JPH11341688A - Charger, component for charging, and adaptor for charger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charger, components for charging, and an adaptor for the charger, which are less expensive and small-size viewed from a comprehensive standpoint including the performance for DC charging and that for AC charging. SOLUTION: This is an integral charger for common use for AC and DC which is constituted of a car plug 11, a DC input section 10 having a primary side protective circuit 12, an AC blade 21, an AC input section 20 having a primary side protective rectifier circuit 22, a step-down circuit 31, a charge controlling circuit 32, an output protective circuit 33, a cord 34, and a section for common use for AC and DC having a charging plug 35. By using part of the charger for both DC charging and AC charging, the charger can be totally made less-expensive and small-size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charger for charging a secondary battery used in a portable telephone or the like, a charging component, and a charger adapter.

[0002]

2. Description of the Related Art A portable telephone uses a rechargeable secondary battery as a power source. As a charger for the secondary battery, an AC charger that receives AC 100 V from an outlet and outputs a DC voltage for charging the battery, and a DC 12 V / 24 V from a cigarette lighter socket of a car as an input, for charging the battery. There are two types of DC chargers that output the DC voltage.

A conventional AC charger has a structure in which an AC input from an AC blade is rectified by a circuit in a preceding stage and converted into a certain DC voltage once, and the DC voltage is further reduced in a circuit in a subsequent stage to charge the battery. DC voltage, and is connected to a mobile phone via a cord or a connector.

On the other hand, the configuration of the conventional DC charger is to reduce the DC voltage inputted from the car plug to reduce the DC voltage for charging the battery.
It is precisely controlled to the C voltage, and is also connected to a mobile phone via a cord or a connector.

FIG. 4 shows an example of such a conventional AC charger and DC charger. In FIG. 1, the AC charger 1 has a primary-side protection / rectification circuit 102 connected to an AC blade 101 as a preceding circuit. A subsequent circuit connected to the preceding circuit includes a step-down circuit 103 including a switching regulator, a charge control circuit 104, and an output protection circuit 105.
6, the charging plug 107 is connected.

The DC charger 2 includes a primary side protection circuit 20 connected to the car plug 201 as a preceding circuit.
2 A subsequent circuit connected to the preceding circuit is a step-down circuit 20 including a switching regulator and the like.
3, a charge control circuit 204, and an output protection circuit 205. A charge plug 207 is connected to a circuit at a subsequent stage through a cord 206. By the way, as is clear from FIG. 4, the portion after the circuit in the subsequent stage of the DC charger 2 is basically equal to the portion after the circuit in the subsequent stage of the AC charger 1.

[0007]

As described above, although there is an irrational aspect that each charger has equivalent circuits and components, the user of a general portable telephone can change the situation according to the situation. In order to use them properly, it is necessary to purchase both of these two types of chargers, a financial burden, and,
There is a problem such as securing a storage place when not in use.

The present invention solves this problem by using A
It is an object of the present invention to provide a charger, a charging component, and a charger adapter that are inexpensive and small in size as a whole by sharing equivalent circuits and components between the C charger and the DC charger.

[0009]

According to a first aspect of the present invention, there is provided a charger according to the present invention, comprising: a DC input terminal; a protection circuit connected to the DC input terminal and having an overvoltage protection function; A protection / rectification circuit connected to the AC input terminal and having an overvoltage protection function and a rectification function and outputting a predetermined DC voltage; and an output voltage of these circuits connected to the protection circuit and the protection / rectification circuit. , A circuit for controlling the output voltage of the step-down circuit and outputting the same as a charging output, and a charging output terminal connected to the circuit.

[0010] As described above, a part of the charger is commonly used for AC charging and DC charging.
It is possible to realize an inexpensive and compact charger for C charging and DC charging in total.

[0011] The charging DC according to the second aspect of the present invention.
The input component is connected to the DC input terminal, the DC input terminal, a protection circuit having an overvoltage protection function, and connected to the protection circuit, and is detachably connected to the input terminal of the charging AC / DC common component. And an output terminal.

The charging DC input component is connected to a charging AC / D
It can function as a DC charger by combining with C common parts. According to a third aspect of the present invention, there is provided a charging AC input component connected to an AC input terminal and having an overvoltage protection function and a rectification function, and outputs a predetermined DC voltage. It is characterized by comprising a rectifier circuit and an output terminal connected to the protection / rectifier circuit and detachably connected to an input terminal of the AC / DC common part for charging.

[0013] This charging AC input component is connected to a charging AC / D
It can function as an AC charger by combining with C common parts. An AC / DC common part for charging according to the present invention according to claim 4, wherein the input terminal is detachably connected to the output terminal of the DC input part for charging or the output terminal of the AC input part for charging, and the input terminal. A step-down circuit for stepping down a voltage input from the circuit, a circuit for controlling an output voltage of the step-down circuit and outputting the output as a charging output, and a charging output terminal connected to the circuit. .

The AC / DC common parts for charging are
It can function as an AC charger by combining with a C input component, and can also function as a D / C by combining this charging AC / DC common component with a charging DC input component.
It can function as a C charger.

[0015] The battery charger according to the present invention described in claim 5 is
An AC input terminal, a protection / rectification circuit connected to the AC input terminal and having an overvoltage protection function and a rectification function, a step-down circuit for stepping down an output voltage of the protection / rectification circuit, and connected to the step-down circuit; A charger AC adapter having an output terminal detachably connected to a DC input terminal of a DC charger, a DC input terminal, a protection circuit connected to the DC input terminal and having an overvoltage protection function, and the protection circuit And a DC charger having a circuit for controlling the output voltage and outputting the output as a charging output, and a charging output terminal connected to the circuit. .

In the charger comprising the AC adapter for the charger and the DC charger, the output terminal of the AC adapter for the charger is detached from the DC input terminal of the DC charger, that is, the DC charger can be used alone. With the output terminal of the charger AC adapter connected to the DC input terminal of the DC charger, it can function as an AC charger. In this way, by using a configuration in which the DC charger is shared for AC charging and DC charging, A
It is possible to realize an inexpensive and compact charger for C charging and DC charging in total.

[0017] A for a charger according to the present invention according to claim 6
The C adapter is connected to an AC input terminal and is connected to the AC input terminal and has an overvoltage protection function and a rectifying function.
A rectifier circuit, a step-down circuit for stepping down an output voltage of the protection / rectifier circuit, and a DC charger D connected to the step-down circuit.
And an output terminal detachably connected to the C input terminal. Connect the AC adapter for this charger to DC
By combining with a charger, it can function as an AC charger.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, a first embodiment of the charger according to the present invention will be described. The configuration is shown in FIG.

The first embodiment is an integrated charger for both AC and DC, and as shown in FIG.
0, an AC input unit 20, and an AC / DC common unit 30. The DC input unit 10 corresponds to a circuit at the preceding stage of a conventional DC charger, and includes a car plug 11 as an input terminal of DC12 / 24V, and a primary protection circuit 12 connected to the car plug 11. The primary side protection circuit 12 is configured by, for example, a Zener diode or the like and has an overvoltage protection function.

The AC input unit 20 corresponds to a circuit in the preceding stage of the conventional AC charger, and includes an AC blade 21 as an input terminal of 100 V AC, and a primary protection / rectification circuit 22 connected to the AC blade 21. Become. This primary side protection
The protection circuit of the rectifier circuit 22 is configured by, for example, a Zener diode or the like and has an overvoltage protection function. The output voltage of the rectifier circuit is the input voltage D of the DC input unit 10.
C12V / 24V.

As described above, the input terminals AC and D
Two types of C are provided so that both can be used depending on the application. The AC / DC common unit 30 includes a step-down circuit 31 including a switching regulator and the like connected to the primary side protection circuit 12 and the primary side protection / rectification circuit 22, a charge control circuit 32, an output protection circuit 33, and an output thereof. It comprises components such as a cord 34 connected to the protection circuit 33 and a charging plug 35 serving as a charging output terminal. The charge control circuit 1
Numeral 4 monitors the charging voltage, and controls so that the application of the charging voltage is stopped when the charging voltage becomes higher than a predetermined level. The output protection circuit 35 has a protection function against a short circuit or the like.

As described above, by adopting a configuration in which the circuit and parts at the subsequent stage are shared for AC charging and DC charging, charging that is inexpensive and compact as a whole for AC charging and DC charging. Vessel can be realized.

Next, a second embodiment of the charger according to the present invention will be described. The configuration is shown in FIG. This second
In the third embodiment, the DC input unit 10, the AC input unit 20, and the AC / DC common unit 30 of the AC / DC common integrated charger according to the first embodiment are each configured as an independent charging component. It consists of a combination of two charging components.

That is, the charging DC input component 40 shown in FIG. 2A, the charging AC input component 50 shown in FIG.
And a combination of charging AC / DC common parts 60 shown in FIG.

The charging DC input component 40 is a DC 12/2
Car plug 41, car plug 4 as 4V input terminal
1 and a concave connector which is connected to the primary protection circuit 42 and serves as an output terminal which is detachably connected to the convex connector 61 of the AC / DC common component 60 for charging. 43.

The charging AC input component 50 is an AC 100
An AC blade 51 as an input terminal of V, a primary-side protection / rectifier circuit 52 connected to the AC blade 51,
AC / DC for charging, connected to the secondary protection / rectifier circuit 52
The common connector 60 includes a concave connector 53 serving as an output terminal which is detachably connected to the convex connector 61. The rectified output voltage of the primary side protection / rectifier circuit 52 is
The input voltage is made equal to DC12V / 24V which is an input voltage of 0.

The charging AC / DC common component 60 includes a convex connector 61 detachably connected to the concave connector 43 of the charging DC input component 40 or the concave connector 53 of the charging AC input component 50. Circuit 6 composed of a switching regulator and the like connected to the mold connector 61
2. It is composed of components such as a charge control circuit 63, an output protection circuit 64, a cord 65 connected to the output protection circuit 64, and a charging plug 66 serving as a charging output terminal.

When charging is performed by DC using these charging components, of the three charging components, the charging DC input component 40 and the charging AC / DC shared component 60 are used, and the charging DC input component is used. Connect the concave connector 43 of the component 40 to the charging AC
It may be used by being connected to the convex connector 61 of the / DC shared component 60.

When charging with AC using these charging components, of the three charging components,
The input connector 50 and the charging AC / DC shared component 60 may be used by connecting the concave connector 53 of the charging AC input component 50 to the convex connector 61 of the charging AC / DC shared component 60.

By using a combination of three charging components as in the second embodiment, the cost and storage space can be reduced as compared with the case where an AC charger and a DC charger are prepared.

Next, a third embodiment of the battery charger according to the present invention will be described. The configuration is shown in FIG. This third
This embodiment is a charger in which an AC adapter for AC 100 V input / DC output is prepared in place of the AC charger and combined with a DC charger.

FIG. 3A shows an AC adapter 7 for a charger.
0, FIG. 4B shows a DC charger 80. A for charger
The C adapter 70 is connected to the A
C-blade 71, primary side protection / rectification circuit 72 connected to AC blade 71, isolated primary step-down circuit 73 connected to primary side protection / rectification circuit 72, and car plug as output terminal Are inserted into the socket, that is, a car jack 74. At this time, the output voltage is also DC12V / 24 which is the input voltage of the DC charger 80.
Match with V.

The DC charger 80 includes a car plug 81 serving as a DC input terminal, a primary protection circuit 82 connected to the car plug 81, a step-down converter including a switching regulator connected to the primary protection circuit 82, and the like. It comprises components such as a circuit 83, a charge control circuit 84, an output protection circuit 85, a cord 86 connected to the output protection circuit, and a charging plug 87 serving as a charging output terminal. Note that this DC charger 8
0 is the same as the conventional DC charger, and the conventional DC charger can be used as it is.

With such a configuration, the DC charger 80 can be used alone in the vehicle, and its D
The AC charger function can be realized by combining the C charger 80 with the charger adapter 70.

[0035]

As described above, according to the present invention, 2
Compared to purchasing both types of chargers, it is possible to reduce the number of circuits and components that occupy a large part both in circuit size and cost by one charger, and to provide small and inexpensive ones. Become.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration example of a conventional charger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... DC input part 11 ... Car plug 12 ... Primary side protection circuit 20 ... AC input part 21 ... AC blade 22 ... Primary side protection and rectification circuit 30 ... AC / DC common part 31 ... Step-down circuit 32 ... Charge control circuit 33 ... output protection circuit 34 ... cord 35 ... charging plug 40 ... charging DC input part 41 ... car plug 42 ... primary side protection circuit 43 ... concave connector 50 ... charging AC input part 51 ... AC blade 52 ... primary Side protection / rectifier circuit 53 ... concave connector 60 ... AC / DC common parts for charging 61 ... convex connector 62 ... step-down circuit 63 ... charge control circuit 64 ... output protection circuit 65 ... cord 66 ... charging plug 70 ... AC adapter for charger 71 ... AC blade 72 ... Primary side protection / rectifier circuit 73 ... Primary step-down circuit 74 ... Car jack 80 ... DC charger 81 ... Car plug 8 2: Primary protection circuit 83: Step-down circuit 84: Charge control circuit 85: Output protection circuit 86: Cord 87: Charge plug 1: AC charger 101: AC blade 102: Primary side protection / rectification circuit 103: Step-down circuit 104 ... Charge control circuit 105 ... Output protection circuit 106 ... Code 107 ... Charging plug 2 ... DC charger 201 ... Car plug 202 ... Primary side protection circuit 203 ... Step-down circuit 204 ... Charge control circuit 205 ... Output protection circuit 206 ... Code 207 ... Charging plug

Claims (6)

[Claims] A DC input terminal, a protection circuit connected to the DC input terminal and having an overvoltage protection function, an AC input terminal, and an overvoltage protection function connected to the AC input terminal.
And has a rectification function and outputs a predetermined DC voltage.
A rectification circuit, a step-down circuit connected to the protection circuit and the protection / rectification circuit, and stepping down an output voltage of these circuits; a circuit controlling the output voltage of the step-down circuit to output the output as a charging output; And a charging output terminal connected to the charger. 2. A DC input terminal, a protection circuit connected to the DC input terminal and having an overvoltage protection function, connected to the protection circuit, and detachably connected to an input terminal of a common AC / DC component for charging. A DC input component for charging, comprising: an output terminal; 3. An AC input terminal, which is connected to the AC input terminal, has an overvoltage protection function and a rectifying function,
A charging / charging device comprising: a protection / rectifier circuit for outputting a C voltage; and an output terminal connected to the protection / rectifier circuit and detachably connected to an input terminal of a common AC / DC component for charging. AC input parts. 4. An input terminal detachably connected to an output terminal of a charging DC input component or an output terminal of a charging AC input component, a step-down circuit for stepping down a voltage input from the input terminal, and a step-down circuit. A charging AC / D, comprising: a circuit for controlling an output voltage of a circuit to output the output as a charging output; and a charging output terminal connected to the circuit.
C common parts. 5. An AC input terminal, a protection / rectification circuit connected to the AC input terminal and having an overvoltage protection function and a rectification function, a step-down circuit for stepping down an output voltage of the protection / rectification circuit, and a step-down circuit Connected to the circuit, DC charger DC
A charger AC adapter having an output terminal detachably connected to the input terminal; a DC input terminal; a protection circuit connected to the DC input terminal and having an overvoltage protection function;
A step-down circuit for stepping down an output voltage of the protection circuit, a circuit for controlling the output voltage and outputting the output as a charging output, and a DC charger having a charging output terminal connected to the circuit. Characteristic charger. 6. An AC input terminal, a protection / rectification circuit connected to the AC input terminal and having an overvoltage protection function and a rectification function, a step-down circuit for stepping down an output voltage of the protection / rectification circuit, and a step-down circuit. Connected to the circuit, DC charger DC
An AC adapter for a charger, comprising: an output terminal detachably connected to an input terminal.