CN210380302U - High-reliability airborne portable USB charging module - Google Patents
High-reliability airborne portable USB charging module Download PDFInfo
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- CN210380302U CN210380302U CN201921368520.2U CN201921368520U CN210380302U CN 210380302 U CN210380302 U CN 210380302U CN 201921368520 U CN201921368520 U CN 201921368520U CN 210380302 U CN210380302 U CN 210380302U
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Abstract
The utility model relates to a portable USB module of charging of high reliability machine-carried, this USB module of charging comprises USB step-down module and USB socket, USB step-down module includes multichannel USB current-limiting switch, in this embodiment, sets up to two the tunnel, and step-down stabiliser DC/DC is connected to the aviation power end through the one end of multichannel USB current-limiting switch, and in the application environment of this embodiment, the aviation power end provides DC28V power to acquire the voltage output after the aviation power end step-down steady voltage, the corresponding USB socket is connected respectively to the other end, forms the output of the multichannel USB mouth of different electric currents. The utility model discloses provide 5V 2.1A respectively, 5V 1A charge port, can provide the port of charging for any consumer product that needs the USB interface, including most of cell-phones, panel computer and GPS equipment to it is small and exquisite, economy, easily install, can install cockpit and inside cabin.
Description
Technical Field
The utility model relates to an airborne multimedia equipment technical field, concretely relates to portable USB of high reliability airborne module of charging.
Background
At present, a plurality of mature USB chargers are available in the market, the common USB charger is developed from the previous 5W to the present near-hundred watt quick charging, the high-voltage quick charging and the low-voltage quick charging are mutually compared, various quick charging protocols such as QC, FCP, SCP, MTK PE, AFC, USB PD and the like are arranged in a whole, and the USB charger is widely applied to portable electronic equipment (mobile phones, tablet computers and the like).
Problem disadvantages: 1) the common USB charger can only work under the commercial power AC 86-260V/50-60 HZ, and cannot work in the onboard DC28V power supply environment; 2) the treasured that charges is forbidden to take the aircraft owing to there is the safety regulation problem, and passenger and flight attendant can't charge for portable electronic equipment at the aircraft, gives passenger and flight attendant trip and brings very big inconvenience, the urgent need of solving.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the problem that prior art exists, provide a portable USB module of charging is carried to high reliability machine.
For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:
the utility model provides a portable USB module of charging of high reliability machine-carried, this USB module of charging comprises USB step-down module and USB socket, USB step-down module includes multichannel USB current-limiting switch, and step-down stabiliser DC/DC is passed through to multichannel USB current-limiting switch's one end is connected to the aviation power end to acquire the voltage output after the aviation power end step-down steady voltage, the USB socket that corresponds is connected respectively to the other end, forms the multichannel USB mouth output of different electric currents.
Further, the step-down voltage stabilizer DC/DC adopts an integrated high-side MOSFET step-down voltage stabilizer chip, the VIN end and the EN end of the integrated high-side MOSFET step-down voltage stabilizer chip are connected to an aviation power supply end and simultaneously connected with the aviation power supply end through a capacitor CINGrounded, the RT/SYNC end passes through a resistor RTGrounded, the SS terminal passes through a capacitor CSSGrounded, the BOOT terminal passes through a capacitor CBOOTThe SW terminal is connected to the output terminal V via the inductor LOUTAnd the SW terminal is connected with the ground in a reverse phase manner through a diode D, an inductor L and an output terminal VOUTRespectively pass through a capacitor COUTGround and series resistor RFBTAnd a resistance RFBBGround, resistance RFBTAnd a resistance RFBBThe common connecting end between the two is connected to the FB end of the integrated high-side MOSFET step-down voltage regulator chip.
Furthermore, the USB current-limiting switch adopts a TPS2511 current-limiting switch chip and is used for respectively limiting the current of the DC/DC output end of the step-down voltage stabilizer to form a plurality of paths of different current outputs.
Further, a TVS protection circuit is arranged between the DC/DC of the step-down voltage stabilizer and the aviation power supply end, the TVS protection circuit comprises a fuse, a TVS tube and an anti-reverse diode, one end of the fuse is connected to the positive phase end DC + of the aviation power supply end, the other end of the fuse is connected with one end of the anti-reverse diode, the other end of the anti-reverse diode is a positive phase output end VO +, one end of the TVS tube is connected to the negative phase end DC-of the aviation power supply end, the other end of the TVS tube is connected to the other end of the fuse, and the negative phase end DC-of the aviation power supply end is used as a negative phase output end VO.
Furthermore, a filter circuit is arranged between the DC/DC of the step-down voltage stabilizer and an aviation power supply end, the filter circuit comprises a safety regulation capacitor, a common mode inductor, a special filter and a pi filter which are sequentially connected, two ends of the safety regulation capacitor are respectively connected with a positive phase output end VO + and a negative phase output end VO-of the aviation power supply end, the pi filter is formed by sequentially connecting an inductor and two capacitors, two ends of a first capacitor are used as input ends, two ends of a second capacitor are used as output ends, one end of the second capacitor used as the output end is a high-level end, the other end of the second capacitor is connected with an input ground end, and the input ground end is isolated from a system ground section.
Further, the other end of the USB current limiting switch is further connected to a charging indication circuit, the charging indication circuit includes an input end USB _ VBUSA, the input end USB _ VBUSA is connected to a collector of a transistor Q10, an emitter of a transistor Q10 is connected to an anode of a light emitting diode LED2, a cathode of the light emitting diode LED2 is grounded through a resistor R28, a base of the transistor Q10 is connected to a collector of a transistor Q10 through a resistor R26 and a resistor R27 in sequence, a common connection end between the resistor R26 and the resistor R27 is connected to an anode of a light emitting diode LED6, a cathode of the light emitting diode LED6 is grounded through a resistor R60, and a common connection end between the resistor R26 and the resistor R27 is grounded through a capacitor C20, a capacitor C21, a capacitor C22 and a capacitor C54 which are connected in parallel.
Further, the USB socket adopts a USB3.0 type A interface.
The utility model has the advantages that:
the utility model discloses it is succinct, modular structure, be convenient for production and equipment, it can charge for the miniwatt mobile device to provide two way interface USB5V/1A that charges, USB5V 2.1A can charge for high-power mobile device, USB cable compensation function has, can charge for removing portable device by nimble high efficiency, powerful reliable excessive pressure has, overflow, the excess temperature, surge self-protection satisfies Do-160G, Do-313, CCAR25.853 aviation authentication, every USB mouth corresponds this USB mouth charged state of LED accurate demonstration, can install fast and dismantle, facilitate the use and maintain, can install at the seat, the panel, insert under-deck DC28V power in the cabin, charge for portable device.
Drawings
Fig. 1 is a schematic block diagram of the USB charging module of the present invention;
FIG. 2 is a schematic diagram of the DC/DC circuit of the voltage step-down regulator of the present invention;
FIG. 3 is a schematic diagram of a USB current-limiting switch circuit according to the present invention;
fig. 4 is a schematic diagram of a TVS protection circuit of the present invention;
fig. 5 is a schematic diagram of a filter circuit according to the present invention;
fig. 6 is a schematic diagram of a charging indication circuit according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, a high-reliability onboard portable USB charging module, which is composed of a USB voltage-reducing module and a USB socket, where the USB voltage-reducing module includes multiple USB current-limiting switches, and in this embodiment, the USB current-limiting switches are arranged in two ways, one end of each of the multiple USB current-limiting switches is connected to an aviation power supply end through a voltage-reducing regulator DC/DC, and in an application environment of this embodiment, the aviation power supply end provides a DC28V power supply to obtain voltage output after voltage reduction and voltage stabilization from the aviation power supply end, and the other end of each of the multiple USB socket is connected to corresponding USB sockets respectively to form multiple USB port outputs of different currents, and this embodiment aims to change the aviation power supply end of DC28V into 5V/2.1A and.
As shown in fig. 2, the step-down regulator DC/DC adopts an integrated high-side MOSFET step-down regulator chip, the specific model is 40V, 3.5A, has a wide input voltage range of 4V to 40V, can provide a DC28V power supply for an aviation power supply terminal, the VIN terminal and the EN terminal of the integrated high-side MOSFET step-down regulator chip are connected to the aviation power supply terminal of DC28V, and simultaneously, the VIN terminal and the EN terminal of the integrated high-side MOSFET step-down regulator chip are connected to the aviation power supply terminal of DCINGrounded, the RT/SYNC end passes through a resistor RTGrounded, the SS terminal passes through a capacitor CSSGrounded, the BOOT terminal passes through a capacitor CBOOTThe SW terminal is connected to the output terminal V via the inductor LOUTIn this embodiment, the output is +5V, the SW terminal is grounded in reverse phase through the diode D, the inductor L and the output terminal VOUTRespectively pass through a capacitor COUTGround and series resistor RFBTAnd a resistance RFBBGround, resistance RFBTAnd a resistance RFBBThe common connecting end between the two is connected to the FB end of the integrated high-side MOSFET step-down voltage regulator chip.
As shown in fig. 3, the USB current-limiting switch adopts a TPS2511 current-limiting switch chip, is compatible with a USB 2.0 and USB3.0 power switches, and is configured to respectively perform current limitation on currents at the DC/DC output terminal of the step-down voltage regulator to form multiple different current outputs, where in this embodiment, the current limitation on the DC/DC output of the step-down voltage regulator is 2.1A and 1A, and the currents are output to the USB socket at 5V/2.1A and 5V/1A.
As shown in fig. 4, a TVS protection circuit is provided between the DC/DC of the step-down voltage regulator and the aviation power supply terminal, the TVS protection circuit comprises a fuse, a TVS tube and an anti-reverse diode, one end of the fuse is connected to the positive phase end DC + of the aviation power supply end, the other end of the fuse is connected to one end of the anti-reverse diode, the other end of the anti-reflection diode is a positive phase output end VO +, one end of the TVS tube is connected to a negative phase end DC-of the aviation power supply end, the other end of the TVS tube is connected to the other end of the fuse, and the negative phase end DC-of the aviation power supply end is used as a negative phase output end VO-, the safety operation of the circuit is protected by fusing the fuse to cut off the current, the reverse connection of the power supply is prevented by the reverse prevention diode, and the TVS tube absorbs a transient large current to clamp the voltage at two ends of the TVS tube at a preset value, so that the following circuit elements are protected from the impact of transient high-voltage spike pulses.
As shown in fig. 5, a filter circuit is arranged between the DC/DC of the step-down voltage regulator and the aviation power supply terminal, the filter circuit comprises an ampere rule capacitor, a common mode inductor, a special filter and a pi filter which are connected in sequence, in this embodiment, the special filter is a general aviation special filter, and is used for filtering 10MHZ high frequency harmonics, filtering 50KZ low frequency radiation, two ends of the safety capacitor are respectively connected with a positive phase output end VO + and a negative phase output end VO-of an aviation power supply end, the pi filter is formed by sequentially connecting an inductor and two capacitors, the two ends of the first capacitor are used as input ends, the two ends of the second capacitor are used as output ends, one end of the second capacitor used as an output end is a high-level end, the other end of the second capacitor used as an output end is connected with an input ground end, and the input ground end is isolated from a system ground section and used for filtering common mode interference and differential mode interference.
As shown in fig. 6, the other end of the USB current limiting switch is further connected to a charging indicating circuit, the charging indicating circuit includes an input terminal USB _ VBUSA, the input terminal USB _ VBUSA is connected to a collector of a transistor Q10, an emitter of a transistor Q10 is connected to an anode of a light emitting diode LED2, a cathode of the light emitting diode LED2 is grounded through a resistor R28, a base of the transistor Q10 is connected to a collector of a transistor Q10 through a resistor R26 and a resistor R27 in sequence, a common connection end between the resistor R26 and the resistor R27 is connected to an anode of a light emitting diode LED6, a cathode of the light emitting diode LED6 is grounded through a resistor R60, and a common connection end between the resistor R26 and the resistor R27 is grounded through a capacitor C20, a capacitor C21, a capacitor C22, and a capacitor C54 which are connected in parallel, in this embodiment, when 28V is connected to the USB charging module, the system normally operates to generate 5V voltage, and, the LED emits green light, which indicates that the power module works normally, and if the LED does not emit light, the possible reasons are as follows:
1) the onboard power supply 28V is not connected or the onboard 28V power supply is abnormal in output;
2) the PED power module is damaged;
the charging indication is a blue LED, one yellow LED displays different colors according to the light composite principle, two LEDs are simultaneously lightened and synthesized to be blue at the green USB port during charging, yellow is not lightened when the USB port is full and not charged, and blue is displayed at the blue lightening USB port.
The USB socket adopts a USB3.0 type A interface, and in addition, in the embodiment, an ESD protection device is further arranged at the USB socket to protect the USB charging module from being damaged by static electricity and also protect the charging equipment from being interfered and damaged by ESD.
The principle of the utility model
The utility model discloses the DC28V power that the well aviation power supply end provided falls into two tunnel through USB current-limiting switch again through step-down stabiliser DC/DC conversion DC 5 V3.5A: the one-way DC 5V/2.1A charges the high-power portable electronic equipment or supports the quick-charging electronic equipment, the one-way DC 5V/1A charges the low-power portable electronic equipment, the USB3.0 type A interface is compatible with charging wire input ends of all portable equipment on the market, the plugging and unplugging times can reach more than 5 ten thousand times of plugging and unplugging times of a common charger in a supermarket far beyond the market, and corresponding LED lamps are arranged near two USB sockets to display the charging state of the USB sockets more obviously.
In addition, it should be noted that the terms "first", "second", and the like in the specification are used for distinguishing various components, elements, steps, and the like in the specification, and are not used for representing a logical relationship or a sequential relationship between the various components, elements, steps, and the like, unless otherwise specified or indicated.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a portable USB module of charging of high reliability machine-carried, its characterized in that, this USB module of charging comprises USB step-down module and USB socket, USB step-down module includes multichannel USB current-limiting switch, and multichannel USB current-limiting switch's one end is passed through step-down stabiliser DC/DC and is connected to the aviation power end to obtain the voltage output after the aviation power end step-down steady voltage, the other end connects corresponding USB socket respectively, forms the multichannel USB mouth output of different electric currents.
2. The high reliability on-board portable USB charging module of claim 1, wherein the buck regulator DC/DC employs an integrated high side MOSFET buck regulator chip, the VIN and EN terminals of which are connected to the aviation power supply terminals while passing through a capacitor CINGrounded, the RT/SYNC end passes through a resistor RTGrounded, the SS terminal passes through a capacitor CSSGrounded, the BOOT terminal passes through a capacitor CBOOTThe SW terminal is connected to the output terminal V via the inductor LOUTAnd the SW terminal is connected with the ground in a reverse phase manner through a diode D, an inductor L and an output terminal VOUTRespectively pass through a capacitor COUTGround and series resistor RFBTAnd a resistance RFBBGround, resistance RFBTAnd a resistance RFBBThe common connecting end between the two is connected to the FB end of the integrated high-side MOSFET step-down voltage regulator chip.
3. The high-reliability onboard portable USB charging module according to claim 1, wherein the USB current-limiting switch uses a TPS2511 current-limiting switch chip for respectively current-limiting the current at the DC/DC output terminal of the step-down voltage regulator to form multiple different current outputs.
4. The high-reliability airborne portable USB charging module according to claim 1, wherein a TVS protection circuit is provided between the step-down voltage regulator DC/DC and the aviation power supply terminal, the TVS protection circuit includes a fuse, a TVS tube, and an anti-reverse diode, one end of the fuse is connected to the positive phase terminal DC + of the aviation power supply terminal, the other end of the fuse is connected to one end of the anti-reverse diode, the other end of the anti-reverse diode is a positive phase output terminal VO +, one end of the TVS tube is connected to the negative phase terminal DC-of the aviation power supply terminal, the other end of the TVS tube is connected to the other end of the fuse, and the negative phase terminal DC-of the aviation power supply terminal is used as a negative phase output terminal VO-.
5. The high-reliability onboard portable USB charging module according to claim 1 or 4, wherein a filter circuit is disposed between the DC/DC of the step-down voltage stabilizer and the aviation power supply terminal, the filter circuit includes a safety capacitor, a common-mode inductor, a special filter and a pi filter which are connected in sequence, two ends of the safety capacitor are respectively connected with a positive phase output VO + and a negative phase output VO-of the aviation power supply terminal, the pi filter is composed of an inductor and two capacitors which are connected in sequence, two ends of the first capacitor are used as input ends, two ends of the second capacitor are used as output ends, one end of the second capacitor which is used as an output end is connected with a high-level end, the other end of the second capacitor is connected with an input ground, and the input ground is isolated from the system.
6. The high-reliability onboard portable USB charging module according to claim 1, wherein a charging indication circuit is further connected to the other end of the USB current-limiting switch, the charging indication circuit includes an input terminal USB _ VBUSA, the input terminal USB _ VBUSA is connected to a collector of a transistor Q10, an emitter of a transistor Q10 is connected to a positive terminal of a light emitting diode LED2, a negative terminal of the light emitting diode LED2 is grounded through a resistor R28, a base of the transistor Q10 is connected to a collector of a transistor Q10 through a resistor R26 and a resistor R27 in sequence, a common connection end between a resistor R26 and a resistor R27 is connected to a positive terminal of a light emitting diode LED6, a negative terminal of a light emitting diode LED6 is grounded through a resistor R60, and a common connection end between a resistor R26 and a resistor R27 is grounded through a capacitor C20, a capacitor C21, a capacitor C22 and a capacitor C54 which are.
7. The high reliability on-board portable USB charging module of claim 1 wherein the USB receptacle employs a USB3.0 type a interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921368520.2U CN210380302U (en) | 2019-08-22 | 2019-08-22 | High-reliability airborne portable USB charging module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921368520.2U CN210380302U (en) | 2019-08-22 | 2019-08-22 | High-reliability airborne portable USB charging module |
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| CN210380302U true CN210380302U (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110535203A (en) * | 2019-08-22 | 2019-12-03 | 苏州科可瑞尔航空技术有限公司 | A kind of airborne portable USB charging module of high reliability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110535203A (en) * | 2019-08-22 | 2019-12-03 | 苏州科可瑞尔航空技术有限公司 | A kind of airborne portable USB charging module of high reliability |
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