal to the potential of the first input terminal FO, and the potential difference between the two is limited to a second numerical range, such as 0.1 volts, 0.3 volts, or 0.8 volts. The actual value depends on the product of the on-resistance of the third switch PM_BO and the load current flowing through the third switch PM_BO. The second switch, NM_FO, is a type II switch, namely an NMOS transistor. Its drain is connected to the first input terminal FO, its source is connected to the second output terminal GND, and its gate is connected to the second input terminal BO. When the second switch, NM_FO, is turned on, the potential of the second output terminal GND is pulled down to be approximately equal to the potential of the second input terminal BO. The potential difference between the two is limited to a third value range, such as 0.05 volts, 0.2 volts, or 0.6 volts. When the positive terminal of the drive power supply is connected to the second input terminal BO and the negative terminal of the drive power supply is connected to the first input terminal FO, the first switch, PM_FO, and the fourth switch, NM_BO, are turned on, while the third switch, PM_BO, and the second switch, NM_FO, are turned off. The first switching transistor, PM_FO, is a PMOS transistor of the first type. Its source is connected to the first output terminal VCC, its drain is connected to the first input terminal FO, and its gate is connected to the second input terminal BO. When the first switching transistor PM_FO is turned on, the potential of the first output terminal VCC is pulled up to be approximately equal to the potential of the second input terminal BO. The potential difference between the two is also limited to a second numerical range, such as 0.12 volts, 0.35 volts, or 0.75 volts. The fourth switching transistor, NM_BO, is an NMOS transistor of the second type. Its drain is connected to the second input terminal BO, its source is connected to the second output terminal GND, and its gate is connected to the first input terminal FO. When the fourth switching transistor NM_BO is turned on, the potential of the second output terminal GND is pulled down to be approximately equal to the potential of the first input terminal FO. The potential difference between the two is also limited to a third numerical range, such as 0.08 volts, 0.25 volts, or 0.55 volts. The first output terminal VCC serves as the positive power supply output terminal, outputting a potential that is essentially equal to the positive terminal of the drive power supply. The second output terminal GND serves as the ground power supply output terminal, outputting a potential that is essentially equal to the negative terminal of the drive power supply.
[0034] In some embodiments, the first numerical range is 0-3; the second numerical range is 0-1; and the third numerical range is 0-1.
[0035] In one embodiment, the first switch PM_FO, the second switch NM_FO, the third switch PM_BO, and the fourth switch NM_BO in the non-polarized DC power conversion circuit each have a gate-source withstand voltage and a drain-source withstand voltage. The absolute value of the difference between the gate-source withstand voltage and the drain-source withstand voltage of any switch is limited to a first numerical range, which is a closed interval from 0 to 3 volts. For example, the absolute value of the difference can be 0 volts, 1.2 volts, 2.5 volts, or 3.0 volts. By limiting the absolute value of the difference to the range of 0 to 3 volts, it can be ensured that the controlled terminal, i.e., the gate, of each switch can directly receive the drive voltage from the drive power supply without the need for an additional voltage divider circuit or gate driver chip. This is because when the positive or negative terminal of the drive power supply is directly applied to the gate of the corresponding switch, the absolute value of the gate-source voltage will not exceed the gate-source withstand voltage of that switch. Meanwhile, when the drive power supply is connected to the first input terminal FO with the positive terminal and the second input terminal BO with the negative terminal, the potential difference between the first output terminal VCC and the first input terminal FO is limited to a second numerical range, which is a closed interval from 0 to 1 volt. For example, the potential difference can be 0 volt, 0.1 volt, 0.3 volt, 0.6 volt, or 1.0 volt. The potential difference between the second output terminal GND and the second input terminal BO is limited to a third numerical range, which is also a closed interval from 0 to 1 volt. For example, the potential difference can be 0 volt, 0.2 volt, 0.4 volt, 0.7 volt, or 0.9 volt. When the drive power supply is connected with the positive terminal to the second input terminal BO and the negative terminal to the first input terminal FO, the potential difference between the first output terminal VCC and the second input terminal BO is limited to a second numerical range, i.e., 0 to 1 volt. For example, this potential difference can be 0.05 volts, 0.15 volts, 0.35 volts, 0.55 volts, or 0.95 volts. The potential difference between the second output terminal GND and the first input terminal FO is limited to a third numerical range, i.e., 0 to 1 volt. For example, this potential difference can be 0.01 volts, 0.08 volts, 0.22 volts, 0.45 volts, or 0.88 volts. By limiting the first numerical range to 0 to 3, the second numerical range to 0 to 1, and the third numerical range to 0 to 1, the non-polarized DC power conversion circuit can achieve direct drive of the switching transistor gate and low on-state voltage drop transmission between the output terminal and the corresponding input terminal under any input polarity. The first output terminal VCC outputs a potential that is basically equal to the positive terminal of the drive power supply, and the second output terminal GND outputs a potential that is basically equal to the negative terminal of the drive power supply.
[0036] In some embodiments, the first type of switch is a PMOS transistor, and the second type of switch is an NMOS transistor; the first terminal of the PMOS transistor is the source, the second terminal of the PMOS transistor is the drain, and the controlled terminal of the PMOS transistor is the gate. The first terminal of the NMOS transistor is the drain, the second terminal of the NMOS transistor is the source, and the controlled terminal of the NMOS transistor is the gate.
[0037] It should be noted that the first type of switching transistor can also be an NMOS transistor, and the second type of switching transistor can also be a PMOS transistor. Corresponding to the changes in the type of switching transistor, the corresponding circuit structure will also change. For example, the first output terminal is the power ground, and the second output terminal is VCC.
[0038] In some embodiments, the first output terminal VCC serves as the positive power supply output terminal, and the second output terminal GND serves as the ground power supply output terminal.
[0039] Please see Figures 2 to 7 , Figures 2 to 7 This is a schematic diagram of six different packaging wire bonding methods provided in the embodiments of this application. In some embodiments, the circuit is integrated into the package body, which includes: a first base island BO, a second base island FO, and multiple pins PIN1 to PIN8; a third switch PM_BO and a fourth switch NM_BO are disposed on the first base island BO, and the first switch PM_FO and the second switch NM_FO are disposed on the second base island FO; the first base island BO is electrically connected to the pins corresponding to the second input terminal BO, and the second base island FO is electrically connected to the pins corresponding to the first input terminal FO.
[0040] Specifically, the drains of the third switch PM_BO and the fourth switch NM_BO are fixed to the first base island BO using conductive adhesive, and the drains of the first switch PM_FO and the second switch NM_FO are fixed to the second base island FO using conductive adhesive. The source of the first switch PM_FO is connected to the source of the third switch PM_BO via a binding wire, and both are connected to the pin corresponding to the first output terminal VCC; the source of the second switch NM_FO is connected to the source of the fourth switch NM_BO via a binding wire, and both are connected to the pin corresponding to the second output terminal GND. The gates of the first switch PM_FO, the second switch NM_FO, the third switch PM_BO, and the fourth switch NM_BO are all connected to the first base island BO via binding wires.
[0041] In some embodiments, the package is a dual-island SOP8 package; the pins corresponding to the first input terminal FO include PIN5 and PIN6, and the pins corresponding to the second input terminal BO include PIN7 and PIN8; the pins corresponding to the first output terminal VCC and the second output terminal GND are selected from PIN1 to PIN4.
[0042] Specifically, such as Figure 2 As shown, in this wire bonding scheme, the first output terminal VCC corresponds to PIN4, the second output terminal GND corresponds to PIN3, the first base island BO is connected to PIN5 and PIN6, the second base island FO is connected to PIN7 and PIN8, and PIN1 and PIN2 are left floating and not connected. Figure 3 As shown, in another wire bonding scheme, the first output terminal VCC corresponds to PIN3, and the second output terminal GND corresponds to PIN2. For example... Figure 4 As shown, in another wire bonding scheme, the first output terminal VCC corresponds to PIN4, and the second output terminal GND corresponds to PIN2. For example... Figure 5 As shown, in another wire bonding scheme, the first output terminal VCC corresponds to PIN3, and the second output terminal GND corresponds to PIN1. For example... Figure 6 As shown, in another wire bonding scheme, the first output terminal VCC corresponds to PIN4, and the second output terminal GND corresponds to PIN1. Figure 7 As shown, in another wire bonding scheme, the first output terminal VCC corresponds to PIN4, and the second output terminal GND corresponds to PIN3. Figure 2 The solutions are similar, but the wiring path has been adjusted.
[0043] In some embodiments, the pin positions corresponding to the first output terminal VCC and the second output terminal GND can be configured with various wire bonding schemes. For example, GND can be located to the left or right of VCC, and each output terminal can occupy one or two pins to adapt to the application needs of different customers. These diverse wire bonding options reflect the flexibility and adaptability of this application, enabling the non-polar DC power conversion circuit of this application to be compatible with different PCB layout requirements.
[0044] In some embodiments, the first numerical range is configured such that the absolute value of the difference between the gate-source withstand voltage and the drain-source withstand voltage of each switch is less than or equal to a preset threshold. For example, the gate-source withstand voltage is increased to be equivalent to the drain-source withstand voltage, or the difference between the gate-source withstand voltage and the drain-source withstand voltage is within ±10%, or the gate-source withstand voltage is at least 90% of the drain-source withstand voltage. By configuring the gate-source withstand voltage of each switch to be equivalent to the drain-source withstand voltage, the gate of each switch can directly withstand the voltage of the drive power supply without the need for additional gate drive circuits or level shifting circuits, thereby significantly simplifying the circuit structure and reducing manufacturing costs.
[0045] In summary, the non-polarized DC power conversion circuit of this application, through the specific connection relationship of the four switching transistors and the characteristic that the gate-source and drain-source breakdown voltages of each switching transistor are comparable, achieves the technical effect of directly controlling the switching transistors to turn on and off by the drive power supply without the need for an additional drive circuit. Furthermore, by adopting a dual-island SOP8 package and various wire bonding schemes, this application provides a flexible and reliable packaging structure that can meet the application needs of different customers, effectively solving the circuit damage problem caused by reversed power supply polarity, and simplifying the design and manufacturing of system-level circuits.
[0046] This application also provides a non-polar DC power conversion electronic module, including: a package and a non-polar DC power conversion circuit. The package includes: a first base island, a second base island, and multiple pins. The non-polar DC power conversion circuit is any of the non-polar DC power conversion circuits described in any of the embodiments of this application, disposed within the package.
[0047] The first and second switching transistors are disposed on the first base island, and the third and fourth switching transistors are disposed on the second base island.
[0048] The first base island is electrically connected to the pin corresponding to the first input terminal, and the second base island is electrically connected to the pin corresponding to the second input terminal.
[0049] The first output terminal and the second output terminal are respectively electrically connected to the corresponding output pins among the plurality of pins.
[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A non-polar DC power conversion circuit, characterized in that, include: The first switch, the second switch, the third switch, and the fourth switch are of type 1, and the second switch and the fourth switch are of type 2. The first end of the first switch transistor and the first end of the third switch transistor are connected and serve as the first output terminal; The second terminal of the second switch is connected to the second terminal of the fourth switch and serves as the second output terminal. One of the first output terminal and the second output terminal serves as the power ground. The second terminal of the first switching transistor is connected to the first terminal of the second switching transistor, the controlled terminal of the third switching transistor, and the controlled terminal of the fourth switching transistor, and serves as the first input terminal of the non-polar DC power conversion circuit. The second terminal of the third switch is connected to the first terminal of the fourth switch, the controlled terminal of the first switch, and the controlled terminal of the second switch, respectively, and serves as the second input terminal of the non-polarized DC power conversion circuit. The first input terminal and the second input terminal are used to connect to a drive power supply with interchangeable polarity. The first switch and the third switch are alternately turned on based on the polarity change of the drive power supply, so that the first output terminal continuously outputs the voltage corresponding to the first pole of the drive power supply. The second switch and the fourth switch are alternately turned on based on the polarity change of the drive power supply, so that the second output terminal continuously outputs the voltage corresponding to the second pole of the drive power supply. The first pole and the second pole of the drive power supply are opposite to each other. In this process, the controlled terminals of the first and third switching transistors need to be inverted. The absolute value of the difference between the gate-source withstand voltage and the drain-source withstand voltage of any one of the first, second, third, and fourth switching transistors is within a first numerical range, so that any one of the controlled terminals can be directly driven by the driving power supply without additional protection circuitry.
2. The non-polar DC power conversion circuit according to claim 1, characterized in that, The non-polar DC power conversion circuit is configured as follows: When the positive terminal of the driving power supply is connected to the first input terminal and the negative terminal of the driving power supply is connected to the second input terminal, the first switch and the fourth switch are turned on, and the third switch and the second switch are turned off, so that the potential difference between the first output terminal and the first input terminal is within a second numerical range, and the potential difference between the second output terminal and the second input terminal is within a third numerical range. When the positive terminal of the driving power supply is connected to the second input terminal and the negative terminal is connected to the first input terminal, the third switch and the second switch are turned on, and the first switch and the fourth switch are turned off, so that the potential difference between the first output terminal and the second input terminal is within the second numerical range, and the potential difference between the second output terminal and the first input terminal is within the third numerical range.
3. The non-polar DC power conversion circuit according to claim 1, characterized in that, The first type of switch is a PMOS transistor, and the second type of switch is an NMOS transistor; The first terminal of the PMOS transistor is the source, the second terminal of the PMOS transistor is the drain, and the controlled terminal of the PMOS transistor is the gate. The first terminal of the NMOS transistor is the drain, the second terminal of the NMOS transistor is the source, and the controlled terminal of the NMOS transistor is the gate.
4. The non-polar DC power conversion circuit according to claim 3, characterized in that, The first output terminal serves as the positive output terminal of the power supply, and the second output terminal serves as the ground output terminal of the power supply.
5. The non-polar DC power conversion circuit according to claim 1, characterized in that, The circuit is integrated into a package, which includes a first base island, a second base island, and multiple pins. The first switch and the second switch are disposed on the first base island, and the third switch and the fourth switch are disposed on the second base island; The first base island is electrically connected to the pin corresponding to the first input terminal, and the second base island is electrically connected to the pin corresponding to the second input terminal.
6. The non-polar DC power conversion circuit according to claim 5, characterized in that, The drains of the first and second switching transistors are fixed to the first base island using conductive adhesive, and the drains of the third and fourth switching transistors are fixed to the second base island using conductive adhesive.
7. The non-polar DC power conversion circuit according to claim 5, characterized in that, The package is a dual-island SOP8 package; The pins corresponding to the first input terminal include PIN5 and PIN6, and the pins corresponding to the second input terminal include PIN7 and PIN8; The pins corresponding to the first output terminal and the second output terminal are selected from PIN1 to PIN4.
8. The non-polar DC power conversion circuit according to claim 7, characterized in that, Both the pin positions corresponding to the first output terminal and the pin positions corresponding to the second output terminal can be configured to accommodate various wire bonding schemes.
9. The non-polar DC power conversion circuit according to claim 2, characterized in that, The first numerical range is 0-3; the second numerical range is 0-1; and the third numerical range is 0-1.
10. A non-polar DC power conversion electronic module, characterized in that, include: The package includes: a first base island, a second base island, and a plurality of pins; And the non-polar DC power conversion circuit as described in any one of claims 1-9 disposed within the package; The first switch and the second switch are disposed on the first base island, and the third switch and the fourth switch are disposed on the second base island. The first base island is electrically connected to the pin corresponding to the first input terminal, and the second base island is electrically connected to the pin corresponding to the second input terminal; The first output terminal and the second output terminal are respectively electrically connected to the corresponding output pins among the plurality of pins.