JP3286937B2 - Charging device - Google Patents
Charging deviceInfo
- Publication number
- JP3286937B2 JP3286937B2 JP04356497A JP4356497A JP3286937B2 JP 3286937 B2 JP3286937 B2 JP 3286937B2 JP 04356497 A JP04356497 A JP 04356497A JP 4356497 A JP4356497 A JP 4356497A JP 3286937 B2 JP3286937 B2 JP 3286937B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- current
- power supply
- supply unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、簡単な構成によ
り、バッテリの充電電流を円滑に切替えることができる
充電装置に関する。 [0001] The present invention relates to a simple configuration.
The battery charging current can be switched smoothly
It relates to a charging device.
【０００２】[0002]
【従来の技術】図３はバッテリの充電装置に於ける従来
の充電電流切替制御回路を示し、１は電源部、２はバッ
テリ、３は充電電流切替制御回路、１１は増幅器、１２
はコントロールＩＣ、Ｒ０，Ｒ１，Ｒ２は抵抗、Ｖ ref
は基準電圧、Ｖ A は制御電圧、Ｖ B は出力電流制御電
圧、Ｖ O は出力電圧、Ｉ 0 は出力電流を示す。 2. Description of the Related Art FIG . 3 shows a conventional battery charger.
1 is a power supply unit, and 2 is a battery current switching control circuit.
3, charging current switching control circuit, 11 amplifier, 12
Is a control IC, R0, R1, R2 are resistors, V ref
Reference voltage, V A is the control voltage, V B output current control electric
, V O indicates an output voltage, and I 0 indicates an output current.
【０００３】電源部１は、ＡＣ（交流）入力電圧を整流
平滑化したＤＣ（直流）の出力電圧Ｖ O をバッテリ２に
印加して、バッテリ２の充電を行うものである。このバ
ッテリ２は、例えば、携帯電話機等の携帯機器用の動作
電源としてのバッテリであり、安定な急速充電が要望さ
れているものである。そこで、充電電流切替制御回路３
は、コントロールＩＣ（出力電圧Ｖ O と内蔵基準電圧と
比較して制御電圧Ｖ A を出力する集積回路）１２と、出
力電流制御電圧Ｖ B を電源部１に加える増幅器 １１とを
含む構成を有し、例えば、２段階に充電電流を切替える
ことができるものである。 The power supply unit 1 rectifies an AC (AC) input voltage.
The smoothed DC (direct current) output voltage V O is supplied to the battery 2.
The charging is performed to charge the battery 2. This ba
The battery 2 operates, for example, for a mobile device such as a mobile phone.
It is a battery as a power source, and stable fast charging is demanded.
It is what has been. Therefore, the charging current switching control circuit 3
Is a control IC (output voltage V O and built-in reference voltage
And an integrated circuit 12 for outputting the control voltage VA by comparison.
And an amplifier 11 for applying a force current control voltage V B to the power supply unit 1
For example, switching the charging current in two stages
Is what you can do.
【０００４】電源部１の出力電圧Ｖ O が、或る値Ｖ
01 （例えばＶ 01 ＝３．５Ｖ）以下の時、コントロールＩ
Ｃ１２の出力はオフ、即ち、出力端子はオープン状態と
なり、制御電圧Ｖ A は、Ｖ A01 ＝Ｖ O ・Ｒ２／（Ｒ１＋
Ｒ２）となる。又出力電圧Ｖ O がＶ 01 を超えると、コン
トロールＩＣ１２は出力電圧を抵抗Ｒ１，Ｒ２の接続点
に印加する。それにより、制御電圧Ｖ A が高くなって、
別の値Ｖ A02 ( ＞Ｖ A01 ）となる。 [0004]Output voltage V of power supply unit 1 O Is a certain value V
01 (Eg V 01 = 3.5V), control I
The output of C12 is off, that is, the output terminal is open.
And the control voltage V A Is V A01 = V O ・ R2 / (R1 +
R2). Output voltage V O Is V 01 Exceeds
The troll IC 12 outputs the output voltage to the connection point of the resistors R1 and R2.
Is applied. Thereby, the control voltage V A Is higher,
Another value V A02 (> V A01 ).
【０００５】増幅器１１は、基準電圧Ｖ ref と比較する
制御電圧Ｖ A01 ，Ｖ A02 に応じて出力電流制御電圧Ｖ B
をＶ B01 ，Ｖ B02 として電源部１に加える。電源部１は
出力電流制御電圧Ｖ B01 又はＶ B02 に応じて、出力電流
Ｉ 0 を、第１の電流値Ｉ 01 、例えば８００ｍＡ、又は第
２の電流値Ｉ 02 、例えば５８０ｍＡに切替える。 [0005] The amplifier 11 compares with a reference voltage Vref .
The output current control voltage V B according to the control voltages V A01 and V A02
Are applied to the power supply unit 1 as V B01 and V B02 . Power supply unit 1
Output current according to the output current control voltage V B01 or V B02
I 0 is set to a first current value I 01 , for example, 800 mA , or
The current value I 02 is switched to 2 , for example, 580 mA.
【０００６】図４は従来の充電電流切替制御回路の動作
の説明図であって、(a) は充電電流（Ｉ O ）・出力電圧
（Ｖ O ）特性を示し、(b) は充電電流（Ｉ O ）・時間
（ｔ）特性を示す。図３に示す従来の充電電流切替制御
回路は、(a) に示すように、出力電圧Ｖ O がＶ 01 （＝
３．５Ｖ）を超えると、充電電流Ｉ 0 は、のＩ 01 （＝
８００ｍＡ）の状態からのＩ 02 （＝５８０ｍＡ）の状
態に切替える。 FIG . 4 shows the operation of the conventional charging current switching control circuit.
(A) is a charging current (I O ) / output voltage
(V O ) characteristics, and (b) shows the charging current (I O ) · time
(T) shows characteristics. Conventional charge current switching control shown in FIG.
As shown in (a), the circuit has an output voltage V O equal to V 01 (=
When the voltage exceeds 3.5 V), the charging current I 0 becomes I 01 (=
I 02 (= 580 mA) from the state of 800 mA)
Switch to state.
【０００７】この場合、充電電流の切替直後のの状態
では、(b) に示すように、充電電流Ｉ 0 が不安定になっ
て、電流値が変動を繰り返す現象が生じることがある。
これは出力電圧Ｖ O を検出するコントロールＩＣ１２の
利得が大きい為に、出力電圧Ｖ O の僅かな変化によって
も充電電流の切替えが生じることによるものであり、不
安定状態となる。 In this case, the state immediately after the switching of the charging current is performed.
Then, as shown in (b), the charging current I 0 becomes unstable.
As a result, a phenomenon in which the current value repeatedly fluctuates may occur.
This is the control IC 12 for detecting the output voltage V O.
Due to the large gain , slight changes in the output voltage V O
Is also caused by switching of the charging current.
It will be in a stable state.
【０００８】[0008]
【発明が解決しようとする課題】充電電流切替機能を有
するバッテリ充電装置に於いて、充電電流の切替時に、
前述のように不安定状態となると、バッテリに対して不
要なストレスを与えることになり、発熱したりして、バ
ッテリの寿命を著しく短縮する問題がある。 本発明は、
充電電流の切替えを安定に行わせることを目的とする。 A charging current switching function is provided.
When the charging current is switched,
When the battery becomes unstable as described above,
This will give the necessary stress, generate heat,
There is a problem that the life of the battery is significantly shortened. The present invention
It is an object to stably switch a charging current.
【０００９】[0009]
【課題を解決するための手段】本発明の充電装置は、図
１を参照して説明すると、交流電圧を直流電圧に変換し
た出力電圧Ｖ O をバッテリ２に印加して充電し、且つ出
力電流制御電圧Ｖ B を入力して出力電流Ｉ O を制御する
電源部１と、この電源部１の出力電圧Ｖ O を第１，第２
の抵抗Ｒ１，Ｒ２により分圧した電圧と第１の基準電圧
Ｖ ref とを比較して出力電流制御電圧Ｖ B を電源部１に
入力する増幅器１１と、第１の抵抗Ｒ１に並列に接続し
たトランジスタＱ１と第３の抵抗Ｒ３との直列回路と、
電源部１の出力電圧Ｖ O と第２の基準電圧Ｖ S との差分
を分圧してトランジスタＱ１のベースに印加する第４，
第５の抵抗Ｒ４，Ｒ５とを含む充電電流切替制御回路３
とを備えている。 The charging device according to the present invention has the following configuration.
Referring to FIG. 1, converting an AC voltage into a DC voltage
The output voltage V O is applied to the battery 2 for charging and output.
Controlling the output current I O to input force current control voltage V B
The power supply 1 and the output voltage V O of the power supply 1
And the first reference voltage divided by the resistors R1 and R2
By comparing the V ref the output current control voltage V B to the power supply unit 1
The input amplifier 11 and the first resistor R1 are connected in parallel.
A series circuit of the transistor Q1 and the third resistor R3,
Difference between output voltage V O of power supply unit 1 and second reference voltage V S
Is applied to the base of the transistor Q1.
Charge current switching control circuit 3 including fifth resistors R4 and R5
And
【００１０】[0010]
【発明の実施の形態】以下図１及び図２を参照して図１
は本発明の実施の形態について説明する。図１に於い
て、１は電源部、２はバッテリ、３は充電電流切替制御
回路、１１は増幅器、Ｒ１，Ｒ２，Ｒ４，Ｒ５は第１，
第２，第３，第４，第５の抵抗、Ｖ ref は第１の基準電
圧、Ｖ S は第２の基準電圧、ＶA は制御電圧、ＶB は出
力電流制御電圧、Ｖ O は出力電圧、Ｉ 0 は出力電流、Ｑ
１はトランジスタを示す。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, FIG.
A description will be given of an embodiment of the present invention. In Figure 1
1 is a power supply unit, 2 is a battery, 3 is a charging current switching control
Circuit, 11 is an amplifier, R1, R2, R4, R5 are the first
The second, third, fourth, fifth resistor, V ref is a first reference voltage, V S is the second reference voltage, V A is the control voltage, V B is the output current control voltage, V O is Output voltage, I 0 is output current, Q
1 indicates a transistor.
【００１１】増幅器１１は、電源部１の出力電圧Ｖ O を
第１，第２の抵抗Ｒ１，Ｒ２により分圧した電圧と第１
の基準電圧Ｖ ref とを比較して出力電流制御電圧Ｖ B を
電源部１に入力するものであり、又第１の抵抗Ｒ１に並
列にトランジスタＱ１と第３の抵抗Ｒ３との直列回路を
接続し、電源部１の出力電圧Ｖ O と第２の基準電圧Ｖ S
との差分を第４，第５の抵抗Ｒ４，Ｒ５により分圧し
て、トランジスタＱ１のベースに印加する。 The amplifier 11 outputs the output voltage V O of the power supply unit 1.
The voltage divided by the first and second resistors R1 and R2 and the first
The reference voltage V ref and the output current control voltage V B by comparing the
It is input to the power supply unit 1 and is connected to the first resistor R1.
A series circuit of a transistor Q1 and a third resistor R3 is
Connected, the output voltage V O of the power supply unit 1 and the second reference voltage V S
Is divided by the fourth and fifth resistors R4 and R5.
To the base of the transistor Q1.
【００１２】トランジスタＱ１は、出力電圧Ｖ O が或る
特定の値Ｖ 01 （例えばＶ 01 ＝３．５Ｖ）より或る程度小
さい時は、出力電圧Ｖ O と第２の基準電圧Ｖ S との差分
を第４、第５の抵抗Ｒ４，Ｒ５により分圧してベースに
印加する電圧が高いから、オフ状態であって、第１、第
２の抵抗Ｒ１，Ｒ２の接続点の電圧、即ち、増幅器１１
に対する制御電圧Ｖ A は、Ｖ A11 ( ＝Ｖ O ・Ｒ２／（Ｒ
１＋Ｒ２））となる。又出力電圧Ｖ O がＶ 01 より充分に
高い時は、トランジスタＱ１はオン状態となり、第１、
第２の抵抗Ｒ１，Ｒ２の接続点にトランジスタＱ１と第
３の抵抗Ｒ３とを介して出力電圧Ｖ O が印加されるか
ら、制御電圧Ｖ A は、最も高い状態の電圧Ｖ A12 とな
る。そして、出力電圧Ｖ O がこの２つの場合の中間の状
態では、トランジスタＱ１はベース電圧に対応した電圧
を第１、第２の抵抗Ｒ１，Ｒ２の接続点に印加するか
ら、制御電圧Ｖ A は、Ｖ A11 からＶ A12 出力電圧Ｖ O に
漸次移行する中間の電圧値となる。 The transistor Q1 has a certain output voltage V O.
Somewhat smaller than a specific value V 01 (for example, V 01 = 3.5 V)
The difference between the output voltage V O and the second reference voltage V S
Is divided by the fourth and fifth resistors R4 and R5 to form a base.
Since the applied voltage is high, the first and second
Voltage of the connection point of the two resistors R1 and R2, that is, the amplifier 11
Control voltage V A for the, V A11 (= V O · R2 / (R
1 + R2)). Also, the output voltage V O is sufficiently higher than V 01
When high, the transistor Q1 is turned on and the first,
The transistor Q1 is connected to the connection point of the second resistors R1 and R2.
The output voltage V O is applied via the resistor R3
Thus, the control voltage VA is the highest voltage VA12 .
You. Then, the output voltage V O is in a state intermediate between these two cases.
In the state, the transistor Q1 has a voltage corresponding to the base voltage.
Is applied to the connection point between the first and second resistors R1 and R2?
Et al., The control voltage V A from V A11 to V A12 output voltage V O
It has an intermediate voltage value that shifts gradually.
【００１３】増幅器１１は、第１の基準電圧Ｖ ref と制
御電圧Ｖ A とを比較して出力電流制御電圧Ｖ B を電源部
１に入力する。電源部１は出力電流制御電圧Ｖ B が、制
御電圧Ｖ A11 に対応する状態では、出力電流Ｉ 0 を、第
１の電流値Ｉ 01 例えば８００ｍＡとし、制御電圧Ｖ A12
に対応する状態では、出力電流Ｉ 0 を、第２の電流値Ｉ
02 例えば５８０ｍＡとし、中間の制御電圧値に対応する
状態では、出力電流Ｉ 0 を、第１の電流値Ｉ 01 から第２
の電流値Ｉ 02 に徐々に移行する中間の電流値の電流とす
る。 [0013] The amplifier 11 is, control the first reference voltage V ref
Power unit output current control voltage V B is compared with the control voltage V A
Enter 1 Power unit 1 the output current control voltage V B, the braking
In a state corresponding to the control voltage V A11 , the output current I 0 is
1, the current value I 01 is, for example, 800 mA , and the control voltage V A12
, The output current I 0 is changed to the second current value I
02 For example, 580 mA, corresponding to an intermediate control voltage value
In the state, the output current I 0 is changed from the first current value I 01 to the second current value I 01 .
Current value gradually changes to the current value I 02 of
You.
【００１４】図２に於いて、(a) は充電電流（Ｉ O ）・
出力電圧（Ｖ O ）特性を示し、(b)は充電電流（Ｉ O ）
・時間（ｔ）特性を示す。即ち、出力電圧Ｖ O がＶ
01 （＝３．５Ｖ）より大きくなる際に、出力電流Ｉ 0 が
のＩ 01 （＝８００ｍＡ）の状態からの中間の状態を
経て、のＩ 02 （＝５８０ｍＡ）の状態に緩やかに変化
する。従って、例えば、(a) に示すように、出力電圧が
３．５Ｖを中心として、３．２Ｖから３．８Ｖに変化す
る間に、出力電流Ｉ 0 がの８００ｍＡの状態からの
５８０ｍＡの状態に徐々に変化する。 [0014]In FIG. 2, (a) shows the charging current (I O ) ・
Output voltage (V O (B) shows the charging current (I O )
-Shows time (t) characteristics. That is, the output voltage V O Is V
01 (= 3.5V), the output current I 0 But
I 01 (= 800 mA)
After I 02 (= 580mA)
I do. Therefore, for example, as shown in FIG.
Changes from 3.2V to 3.8V centering on 3.5V
The output current I 0 From the state of 800mA
It gradually changes to a state of 580 mA.
【００１５】そして、(b) に示すように、時刻ｔ 0 に充
電電流をＩ 01 からＩ 02 に切替えを開始した時に出力電圧
の変動もなく、円滑な充電電流の切替えが可能となる。
従って、バッテリ２に対する充電時のストレス発生もな
く、バッテリ２の寿命を延長することが可能となる。 [0015] Then, as shown in (b), the charge and the time t 0
Output voltage when the current is switched from I 01 to I 02
, And smooth switching of the charging current is possible.
Therefore, no stress occurs when charging the battery 2.
As a result, the life of the battery 2 can be extended.
【００１６】[0016]
【発明の効果】以上説明したように、本発明は、電源部
１の出力電圧Ｖ O を第１，第２の抵抗Ｒ１，Ｒ２により
分圧した電圧と第１の基準電圧Ｖ ref とを比較して出力
電流制御電圧Ｖ B を電源部１に入力する増幅器１１と、
第１の抵抗Ｒ１に並列に接続したトランジスタＱ１と第
３の抵抗Ｒ３との直列回路と、電源部１の出力電圧Ｖ O
と第２の基準電圧Ｖ S との差分を分圧してトランジスタ
Ｑ１のベースに印加する第４，第５の抵抗Ｒ４，Ｒ５と
を含む充電電流切替制御回路３とを備えて、バッテリ２
の充電電流の切替えを行う充電装置であり、充電電流切
替時に出力電圧の変動もなく、円滑な切替えが可能とな
る。従って、バッテリ２に対する充電電流切替時のスト
レス発生もなく、安定な充電を自動的に行うことができ
る利点がある。 As described above, the present invention provides a power supply unit.
1 output voltage V O by the first and second resistors R1 and R2.
Output by comparing the divided voltage with the first reference voltage Vref
An amplifier 11 for inputting the current control voltage V B to the power supply unit 1,
The transistor Q1 connected in parallel to the first resistor R1 and the
3 in series with the resistor R3 and the output voltage V O of the power supply unit 1.
When the transistor by applying a minute difference between the second reference voltage V S
The fourth and fifth resistors R4 and R5 applied to the base of Q1;
And a charging current switching control circuit 3 including
This is a charging device that switches the charging current of
The output voltage does not fluctuate during switching and smooth switching is possible.
You. Therefore, when the charging current is switched to the battery 2,
No charge-free, stable charging can be performed automatically
There are advantages.
【図１】本発明の一実施形態を示す図である。FIG. 1 is a diagram showing one embodiment of the present invention.
【図２】本発明の充電電流切替制御回路の動作を説明す
る図である。[Figure 2] Ru FIG der explaining the operation of the charging current switching control circuit in the present invention.
【図３】従来の充電電流切替制御回路を示す図である。FIG. 3 is a diagram showing a conventional charging current switching control circuit.
【図４】従来の充電電流切替制御回路の動作を説明する
図である。[4] Ru FIG der explaining the operation of the conventional charging current switching control circuit.
１ 電源部 ２ バッテリ ３ 充電電流切替制御回路 Ｑ１ トランジスタ１１ 増幅器 Ｒ１〜Ｒ５ 第１〜第５の抵抗 Ｖ ref 第１の基準電圧 Ｖ S 第２の基準電圧 Reference Signs List 1 power supply unit 2 battery 3 charging current switching control circuit Q1 transistor 11 amplifiers R1 to R5 first to fifth resistors V ref first reference voltage V S second reference voltage
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−214234（ＪＰ，Ａ) 実公 昭55−17652（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 7/00 - 7/12 H02J 7/34 - 7/36 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-214234 (JP, A) Jikken Sho 55-17552 (JP, Y2) (58) Fields investigated (Int. Cl. 7 , DB name) H02J 7/00-7/12 H02J 7/34-7/36
Claims (1)
をバッテリに印加して充電し、且つ出力電流制御電圧を
入力して出力電流を制御する電源部と、 該電源部の出力電圧を第１，第２の抵抗により分圧した
電圧と第１の基準電圧とを比較して前記出力電流制御電
圧を前記電源部に入力する増幅器と、前記第１の抵抗に
並列に接続したトランジスタと第３の抵抗との直列回路
と、前記電源部の出力電圧と第２の基準電圧との差分を
分圧して前記トランジスタのベースに印加する第４，第
５の抵抗とを含む充電電流切替制御回路と を備えたこと
を特徴とする充電装置。 1. An output voltage obtained by converting an AC voltage into a DC voltage.
Is applied to the battery to charge it, and the output current control voltage is
A power supply for inputting and controlling an output current, and an output voltage of the power supply divided by first and second resistors
Comparing the output current control voltage with the first reference voltage.
And an amplifier for inputting a voltage to the power supply unit and the first resistor.
A series circuit of a transistor and a third resistor connected in parallel
And a difference between an output voltage of the power supply unit and a second reference voltage.
The fourth and fourth divided voltages are applied to the base of the transistor.
Further comprising a charge current switch control circuit including fifth and a resistor
A charging device characterized by the above-mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04356497A JP3286937B2 (en) | 1997-02-27 | 1997-02-27 | Charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04356497A JP3286937B2 (en) | 1997-02-27 | 1997-02-27 | Charging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10243569A JPH10243569A (en) | 1998-09-11 |
| JP3286937B2 true JP3286937B2 (en) | 2002-05-27 |
Family
ID=12667249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04356497A Expired - Fee Related JP3286937B2 (en) | 1997-02-27 | 1997-02-27 | Charging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3286937B2 (en) |
-
1997
- 1997-02-27 JP JP04356497A patent/JP3286937B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10243569A (en) | 1998-09-11 |
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