JPH03118758A - Dc power supply device - Google Patents
Dc power supply deviceInfo
- Publication number
- JPH03118758A JPH03118758A JP25412389A JP25412389A JPH03118758A JP H03118758 A JPH03118758 A JP H03118758A JP 25412389 A JP25412389 A JP 25412389A JP 25412389 A JP25412389 A JP 25412389A JP H03118758 A JPH03118758 A JP H03118758A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- battery
- circuit
- boosting
- power supply
- 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 abstract description 10
- 239000003990 capacitor Substances 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910005580 NiCd Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電池を電源とする装置の直流電源装置に関し、
特に低電圧の電池の電圧を昇圧し、安定化させて出力す
る直流電源装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a DC power supply device for a device using a battery as a power source,
In particular, the present invention relates to a DC power supply device that boosts, stabilizes, and outputs the voltage of a low-voltage battery.
従来この種の直流電源装置は、電池の電圧を昇圧用ＩＣ
を用いて固定した整数倍の電圧に昇圧し、レギュレータ
を用いて安定化させ、装置の動作に必要な電圧を得てい
る。Conventionally, this type of DC power supply device uses an IC to boost the battery voltage.
The voltage is boosted to a fixed integer multiple using a regulator and stabilized using a regulator to obtain the voltage necessary for the operation of the device.
出力電圧として、例えば＋５■を得る場合に、１．２■
のＮｉＣｄ電池を３個直列にした３、６■の電池を使用
した場合には、昇圧回路で２倍に昇圧し、レギュレータ
にて＋５Ｖに減圧して出力電圧を得ていた。For example, when obtaining +5■ as the output voltage, 1.2■
When using a 3.6-inch battery consisting of three NiCd batteries connected in series, the output voltage was obtained by doubling the voltage with a booster circuit and reducing the voltage to +5V with a regulator.
上述した従来の直流電源装置は、昇圧回路の昇圧倍率が
固定になっているので、電池の電圧が低下してきた場合
に、充分な出力電圧が得られなくなるという欠点がある
。また、最初から昇圧の倍率を高くしておけば電池の残
量が充分にある場合には必要以上の電圧に昇圧され、こ
れをレギュレータで減圧するため、電圧変換効率が悪く
なり、結局電池寿命が短かくなるという欠点がある。In the above-described conventional DC power supply device, since the boosting magnification of the boosting circuit is fixed, there is a drawback that a sufficient output voltage cannot be obtained when the battery voltage decreases. In addition, if the voltage boosting factor is set high from the beginning, if the battery has sufficient remaining capacity, the voltage will be boosted to a higher voltage than necessary, and this will be reduced by the regulator, which will reduce the voltage conversion efficiency and ultimately reduce the battery life. The disadvantage is that it is shorter.
本発明の直流電源装置は、電池の電圧を昇圧回路により
整数倍に昇圧して必要とする電圧を安定化させて出力す
る直流電源装置において、前記電池の電圧の低下を検出
する低電圧検出回路と、この低電圧検出回路の出力状態
により前記昇圧回路の昇圧の倍率を可変する切替え回路
とを有している。The DC power supply device of the present invention is a DC power supply device that boosts the voltage of a battery by an integer multiple using a booster circuit to stabilize and output a required voltage, and a low voltage detection circuit that detects a drop in the voltage of the battery. and a switching circuit that varies the boosting factor of the booster circuit depending on the output state of the low voltage detection circuit.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
第１図において、本実施例の直流電源装置は電池１と、
電池１の予め設定された低電圧を検出する低電圧検出回
路２と、ダイオードＤＩ ＋ Ｄ２ ＋Ｄ３およびコン
デンサＣ，，Ｃ２，Ｃ３によって電池１の出力を２倍、
３倍に昇圧させる昇圧回路４と、昇圧回路４の昇圧値を
切替える切替え回路３と、昇圧された電圧を安定化して
＋５ｖの直流電圧を出力するレギュレータ５とを有して
構成している。In FIG. 1, the DC power supply device of this embodiment includes a battery 1,
A low voltage detection circuit 2 detects a preset low voltage of the battery 1, and the output of the battery 1 is doubled by the diodes DI + D2 + D3 and capacitors C, , C2, and C3.
It includes a booster circuit 4 that boosts the voltage three times, a switching circuit 3 that switches the boost value of the booster circuit 4, and a regulator 5 that stabilizes the boosted voltage and outputs a +5V DC voltage.
次に、本実施例の動作について説明する。Next, the operation of this embodiment will be explained.
電池１の電圧は３．６Ｖとする。この３．６Ｖの電圧を
昇圧回路４を用いて昇圧させる。昇圧の倍率は昇圧回路
４に接続するコンデンサＣ１，Ｃ２Ｃ５とダイオードＤ
１．Ｄ２．Ｄ３とによって２倍、３倍に設定できるよう
になっており、２倍昇圧の場合にはダイオードＤ、、Ｄ
２とコンデンサＣ，，Ｃ，を用い、３倍昇圧の場合には
ダイオードＤ、、Ｄ２．Ｄ３とコンデンサＣＩ 、 Ｃ
２Ｃ５とを用い、これらの接続切替えを切替え回路３に
よって選択する。The voltage of battery 1 is 3.6V. This voltage of 3.6V is boosted using a booster circuit 4. The boosting factor is determined by capacitors C1, C2C5 and diode D connected to booster circuit 4.
1. D2. It is possible to set the voltage to 2x or 3x by D3, and in the case of 2x boosting, diodes D, D
2 and capacitors C, , C, and in the case of triple boosting, diodes D, , D2 . D3 and capacitor CI, C
2C5, and these connection switches are selected by the switching circuit 3.
切替え回路３のスイッチをａ側に接続すると、ダイオー
ドＤ３は短絡し、コンデンサＣ２は解放となるので２倍
昇圧が設定され、切替え回路３のスイッチをｂ側に接続
するとダイオードＤ３とコンデンサＣ２とが昇圧回路４
に接続されて３倍昇圧に設定される。When the switch of the switching circuit 3 is connected to the a side, the diode D3 is short-circuited and the capacitor C2 is released, so a double boost is set. When the switch of the switching circuit 3 is connected to the b side, the diode D3 and the capacitor C2 are connected. Boost circuit 4
The voltage is set to 3 times higher by connecting it to .
２倍昇圧に切替え回路３が設定された場合には、昇圧後
の電圧は、
電池電圧×２−（ダイオードＤｌ、Ｄ２の降下電圧）と
なる、（図中Ａ点）
この昇圧電圧をレギュレータ５にて出力電圧＋５ｖに安
定化させるが、レギュレータ５を動作させるためには入
力電圧として５．４Ｖ以上必要なので、例えば、ダイオ
ード１個分の降下電圧を０．６Ｖとすると、電池の電圧
は
電池電圧×２≧５．４ ＋ ０．６ Ｘ ２ ＝ ６．
６から、３．３Ｖ以上必要となる。When the switching circuit 3 is set to double boosting, the voltage after boosting is the battery voltage x 2 - (dropped voltage of diodes Dl and D2) (point A in the figure). This boosted voltage is transferred to the regulator 5. The output voltage is stabilized at +5V, but in order to operate the regulator 5, the input voltage needs to be 5.4V or more.For example, if the voltage drop of one diode is 0.6V, the battery voltage will be Voltage x 2 ≧ 5.4 + 0.6 X 2 = 6.
6, 3.3V or more is required.
したがって、低電圧検出回路２は３．３Ｖを検出するよ
うに設定し、これ以上の電圧であれば切替え回路３のス
イッチをａ側に接続して２倍昇圧とし、３．３Ｖ以下に
なった場合には、切替え回路３のスイッチをｂ側に切替
えて３倍昇圧にする。３倍昇圧の場合の昇圧回路４の出
力電圧は電池電圧ｘ３ ［）、、Ｄ２ 、Ｄ３の電圧
降下分（０，６Ｘ ３ ）となり、
レギュータ５の動作に必要な５．４■を得るには電池電
圧は２．４■あればよいことになる。（２４Ｘ ３−０
．６ ｘ ３ ＝ ５．４ ）即ち、本実施例は電池１
の電圧が２４Ｖに降下しても使用することができる。Therefore, the low voltage detection circuit 2 is set to detect 3.3V, and if the voltage is higher than this, the switch of the switching circuit 3 is connected to the a side to double the voltage, and the voltage is below 3.3V. In this case, the switch of the switching circuit 3 is switched to the b side to boost the voltage three times. In the case of triple boosting, the output voltage of the booster circuit 4 is the voltage drop of the battery voltage x3[), D2, and D3 (0,6X3), and in order to obtain the 5.4■ required for the operation of the regulator 5, The battery voltage should be 2.4 ■. (24X 3-0
．． 6 x 3 = 5.4) That is, in this example, battery 1
It can be used even if the voltage drops to 24V.
以上のように本発明は、電池の出力電圧に応じて電池の
昇圧の倍率を可変できるようにすることにより、従来よ
り電圧の変換効率を高くすることができ、しかも、電池
の使用できる電圧範囲を幅広くとることができて従来よ
り電池の寿命を長くすることができる効果がある。As described above, the present invention makes it possible to make the voltage conversion efficiency higher than before by making it possible to vary the boosting factor of the battery according to the output voltage of the battery, and furthermore, it is possible to increase the voltage conversion efficiency within the usable voltage range of the battery. This has the effect of extending the life of the battery compared to the conventional method.
第１図は本発明の一実施例を示すブロック図である。
１・・・電池、２・・・低電圧検出回路、３・・・切替
え回路、４・・・昇圧回路、５・・・レギュレータ、Ｄ
ｌ、Ｄ２、Ｄ３・・・ダイオード、Ｃ！、Ｃ２、Ｃｓ・
・・コンデンサ。FIG. 1 is a block diagram showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Battery, 2...Low voltage detection circuit, 3...Switching circuit, 4...Boost circuit, 5...Regulator, D
l, D2, D3...diode, C! , C2, Cs・
...Capacitor.
Claims (1)
る電圧を安定化させて出力する直流電源装置において、
前記電池の電圧の低下を検出する低電圧検出回路と、こ
の低電圧検出回路の出力状態により前記昇圧回路の昇圧
の倍率を可変する切替え回路とを有することを特徴とす
る直流電源装置。In a DC power supply device that boosts the voltage of a battery by an integer multiple using a booster circuit, it stabilizes the required voltage and outputs it.
A DC power supply device comprising: a low voltage detection circuit that detects a drop in the voltage of the battery; and a switching circuit that varies the boosting factor of the booster circuit depending on the output state of the low voltage detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25412389A JPH03118758A (en) | 1989-09-29 | 1989-09-29 | Dc power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25412389A JPH03118758A (en) | 1989-09-29 | 1989-09-29 | Dc power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03118758A true JPH03118758A (en) | 1991-05-21 |
Family
ID=17260548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25412389A Pending JPH03118758A (en) | 1989-09-29 | 1989-09-29 | Dc power supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03118758A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6150879A (en) * | 1997-09-22 | 2000-11-21 | Nec Corporation | Semiconductor apparatus for use in low voltage power supply |
| US7088356B2 (en) | 2002-11-25 | 2006-08-08 | Seiko Epson Corporation | Power source circuit |
| JP2008199745A (en) * | 2007-02-09 | 2008-08-28 | Matsushita Electric Works Ltd | Power supply circuit |
| US7688303B2 (en) | 1997-01-30 | 2010-03-30 | Renesas Technology Corp. | Liquid crystal display controller and liquid crystal display device |
| JP2015509812A (en) * | 2013-02-13 | 2015-04-02 | ハバロン メヂ アンド ビューティー カンパニー リミテッド | Portable high-frequency treatment device with built-in battery |
-
1989
- 1989-09-29 JP JP25412389A patent/JPH03118758A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7688303B2 (en) | 1997-01-30 | 2010-03-30 | Renesas Technology Corp. | Liquid crystal display controller and liquid crystal display device |
| US6150879A (en) * | 1997-09-22 | 2000-11-21 | Nec Corporation | Semiconductor apparatus for use in low voltage power supply |
| US7088356B2 (en) | 2002-11-25 | 2006-08-08 | Seiko Epson Corporation | Power source circuit |
| JP2008199745A (en) * | 2007-02-09 | 2008-08-28 | Matsushita Electric Works Ltd | Power supply circuit |
| JP2015509812A (en) * | 2013-02-13 | 2015-04-02 | ハバロン メヂ アンド ビューティー カンパニー リミテッド | Portable high-frequency treatment device with built-in battery |
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