JPH1141825A - Power source switch device - Google Patents

Power source switch device

Info

Publication number
JPH1141825A
JPH1141825A JP9188810A JP18881097A JPH1141825A JP H1141825 A JPH1141825 A JP H1141825A JP 9188810 A JP9188810 A JP 9188810A JP 18881097 A JP18881097 A JP 18881097A JP H1141825 A JPH1141825 A JP H1141825A
Authority
JP
Japan
Prior art keywords
voltage
switching
battery
power
converter
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
Application number
JP9188810A
Other languages
Japanese (ja)
Inventor
Kazuhiko Matsumura
和彦 松村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP9188810A priority Critical patent/JPH1141825A/en
Publication of JPH1141825A publication Critical patent/JPH1141825A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Landscapes

  • Stand-By Power Supply Arrangements (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PROBLEM TO BE SOLVED: To increase the power efficiency of a battery mounted on a portable electronic appliance, by switching to DC voltage generated by a DC voltage converter means at the time of a main driving condition which requires large power, and to battery at the time of a standby condition which requires small power. SOLUTION: A battery 10 outputs battery voltage VB of positive polarity to a step-down DC/DC converter 11 and the terminal (b) of a switch means 13. The switch means 13 conducts switching to the terminal (b) at the time of a standby condition which requires small power, and makes the voltage V01 of a terminal (c) equal to the battery voltage VB, which is then outputted to series regulators 15A to 15N. As a result, a power switch device 1 stops the operation of the step-down DC/DC converter 11 at the time of the standby condition which requires small power and makes power loss at the step-down DC/DC converter 11 to zero. It is thus possible to minimize the power loss of the whole device.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、負荷消費電力に応
じて電源の切替を行う電源切替装置に係り、携帯機器に
搭載したバッテリの電力利用効率を高めてバッテリの長
寿命化が図れる電源切替装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply switching device for switching a power supply in accordance with load power consumption, and to a power supply switching device capable of increasing the power use efficiency of a battery mounted on a portable device and extending the life of the battery. Related to the device.

【０００２】[0002]

【従来の技術】バッテリ駆動を前提としたノートパソコ
ンやビデオカメラ等の携帯機器において、消費電力が大
きい主駆動状態と、主駆動状態時の消費電力に比べて極
端に消費電力が小さい待機状態とで、搭載したバッテリ
の電力利用効率を高めてバッテリの長寿命化を図るため
の電源切替装置として、例えば図５に示すような電源切
替装置がある。図５において、電源切替装置５０は、バ
ッテリ５１、降圧型スイッチング・レギュレータ５２、
シリーズ・レギュレータ５３、制御手段５４及び切替手
段５５を備える。2. Description of the Related Art In a portable device such as a notebook personal computer or a video camera which is driven by a battery, a main driving state in which power consumption is large and a standby state in which power consumption is extremely small as compared with the power consumption in the main driving state. As a power supply switching device for increasing the power utilization efficiency of a mounted battery and extending the life of the battery, for example, there is a power supply switching device as shown in FIG. In FIG. 5, a power supply switching device 50 includes a battery 51, a step-down switching regulator 52,
A series regulator 53, a control unit 54, and a switching unit 55 are provided.

【０００３】バッテリ５１は、正極性のバッテリ電圧Ｖ
B（Ｖ）を降圧型スイッチング・レギュレータ５２とシ
リーズ・レギュレータ５３とに出力する。The battery 51 has a positive battery voltage V
B (V) is output to the step-down switching regulator 52 and the series regulator 53.

【０００４】降圧型スイッチング・レギュレータ５２
は、バッテリ電圧ＶB（Ｖ）に基づいて新たな直流安定
化電圧ＶC（＜ＶB）を生成して切替手段５５のａ端子に
出力する。降圧型スイッチング・レギュレータ５２の電
力利用効率は、負荷消費電力が大きい場合に高く、負荷
消費電力が小さい場合に自身で消費する電力が負荷電流
の大きさによらず略一定であるので低くなる。[0004] Step-down switching regulator 52
Generates a new stabilized DC voltage VC (<VB) based on the battery voltage VB (V) and outputs it to the terminal a of the switching means 55. The power use efficiency of the step-down switching regulator 52 is high when the load power consumption is large, and is low when the load power consumption is small because the power consumed by itself is substantially constant regardless of the magnitude of the load current.

【０００５】シリーズ・レギュレータ５３は、直流安定
化電圧ＶB（Ｖ）に基づいて新たな直流安定化電圧Ｖ53
（＜ＶB）を生成して切替手段５５のｂ端子に出力す
る。シリーズ・レギュレータ５３の電力利用効率は、入
力から出力への電圧降下分が常にジュール熱として自身
で消費するので、負荷電流が小さい場合に高く、負荷電
流が大きい場合に低くなる。[0005] The series regulator 53 generates a new DC stabilized voltage V53 based on the DC stabilized voltage VB (V).
(<VB) and outputs it to the terminal b of the switching means 55. The power utilization efficiency of the series regulator 53 is high when the load current is small and low when the load current is large because the voltage drop from the input to the output always consumes itself as Joule heat.

【０００６】制御手段５４は、主駆動／待機状態信号Ｐ
Uに基づいて制御信号Ｓ54を生成して切替手段５５に出
力する。切替手段５５は、制御信号Ｓ54に基づいて、消
費電力が大きい主駆動状態時に降圧型スイッチング・レ
ギュレータ５２の直流安定化電圧ＶCを選択して負荷に
切替電圧ＶO（＝ＶC）を出力し、待機状態時にシリーズ
・レギュレータ５３の直流安定化電圧Ｖ53を選択して負
荷に切替電圧ＶO（＝Ｖ53）を出力する。The control means 54 outputs a main drive / standby state signal P
A control signal S54 is generated based on U and output to the switching means 55. The switching means 55 selects the DC stabilized voltage VC of the step-down switching regulator 52 in the main driving state where the power consumption is large based on the control signal S54, outputs the switching voltage VO (= VC) to the load, and waits. In the state, the DC stabilized voltage V53 of the series regulator 53 is selected, and the switching voltage VO (= V53) is output to the load.

【０００７】このように、電源切替装置５０は、バッテ
リ５１、降圧型スイッチング・レギュレータ５２、シリ
ーズ・レギュレータ５３、制御手段５４及び切替手段５
５を備え、負荷消費電力の大きさによって降圧型スイッ
チング・レギュレータ５２とシリーズ・レギュレータ５
３との切替を行い、携帯用電子機器に搭載されているバ
ッテリ５１の電力利用効率を高めてバッテリ５１の長寿
命化を図るものである。As described above, the power supply switching device 50 includes the battery 51, the step-down switching regulator 52, the series regulator 53, the control means 54, and the switching means 5.
5 and the step-down switching regulator 52 and the series regulator 5 according to the magnitude of the load power consumption.
3 to increase the power use efficiency of the battery 51 mounted on the portable electronic device to extend the life of the battery 51.

【０００８】[0008]

【発明が解決しようとする課題】しかしながら、従来の
電源切替装置５０には、バッテリ５１の電力利用効率を
高めるための切替出力ＶOを複数必要とする場合、複数
の降圧型スイッチング・レギュレータが必要となり、装
置が複雑化して大型となり、コスト高になるという課題
がある。However, when the conventional power supply switching device 50 requires a plurality of switching outputs VO for improving the power use efficiency of the battery 51, a plurality of step-down switching regulators are required. However, there is a problem in that the apparatus becomes complicated and large, and the cost increases.

【０００９】本発明は、上記した従来技術の課題を解決
するためになされたものであって、その目的は、負荷消
費電力に応じて電源の切替を行う電源切替装置におい
て、特に装置の複雑化、大型化なしに携帯用電子機器に
搭載されているバッテリの電力利用効率を高めてバッテ
リの長寿命化が図れる電源切替装置を提供することにあ
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a power supply switching device for switching a power supply in accordance with load power consumption, and in particular, to increase the complexity of the device. Another object of the present invention is to provide a power supply switching device capable of increasing the power use efficiency of a battery mounted on a portable electronic device without increasing the size and extending the life of the battery.

【００１０】[0010]

【課題を解決するための手段】上記課題を解決するため
に本発明に係る電源切替装置は、バッテリ電圧より低い
直流電圧を生成する直流電圧変換手段と、バッテリ電圧
と、直流電圧変換手段で生成した直流電圧とを切り替え
て定電圧手段の入力に電力供給をする切替手段と、消費
電力が大きい主駆動状態時に直流電圧変換手段で生成し
た直流電圧に切り替え、また消費電力が小さい待機状態
時にバッテリ電圧に切り替えるように切替手段を制御す
る制御手段とを備えたことを特徴とするIn order to solve the above-mentioned problems, a power supply switching device according to the present invention comprises a DC voltage converting means for generating a DC voltage lower than a battery voltage, a battery voltage, and a DC voltage converting means. Switching means for switching between the DC voltage and the power supply to the input of the constant voltage means, and switching to the DC voltage generated by the DC voltage conversion means in the main drive state where the power consumption is large, and the battery in the standby state where the power consumption is small. Control means for controlling the switching means so as to switch to the voltage.

【００１１】本発明に係る電源切替装置は、バッテリ電
圧より低い直流電圧を生成する直流電圧変換手段と、バ
ッテリ電圧と、直流電圧変換手段で生成した直流電圧と
を切り替えて定電圧手段の入力に電力供給をする切替手
段と、消費電力が大きい主駆動状態時に直流電圧変換手
段で生成した直流電圧に切り替え、また消費電力が小さ
い待機状態時にバッテリ電圧に切り替えるように切替手
段を制御する制御手段とを備えたので、簡単な構成で、
主駆動状態時の定電圧手段での電力損失を減少させるこ
とができる。[0011] A power supply switching device according to the present invention is a DC voltage conversion means for generating a DC voltage lower than a battery voltage, and switches between a battery voltage and a DC voltage generated by the DC voltage conversion means to input to a constant voltage means. Switching means for supplying power, and control means for controlling the switching means to switch to the DC voltage generated by the DC voltage conversion means during the main drive state with high power consumption and to switch to the battery voltage during the standby state with low power consumption. With a simple configuration,
Power loss in the constant voltage means in the main driving state can be reduced.

【００１２】また、本発明に係る電源切替装置は、直流
電圧変換手段に、発振手段と、発振手段からの発振出力
をパルス幅変調、又は周波数変調してバッテリ電圧より
低い所定電圧を出力する変調手段とを備えたことを特徴
とする。In the power supply switching device according to the present invention, the DC voltage converting means may include an oscillating means and a pulse width modulation or frequency modulation of an oscillation output from the oscillating means to output a predetermined voltage lower than a battery voltage. Means.

【００１３】本発明に係る電源切替装置は、直流電圧変
換手段に、発振手段と、発振手段からの発振出力をパル
ス幅変調、又は周波数変調してバッテリ電圧より低い所
定電圧を出力する変調手段とを備えたので、これにより
直流電圧変換手段の出力する直流電圧をバッテリ電圧よ
り低い所定電圧値に安定に保つことができると共に、定
電圧手段での電力損失を減少させることができ、また待
機状態時に発振手段及び変調手段の消費電力を零にする
ことができる。In the power supply switching device according to the present invention, the DC voltage converting means includes an oscillating means and a modulating means for outputting a predetermined voltage lower than a battery voltage by pulse width modulation or frequency modulation of the oscillation output from the oscillating means. Therefore, the DC voltage output from the DC voltage conversion means can be stably maintained at a predetermined voltage value lower than the battery voltage, and the power loss in the constant voltage means can be reduced. Sometimes, the power consumption of the oscillation means and the modulation means can be reduced to zero.

【００１４】[0014]

【発明の実施の形態】本発明の実施の形態を添付図面に
基づいて以下に説明する。図１は本発明に係る電源切替
装置の第１の実施形態の要部ブロック構成図である。図
１において、本発明に係る電源切替装置１は、バッテリ
１０、降圧型ＤＣ／ＤＣコンバータ１１、制御手段１
２、切替手段１３、コンデンサ１４及びシリーズ・レギ
ュレータ１５を備える。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of a main part of a first embodiment of a power supply switching device according to the present invention. In FIG. 1, a power supply switching device 1 according to the present invention includes a battery 10, a step-down DC / DC converter 11, and a control unit 1.
2, a switching unit 13, a capacitor 14, and a series regulator 15.

【００１５】バッテリ１０は、正極性のバッテリ電圧Ｖ
Bを降圧型ＤＣ／ＤＣコンバータ１１と切替手段１３の
端子ｂとに出力する。The battery 10 has a positive battery voltage V
B is output to the step-down DC / DC converter 11 and the terminal b of the switching means 13.

【００１６】降圧型ＤＣ／ＤＣコンバータ１１は、バッ
テリ電圧ＶBから電圧変換して新たな直流電圧を作る直
流電圧変換手段であり、バッテリ電圧ＶBより低く、且
つ後述するシリーズ・レギュレータ（１５Ａ〜１５Ｎ）
の直流安定化電圧（Ｖ15A〜Ｖ15N）より高い直流電圧を
生成して得られるコンバータ電圧ＶC（Ｖ15＜ＶC＜Ｖ
B）を切替手段１３のａ端子に出力する。The step-down DC / DC converter 11 is a DC voltage converting means for converting the battery voltage VB to generate a new DC voltage, and is lower than the battery voltage VB and a series regulator (15A to 15N) to be described later.
Converter voltage VC (V15 <VC <V) obtained by generating a DC voltage higher than the DC stabilized voltage (V15A to V15N)
B) is output to the terminal a of the switching means 13.

【００１７】制御手段１２は、主駆動／待機状態信号Ｐ
Uに基づいて制御信号を生成して得られる制御信号Ｓ12
を降圧型ＤＣ／ＤＣコンバータ１１と切替手段１３とに
出力する。降圧型ＤＣ／ＤＣコンバータ１１は、制御信
号Ｓ12に基づいて主駆動状態時に動作し、待機状態時に
動作を止める。The control means 12 outputs a main drive / standby state signal P
A control signal S12 obtained by generating a control signal based on U
To the step-down DC / DC converter 11 and the switching means 13. The step-down DC / DC converter 11 operates in the main driving state based on the control signal S12, and stops operating in the standby state.

【００１８】切替手段１３は、制御信号Ｓ12に基づいて
消費電力が大きい主駆動状態時に端子ａに出力されてい
るコンバータ電圧ＶCに切り替えて端子ｃに得られる切
替電圧ＶO1（＝ＶC）をシリーズ・レギュレータ（１５
Ａ〜１５Ｎ）に出力する。切替手段１３は、制御信号Ｓ
12に基づいて消費電力が小さい待機状態時に端子ｂに出
力されているバッテリ電圧ＶBに切り替えて端子ｃに得
られる切替電圧ＶO1（＝ＶB）をシリーズ・レギュレー
タ（１５Ａ〜１５Ｎ）に出力する。The switching means 13 switches the converter voltage VC output to the terminal a in the main driving state consuming a large amount of power based on the control signal S12 and converts the switching voltage VO1 (= VC) obtained at the terminal c into a series voltage. Regulator (15
A to 15N). The switching means 13 outputs the control signal S
Based on 12, the battery voltage is switched to the battery voltage VB output to the terminal b in the standby state with low power consumption, and the switching voltage VO1 (= VB) obtained at the terminal c is output to the series regulators (15A to 15N).

【００１９】切替手段１３の端子ｃに接続されているコ
ンデンサ１４は、切替手段１３の切替動作時に端子ｃが
端子ａまたは端子ｂの何れにも接続していない状態に生
じる切替電圧ＶO1の瞬断を防止するためのものである。The capacitor 14 connected to the terminal c of the switching means 13 causes an instantaneous interruption of the switching voltage VO1 caused when the terminal c is not connected to either the terminal a or the terminal b during the switching operation of the switching means 13. It is for preventing.

【００２０】定電圧手段であるシリーズ・レギュレータ
（１５Ａ〜１５Ｎ）は、切替電圧ＶO1から夫々の負荷が
必要とする安定した直流電圧を生成して得られる直流安
定化電圧（Ｖ15A〜Ｖ15N）を出力する。シリーズ・レギ
ュレータ１５での電力損失は、シリーズ・レギュレータ
の入力電圧（切替電圧ＶO1）と出力電圧（直流安定化電
圧Ｖ15）との差電圧である電圧降下分と負荷への供給電
流の積が常にジュール熱としてシリーズ・レギュレータ
自身で消費するので、負荷電流が小さい場合に小さく、
負荷電流が大きい場合に大きくなる。The series regulators (15A to 15N) serving as constant voltage means output stabilized DC voltages (V15A to V15N) obtained by generating stable DC voltages required by respective loads from the switching voltage VO1. I do. The power loss in the series regulator 15 is always the product of the voltage drop, which is the voltage difference between the input voltage (switching voltage VO1) and the output voltage (the stabilized DC voltage V15) of the series regulator, and the current supplied to the load. Since the series regulator itself consumes it as Joule heat, it is small when the load current is small,
It becomes large when the load current is large.

【００２１】電力切替装置１は、消費電力が大きい主駆
動状態時に、シリーズ・レギュレータ（１５Ａ〜１５
Ｎ）の入力に切替手段１３を介してバッテリ電圧ＶBよ
り低いコンバータ電圧ＶCを供給し、シリーズ・レギュ
レータの入出力間の電圧降下分を小さくしてシリーズ・
レギュレータ自身での電力損失を少なく押さえる。The power switching device 1 operates in a series regulator (15A to 15A) in the main driving state where power consumption is large.
A converter voltage VC lower than the battery voltage VB is supplied to the input of N) through the switching means 13 to reduce the voltage drop between the input and output of the series regulator to reduce the series voltage.
Reduces the power loss in the regulator itself.

【００２２】降圧型ＤＣ／ＤＣコンバータ１１自身での
電力損失は、負荷電流の大きさによらず略一定であるの
で、消費電力が小さい待機状態時にシリーズ・レギュレ
ータ（１５Ａ〜１５Ｎ）自身での電力損失より大きくな
る。Since the power loss of the step-down DC / DC converter 11 itself is substantially constant irrespective of the magnitude of the load current, the power consumption of the series regulators (15A to 15N) itself during the standby state where the power consumption is small is small. Greater than the loss.

【００２３】それ故、電力切替装置１は、消費電力が小
さい待機状態時に、降圧型ＤＣ／ＤＣコンバータ１１の
動作を止めて降圧型ＤＣ／ＤＣコンバータ１１自身での
電力損失を零にし、シリーズ・レギュレータ（１５Ａ〜
１５Ｎ）の入力に切替手段１３を介してバッテリ電圧Ｖ
Bを供給してシリーズ・レギュレータ（１５Ａ〜１５
Ｎ）を駆動し、装置全体での電力損失を少なくする。Therefore, in the standby state where the power consumption is small, the power switching device 1 stops the operation of the step-down DC / DC converter 11 to reduce the power loss in the step-down DC / DC converter 11 itself to zero. Regulator (15A ~
15N) via the switching means 13 to the battery voltage V
B to supply a series regulator (15A ~ 15
N) to reduce power loss in the entire apparatus.

【００２４】このように、本発明に係る電源切替装置１
は、バッテリ１０、降圧型ＤＣ／ＤＣコンバータ１１、
制御手段１２、切替手段１３、コンデンサ１４及びシリ
ーズ・レギュレータ１５を備えてバッテリ１０の電力利
用効率を高めることができる。As described above, the power supply switching device 1 according to the present invention
Is a battery 10, a step-down DC / DC converter 11,
The control device 12, the switching device 13, the capacitor 14, and the series regulator 15 can increase the power use efficiency of the battery 10.

【００２５】図２は本発明に係る電源切替装置の第２の
実施形態の要部ブロック構成図、図３は図２に示した電
源切替装置において主駆動状態を模式的に示した図、図
４は図２に示した電源切替装置において待機状態を模式
的に示した図である。図２において、本発明に係る電源
切替装置２は、バッテリ１０、降圧型ＤＣ／ＤＣコンバ
ータ２０及びシリーズ・レギュレータ１５を備える。FIG. 2 is a block diagram showing a main part of a second embodiment of the power supply switching device according to the present invention. FIG. 3 is a diagram schematically showing a main driving state of the power supply switching device shown in FIG. FIG. 4 is a diagram schematically showing a standby state in the power supply switching device shown in FIG. 2, the power supply switching device 2 according to the present invention includes a battery 10, a step-down DC / DC converter 20, and a series regulator 15.

【００２６】また、直流電圧変換手段である降圧型ＤＣ
／ＤＣコンバータ２０は、切替手段２１、切替手段２
２、ＮＯＴ回路２３とＮＯＲ回路２４とから成る論理手
段３０、発振手段２５、変調手段２６及びダイオード２
７とチョークコイル２８とコンデンサ２９とから成る平
滑手段３１を備える。また、定電圧手段であるシリーズ
・レギュレータ１５は、シリーズ・レギュレータ１５Ａ
〜シリーズ・レギュレータ１５Ｎから成る。Also, a step-down type DC which is a DC voltage converting means
/ DC converter 20 includes switching means 21 and switching means 2
2. Logic means 30 comprising NOT circuit 23 and NOR circuit 24, oscillating means 25, modulating means 26 and diode 2.
And a smoothing means 31 comprising a choke coil 28 and a capacitor 29. The series regulator 15 as a constant voltage means is a series regulator 15A.
~ Consisting of a series regulator 15N.

【００２７】降圧型ＤＣ／ＤＣコンバータ２０の制御端
子Ｔ2に入力する主駆動／待機状態信号ＰUは、主駆動状
態時に論理値１とし、待機状態時に論理値０とする。主
駆動／待機状態信号ＰUは、論理手段３０のＮＯＴ回路
２３に入力される。The main drive / standby state signal PU input to the control terminal T2 of the step-down DC / DC converter 20 has a logical value of 1 during the main drive state and a logical value of 0 during the standby state. The main drive / standby state signal PU is input to the NOT circuit 23 of the logic means 30.

【００２８】まず、消費電力が大きい主駆動状態時の電
力切替装置２の動作状態を説明する。論理手段３０のＮ
ＯＴ回路２３は、主駆動／待機状態信号ＰU（＝１）に
基づいて生成して得られる切替制御信号Ｓ23（＝０）を
切替手段２１に出力する。切替手段２１は、切替制御信
号Ｓ23（＝０）によってオン駆動され、その結果、発振
手段２５と変調手段２６とに降圧型ＤＣ／ＤＣコンバー
タ２０の入力端子Ｔ1に印加されているバッテリ１０の
バッテリ電圧ＶBを供給する。First, an operation state of the power switching device 2 in a main driving state in which power consumption is large will be described. N of logic means 30
The OT circuit 23 outputs a switching control signal S23 (= 0) generated based on the main drive / standby state signal PU (= 1) to the switching unit 21. The switching means 21 is turned on by the switching control signal S23 (= 0). As a result, the battery 10 of the battery 10 applied to the input terminal T1 of the step-down DC / DC converter 20 is supplied to the oscillation means 25 and the modulation means 26. Supply voltage VB.

【００２９】発振手段２５は、切替手段２１を介してバ
ッテリ電圧ＶBの供給を受けて動作状態になり、発振信
号Ｓ25を変調手段２６に出力する。変調手段２６は、切
替手段２１を介してバッテリ電圧ＶBの供給を受けて動
作状態になり、降圧型ＤＣ／ＤＣコンバータ２０の出力
端子Ｔ3のコンバータ電圧ＶO2に基づいて発振信号Ｓ25
をパルス幅変調又は周波数変調して得られる制御信号Ｓ
26をＮＯＲ回路２４に出力する。The oscillating unit 25 receives the supply of the battery voltage VB via the switching unit 21 and enters an operating state, and outputs an oscillating signal S25 to the modulating unit 26. The modulating means 26 is activated by receiving the supply of the battery voltage VB via the switching means 21, and based on the converter voltage VO2 of the output terminal T3 of the step-down DC / DC converter 20, the oscillation signal S25
Control signal S obtained by performing pulse width modulation or frequency modulation on
26 is output to the NOR circuit 24.

【００３０】ＮＯＲ回路２４は、主駆動／待機状態信号
ＰU（＝１）と制御信号Ｓ26とに基づいて生成して得ら
れる切替制御信号Ｓ24を切替手段２２に出力する。切替
手段２２は、切替制御信号Ｓ24によってオン／オフ駆動
され、その結果、降圧型ＤＣ／ＤＣコンバータ２０の入
力端子Ｔ1に印加されているバッテリ１０のバッテリ電
圧ＶBをスイチングしたスイッチング電圧Ｖ22を平滑手
段３１に出力する。The NOR circuit 24 outputs a switching control signal S24 generated based on the main drive / standby state signal PU (= 1) and the control signal S26 to the switching means 22. The switching means 22 is turned on / off by the switching control signal S24. As a result, the switching means 22 smoothes the switching voltage V22 obtained by switching the battery voltage VB of the battery 10 applied to the input terminal T1 of the step-down DC / DC converter 20. 31.

【００３１】平滑手段３１は、チョークコイル２８とコ
ンデンサ２９とによってスイッチング電圧Ｖ22を平滑し
て得られる安定化された直流電圧であるコンバータ電圧
ＶO2を出力端子Ｔ3を介して定電圧手段であるシリーズ
・レギュレータ（１５Ａ〜１５Ｎ）に出力する。直流電
圧であるコンバータ電圧ＶO2は、バッテリ電圧ＶBより
低く、且つシリーズ・レギュレータ（１５Ａ〜１５Ｎ）
の出力電圧（Ｖ15A〜Ｖ15N）より高い電圧である。The smoothing means 31 converts the converter voltage VO2, which is a stabilized DC voltage obtained by smoothing the switching voltage V22 by the choke coil 28 and the capacitor 29, through the output terminal T3 into a series voltage, which is a constant voltage means. Output to regulators (15A to 15N). The converter voltage VO2 which is a DC voltage is lower than the battery voltage VB and a series regulator (15A to 15N)
Is higher than the output voltage (V15A to V15N).

【００３２】そして、上記した電源切替装置２の主駆動
状態を図３の模式的に示すと、降圧型ＤＣ／ＤＣコンバ
ータ２０は、バッテリ１０と定電圧手段であるシリーズ
・レギュレータ（１５Ａ〜１５Ｎ）との間に挿入され、
シリーズ・レギュレータ（１５Ａ〜１５Ｎ）にコンバー
タ電圧ＶO2を出力する。FIG. 3 schematically shows the main driving state of the power supply switching device 2 described above. The step-down DC / DC converter 20 includes a battery 10 and a series regulator (15A to 15N) serving as a constant voltage means. Inserted between
The converter voltage VO2 is output to the series regulator (15A to 15N).

【００３３】次に、消費電力が小さい待機状態時の電力
切替装置２の動作状態を説明する。論理手段３０のＮＯ
Ｔ回路２３は、主駆動／待機状態信号ＰU（＝０）に基
づいて生成して得られる切替制御信号Ｓ23（＝１）を切
替手段２１に出力する。切替手段２１は、切替制御信号
Ｓ23（＝１）によってオフ駆動され、その結果、降圧型
ＤＣ／ＤＣコンバータ２０の入力端子Ｔ1に印加されて
いるバッテリ１０のバッテリ電圧ＶBの発振手段２５及
び変調手段２６への供給を切って発振手段２５及び変調
手段２６での消費電力を零にする。Next, an operation state of the power switching device 2 in a standby state with small power consumption will be described. NO of logic means 30
The T circuit 23 outputs to the switching means 21 a switching control signal S23 (= 1) obtained and generated based on the main drive / standby state signal PU (= 0). The switching means 21 is driven off by the switching control signal S23 (= 1). As a result, the oscillation means 25 and the modulation means for the battery voltage VB of the battery 10 applied to the input terminal T1 of the step-down DC / DC converter 20 The power supply to the oscillating means 25 and the modulating means 26 is turned off by turning off the supply to the oscillating means 25 and the modulating means 26.

【００３４】ＮＯＲ回路２４は、主駆動／待機状態信号
ＰU（＝０）と制御信号Ｓ26（＝０）とに基づいて生成
して得られる切替制御信号Ｓ24（＝１）を切替手段２２
に出力する。The NOR circuit 24 outputs a switching control signal S24 (= 1) obtained based on the main driving / standby state signal PU (= 0) and the control signal S26 (= 0) to the switching means 22.
Output to

【００３５】切替手段２２は、切替制御信号Ｓ24（＝
１）によってオン駆動され、その結果、降圧型ＤＣ／Ｄ
Ｃコンバータ２０の入力端子Ｔ1に印加されているバッ
テリ１０のバッテリ電圧ＶBを平滑手段３１を介してシ
リーズ・レギュレータ（１５Ａ〜１５Ｎ）に出力する。The switching means 22 outputs a switching control signal S24 (=
1), and as a result, the step-down DC / D
The battery voltage VB of the battery 10 applied to the input terminal T1 of the C converter 20 is output to the series regulators (15A to 15N) via the smoothing means 31.

【００３６】平滑手段３１は、待機状態時に切替手段２
２から出力されるバッテリ電圧ＶBを平滑すると共に、
主駆動状態／待機状態の切替時の降圧型ＤＣ／ＤＣコン
バータ２０の出力電圧ＶO2の瞬断を防止する。そして、
上記した電源切替装置２の待機状態を図４に模式的に示
すと、降圧型ＤＣ／ＤＣコンバータ２０は、バッテリ１
０のバッテリ電圧ＶBを定電圧手段であるシリーズ・レ
ギュレータ（１５Ａ〜１５Ｎ）に出力する。The smoothing means 31 switches the switching means 2 during the standby state.
2 to smooth the battery voltage VB output from
The instantaneous interruption of the output voltage VO2 of the step-down DC / DC converter 20 at the time of switching between the main drive state and the standby state is prevented. And
FIG. 4 schematically shows the standby state of the power supply switching device 2 described above. The step-down DC / DC converter 20 includes a battery 1
The battery voltage VB of 0 is output to a series regulator (15A to 15N) which is a constant voltage means.

【００３７】このように、電源切替装置２は、バッテリ
１０と、シリーズ・レギュレータ１５と、切替手段２
１、切替手段２２、ＮＯＴ回路２３、ＮＯＲ回路２４、
発振手段２５、変調手段２６、ダイオード２７、チョー
クコイル２８及びコンデンサ２９を有してなる降圧型Ｄ
Ｃ／ＤＣコンバータ２０とを備えたので、降圧型ＤＣ／
ＤＣコンバータ２０をバッテリ１０とシリーズ・レギュ
レータ１５との間に介在し、降圧型ＤＣ／ＤＣコンバー
タ２０のコンバータ電圧ＶO2をバッテリ電圧ＶBより低
い所定電圧値に安定に保ち、定電圧手段での電力損失を
減少させることができ、また待機状態時の発振手段及び
変調手段の消費電力を零にすることができ、さらに降圧
型ＤＣ／ＤＣコンバータ２０の出力電圧ＶO2を瞬断する
ことなく主駆動状態と待機状態との自動切替ができる。As described above, the power supply switching device 2 includes the battery 10, the series regulator 15,
1, switching means 22, NOT circuit 23, NOR circuit 24,
Step-down type D comprising an oscillating means 25, a modulating means 26, a diode 27, a choke coil 28 and a capacitor 29
With the C / DC converter 20, the step-down DC / DC converter
The DC converter 20 is interposed between the battery 10 and the series regulator 15 to stably maintain the converter voltage VO2 of the step-down DC / DC converter 20 at a predetermined voltage value lower than the battery voltage VB, and to reduce power loss in the constant voltage means. Can be reduced, the power consumption of the oscillating means and the modulating means in the standby state can be reduced to zero, and the output voltage VO2 of the step-down DC / DC converter 20 can be changed to the main driving state without momentary interruption. Automatic switching to the standby state is possible.

【００３８】[0038]

【発明の効果】本発明は上記構成により次の効果を発揮
する。本発明に係る電源切替装置は、バッテリ電圧より
低い直流電圧を生成する降圧型ＤＣ／ＤＣコンバータ
と、バッテリ電圧または降圧型ＤＣ／ＤＣコンバータで
生成した直流電圧に切り替えてシリーズ・レギュレータ
の入力に電力供給をする切替手段と、消費電力が大きい
主駆動状態時に降圧型ＤＣ／ＤＣコンバータで生成した
直流電圧に切り替え、また消費電力が小さい待機状態時
にバッテリ電圧に切り替えるように切替手段を制御する
制御手段とを備え、簡単な構成で、主駆動状態時のシリ
ーズ・レギュレータでの電力損失を減少させることがで
きるので、装置の小型化が図れ、またバッテリの電力利
用効率を高めてバッテリの長寿命化が図れ、且つ携帯機
器に搭載されるバッテリを小型化することができる。According to the present invention, the following effects are exhibited by the above configuration. A power supply switching device according to the present invention includes a step-down DC / DC converter that generates a DC voltage lower than a battery voltage, and a DC voltage generated by a battery voltage or a step-down DC / DC converter. Switching means for supplying power, and control means for controlling the switching means to switch to a DC voltage generated by a step-down DC / DC converter in a main drive state where power consumption is large and to switch to a battery voltage in a standby state where power consumption is small. With a simple configuration, it is possible to reduce power loss in the series regulator in the main drive state, so that the size of the device can be reduced, and the power usage efficiency of the battery can be increased to extend the life of the battery. And the size of the battery mounted on the portable device can be reduced.

【００３９】本発明に係る電源切替装置は、降圧型ＤＣ
／ＤＣコンバータに、発振手段と、発振手段からの発振
出力をパルス幅変調、又は周波数変調してバッテリ電圧
より低い所定電圧を出力する変調手段とを備え、降圧型
ＤＣ／ＤＣコンバータの出力する直流電圧をバッテリ電
圧より低い所定電圧値に安定に保つことができるので、
主駆動状態時のシリーズ・レギュレータでの電力損失を
確実により減少させることができ、信頼性の向上と、携
帯機器に搭載したバッテリの電力利用効率を高めてより
バッテリの長寿命化が図れる。The power supply switching device according to the present invention is a step-down DC
A DC / DC converter, comprising: an oscillating means; and a modulating means for pulse width modulation or frequency modulation of an oscillation output from the oscillating means to output a predetermined voltage lower than a battery voltage. Since the voltage can be stably maintained at a predetermined voltage value lower than the battery voltage,
The power loss in the series regulator in the main drive state can be reliably reduced, and the reliability can be improved, and the power use efficiency of the battery mounted on the portable device can be increased to extend the life of the battery.

【００４０】よって、本発明は、バッテリの小型化、バ
ッテリの長寿命化が図れ、経済的で、信頼性の高い電源
切替装置を提供することができる。Therefore, according to the present invention, it is possible to provide an economical and highly reliable power supply switching device which can reduce the size of the battery and extend the life of the battery.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明に係る電源切替装置の第１の実施形態の
要部ブロック構成図FIG. 1 is a block diagram of a main part of a first embodiment of a power supply switching device according to the present invention.

【図２】本発明に係る電源切替装置の第２の実施形態の
要部ブロック構成図FIG. 2 is a block diagram of a main part of a second embodiment of the power supply switching device according to the present invention.

【図３】本発明に係る電力切替装置２の主駆動状態時の
説明図FIG. 3 is an explanatory diagram in a main driving state of the power switching device 2 according to the present invention.

【図４】本発明に係る電源切替装置２の待機状態時の説
明図FIG. 4 is an explanatory diagram of the power supply switching device 2 according to the present invention in a standby state.

【図５】電源切替装置の要部ブロック構成図FIG. 5 is a block diagram of a main part of the power supply switching device.

【符号の説明】[Explanation of symbols]

１，２…電源切替装置、１０…バッテリ、１１，２０…
降圧型ＤＣ／ＤＣコンバータ、１２…制御手段、１３…
切替手段、１４…コンデンサ、１５，１５Ａ〜１５Ｎ…
シリーズ・レギュレータ、２１…切替手段、２２…切替
手段、２３…ＮＯＴ回路、２４…ＮＯＲ回路、２５…発
振手段、２６…変調手段、２７…ダイオード、２８…チ
ョークコイル、２９…コンデンサ、３０…論理手段、３
１…平滑手段、ａ，ｂ，ｃ…端子、ＰU…主駆動／待機
状態信号、Ｓ12…制御信号、Ｓ24…切替制御信号、Ｓ25
…発振信号、Ｓ26…制御信号、ＶO1…切替電圧、ＶO2…
コンバータ電圧、Ｖ15A〜Ｖ15N…直流安定化電圧、Ｖ22
…スイッチング電圧、ＶB…バッテリ電圧、ＶC…コンバ
ータ電圧、Ｔ1…入力端子、Ｔ2…制御端子、Ｔ3…出力
端子。1, 2, power supply switching device, 10, battery, 11, 20, ...
Step-down DC / DC converter, 12 ... control means, 13 ...
Switching means, 14: condenser, 15, 15A to 15N ...
Series regulator, 21 switching means, 22 switching means, 23 NOT circuit, 24 NOR circuit, 25 oscillation means, 26 modulation means, 27 diode, 28 choke coil, 29 capacitor, 30 logic Means, 3
1: smoothing means, a, b, c terminals, PU: main drive / standby state signal, S12: control signal, S24: switching control signal, S25
... Oscillation signal, S26 ... Control signal, VO1 ... Switching voltage, VO2 ...
Converter voltage, V15A to V15N: DC stabilized voltage, V22
... switching voltage, VB ... battery voltage, VC ... converter voltage, T1 ... input terminal, T2 ... control terminal, T3 ... output terminal.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 携帯機器に搭載したバッテリと、少なく
とも一つ以上の定電圧手段とを有する電源切替装置にお
いて、 前記バッテリ電圧より低い直流電圧を生成する直流電圧
変換手段と、 前記バッテリ電圧と、前記直流電圧変換手段で生成した
直流電圧とを切り替えて前記定電圧手段の入力に電力供
給をする切替手段と、 消費電力が大きい主駆動状態時に前記直流電圧変換手段
で生成した直流電圧に切り替え、また消費電力が小さい
待機状態時に前記バッテリ電圧に切り替えるように前記
切替手段を制御する制御手段と、を備えたことを特徴と
する電源切替装置。1. A power supply switching device having a battery mounted on a portable device and at least one or more constant voltage means, comprising: a DC voltage conversion means for generating a DC voltage lower than the battery voltage; Switching means for switching the DC voltage generated by the DC voltage conversion means to supply power to the input of the constant voltage means, and switching to the DC voltage generated by the DC voltage conversion means in a main drive state where power consumption is large; And a control unit for controlling the switching unit so as to switch to the battery voltage in a standby state with low power consumption. 【請求項２】 前記直流電圧変換手段は、 発振手段と、 前記発振手段からの発振出力をパルス幅変調、又は周波
数変調して前記バッテリ電圧より低い所定電圧を出力す
る変調手段と、を備えたことを特徴とする請求項１記載
の電源切替装置。2. The direct-current voltage converting means includes: an oscillating means; and a modulating means for pulse-width-modulating or frequency-modulating an oscillation output from the oscillating means to output a predetermined voltage lower than the battery voltage. The power supply switching device according to claim 1, wherein:
JP9188810A 1997-07-14 1997-07-14 Power source switch device Pending JPH1141825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9188810A JPH1141825A (en) 1997-07-14 1997-07-14 Power source switch device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9188810A JPH1141825A (en) 1997-07-14 1997-07-14 Power source switch device

Publications (1)

Publication Number Publication Date
JPH1141825A true JPH1141825A (en) 1999-02-12

Family

ID=16230216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9188810A Pending JPH1141825A (en) 1997-07-14 1997-07-14 Power source switch device

Country Status (1)

Country Link
JP (1) JPH1141825A (en)

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