CN204696922U - The DC/DC converter that logic-based Automatic level control exports - Google Patents
The DC/DC converter that logic-based Automatic level control exports Download PDFInfo
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- CN204696922U CN204696922U CN201520334938.7U CN201520334938U CN204696922U CN 204696922 U CN204696922 U CN 204696922U CN 201520334938 U CN201520334938 U CN 201520334938U CN 204696922 U CN204696922 U CN 204696922U
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Abstract
The utility model discloses the DC/DC converter that a kind of logic-based Automatic level control exports, it comprises auxiliary power supply circuit, input filter circuit, circuit for power conversion, PWM circuit, amplifies feedback circuit, exports sample circuit, voltage transitions control circuit; Auxiliary power supply circuit is to PWM circuit supply, and PWM circuit produces the modulation signal of variable duty ratio by saw-toothed wave generator, provides drive singal to the field effect transistor in circuit for power conversion; Input voltage realizes the conversion of DC/AC by high frequency conversion through input filter circuit, circuit for power conversion, then complete DC/DC conversion by rectifying and wave-filtering; Export the dynamic change feeding amplification feedback circuit that sample circuit gathers output voltage, regulate the drive singal of field effect transistor in real time together with PWM circuit, regulated output voltage; Voltage transitions control circuit completes the conversion of multiple signals by logic control input A and logic control input B.Have that volume is little, operating temperature range is wide, high reliability.
Description
Technical field
The utility model relates to air equipment power technique fields, specifically a kind of wide-voltage range, the DC/DC converter that the logic-based Automatic level control exporting multiple voltage exports.
Background technology
No matter conventional DC/DC power module is adopt boost version or step-down form, adopts any one topological mode to realize multiple-channel output.In multiple-output electric power, export how many roads, will corresponding corresponding output port, power module output pin is many, and in real work, slightly carelessness will cause wrong pin.
Along with the extensive use of intelligent chip, occurred the requirement of electrifying timing sequence in a lot of occasion, that is, the multi-group power of control unit requires to export different magnitudes of voltage in different working hours.If multiple-output electric power is applied in Based Intelligent Control occasion electrifying timing sequence being had to requirement, the situation of all the other several roads output no-loads of a road power work will be caused, cause unnecessary loss.And multiple-output electric power volume is large, and power consumption is high, is unfavorable for product Miniaturization Design.
, there is the shortcomings such as module volume is large, operating temperature range is narrow, poor reliability, be difficult to meet the requirement to power supply high reliability in current aerospace field in traditional DC/DC converter many employings printed board (pcb board) and plastic device manufacture.
Utility model content
The purpose of this utility model is to provide a kind of DC/DC converter of logic-based level control voltage exporting change, and to solve, traditional DC/DC converter module output pin is many, volume large, the problem of poor reliability.
For achieving the above object, technical solution adopted in the utility model is:
The DC/DC converter that logic-based Automatic level control exports, it comprises auxiliary power supply circuit, input filter circuit, circuit for power conversion, PWM circuit, amplifies feedback circuit, exports sample circuit, voltage transitions control circuit; Described auxiliary power supply circuit is to PWM circuit supply, and PWM circuit produces the modulation signal of a variable duty ratio by saw-toothed wave generator, provides drive singal to the field effect transistor in circuit for power conversion; Input voltage realizes the conversion of DC/AC by high frequency conversion through input filter circuit, circuit for power conversion, then complete DC/DC conversion by rectifying and wave-filtering; Export the dynamic change that sample circuit gathers output voltage, this change is sent into and amplifies feedback circuit, regulate the drive singal of field effect transistor in real time together with PWM circuit, regulated output voltage; Voltage transitions control circuit completes the conversion of multiple signals by logic control input A and logic control input B.
As further improvement of the utility model, described input filter circuit comprises the first electric capacity, the first inductance, one end of first inductance connects input supply voltage Vin, 1 pin of the other end connection transformer of the first inductance and one end of the first electric capacity, and the other end of the first electric capacity connects GND.
Further improve as of the present utility model, described auxiliary power supply circuit comprises the first resistance, first voltage stabilizing didoe, first triode, second electric capacity, one end of first resistance connects input supply voltage Vin, the other end of the first resistance connects one end of the first voltage stabilizing didoe, the other end of the first voltage stabilizing didoe connects GND, the collector electrode of the first triode connects input supply voltage Vin, base stage connects one end of the first voltage stabilizing didoe, connect one end of the first resistance simultaneously, the emitter of the first triode connects one end of the second electric capacity, and be connected with 7 pin of the first circuit, the second electric capacity other end connects GND.
Further improve as of the present utility model, described PWM circuit comprises the first circuit, second resistance, 3rd resistance, 4th resistance, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, 1 pin of the first circuit connects one end of the second resistance and is connected with 3 pin of second circuit, the other end of the second resistance connects one end of the 3rd electric capacity, the 3rd electric capacity other end connects GND, 2 pin of the first circuit connect GND, 3 pin of the first circuit connect one end of the 3rd resistance and are connected with one end of the 4th electric capacity, the 3rd resistance other end connects the source electrode of field effect transistor, the 4th electric capacity other end connects GND, 4 pin of the first circuit connect one end of the 4th resistance and are connected with one end of the 5th electric capacity, the 4th resistance other end connects the 6th electric capacity and is connected with 8 pin of the first circuit, 5th electric capacity, the other end of the 6th electric capacity all connects GND, 5 pin of the first circuit connect GND, 6 pin of the first circuit are connected with one end of the 5th resistance.
Further improve as of the present utility model, described circuit for power conversion comprises transformer, field effect transistor, 5th resistance, 6th resistance, 7th electric capacity, 8th electric capacity, first diode, 2 pin of transformer connect the drain electrode of field effect transistor and are connected with one end of the 7th electric capacity, the other end of the 7th electric capacity connects GND, 3 pin of transformer connect GND and are connected with one end of the 8th electric capacity, 4 pin of transformer connect one end of the first diode, the first diode other end connects Vout, the grid of field effect transistor connects one end of the 5th resistance, the source electrode of field effect transistor connects one end of the 6th resistance and one end of the 3rd resistance, the other end of the 6th resistance connects GND.
Further improve as of the present utility model, described output sample circuit comprises the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance of connecting successively, one end of 7th resistance connects Vout, the other end is connected with 3 pin of tertiary circuit, the other end of the 8th resistance is connected with the collector electrode of the 3rd triode, the other end of the 9th resistance is connected with the collector electrode of the 5th triode, and the other end of the tenth resistance connects GND.
Further improve as of the present utility model, described amplification feedback circuit comprises second circuit, tertiary circuit, 11 resistance, 12 resistance, 9th electric capacity, 1 pin of second circuit connects one end of the 11 resistance, the other end of the 11 resistance connects Vout, 2 pin of second circuit connect one end of the 12 resistance and are connected with 2 pin of tertiary circuit, the other end of the 12 resistance connects one end of the 9th electric capacity, the other end of the 9th electric capacity is connected with the other end of the 7th resistance, and be connected with 3 pin of tertiary circuit, 3 pin of second circuit connect 1 pin on first road, 4 pin of second circuit connect GND, 1 pin of tertiary circuit connects GND.
Further improve as of the present utility model, described voltage conversion circuit comprises the 4th circuit, 5th circuit, second triode, second triode, second triode, second triode, second diode, 3rd diode, 13 resistance, 14 resistance, 15 resistance, 16 resistance, 17 resistance, 18 resistance, 19 resistance, 20 resistance, voltage conversion circuit logic input part A circuit connection is one end of 1 pin connection the 13 resistance of the 4th circuit, the other end of the 13 resistance connects the emitter of the first triode, 2 pin of the 4th circuit connect the collector electrode of the second triode, the base stage of the second triode connects one end of the 14 resistance, the negative electrode of another termination second diode of the 14 resistance, the anode of the second diode connects logic input A terminal, 3 pin of the 4th circuit connect Vout, 4 pin of the 4th circuit connect one end of the 15 resistance, and be connected with one end of the 16 resistance, the other end of the 15 resistance connects GND, the other end of the 16 resistance connects the base stage of the 3rd triode, the collector electrode of the 3rd triode is connected with one end of the 8th resistance, emitter meets GND, it is identical that voltage conversion circuit logic input part B circuit connection and voltage conversion circuit logic input A.
The utility model is in the process of single-chip microcomputer, DSP and FPGA extensive use, for adapting to the product that intelligentized control method is researched and developed.Output voltage of the present utility model switches under different logical signals controls, to meet the occasion of Based Intelligent Control application.And input voltage is 15V ~ 50V, wide input voltage range, reaches by auxiliary power supply, input filter, power transfer, output rectification, output filtering, PWM, output sampling, amplification feedback and voltage transitions control circuit the object that two lead-out terminals export multiple voltage.
The utility model has the following advantages:
(1) output voltage logic is controlled, and the output voltage values of this product is controlled by two leading-out terminals, by applying low and high level to these two terminals, output voltage is switched between 6V, 11V, 16V;
(2) high-speed analog switch level conversion design, high-speed analog switch level shifting circuit is by triode is applied on off state, by electric resistance partial pressure gather voltage signal, by double switch combination by voltage signal process, the voltage signal of process is delivered to control PWM error amplifier input terminal, thus regulate the duty ratio of high-frequency impulse ripple, obtain required voltage value, high-speed analog switch level shifting circuit achieves the rapid translating of each output voltage;
(3) the utility model circuit adopts thick film hybrid integrated circuit manufacture technics, employing bare chip assembles, the full level Hermetic Package of metal dual-in-line, has that volume is little, operating temperature range is wide (-55 DEG C ~ 125 DEG C), high reliability, and product can be operated in rugged environment.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
The DC/DC converter that a kind of logic-based Automatic level control as shown in Figure 1 and Figure 2 exports, it comprises auxiliary power supply circuit 1, input filter circuit 2, circuit for power conversion 3, PWM circuit 4, amplifies feedback circuit 5, exports sample circuit 6, voltage transitions control circuit 7; Auxiliary power supply circuit 1 powers to PWM circuit 4, and PWM circuit 4 produces the modulation signal of a variable duty ratio by saw-toothed wave generator, provides drive singal to the field effect transistor Q1 in circuit for power conversion 3; Input voltage realizes the conversion of DC/AC by high frequency conversion through input filter circuit 2, circuit for power conversion 3, then complete DC/DC conversion by rectifying and wave-filtering; Export the dynamic change that sample circuit 6 gathers output voltage, this change is sent into and amplifies feedback circuit 5, regulate the drive singal of field effect transistor Q1 in real time together with PWM circuit 4, regulated output voltage; Voltage transitions control circuit 7 completes the conversion of multiple signals by logic control input A and logic control input B.
Input filter circuit 2 comprises the first electric capacity C1, one end of the first inductance L 1, first inductance L 1 connects input supply voltage Vin, 1 pin of the other end connection transformer B of the first inductance L 1 and one end of the first electric capacity C1, and the other end of the first electric capacity C1 connects GND.
Auxiliary power supply circuit 1 comprises the first resistance R1, first voltage stabilizing didoe DZ1, first triode T1, second electric capacity C2, one end of first resistance R1 connects input supply voltage Vin, the other end of the first resistance R1 connects one end of the first voltage stabilizing didoe DZ1, the other end of the first voltage stabilizing didoe DZ1 connects GND, the collector electrode of the first triode T1 connects input supply voltage Vin, base stage connects one end of the first voltage stabilizing didoe DZ1, connect one end of the first resistance R1 simultaneously, the emitter of the first triode T1 connects one end of the second electric capacity C2, and be connected with 7 pin of the first IC circuit 1, the second electric capacity C2 other end connects GND.
PWM circuit 4 comprises the first IC circuit 1, second resistance R2, 3rd resistance R3, 4th resistance R4, 3rd electric capacity C3, 4th electric capacity C4, 5th electric capacity C5, 6th electric capacity C6, 1 pin of the first IC circuit 1 connects one end of the second resistance R2 and is connected with 3 pin of second circuit IC2, the other end of the second resistance R2 connects one end of the 3rd electric capacity C3, the 3rd electric capacity C3 other end connects GND, 2 pin of the first IC circuit 1 connect GND, 3 pin of the first IC circuit 1 connect one end of the 3rd resistance R3 and are connected with one end of the 4th electric capacity C4, the 3rd resistance R3 other end connects the source electrode of field effect transistor Q1, the 4th electric capacity C4 other end connects GND, 4 pin of the first IC circuit 1 connect one end of the 4th resistance R4 and are connected with one end of the 5th electric capacity C5, the 4th resistance R4 other end connects the 6th electric capacity C6 and is connected with 8 pin of the first IC circuit 1, 5th electric capacity C5, the 6th electric capacity C6 other end all connects GND, 5 pin of the first IC circuit 1 connect GND, 6 pin of the first IC circuit 1 are connected with one end of the 5th resistance R5.
Circuit for power conversion 3 comprises transformer B, field effect transistor Q1, 5th resistance R5, 6th resistance R6, 7th electric capacity C7, 8th electric capacity C8, first diode D1, 2 pin of transformer B connect the drain electrode of field effect transistor Q1 and are connected with one end of the 7th electric capacity C7, the other end of the 7th electric capacity C7 connects GND, 3 pin of transformer B connect GND and are connected with one end of the 8th electric capacity C8, 4 pin of transformer B connect one end of the first diode D1, the first diode D1 other end connects Vout, the grid of field effect transistor Q1 connects one end of the 5th resistance R5, the source electrode of field effect transistor Q1 connects one end of the 6th resistance R6 and one end of the 3rd resistance R3, the other end of the 6th resistance R6 connects GND.
Export sample circuit 6 and comprise the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10 that connect successively, one end of 7th resistance R7 connects Vout, the other end is connected with 3 pin of tertiary circuit IC3, the other end of the 8th resistance R8 is connected with the collector electrode of the 3rd triode T3, the other end of the 9th resistance R9 is connected with the collector electrode of the 5th triode T5, and the other end of the tenth resistance R10 connects GND.
Amplify feedback circuit 5 and comprise second circuit IC2, tertiary circuit IC3, 11 resistance R11, 12 resistance R12, 9th electric capacity C9, 1 pin of second circuit IC2 connects one end of the 11 resistance R11, the other end of the 11 resistance R11 connects Vout, 2 pin of second circuit IC2 connect one end of the 12 resistance R12 and are connected with 2 pin of tertiary circuit IC3, the other end of the 12 resistance R12 connects one end of the 9th electric capacity C9, the other end of the 9th electric capacity C9 is connected with the other end of the 7th resistance R7, and be connected with 3 pin of tertiary circuit IC3, 3 pin of second circuit IC2 connect 1 pin of first road IC1, 4 pin of second circuit IC2 connect GND, 1 pin of tertiary circuit IC2 connects GND.
Voltage conversion circuit 7 comprises the 4th IC circuit 4, 5th IC circuit 5, second triode T2, second triode T3, second triode T4, second triode T5, second diode D2, 3rd diode D3, 13 resistance R13, 14 resistance R14, 15 resistance R15, 16 resistance R16, 17 resistance R17, 18 resistance R18, 19 resistance R19, 20 resistance R20, voltage conversion circuit 7 logic input part A circuit connection is one end of 1 pin connection the 13 resistance R13 of the 4th IC circuit 4, the other end of the 13 resistance R13 connects the emitter of the first triode T1,2 pin of the 4th IC circuit 4 connect the collector electrode of the second triode T2, the base stage of the second triode T2 connects one end of the 14 resistance R14, the negative electrode of another termination second diode D2 of the 14 resistance R14, the anode of the second diode D2 connects logic input A terminal, 3 pin of the 4th IC circuit 4 connect Vout, 4 pin of the 4th IC circuit 4 connect one end of the 15 resistance R15, and be connected with one end of the 16 resistance R16, the other end of the 15 resistance R15 connects GND, the other end of the 16 resistance R16 connects the base stage of the 3rd triode T3, the collector electrode of the 3rd triode T3 is connected with one end of the 8th resistance R8, emitter meets GND, it is identical that voltage conversion circuit 7 logic input part B circuit connection and voltage conversion circuit 7 logic input A.
Output voltage of the present utility model switches under different logical signals controls, to meet the occasion of Based Intelligent Control application, input voltage is 15V ~ 50V, wide input voltage range, reaches by auxiliary power supply, input filter, power transfer, output rectification, output filtering, PWM, output sampling, amplification feedback and voltage transitions control circuit the object that two lead-out terminals export multiple voltage.
The utility model circuit adopts thick film hybrid integrated circuit manufacture technics, employing bare chip assembles, the full level Hermetic Package of metal dual-in-line, has that volume is little, operating temperature range is wide (-55 DEG C ~ 125 DEG C), high reliability, and product can be operated in rugged environment.
Claims (8)
1. a DC/DC converter for logic-based Automatic level control output, is characterized in that: it comprises auxiliary power supply circuit (1), input filter circuit (2), circuit for power conversion (3), PWM circuit (4), amplifies feedback circuit (5), exports sample circuit (6), voltage transitions control circuit (7); Described auxiliary power supply circuit (1) is to PWM circuit (4) power supply, and PWM circuit (4) produces the modulation signal of a variable duty ratio by saw-toothed wave generator, provide drive singal to the field effect transistor (Q1) in circuit for power conversion (3); Input voltage realizes the conversion of DC/AC by high frequency conversion through input filter circuit (2), circuit for power conversion (3), then complete DC/DC conversion by rectifying and wave-filtering; Export the dynamic change that sample circuit (6) gathers output voltage, this change is sent into and amplifies feedback circuit (5), regulate the drive singal of field effect transistor (Q1) in real time together with PWM circuit (4), regulated output voltage; Voltage transitions control circuit (7) completes the conversion of multiple signals by logic control input A and logic control input B.
2. the DC/DC converter of logic-based Automatic level control output according to claim 1, it is characterized in that: described input filter circuit (2) comprises the first electric capacity (C1), the first inductance (L1), one end of first inductance (L1) connects input supply voltage Vin, 1 pin of the other end connection transformer (B) of the first inductance (L1) and one end of the first electric capacity (C1), the other end of the first electric capacity (C1) connects GND.
3. the DC/DC converter of logic-based Automatic level control output according to claim 1, it is characterized in that: described auxiliary power supply circuit (1) comprises the first resistance (R1), first voltage stabilizing didoe (DZ1), first triode (T1), second electric capacity (C2), one end of first resistance (R1) connects input supply voltage Vin, the other end of the first resistance (R1) connects one end of the first voltage stabilizing didoe (DZ1), the other end of the first voltage stabilizing didoe (DZ1) connects GND, the collector electrode of the first triode (T1) connects input supply voltage Vin, base stage connects one end of the first voltage stabilizing didoe (DZ1), connect one end of the first resistance (R1) simultaneously, the emitter of the first triode (T1) connects one end of the second electric capacity (C2), and be connected with 7 pin of the first circuit (IC1), second electric capacity (C2) other end connects GND.
4. the DC/DC converter of logic-based Automatic level control output according to claim 1, it is characterized in that: described PWM circuit (4) comprises the first circuit (IC1), second resistance (R2), 3rd resistance (R3), 4th resistance (R4), 3rd electric capacity (C3), 4th electric capacity (C4), 5th electric capacity (C5), 6th electric capacity (C6), 1 pin of the first circuit (IC1) connects one end of the second resistance (R2) and is connected with 3 pin of second circuit (IC2), the other end of the second resistance (R2) connects one end of the 3rd electric capacity (C3), 3rd electric capacity (C3) other end connects GND, 2 pin of the first circuit (IC1) connect GND, 3 pin of the first circuit (IC1) connect one end of the 3rd resistance (R3) and are connected with one end of the 4th electric capacity (C4), 3rd resistance (R3) other end connects the source electrode of field effect transistor (Q1), 4th electric capacity (C4) other end connects GND, 4 pin of the first circuit (IC1) connect one end of the 4th resistance (R4) and are connected with one end of the 5th electric capacity (C5), 4th resistance (R4) other end connects the 6th electric capacity (C6) and is connected with 8 pin of the first circuit (IC1), 5th electric capacity (C5), 6th electric capacity (C6) other end all connects GND, 5 pin of the first circuit (IC1) connect GND, 6 pin of the first circuit (IC1) are connected with one end of the 5th resistance (R5).
5. the DC/DC converter of logic-based Automatic level control output according to claim 1, it is characterized in that: described circuit for power conversion (3) comprises transformer (B), field effect transistor (Q1), 5th resistance (R5), 6th resistance (R6), 7th electric capacity (C7), 8th electric capacity (C8), first diode (D1), 2 pin of transformer (B) connect the drain electrode of field effect transistor (Q1) and are connected with one end of the 7th electric capacity (C7), the other end of the 7th electric capacity (C7) connects GND, 3 pin of transformer (B) connect GND and are connected with one end of the 8th electric capacity (C8), 4 pin of transformer (B) connect one end of the first diode (D1), first diode (D1) other end connects Vout, the grid of field effect transistor (Q1) connects one end of the 5th resistance (R5), the source electrode of field effect transistor (Q1) connects one end of the 6th resistance (R6) and one end of the 3rd resistance (R3), the other end of the 6th resistance (R6) connects GND.
6. the DC/DC converter of logic-based Automatic level control output according to claim 1, it is characterized in that: described output sample circuit (6) comprises the 7th resistance (R7) of connecting successively, 8th resistance (R8), 9th resistance (R9), tenth resistance (R10), one end of 7th resistance (R7) connects Vout, the other end is connected with 3 pin of tertiary circuit (IC3), the other end of the 8th resistance (R8) is connected with the collector electrode of the 3rd triode (T3), the other end of the 9th resistance (R9) is connected with the collector electrode of the 5th triode (T5), the other end of the tenth resistance (R10) connects GND.
7. the DC/DC converter of logic-based Automatic level control output according to claim 1, it is characterized in that: described amplification feedback circuit (5) comprises second circuit (IC2), tertiary circuit (IC3), 11 resistance (R11), 12 resistance (R12), 9th electric capacity (C9), 1 pin of second circuit (IC2) connects one end of the 11 resistance (R11), the other end of the 11 resistance (R11) connects Vout, 2 pin of second circuit (IC2) connect one end of the 12 resistance (R12) and are connected with 2 pin of tertiary circuit (IC3), the other end of the 12 resistance (R12) connects one end of the 9th electric capacity (C9), the other end of the 9th electric capacity (C9) is connected with the other end of the 7th resistance (R7), and be connected with 3 pin of tertiary circuit (IC3), 3 pin of second circuit (IC2) connect 1 pin of first road (IC1), 4 pin of second circuit (IC2) connect GND, 1 pin of tertiary circuit (IC2) connects GND.
8. the DC/DC converter of logic-based Automatic level control output according to claim 1, it is characterized in that: described voltage conversion circuit (7) comprises the 4th circuit (IC4), 5th circuit (IC5), second triode (T2), second triode (T3), second triode (T4), second triode (T5), second diode (D2), 3rd diode (D3), 13 resistance (R13), 14 resistance (R14), 15 resistance (R15), 16 resistance (R16), 17 resistance (R17), 18 resistance (R18), 19 resistance (R19), 20 resistance (R20), voltage conversion circuit (7) logic input part A circuit connection is one end of 1 pin connection the 13 resistance (R13) of the 4th circuit (IC4), the other end of the 13 resistance (R13) connects the emitter of the first triode (T1), 2 pin of the 4th circuit (IC4) connect the collector electrode of the second triode (T2), the base stage of the second triode (T2) connects one end of the 14 resistance (R14), the negative electrode of another termination second diode (D2) of the 14 resistance (R14), the anode of the second diode (D2) connects logic input A terminal, 3 pin of the 4th circuit (IC4) connect Vout, 4 pin of the 4th circuit (IC4) connect one end of the 15 resistance (R15), and be connected with one end of the 16 resistance (R16), the other end of the 15 resistance (R15) connects GND, the other end of the 16 resistance (R16) connects the base stage of the 3rd triode (T3), the collector electrode of the 3rd triode (T3) is connected with one end of the 8th resistance (R8), emitter meets GND, it is identical that voltage conversion circuit (7) logic input part B circuit connection and voltage conversion circuit (7) logic input A.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520334938.7U CN204696922U (en) | 2015-05-22 | 2015-05-22 | The DC/DC converter that logic-based Automatic level control exports |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520334938.7U CN204696922U (en) | 2015-05-22 | 2015-05-22 | The DC/DC converter that logic-based Automatic level control exports |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086780A (en) * | 2017-04-28 | 2017-08-22 | 惠州三华工业有限公司 | A kind of DC DC converting power source circuits of wide scope input and output |
| CN112787642A (en) * | 2020-12-28 | 2021-05-11 | 新乡航空工业(集团)有限公司上海分公司 | Control system of multiplexing switching device |
-
2015
- 2015-05-22 CN CN201520334938.7U patent/CN204696922U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086780A (en) * | 2017-04-28 | 2017-08-22 | 惠州三华工业有限公司 | A kind of DC DC converting power source circuits of wide scope input and output |
| CN107086780B (en) * | 2017-04-28 | 2023-12-05 | 惠州三华工业有限公司 | DC-DC conversion power supply circuit with wide-range input and output |
| CN112787642A (en) * | 2020-12-28 | 2021-05-11 | 新乡航空工业(集团)有限公司上海分公司 | Control system of multiplexing switching device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20200522 |
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| CF01 | Termination of patent right due to non-payment of annual fee |