JPH04109825A - Power supply circuit - Google Patents
Power supply circuitInfo
- Publication number
- JPH04109825A JPH04109825A JP22570890A JP22570890A JPH04109825A JP H04109825 A JPH04109825 A JP H04109825A JP 22570890 A JP22570890 A JP 22570890A JP 22570890 A JP22570890 A JP 22570890A JP H04109825 A JPH04109825 A JP H04109825A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- secondary battery
- circuit
- voltage
- battery
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は電子機器の電源回路に関し特に携帯用機器の電
源回路構成に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply circuit for electronic equipment, and particularly to a power supply circuit configuration for portable equipment.
Ｃ従来の技術］
従来の電子機器、特に携帯用コンピュータの電源回路は
電池電源を定電圧化し各々の回路に電源を供給していた
。その電源回路例を第２図に示す。C. Prior Art] Conventional power supply circuits for electronic devices, particularly portable computers, have been configured to use battery power at a constant voltage to supply power to each circuit. An example of the power supply circuit is shown in FIG.
１は二次電池であり２は定電圧回路、４は電源負荷、６
は大電流負荷である。そしてどんな状態でも定電圧回路
出力を安定に供給するためｉ：電池の直列接続本数が多
くなっていた。また全ての電源負荷に対して電源回路か
ら供給するため電源回路容量が非常に大きかった。1 is a secondary battery, 2 is a constant voltage circuit, 4 is a power supply load, 6
is a large current load. In order to stably supply constant voltage circuit output under any conditions, the number of batteries connected in series has increased. In addition, since all power loads are supplied from the power supply circuit, the capacity of the power supply circuit is extremely large.
［発明が解決しようとする課題］
しかし、従来の技術では電池電源として用いる二次電池
の本数が多く必要であり、また電源回路の定電圧回路の
容量が多く必要であり、そのため大きなスペースが必要
でありコストも高くなるという問題点があった。そこで
本発明はこのような問題点を解決するものであり、その
目的とするところはコンパクトで安価な電源回路を供給
する事のある。[Problem to be solved by the invention] However, the conventional technology requires a large number of secondary batteries to be used as a battery power source, and also requires a large capacity of the constant voltage circuit of the power supply circuit, which requires a large space. Therefore, there was a problem that the cost was also high. The present invention is intended to solve these problems, and its purpose is to provide a compact and inexpensive power supply circuit.
［課題を解決するための手段］
二次電池を電源として有する機器において、ｎ本の二次
電池が（ｎ＝回路動作電圧／二次電池一本の標準電圧）
直列接続された電池電源、該電池電源の電圧を定電圧化
する定電圧回路、該二次電池が充電中であるか否かを検
出する検出手段、該検出手段の出力により電源負荷を前
記定電圧回路に接続したり、電池電源に接続したりする
電源切り換え回路から構成されている事を特徴とする電
源回路及び上記電源回路において、５００ｍＡ以上の電
源負荷が電池電源に接続されている事を特徴とするｒｔ
電源回
路作用コ
本発明の上記の構成によれば二次電池が充電状態にある
ときは定電圧回路から電源が電源負荷に（電子回路等）
供給される。充電状態ではない時には二次電池から電源
が電源負荷に供給される。[Means for solving the problem] In a device that uses a secondary battery as a power source, n secondary batteries (n = circuit operating voltage / standard voltage of one secondary battery)
A battery power supply connected in series, a constant voltage circuit that makes the voltage of the battery power supply constant, a detection means that detects whether or not the secondary battery is being charged, and a power supply load that is controlled by the output of the detection means. In the power supply circuit characterized by being composed of a power supply switching circuit connected to a voltage circuit or to a battery power supply, and in the above power supply circuit, a power supply load of 500 mA or more is connected to the battery power supply. Featured rt
Power supply circuit operation According to the above configuration of the present invention, when the secondary battery is in a charging state, the power supply is transferred from the constant voltage circuit to the power supply load (electronic circuit, etc.)
Supplied. When the battery is not in a charging state, power is supplied from the secondary battery to the power load.
また５００ｍＡ以上の電源負荷は二次電池から常に電源
が供給される。In addition, a power supply load of 500 mA or more is always supplied with power from the secondary battery.
［実施例］ 第１図に本発明の電源回路の一実施例を示す。[Example] FIG. 1 shows an embodiment of the power supply circuit of the present invention.
いま充電状態だとすると二次電池１に充電回路が接続さ
れており（図示せず）二次電池１の電圧が高くなり検出
手段５が充電状態である事を検出する。そして電源切り
換え回路３を制御し定電圧回路２の定電圧出力を電源負
荷４に供給する。そして充電状態ではないときは、充電
回路が二次電池から切れて電圧が下がる。検出手段５は
それを検出して電源切り換え回路３の動作により電源負
荷４に二次電池１を接続する。６は５００ｍＡ以上の大
電流負荷であり（携帯型のコンピュータのＦＤＤ、液晶
表示のバックライト等）常に二次電池１に接続されてい
る。この実施例では二次電池１は四本を直列接続してい
る。また検出手段はこの例では電圧を検出して動作をす
るとしたが、充電回路もしくはＡＣアダプターをこの機
器に接続したときに機械的に動作するスイッチの様なも
のでも何等変わりはない。If the secondary battery 1 is currently in a charging state, a charging circuit (not shown) is connected to the secondary battery 1, and the voltage of the secondary battery 1 becomes high, and the detection means 5 detects that it is in a charging state. Then, the power source switching circuit 3 is controlled to supply the constant voltage output of the constant voltage circuit 2 to the power source load 4. When the battery is not being charged, the charging circuit is disconnected from the secondary battery and the voltage drops. The detection means 5 detects this and connects the secondary battery 1 to the power supply load 4 by operating the power supply switching circuit 3. 6 is a large current load of 500 mA or more (FDD of a portable computer, backlight of a liquid crystal display, etc.), which is always connected to the secondary battery 1. In this embodiment, four secondary batteries 1 are connected in series. Further, in this example, the detection means operates by detecting voltage, but it may also be a switch that operates mechanically when a charging circuit or an AC adapter is connected to this device.
［発明の効果］
以上述べたように本発明の構成にすれば、充電時以外は
、二次電池から電源負荷である回路等に電源を供給する
ため二次電池直列本数は回路等が動作するに必要な電圧
を確保できれば良い事から最低本数でよい事になる。第
１図に示す例では、電源負荷４の回路等が４．５Ｖ以上
あれば動作可能という事で、二次電池１本１．２Ｖとす
ると４本で充分動作可能である。充電時は二次電池１本
１．６Ｖ位に上昇するがその時は定電圧回路２で二次電
池１を定電圧化し電源負荷４に供給するため回路等の電
源負荷は動作可能となる。従来の電源回路では常に定電
圧化しようとしているため、定電圧出力電圧よりも常に
２次電池の電圧が高い必要があり少なくとも二次電池６
本以上直列接続する必要があった。[Effects of the Invention] As described above, with the configuration of the present invention, the circuits, etc. operate as long as the secondary batteries are connected in series, since power is supplied from the secondary batteries to the circuits, etc., which are power loads, except when charging. As long as the necessary voltage can be secured, the minimum number of wires is sufficient. In the example shown in FIG. 1, if the circuit of the power supply load 4 is 4.5V or higher, it can be operated, so if one secondary battery has a voltage of 1.2V, four batteries are sufficient for operation. During charging, the voltage rises to about 1.6V for each secondary battery, but at that time, the voltage of the secondary battery 1 is regulated by the constant voltage circuit 2 and supplied to the power supply load 4, so that the power supply loads such as circuits can be operated. Conventional power supply circuits always try to maintain a constant voltage, so the voltage of the secondary battery must always be higher than the constant voltage output voltage.
It was necessary to connect more than one in series.
この結果電池の本数が少なくて済み、コスト・スペース
の点で有利な条件を与える事ができる。As a result, the number of batteries can be reduced, providing advantageous conditions in terms of cost and space.
また５００ｍＡ以上の大電流負荷・例えば携帯型のコン
ピュータのフロッピィ−ディスクドライブ、バックライ
トは二次電池４本直列でも充分駆動可能であり第１図の
様に大電流負荷６は二次電池に接続しておけば定電圧回
路の電流容量は非常に小さくて済む。例えば携帯型のコ
ンピュータの場合従来は２０００ｍＡ以上必要であった
が、本発明によると約３００ｍＡ″′Ｃ済み電源回路の
コスト、スペース面で大きな効果が得られる。また定電
圧回路の電流容量が非常に小さくなる事から放熱に関す
る間願も大幅に軽減される。In addition, large current loads of 500 mA or more, such as the floppy disk drive and backlight of a portable computer, can be sufficiently driven with four secondary batteries in series, and as shown in Figure 1, the large current load 6 is connected to the secondary battery. If this is done, the current capacity of the constant voltage circuit will be very small. For example, in the case of a portable computer, 2000 mA or more was conventionally required, but according to the present invention, a large effect can be obtained in terms of cost and space with a power supply circuit that is approximately 300 mA'''C.Also, the current capacity of the constant voltage circuit is extremely low. Since the size is smaller, requirements regarding heat dissipation are also significantly reduced.
以上述べたように本発明の採用はコスト・スペースの面
で大きな効果をもたらすものである。As described above, adoption of the present invention brings about significant effects in terms of cost and space.
第１図は本発明による電源回路の構成図。
第２図は従来の電源回路構成図。
１・・・二次電池 ２・・・定電圧回路 ３・・・電源
切り換え回路 ４・・・電源負荷 ５・・・検出手段
６・・・大電流負荷
以 上
出願人 セイコーエプソン株式会社FIG. 1 is a configuration diagram of a power supply circuit according to the present invention. FIG. 2 is a conventional power supply circuit configuration diagram. 1... Secondary battery 2... Constant voltage circuit 3... Power supply switching circuit 4... Power supply load 5... Detection means
6...Large current load or more Applicant: Seiko Epson Corporation
Claims (2)
の二次電池が（ｎ＝回路動作電圧／二次電池一本の標準
電圧）直列接続された電池電源、該電池電源の電圧を定
電圧化する定電圧回路、該二次電池が充電中であるか否
かを検出する検出手段、該検出手段の出力により電源負
荷を前記定電圧回路に接続したり、電池電源に接続した
りする電源切り換え回路を有する事を特徴とする電源回
路。(1) In a device that uses a secondary battery as a power source, a battery power source in which n secondary batteries are connected in series (n = circuit operating voltage / standard voltage of one secondary battery), and the voltage of the battery power source is determined. A constant voltage circuit that converts into voltage, a detection means that detects whether or not the secondary battery is being charged, and a power supply load that is connected to the constant voltage circuit or to the battery power source based on the output of the detection means. A power supply circuit characterized by having a power supply switching circuit.
５００ｍＡ以上の電源負荷が電池電源に接続されている
事を特徴とする電源回路(2) In the power supply circuit according to claim 1,
A power supply circuit characterized in that a power supply load of 500mA or more is connected to a battery power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22570890A JPH04109825A (en) | 1990-08-28 | 1990-08-28 | Power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22570890A JPH04109825A (en) | 1990-08-28 | 1990-08-28 | Power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04109825A true JPH04109825A (en) | 1992-04-10 |
Family
ID=16833560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22570890A Pending JPH04109825A (en) | 1990-08-28 | 1990-08-28 | Power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04109825A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005218159A (en) * | 2004-01-27 | 2005-08-11 | Toyota Motor Corp | Drive voltage supply device and computer readable storage medium recording program for making computer conduct drive voltage supply |
-
1990
- 1990-08-28 JP JP22570890A patent/JPH04109825A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005218159A (en) * | 2004-01-27 | 2005-08-11 | Toyota Motor Corp | Drive voltage supply device and computer readable storage medium recording program for making computer conduct drive voltage supply |
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