CN105471049A - Charging circuit - Google Patents

Charging circuit Download PDF

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Publication number
CN105471049A
CN105471049A CN201610015443.7A CN201610015443A CN105471049A CN 105471049 A CN105471049 A CN 105471049A CN 201610015443 A CN201610015443 A CN 201610015443A CN 105471049 A CN105471049 A CN 105471049A
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CN
China
Prior art keywords
module
semiconductor
oxide
metal
resistance
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Application number
CN201610015443.7A
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Chinese (zh)
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CN105471049B (en
Inventor
贺舒芬
闫辽飞
张少波
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深圳市赛音微电子有限公司
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Priority to CN201610015443.7A priority Critical patent/CN105471049B/en
Publication of CN105471049A publication Critical patent/CN105471049A/en
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention belongs to the technical field of an electronic device, in particular to a charging circuit. In the embodiment of the invention, a control circuit is arranged and used for respectively detecting voltages of a power supply, a rechargeable battery and a voltage conversion module, and thus, the energy of the power supply is utilized to the greatest extent; a control module controls the voltage conversion module to directly charge the rechargeable battery, the charging efficiency is improved, and the electric energy loss during the charging process is also relatively low; and moreover, the voltage conversion module adopts a boost module and a buck module which are connected in parallel, so that the rechargeable battery can be charged when the charging voltage is higher or lower than the highest voltage of the rechargeable battery.

Description

A kind of charging circuit

Technical field

The invention belongs to technical field of electronic equipment, particularly relate to a kind of charging circuit.

Background technology

Existing charging circuit generally has two kinds: voltage-dropping type charging circuit and booster type charging circuit, when the ceiling voltage of charging voltage higher than rechargeable battery, adopt voltage-dropping type charging circuit, when the ceiling voltage of charging voltage lower than rechargeable battery, adopt booster type charging circuit.

In order to ensure output current nonoverload, the electric current that charging circuit is arranged is generally smaller, so it is slow to charge, such charge efficiency is lower.In addition, charge to battery because existing charging circuit cannot maximally utilise power supply energy, therefore in charging process, the loss of electric energy is also higher.

Summary of the invention

The object of the embodiment of the present invention is to provide a kind of charging circuit, is intended to solve existing charging circuit and there is the problem that charge efficiency is low, electric energy loss is high.

The embodiment of the present invention is achieved in that a kind of charging circuit, is connected between power supply and rechargeable battery, and described charging circuit comprises:

Be connected to the voltage transformation module between power supply and rechargeable battery;

Respectively the voltage of described power supply, rechargeable battery, voltage transformation module is detected, to the control module that described voltage transformation module controls, for utilizing the energy of described power supply, controlling described voltage transformation module and directly rechargeable battery being charged;

Described voltage transformation module comprises the boost module be connected between described power supply and rechargeable battery; Or

Described voltage transformation module comprises and is connected in parallel on boost module between described power supply and rechargeable battery and voltage reduction module.

In embodiments of the present invention, respectively the voltage of power supply, rechargeable battery, voltage transformation module is detected by arranging control module, utilize the energy of power supply to greatest extent, control module control voltage modular converter directly charges to rechargeable battery, improve charge efficiency, and the loss of electric energy is also smaller in charging process.

Accompanying drawing explanation

Fig. 1 is the function structure chart of the charging circuit that first embodiment of the invention provides;

Fig. 2 is the function structure chart of the charging circuit that second embodiment of the invention provides;

Fig. 3 is the first circuit structure diagram of the charging circuit that the embodiment of the present invention provides;

Fig. 4 is the second circuit structure diagram of the charging circuit that the embodiment of the present invention provides;

Fig. 5 is the first circuit structure diagram of the first current limliting module that the embodiment of the present invention provides;

Fig. 6 is the second circuit structure diagram of the first current limliting module that the embodiment of the present invention provides;

Fig. 7 is the first circuit structure diagram of the second current limliting module that the embodiment of the present invention provides;

Fig. 8 is the second circuit structure diagram of the second current limliting module that the embodiment of the present invention provides;

Fig. 9 is the first circuit structure diagram of the voltage sample module that the embodiment of the present invention provides;

Figure 10 is the second circuit structure diagram of the voltage sample module that the embodiment of the present invention provides;

Figure 11 is the third circuit structure diagram of the voltage sample module that the embodiment of the present invention provides.

Embodiment

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

Fig. 1 shows the modular structure of the charging circuit that first embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

A kind of charging circuit, be connected between power supply and rechargeable battery, described charging circuit comprises:

Be connected to the voltage transformation module 1 between power supply and rechargeable battery;

Respectively the voltage of described power supply, rechargeable battery, voltage transformation module 1 is detected, to the control module 2 that described voltage transformation module 1 controls, for utilizing the energy of described power supply, controlling described voltage transformation module 1 and directly rechargeable battery being charged;

Described voltage transformation module 1 comprises the boost module 11 be connected between described power supply and rechargeable battery; Or

Described voltage transformation module 1 comprises and is connected in parallel on boost module 11 between described power supply and rechargeable battery and voltage reduction module 12.

Voltage transformation module 1 adopts boost module 11 in parallel and voltage reduction module 12, can realize, when the ceiling voltage of charging voltage higher or lower than rechargeable battery, can both charging to rechargeable battery.

Fig. 3 shows the first circuit structure of the charging circuit that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

As one embodiment of the invention, described charging circuit also comprises anti-reverse discharge diode D1, and described boost module 11 comprises inductance L 1, metal-oxide-semiconductor Q3, diode D3, and described voltage reduction module 12 comprises metal-oxide-semiconductor Q1, inductance L 2, diode D2;

Described inductance L 1 and diode D3 are connected between described power supply and rechargeable battery, and the drain electrode of described metal-oxide-semiconductor Q3 is connected on the public connecting end of described inductance L 1 and diode D3, the source ground of described metal-oxide-semiconductor Q3, and the grid of described metal-oxide-semiconductor Q3 connects described control module 2;

Described anti-reverse discharge diode D1, metal-oxide-semiconductor Q1, inductance L 2 are connected between described power supply and rechargeable battery, the grid of described metal-oxide-semiconductor Q1 connects described control module 2, the negative electrode of described diode D2 connects the public connecting end of described metal-oxide-semiconductor Q1 and inductance L 2, the plus earth of described diode D2.

The object arranging anti-reverse discharge diode D1 is to prevent in the process of charging, occurs that the phenomenon of rechargeable battery back discharge produces.

Fig. 4 shows the second circuit structure of the charging circuit that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

As one embodiment of the invention, described charging circuit also comprises anti-reverse discharge diode D1, described boost module 11 is synchronous boost, described voltage reduction module 12 is synchronous buck, described boost module 11 comprises inductance L 1, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, and described voltage reduction module 12 comprises metal-oxide-semiconductor Q1, inductance L 2, metal-oxide-semiconductor Q2;

Described inductance L 1 and metal-oxide-semiconductor Q4 are connected between described power supply and rechargeable battery, the grid of described metal-oxide-semiconductor Q4 connects described control module 2, the drain electrode of described metal-oxide-semiconductor Q3 connects the public connecting end of described inductance L 1 and metal-oxide-semiconductor Q4, the source ground of described metal-oxide-semiconductor Q3, the grid of described metal-oxide-semiconductor Q3 connects described control module 2;

Described anti-reverse discharge diode D1, metal-oxide-semiconductor Q1, inductance L 2 are connected between described power supply and rechargeable battery, the grid of described metal-oxide-semiconductor Q1 connects described control module 2, the drain electrode of described metal-oxide-semiconductor Q2 connects the public connecting end of described metal-oxide-semiconductor Q1 and inductance L 2, the source ground of described metal-oxide-semiconductor Q2, the grid of described metal-oxide-semiconductor Q2 connects described control module 2.

Fig. 2 shows the modular structure of the charging circuit that second embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

As one embodiment of the invention, described charging circuit also comprises:

Be connected between described voltage transformation module 1 and rechargeable battery, and the first current limliting module 3 be connected with described control module 2.

As one embodiment of the invention, described charging circuit also comprises:

Be connected between described power supply and voltage transformation module 1, and the second current limliting module 4 be connected with described control module 2.

As one embodiment of the invention, described charging circuit also comprises voltage sample module 5, the input of described voltage sample module 5 connects described power supply and/or voltage transformation module 1 and rechargeable battery respectively, and the output of described voltage sample module 5 connects described control module 2 simultaneously.

Fig. 5 shows the first circuit structure of the first current limliting module that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

As one embodiment of the invention, described first current limliting module 3 comprises metal-oxide-semiconductor Q5, and the drain electrode of described metal-oxide-semiconductor Q5 connects described voltage transformation module 1, and the source electrode of described metal-oxide-semiconductor Q5 connects described rechargeable battery, and the grid of described metal-oxide-semiconductor Q5 connects described control module 2.

Fig. 6 shows the second circuit structure of the first current limliting module that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

As one embodiment of the invention, described first current limliting module 3 comprises resistance R2 and comparator A2, described resistance R2 is connected between described voltage transformation module 1 and rechargeable battery, the in-phase input end of described comparator A2 and inverting input connect the two ends of described resistance R2 respectively, control module 2 described in the output termination of described comparator A2.

Fig. 7 shows the first circuit structure of the second current limliting module that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

As one embodiment of the invention, described second current limliting module 4 comprises resistance R1 and comparator A1, described resistance R1 is connected between described power supply and voltage transformation module 1, the in-phase input end of described comparator A1 and inverting input connect the two ends of described resistance R1 respectively, control module 2 described in the output termination of described comparator A1.

Fig. 8 shows the second circuit structure of the second current limliting module that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

As one embodiment of the invention, described second current limliting module 4 comprises resistance R1, resistance R5, resistance R6 and comparator A1, described resistance R1 is connected between described power supply and voltage transformation module 1, one end of described R1 connects the in-phase input end of described comparator A1 and connects described power supply, the other end of described R1 is connected described voltage transformation module 1 and is connected the inverting input of described comparator A1 by described resistance R5, between the inverting input that described resistance R6 is connected to described comparator A1 and output, control module 2 described in the output termination of described comparator A1.

Fig. 9 shows the first circuit structure of the voltage sample module that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

As one embodiment of the invention, described voltage sample module 5 comprises resistance R3, and one end of described resistance R3 is the input of voltage sample module 5, and the other end of described resistance R3 is the output of voltage sample module 5.

Figure 10 shows the second circuit structure of the voltage sample module that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

As one embodiment of the invention, described voltage sample module 5 comprises resistance R3 and resistance R4, one end of described resistance R3 is the input of voltage sample module 5, and the other end of described resistance R3 is the output of voltage sample module 5 and is connected with one end of resistance R4, the other end ground connection of resistance R4.

Figure 11 shows the third circuit structure of the voltage sample module that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.

As one embodiment of the invention, described voltage sample module 5 comprises resistance R3, resistance R4 and metal-oxide-semiconductor Q6, one end of described resistance R3 is the input of voltage sample module 5, the other end of described resistance R3 is the output of voltage sample module 5 and is connected with one end of resistance R4, the other end of described resistance R4 connects the drain electrode of described metal-oxide-semiconductor Q6, the grid of described metal-oxide-semiconductor Q6 connects described control module 2, the source ground of described metal-oxide-semiconductor Q6.

Charging circuit also comprises filter capacitor C1 and filter capacitor C2, one end of filter capacitor C1 is connected between voltage transformation module 1 and the first current limliting module 3, the other end ground connection of filter capacitor C1, one end of filter capacitor C2 is connected between the first current limliting module 3 and rechargeable battery, the other end ground connection of filter capacitor C2.

In embodiments of the present invention, respectively the voltage of power supply, rechargeable battery, voltage transformation module is detected by arranging control module, utilize the energy of power supply to greatest extent, control module control voltage modular converter directly charges to rechargeable battery, improve charge efficiency, and the loss of electric energy is also smaller in charging process.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a charging circuit, is connected between power supply and rechargeable battery, it is characterized in that, described charging circuit comprises:
Be connected to the voltage transformation module between power supply and rechargeable battery;
Respectively the voltage of described power supply, rechargeable battery, voltage transformation module is detected, to the control module that described voltage transformation module controls, for utilizing the energy of described power supply, controlling described voltage transformation module and directly rechargeable battery being charged;
Described voltage transformation module comprises the boost module be connected between described power supply and rechargeable battery; Or
Described voltage transformation module comprises and is connected in parallel on boost module between described power supply and rechargeable battery and voltage reduction module.
2. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises anti-reverse discharge diode D1, and described boost module comprises inductance L 1, metal-oxide-semiconductor Q3, diode D3, and described voltage reduction module comprises metal-oxide-semiconductor Q1, inductance L 2, diode D2;
Described inductance L 1 and diode D3 are connected between described power supply and rechargeable battery, and the drain electrode of described metal-oxide-semiconductor Q3 is connected on the public connecting end of described inductance L 1 and diode D3, the source ground of described metal-oxide-semiconductor Q3, and the grid of described metal-oxide-semiconductor Q3 connects described control module;
Described anti-reverse discharge diode D1, metal-oxide-semiconductor Q1, inductance L 2 are connected between described power supply and rechargeable battery, the grid of described metal-oxide-semiconductor Q1 connects described control module, the negative electrode of described diode D2 connects the public connecting end of described metal-oxide-semiconductor Q1 and inductance L 2, the plus earth of described diode D2.
3. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises anti-reverse discharge diode D1, described boost module is synchronous boost, described voltage reduction module is synchronous buck, described boost module comprises inductance L 1, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, and described voltage reduction module comprises metal-oxide-semiconductor Q1, inductance L 2, metal-oxide-semiconductor Q2;
Described inductance L 1 and metal-oxide-semiconductor Q4 are connected between described power supply and rechargeable battery, the grid of described metal-oxide-semiconductor Q4 connects described control module, the drain electrode of described metal-oxide-semiconductor Q3 connects the public connecting end of described inductance L 1 and metal-oxide-semiconductor Q4, the source ground of described metal-oxide-semiconductor Q3, the grid of described metal-oxide-semiconductor Q3 connects described control module;
Described anti-reverse discharge diode D1, metal-oxide-semiconductor Q1, inductance L 2 are connected between described power supply and rechargeable battery, the grid of described metal-oxide-semiconductor Q1 connects described control module, the drain electrode of described metal-oxide-semiconductor Q2 connects the public connecting end of described metal-oxide-semiconductor Q1 and inductance L 2, the source ground of described metal-oxide-semiconductor Q2, the grid of described metal-oxide-semiconductor Q2 connects described control module.
4. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises:
Be connected between described voltage transformation module and rechargeable battery, and the first current limliting module be connected with described control module, described first current limliting module comprises metal-oxide-semiconductor Q5, the drain electrode of described metal-oxide-semiconductor Q5 connects described voltage transformation module, the source electrode of described metal-oxide-semiconductor Q5 connects described rechargeable battery, and the grid of described metal-oxide-semiconductor Q5 connects described control module.
5. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises: be connected between described voltage transformation module and rechargeable battery, and the first current limliting module be connected with described control module, described first current limliting module comprises resistance R2 and comparator A2, described resistance R2 is connected between described voltage transformation module and rechargeable battery, the in-phase input end of described comparator A2 and inverting input connect the two ends of described resistance R2 respectively, control module described in the output termination of described comparator A2.
6. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises voltage sample module, described voltage sample module comprises resistance R3, one end of described resistance R3 is the input of voltage sample module, the other end of described resistance R3 is the output of voltage sample module, and the input of described voltage sample module connects described power supply and/or voltage transformation module and rechargeable battery respectively, and the output of described voltage sample module connects described control module simultaneously.
7. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises voltage sample module, described voltage sample module comprises resistance R3 and resistance R4, one end of described resistance R3 is the input of voltage sample module, the other end of described resistance R3 is the output of voltage sample module and is connected with one end of resistance R4, the other end ground connection of resistance R4, the input of described voltage sample module connects described power supply and/or voltage transformation module and rechargeable battery respectively, and the output of described voltage sample module connects described control module simultaneously.
8. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises voltage sample module, described voltage sample module comprises resistance R3, resistance R4 and metal-oxide-semiconductor Q6, one end of described resistance R3 is the input of voltage sample module, the other end of described resistance R3 is the output of voltage sample module and is connected with one end of resistance R4, the other end of described resistance R4 connects the drain electrode of described metal-oxide-semiconductor Q6, the grid of described metal-oxide-semiconductor Q6 connects described control module, the source ground of described metal-oxide-semiconductor Q6, the input of described voltage sample module connects described power supply and/or voltage transformation module and rechargeable battery respectively, the output of described voltage sample module connects described control module simultaneously.
9. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises: be connected between described power supply and voltage transformation module, and the second current limliting module be connected with described control module;
Described second current limliting module comprises resistance R1 and comparator A1, described resistance R1 is connected between described power supply and voltage transformation module, the in-phase input end of described comparator A1 and inverting input connect the two ends of described resistance R1 respectively, control module described in the output termination of described comparator A1.
10. charging circuit as claimed in claim 1, it is characterized in that, described charging circuit also comprises: be connected between described power supply and voltage transformation module, and the second current limliting module be connected with described control module;
Described second current limliting module comprises resistance R1, resistance R5, resistance R6 and comparator A1, described resistance R1 is connected between described power supply and voltage transformation module, one end of described R1 connects the in-phase input end of described comparator A1 and connects described power supply, the other end of described R1 is connected described voltage transformation module and is connected the inverting input of described comparator A1 by described resistance R5, between the inverting input that described resistance R6 is connected to described comparator A1 and output, control module described in the output termination of described comparator A1.
CN201610015443.7A 2016-01-08 2016-01-08 A kind of charging circuit CN105471049B (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN105676934A (en) * 2016-04-13 2016-06-15 深圳市赛音电子有限公司 Power circuit
CN106410897A (en) * 2016-10-12 2017-02-15 常州市派腾电子技术服务有限公司 Electronic cigarette and power supply structure thereof
CN107612118A (en) * 2017-10-20 2018-01-19 天津瑞发科半导体技术有限公司 A kind of electric power controller and management method

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CN103051042A (en) * 2012-07-13 2013-04-17 山大鲁能信息科技有限公司 Direct current uninterruptible power supply
CN104253469A (en) * 2014-09-24 2014-12-31 于志章 Secondary battery pack charging and discharging management system
US20150069956A1 (en) * 2013-09-09 2015-03-12 Apple Inc. Universal power adapter

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CN101247053A (en) * 2008-01-22 2008-08-20 艾默生网络能源有限公司 Battery-connected voltage-boosting and reducing converting circuit and device, DC back-up power device
CN201450084U (en) * 2009-01-08 2010-05-05 张�雄 Usb multifunctional battery
CN102629825A (en) * 2012-04-26 2012-08-08 厦门理挚半导体科技有限公司 Circuit structure of realizing synchronous buck-type charging and boost-type power supply by using single inductor
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CN105676934A (en) * 2016-04-13 2016-06-15 深圳市赛音电子有限公司 Power circuit
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CN107612118A (en) * 2017-10-20 2018-01-19 天津瑞发科半导体技术有限公司 A kind of electric power controller and management method
CN107612118B (en) * 2017-10-20 2019-01-04 天津瑞发科半导体技术有限公司 A kind of electric power controller and management method

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