CN205945119U

CN205945119U - Portable power source with load automatic identification function

Info

Publication number: CN205945119U
Application number: CN201620686306.1U
Authority: CN
Inventors: 赵伟兵; 钟伟金; 肖刚军
Original assignee: Zhuhai Amicro Semiconductor Co Ltd
Current assignee: Zhuhai Amicro Semiconductor Co Ltd
Priority date: 2016-06-30
Filing date: 2016-06-30
Publication date: 2017-02-08
Anticipated expiration: 2026-06-30

Abstract

The utility model provides a portable power source with load automatic identification function, includes battery, resistance, electric capacity, first phase inverter, second phase inverter, delay cell, latch and power module, a resistance termination battery, another termination power module output, the other end of resistance is as power output VBUS and through the capacity ground, an electric capacity termination power module output, other end ground connection, the input termination power module output of first phase inverter, the data terminal of output termination latch, the upset threshold value of second phase inverter is higher than first phase inverter, its input of importing termination power module output, output termination delay cell, the clock terminal of the output termination latch of delay cell, the output termination power module's of latch messenger can hold. The beneficial effects of the utility model are that: circuit structure is simple, and the scheme is with low costs, does not have the quiescent power dissipation, can prolong the duration of battery, and is insensitive to outside ghost effect, electric leakage effect, can not judge the load by accident and insert.

Description

There is the portable power source of automatic recognition of load function

Technical field

This utility model is related to portable power source technical field, particularly to the mobile electricity with automatic recognition of load function Source.

Background technology

Portable power source is a kind of portable charger integrating power supply and charge function, is that one kind can be whenever and wherever possible The portable digital electronic equipment such as mobile phone, panel computer supplements the electronic equipment of power supply.When these electronic equipments are connected by USB When line is connected to portable power source, portable power source needs automatic identification to arrive the access action of load, and opens electric power system, for these electricity Sub- equipment charge.

Traditional portable power source major part function is more single, only has a charge function, automatic detection unit poor compatibility, Conversion efficiency and power consumption are not especially desirable, and defencive function is not also complete, and structure is more complicated, high cost.

With reference to Fig. 1, publication No. is that the Chinese patent application of CN105186598A discloses a kind of USB insertion automatic identification Electric power system, it includes power supply unit and insertion detector unit, and insertion detector unit is by LDO loop, voltage comparator, electric current ratio Relatively and/or logical constitution, its operation principle is as follows：When having peripheral hardware insertion, the capacity effect of peripheral hardware leads to LDO output end vo ut Voltage falling, if the reference voltage Vref of the low over-voltage comparator of Vout, voltage comparator output VM be height, the opposing party Face, the electricresistance effect of peripheral hardware leads to the electric current flowing through M1 to become big, and the electric current of M2 also becomes big simultaneously, if it exceeds current source current I1, then electric current comparative result IM is height, and VM and IM passes through or logic, enables power supply unit, powers to peripheral hardware.

Although above-mentioned patented technology be directed to traditional portable power source deficiency improved automatic detection unit and The shortcoming of capacitive difference, improves the efficiency of electric power system, improves the integrated of chip in the design of whole detecting system inside IC Degree reduces cost.But above-mentioned portable power source yet suffers from following deficiency：This systematic comparison is complicated, LDO loop, voltage comparator There is certain static power consumption with current comparator, be unfavorable for that low-power consumption is applied.

Content of the invention

The purpose of this utility model is, provides a kind of structure simple, does not have one kind of quiescent dissipation to have load automatically The portable power source of identification function.

For achieving the above object, technical scheme provided by the utility model is：

A kind of portable power source with automatic recognition of load function, including battery, resistance, electric capacity, the first phase inverter, second Phase inverter, delay cell, latch and supply module；Resistance one termination battery, another termination supply module outfan, resistance The other end exports VBUS and through capacity earth as power supply；Electric capacity one terminates supply module outfan, and the other end is grounded；First is anti- The input termination supply module outfan of phase device, the data terminal of output termination latch；The turn threshold of the second phase inverter is higher than First phase inverter, its input termination supply module outfan, the input of output termination delay cell；The outfan of delay cell Connect the clock end of latch；The output of latch terminates the Enable Pin of supply module.

As further technical scheme, described portable power source built-in resistor resistance is larger, and the condition of satisfaction is：Various During load insertion, VBUS terminal voltage can be moved to compared with low level, realize insertion detection；When not loading access, Jin Jinshou To under the influence of ectoparasitism effect, the fall that power supply exports VBUS is fainter, and supply module will not open by mistake and open.

The beneficial effects of the utility model are：Circuit structure is simple, and scheme low cost does not have quiescent dissipation, can extend The endurance of battery, insensitive for ectoparasitism effect, leakage effect, load will not be judged by accident and access.

Brief description

A kind of structural representation of portable power source with automatic recognition of load function that Fig. 1 provides for prior art.

The structural representation of the portable power source with automatic recognition of load function that Fig. 2 provides for this utility model embodiment Figure.

When Fig. 3 is for being that load accesses, the signal waveform of each node in Fig. 2.

Fig. 4 is the signal waveform of each node in Fig. 2 under ghost effect effect.

Specific embodiment

By describing technology contents of the present utility model, structural features, the purpose realized and effect in detail, below in conjunction with reality Apply mode and coordinate accompanying drawing to be described in detail.

As shown in Fig. 2 the portable power source with automatic recognition of load function that the present embodiment provides, including battery BAT, electricity Resistance R1, electric capacity C1, the first phase inverter INV1, the second phase inverter INV2, delay cell, latch and supply module.Resistance R1 mono- Termination battery BAT, another termination supply module outfan, the other end of resistance R1 connects as power supply output VBUS and through electric capacity C1 Ground；Electric capacity one terminates supply module outfan, and the other end is grounded；The input termination supply module outfan of the first phase inverter, defeated Go out to terminate the data terminal of latch；The turn threshold of the second phase inverter is higher than the first phase inverter, and its input termination supply module is defeated Go out end, the input of output termination delay cell；The output of delay cell terminates the clock end of latch；The outfan of latch Connect the Enable Pin of supply module.

When not loading R2 and accessing, BAT voltage is moved to by resistance R1 in VBUS end, the first phase inverter INV1 and second anti-phase Device INV2 exports low level, and latch maintains original low level, and supply module is closed.In conjunction with shown in Fig. 3, when When load accesses, the electricresistance effect of load can quickly move a relatively low level of ratio to voltage of VBUS, less than the first phase inverter The turn threshold of INV1, also below the turn threshold of the second phase inverter INV2, thus the output n1 of the first phase inverter INV1 and The output n2 of two phase inverter INV2 can switch to high level from low level, and after one section postpones delta t, n3 is also from low electricity Flat turn is high level, and the high level of n1 is latched by latch, thus outfan n4 also can switch to high level, enables power supply mould Block, voltage of VBUS rises to target voltage, starts powering load.Unequally loaded electricresistance effect has differences, and have is equivalent Resistance ratio is larger, resistance R1 need to get relatively large resistance it is possible to various load insertion when, can VBUS end electricity Pressure is moved to compared with low level, realizes insertion detection.

In conjunction with shown in Fig. 4, because the resistance value ratio of resistance R1 is larger, under conditions of not loading access, in ectoparasitism Under the influence of effect, on circuit board, the dead resistance between VBUS foot and adjacent pin foot diminishes, two pole plates of electric capacity of voltage regulation C1 it Between dead resistance diminish, lead to the decline of VBUS terminal voltage, because the turn threshold of the second phase inverter INV2 is higher, n2 can carry Before be changed into high level, after the delay of delta t, n3 also can be changed into high level, but the decline of voltage of VBUS is very slow, now Also do not drop to the turn threshold of the first phase inverter INV1, therefore n1 maintains low level, what latches were lived is low level, even if VBUS drops under the turn threshold of the first phase inverter INV1, and the output n4 of latch still maintains low level, it is to avoid mistake Open supply module.

Therefore, the portable power source with automatic recognition of load function that the present embodiment provides has the characteristics that：Energy Automatic identification is to the access of load, and can distinguish the electric leakage that ghost effect leads to, accurately the access of load, and scheme is simple, no Quiescent dissipation.

Above-mentioned only the specific embodiment of the utility model is illustrated, but can not be used as protection of the present utility model Scope, the equivalence changes done by every foundation this utility model purport or modification etc., all it is deemed to fall of the present utility model Protection domain.

Claims

1. a kind of portable power source with automatic recognition of load function it is characterised in that：Including battery, resistance, electric capacity, first anti- Phase device, the second phase inverter, delay cell, latch and supply module；Resistance one terminates battery, another termination supply module output End, the other end of resistance exports VBUS and through capacity earth as power supply；Electric capacity one terminates supply module outfan, another termination Ground；The input termination supply module outfan of the first phase inverter, the data terminal of output termination latch；The upset of the second phase inverter Threshold value is higher than the first phase inverter, its input termination supply module outfan, the input of output termination delay cell；Delay cell Output terminate latch clock end；The output of latch terminates the Enable Pin of supply module.

2. the portable power source with automatic recognition of load function according to claim 1 it is characterised in that：Described mobile electricity Source built-in resistor resistance is larger, and the condition of satisfaction is：In various load insertion, VBUS terminal voltage can be moved to relatively low electricity Flat, realize insertion detection；When not loading access, under the influence of being only subject to ectoparasitism effect, power supply exports VBUS's Fall is fainter, and supply module will not open by mistake and open.