CN201985831U - Novel electronic switching circuit with built-in lithium battery of portable power source product - Google Patents
Novel electronic switching circuit with built-in lithium battery of portable power source product Download PDFInfo
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- CN201985831U CN201985831U CN2011200161630U CN201120016163U CN201985831U CN 201985831 U CN201985831 U CN 201985831U CN 2011200161630 U CN2011200161630 U CN 2011200161630U CN 201120016163 U CN201120016163 U CN 201120016163U CN 201985831 U CN201985831 U CN 201985831U
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Abstract
The utility model relates to a novel electronic switching circuit with a built-in lithium battery of a portable power source product, which comprises a power circuit, a boosted circuit, an electronic switch, a trigger circuit, a control circuit, a dynamic current sampling circuit and a branch voltage detection output level circuit. When a power supply plug of a portable device is connected on a power supply socket of the novel electronic switching circuit, the electronic switching circuit can be automatically started and supplies power to a device needing DC 5V to supply power, such as an MP3 (moving picture experts group audio layer-3), an MP4 (mobile Pentium 4), a mobile phone, an iPhone, and the like. When a programmable singlechip MCU (microgrogrammed control unit) in the novel electronic switching circuit detects that a power supplied current is smaller than a minimum power supply current value set by the product, the power supply circuit of the circuit is switched off by the electronic switch in the circuit, or the power supply plug of the portable device is separated from the power supply socket of the novel electronic switching circuit, so that the novel electronic switching circuit can stop supplying power to an output end and is automatically switched to a micro-power consumption state. With the adoption of the novel electronic switching circuit with the built-in lithium battery of the portable power source product, the purposes of low consumption and energy conservation are realized and users are more facilitated.
Description
Technical field
The utility model electronic switching circuit particularly contains the switching circuit of electronic power of the portable power source series products of built-in lithium electricity battery.
Background technology
At present, development along with portable type electronic product, portable power source seems more and more important as the needs of attendant equipment in daily life is used of portable equipment, such as when the user go out, have a power failure or other situation of movement under, can use portable power source to give all kinds of portable equipment power supply or the chargings that need power supply, especially need equipment, such as the power supply of equipment such as MP3, MP4, mobile phone, iPhone with the DC5V power supply.As shown in Figure 2, usually the portable power source of built-in lithium battery adopts mechanical switch or button mode to cut off being connected of lithium battery and output, thereby reaches the very little purpose of the power consumption of this equipment when equipment does not use.But the method need manually be operated, troublesome poeration, close mechanical switch or button if after the user is using up this type of portable power source, forget, battery in this portable power source can because of the continuous firing of inner booster circuit with depleted of energy, make and should repeatedly must charge again and could power for portable equipment for portable equipment provides the portable power source of electric energy.
Summary of the invention
The utility model cuts off the situation that is connected of lithium battery and output for the portable power source that will solve above-mentioned proposition adopts mechanical switch or button mode, and the technical problem that produces proposes a kind of a kind of design of novel electron switching circuit of portable power source series products of built-in lithium battery.When the power supply plug of portable equipment was connected to the power supply base of this novel electron switching circuit, this circuit then can be opened automatically portable equipment is powered.When the programmable single chip computer MCU in this circuit detects the minimum power supply current value that output current sets less than product, then disconnect the power supply circuits of this circuit by the electronic switch in this circuit, or with the power supply plug of portable equipment when the power supply base of this novel electron switching circuit separates, this circuit then can automatically switch to the state of little power consumption.Make the user can under the situation that the energy content of battery has not made, continue repeatedly to use this portable power source to provide electric energy, realized the purpose of low-loss and energy-saving and convenient more the user as the portable equipment of demand power supply.
The technical scheme that the utility model provides is:
A kind of novel electron switching circuit of the portable power source series products of built-in lithium battery, comprise: power circuit, booster circuit, electronic switch, circuits for triggering, control circuit, dynamic current sample circuit and dividing potential drop detect the output level circuit, described dynamic current sample circuit is connected with the sample port of control circuit, described dividing potential drop detects the detection feedback end that the output level circuit is connected booster circuit, and the level signal value of control circuit is connected with the control end of booster circuit, the control end of electronic switch and the control end of circuits for triggering respectively by the control output end mouth.
Described power circuit comprises: built-in 4.2V lithium electricity battery, external direct current power supply channel B AT, accumulation of energy inductance L 2, isolating diode D15 and power supply output channel 5V form, the positive pole of wherein built-in 4.2V lithium electricity battery connects external direct current power supply channel B AT and is communicated with accumulation of energy inductance L 2 inputs, when external direct current power supply when external direct current power supply channel B AT introduces, provide electric energy by external direct current, the external power supply voltage of this moment must be less than 5.3V, accumulation of energy inductance L 2 outputs are connected with the positive pole of isolating diode D15, the negative pole of isolating diode D15 is connected on the power supply output channel 5V passage, accumulation of energy inductance L 2 converts electrical energy into magnetic field energy and stores, accumulation of energy inductance L 2 is converted to electric field energy with the magnetic field energy that stores after the drain electrode of metal-oxide-semiconductor M5 disconnects, and this energy with DC power supply channel B AT on obtain level and smooth direct voltage after the filtering of supply voltage stack back imported and offer load from load connecting interface X1 by isolating diode D15 and electric capacity, because being the magnetic figured stone of 4.2V or input supply voltage and accumulation of energy inductance L 2, this voltage forms after being converted to the stack of electric energy, so output demand voltage+5V is higher than input voltage, the finishing of the process of both having boosted.
Wherein booster circuit comprises: chip U4 boosts, accumulation of energy inductance L 2, isolating diode D15, filter capacitor C31, C32 and metal-oxide-semiconductor M5 form, the chip U4 that boosts contains the power input mouth, output port EXT and detection feedback port FB, wherein output port EXT is connected with the control utmost point G door of metal-oxide-semiconductor M5, the output port EXT of chip U4 of boosting also has the pattern of exporting PWM, the switch of the signal controlling metal-oxide-semiconductor M5 of output PWM, the chip U4 detection feedback of boosting end FB connects the dividing point that described dividing potential drop detects the output level circuit, detect described dividing potential drop and detect the R27 of output level circuit and the level of R26 dividing potential drop output, the drain electrode of metal-oxide-semiconductor M5 connects a bit being connected on the road with the positive pole of described inductance L 2 outputs and isolating diode D15, the negative pole of isolating diode D15 connects capacitor C 31, capacitor C 31 is connected in parallel over the ground with C32, can carry out filtering to output voltage, this tie point is by realizing output voltage+5V is remained on a stable output level to the switch of the drain electrode of metal-oxide-semiconductor M5, and described metal-oxide-semiconductor M5 is the N-channel MOS pipe.
Wherein electronic switch comprises: MOSS manages M6, resistance R 31, R30 and load connecting interface X1 form, the control utmost point of metal-oxide-semiconductor M6 is connected with the resistance R 31 and the R30 of described control circuit output, metal-oxide-semiconductor M6 is the N-channel MOS pipe, the drain electrode of metal-oxide-semiconductor M6 is connected with the negative terminal OUT-port of load connecting interface X1, after the drain-source utmost point conducting of MOSS pipe M6, the negative terminal OUT-port voltage that flows to load connecting interface X1 flows to described sampling resistor RS1 to reference ground by the source electrode that MOSS manages M6, be connected on the anode of load connecting interface X1 and the described power supply output channel 5V passage, constitute current supply circuit.
Wherein circuits for triggering comprise: controllable silicon U7, resistance R 16 and diode D11 form, the triggering pin G of controllable silicon U7 is connected with the negative pole of diode D11 by resistance R 16, the positive pole of diode D11 is connected to the negative terminal OUT-port of described load connecting interface X1, when voltage arrives the OUT-port, trigger controllable silicon U7 conducting by resistance R 16 again through diode D11, this moment, the anode A point voltage of controllable silicon U7 was low level O.
Wherein control circuit comprises: programmable single chip computer MCU, metal-oxide-semiconductor M1, M3, diode D12, triode Q1, Q2, resistance R 17, R18, R22 and R23, described programmable single chip computer MCU contains the control output end mouth C0 that can export high-low level, CT1, CT2 and the AD analog quantity sample port CU more than 8, control output end mouth C0 connects the resistance R 31 in the described electronic switch, when MCU gives high level of port C0, high level signal makes the M6 conducting through resistance R 31, control output end mouth CT2 connects the positive pole of diode D12, the negative pole of diode D12 connects the B utmost point of triode Q1 by resistance R 17, the C utmost point of triode Q1 is connected with the control utmost point of metal-oxide-semiconductor M1, be connected with the anode A end of described controllable silicon U7 simultaneously, when giving lasting high level of port CT2, MCU keeps the M1 conducting, the source electrode of metal-oxide-semiconductor M1 and the resistance R 18 described external direct current power supply channel B AT that is connected in parallel, when MCU gives high level of port CT1, high level signal makes the M3 conducting through resistance R 22, and described metal-oxide-semiconductor M1 and M3 are the P channel MOS tube.
Wherein the dynamic current sample circuit comprises: sampling resistor RS1, capacitor C 24 and resistance R 28, sampling resistor RS1 is connected on the electric power loop, be connected an end of resistance R 28 after capacitor C 24 and the sampling resistor RS1 parallel connection, the other end of resistance R 28 is connected on the sample port CU of described MCU.
Wherein dividing potential drop detection output level circuit comprises: divider resistance R26 and R27, the end of R26 connects the negative pole reference point of external direct current power supply passage, and the end of the R26 other end and R27 constitutes the component voltage pressure point and is connected with the detection feedback end FB of the described chip U4 that boosts.
The control flow of switching circuit, the described MCU of initialization makes output port C0, CT1, CT2 is changed to high level, CT2 makes metal-oxide-semiconductor M1 keep conducting after being changed to high level, to guarantee the continued power of MCU, CT1 is changed to and makes metal-oxide-semiconductor M3 conducting behind the high level, make described U4 start-up control booster circuit that the voltage of 4.2V lithium battery is increased to 5V, C0 is changed to and makes metal-oxide-semiconductor M6 conducting behind the high level, can charge to portable equipment, MCU dynamically reads by described resistance R S1 and reaches the current value of port CU and calculate, judge the limit value of read value of CU as MCU after less than this electronic circuit, MCU makes output port C0, CT1, CT2 is changed to low level, makes discharge loop be cut off charging and finishes.
The function that the utility model is realized is as follows:
A kind of novel electron switching circuit of the portable power source series products of the utility model built-in lithium battery, when the power supply plug of portable equipment was connected to the power supply base of this novel electron switching circuit, this circuit then can be opened automatically portable equipment is powered.Simultaneously the electric current that flow through on to current supply circuit of the programmable single chip computer MCU in this circuit detects, when detecting the current value that supply current sets less than product, the external portable equipment electric weight that satisfied the demands is described, then MCU disconnects the power supply circuits of this circuit by the electronic switch in this circuit.And make the device in the electronic switching circuit be in outage or little power consumption state, if with the power supply plug of portable equipment when the power supply base of this novel electron switching circuit separates, this electronic switching circuit then can automatically switch to the state of little power consumption.Little power consumption electric weight of this electronic switching circuit can be the uA level.Make the user can under the situation that the energy content of battery has not made, can repeatedly continue to use this portable power source, realized the purpose of low-loss and energy-saving and convenient more the user.
Description of drawings
Fig. 1 is a novel electron switching circuit schematic diagram described in the utility model;
Fig. 2 is that the portable power source of common built-in lithium battery adopts mechanical switch or button mode schematic diagram;
Fig. 3 is a novel electron switching circuit described in the utility model, and the switch of the signal controlling metal-oxide-semiconductor M5 of the chip that boosts output PWM is adjusted the waveform schematic diagram of output voltage;
Fig. 4 is a novel electron switching circuit described in the utility model, the equipment effect schematic diagram that contains USB interface of enforcement;
Fig. 5 is the operation logic schematic diagram of novel electron switching circuit described in the utility model;
Embodiment
Explain the utility model in more detail below in conjunction with reference diagram.
See also Fig. 1, a kind of novel electron switching circuit of the portable power source series products of built-in lithium battery, comprise: power circuit, booster circuit, electronic switch, circuits for triggering, control circuit, dynamic current sample circuit and dividing potential drop detect the output level circuit, described dynamic current sample circuit is connected with the sample port of control circuit, described dividing potential drop detects the detection feedback end that the output level circuit is connected booster circuit, the level signal value of control circuit by the control output end mouth respectively with the control end of booster circuit, the control end of electronic switch is connected with the control end of circuits for triggering.
For further facilitate to the description of this novel electron switching circuit, some components and parts in this circuit are given and specific parameter value, and this does not influence the principle of selecting for use other provided as one homogeneous element can realize this patent purpose equally.Seeing also Fig. 1, is 8 programmable single chip computer HT46R53 as the MCU in the control circuit, is responsible for input and processing to circuit; U4 in the booster circuit is the chip S-8355-M20 that boosts, referring to Fig. 3, the output port EXT of this chip has the characteristic of output PWM, the detection feedback end FB of this chip can accept the adjustment that a magnitude of voltage is used for PWM simultaneously, MCU can control this chip and be responsible for exporting a PWM square-wave signal by outbound port EXT, the switch of control M5, and, make output voltage remain on the output of a voltage stabilizing by R27 and R26 dividing potential drop detection output level; M6 is responsible for when not connecing load, cuts off output loop; M3 and M1 use as switch.
When not connecing load, M1 is that closed condition has been cut off external direct current power supply channel B AT, all need elements of Vcc power supply not work in the electronic circuit at this moment, therefore the self discharge of circuit is very little, please refer to Fig. 1, if R27 is 300K, R26 is 39K, electric current connects R27 and R26 formation loop from diode D15 negative pole again through the positive pole of the accumulation of energy inductance L in the power circuit 2 to isolating diode D15, loop current is I=(4.2Vmax-0.7v)/339k=10.32uA, as can be seen this electronic switching circuit from power consumption about 10uA.
See also Fig. 1, after load connecting interface X1 connects load RL, the electric current of built-in 4.2V lithium electricity battery or external direct current power supply flows into from the port of external direct current power supply passage, by the flow through positive pole of isolating diode D15 of accumulation of energy inductance L 2, arrive the anode of load connecting interface X1 again by the negative pole of isolating diode D15, arrive the negative terminal OUT-port of load connecting interface X1 through overload RL, flow to resistance R 16 from the OUT-port through diode D11, trigger controllable silicon U7 by resistance R 16 and make its conducting, this moment, the anode A point voltage of controllable silicon U7 was low level O, M1 is the P channel MOS, M1 conducting this moment, the electric current of built-in 4.2V lithium electricity battery or external direct current power supply from the external direct current power supply passage by M1 to Vcc, Vcc offers the MCU electrifying startup, after MCU starts, sends a high level for port CT2, keep the M1 conducting, guarantee that all elements in the circuit are in running order.This moment, controllable silicon U7 ended because the anode A point voltage of controllable silicon U7 is moved to about 0.3V by Q1.MCU gives CT1 and high voltage of C0 simultaneously, make M3 open-minded, booster circuit work, M6 conducting simultaneously, the voltage that flows to the OUT-port forms the loop by M6 to resistance R S1 to reference signal, MCU detects the electric current that flows through the loop that is obtained by sample port CU simultaneously, and more than the current limit of electric current greater than the product setting as the MCU detection, then MCU keeps each road signal and makes the circuit operate as normal.
Otherwise MCU is by detecting the signal of CU, when current limit that load current is set less than product, MCU is by detecting the signal of CU, stop to export the high level of each port control signal on C0, CU and CT2, this moment, M3 and M6 were disconnected, circuit cuts off the power supply automatically, and the power consumption electric current of built-in lithium battery is reduced to below the 50mA.When delivery outlet load RL disconnects, the power supply plug that is about to portable equipment when the power supply base of this novel electron switching circuit separates, M1, M3, M6 disconnects fully, all circuit are all no longer worked, and reach plug and play, from the little purpose of power consumption.
Explain application of the present utility model in more detail below in conjunction with embodiment preferred.
Please refer to Fig. 4, use a kind of novel electron switching circuit of the portable power source series products of this built-in lithium battery, the portable portable power source of design.USB interface has been adopted in its load connecting interface X1 output, after load RL is connected on this portable power source, novel electron switching circuit on the PCBA is started working, after load RL separates from this portable power source, novel electron switching circuit on the PCBA quits work, its workflow sees also Fig. 5, the Micro USB interface realizes connecting the importing of external direct current power supply, in this portable portable power source, adopted in the novel electron switching circuit of the present invention, also increased and passed through the charge function of the introducing of Micro USB socket the lithium battery of portable power source.。
Be preferred embodiment of the present utility model only below, be not limited to the utility model, for a person skilled in the art, the utility model can have various changes, variation and omission.For example select for use the components and parts of other similar different parameters also to can be the purpose that realizes that the utility model is set forth in the circuit; all within spirit of the present utility model and principle; any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. a kind of novel electron switching circuit of the portable power source series products of built-in lithium battery, comprise: power circuit, booster circuit, electronic switch, circuits for triggering, control circuit, dynamic current sample circuit and dividing potential drop detect the output level circuit, described dynamic current sample circuit is connected with the sample port of control circuit, described dividing potential drop detects the output level circuit and is connected to the boost detection feedback end of chip of booster circuit, the level signal of control circuit by the control output end mouth respectively with the control end of booster circuit, the control end of electronic switch is connected with the control end of circuits for triggering.
2. novel electron switching circuit according to claim 1, it is characterized in that described power circuit comprises: built-in 4.2V lithium electricity battery, external direct current power supply channel B AT, accumulation of energy inductance L 2, isolating diode D15 and power supply output channel 5V form, the positive pole of wherein built-in 4.2V lithium electricity battery connects external direct current power supply channel B AT and is communicated with accumulation of energy inductance L 2 inputs, accumulation of energy inductance L 2 outputs are connected with the positive pole of isolating diode D15, and the negative pole of isolating diode D15 is connected on the power supply output channel 5V passage.
3. novel electron switching circuit according to claim 1, it is characterized in that described booster circuit comprises: chip U4 boosts, accumulation of energy inductance L 2, isolating diode D15, filter capacitor C31, C32 and metal-oxide-semiconductor M5 form, the chip U4 that boosts contains the power input mouth, output port EXT and detection feedback end FB, wherein output port EXT is connected with the control utmost point of metal-oxide-semiconductor M5, detection feedback end FB connects the dividing point that described dividing potential drop detects the output level circuit, the drain electrode of metal-oxide-semiconductor M5 being connected with anodal any that connects on the road of isolating diode D15 with described inductance L 2 outputs, the negative pole of isolating diode D15 connects capacitor C 31, capacitor C 31 is connected in parallel with reference to ground to signal with C32, described output port EXT has the pattern of exporting PWM, and described metal-oxide-semiconductor M5 is the N-channel MOS pipe.
4. novel electron switching circuit according to claim 1, it is characterized in that described electronic switch comprises: metal-oxide-semiconductor M6, resistance R 31, R30 and load connecting interface X1 form, the control utmost point of metal-oxide-semiconductor M6 is connected with the resistance R 31 and the R30 of described control circuit output, the drain electrode of metal-oxide-semiconductor M6 is connected with the negative terminal OUT-of load connecting interface X1, be connected on the anode of load connecting interface X1 and the described power supply output channel 5V passage, described metal-oxide-semiconductor M6 is the N-channel MOS pipe.
5. novel electron switching circuit according to claim 1, it is characterized in that described circuits for triggering comprise: controllable silicon U7, resistance R 16 and diode D11 form, the triggering pin G of controllable silicon U7 is connected with the negative pole of diode D11 by resistance R 16, and the positive pole of diode D11 is connected to the negative terminal OUT-port of described load connecting interface X1.
6. novel electron switching circuit according to claim 1, it is characterized in that described control circuit comprises: programmable single chip computer MCU, metal-oxide-semiconductor M1, M3, diode D12, triode Q1, Q2, resistance R 17, R18, R22 and R23, described programmable single chip computer MCU contains the control output end mouth C0 that can export high-low level, CT1, CT2 and the AD analog quantity sample port CU more than 8, control output end mouth C0 connects the resistance R 31 in the described electronic switch, control output end mouth CT2 connects the positive pole of diode D12, the negative pole of diode D12 connects the B utmost point of triode Q1 by resistance R 17, the C utmost point of triode Q1 is connected with the control utmost point of metal-oxide-semiconductor M1, be connected with the anode A end of described controllable silicon U7 simultaneously, the source electrode of metal-oxide-semiconductor M1 and the resistance R 18 described external direct current power supply channel B AT that is connected in parallel, control output end mouth CT1 is connected to the B utmost point of triode Q2 by resistance R 22, the C utmost point of triode Q2 and the source electrode of metal-oxide-semiconductor M3 are connected to described external direct current power supply channel B AT by resistance R 23, and described metal-oxide-semiconductor M1 and M3 are the P channel MOS tube.
7. novel electron switching circuit according to claim 1, it is characterized in that described dynamic current sample circuit comprises: sampling resistor RS1, capacitor C 24 and resistance R 28, sampling resistor RS1 is connected on the electric power loop, be connected an end of resistance R 28 after capacitor C 24 and the sampling resistor RS1 parallel connection, the other end of resistance R 28 is connected on the sample port CU of described programmable single chip computer MCU.
8. novel electron switching circuit according to claim 1, it is characterized in that described dividing potential drop detects the output level circuit and comprises: divider resistance R26 and R27, the end of R26 connects the negative pole reference point of external direct current power supply passage, and the end of the R26 other end and R27 constitutes dividing point and is connected with the detection feedback end FB of the described chip U4 that boosts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200161630U CN201985831U (en) | 2011-01-19 | 2011-01-19 | Novel electronic switching circuit with built-in lithium battery of portable power source product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200161630U CN201985831U (en) | 2011-01-19 | 2011-01-19 | Novel electronic switching circuit with built-in lithium battery of portable power source product |
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| CN201985831U true CN201985831U (en) | 2011-09-21 |
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| CN2011200161630U Expired - Fee Related CN201985831U (en) | 2011-01-19 | 2011-01-19 | Novel electronic switching circuit with built-in lithium battery of portable power source product |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611420A (en) * | 2011-01-19 | 2012-07-25 | 深圳嘉信高能源技术股份有限公司 | Novel electronic switching circuit of mobile power supply product internally provided with lithium battery |
| CN103023076A (en) * | 2011-09-22 | 2013-04-03 | 比亚迪股份有限公司 | Car charge control device and car |
| CN104283245A (en) * | 2013-07-03 | 2015-01-14 | 深圳市超创鑫科技有限公司 | High-conversion-efficiency mobile power source circuit |
| CN109900957A (en) * | 2019-04-16 | 2019-06-18 | 上海艾为电子技术股份有限公司 | A kind of multiport chip with voltage detecting circuit |
| CN111273593A (en) * | 2020-03-23 | 2020-06-12 | 珠海嘉润医用影像科技有限公司 | Endoscope intelligent control circuit |
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2011
- 2011-01-19 CN CN2011200161630U patent/CN201985831U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611420A (en) * | 2011-01-19 | 2012-07-25 | 深圳嘉信高能源技术股份有限公司 | Novel electronic switching circuit of mobile power supply product internally provided with lithium battery |
| CN102611420B (en) * | 2011-01-19 | 2015-11-25 | 深圳嘉信高能源技术股份有限公司 | A kind of Novel electronic switching circuit of portable power source series products and control flow thereof |
| CN103023076A (en) * | 2011-09-22 | 2013-04-03 | 比亚迪股份有限公司 | Car charge control device and car |
| CN103023076B (en) * | 2011-09-22 | 2015-03-25 | 比亚迪股份有限公司 | Car charge control device and car |
| EP2759035A4 (en) * | 2011-09-22 | 2016-11-23 | Shenzhen Byd Auto R&D Co Ltd | In-vehicle charging control device, vehicle charging system and vehicle |
| CN104283245A (en) * | 2013-07-03 | 2015-01-14 | 深圳市超创鑫科技有限公司 | High-conversion-efficiency mobile power source circuit |
| CN104283245B (en) * | 2013-07-03 | 2017-04-05 | 深圳市超创鑫科技有限公司 | A kind of high conversion efficiency portable power source circuit |
| CN109900957A (en) * | 2019-04-16 | 2019-06-18 | 上海艾为电子技术股份有限公司 | A kind of multiport chip with voltage detecting circuit |
| CN109900957B (en) * | 2019-04-16 | 2021-08-17 | 上海艾为电子技术股份有限公司 | Multi-port chip with voltage detection circuit |
| CN111273593A (en) * | 2020-03-23 | 2020-06-12 | 珠海嘉润医用影像科技有限公司 | Endoscope intelligent control circuit |
| CN111273593B (en) * | 2020-03-23 | 2021-09-21 | 珠海嘉润医用影像科技有限公司 | Endoscope intelligent control circuit |
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