JPH03119223U - - Google Patents
Info
- Publication number
- JPH03119223U JPH03119223U JP2635190U JP2635190U JPH03119223U JP H03119223 U JPH03119223 U JP H03119223U JP 2635190 U JP2635190 U JP 2635190U JP 2635190 U JP2635190 U JP 2635190U JP H03119223 U JPH03119223 U JP H03119223U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- main power
- backup power
- capacitor
- switching element
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Power Sources (AREA)
- Electronic Switches (AREA)
Description
第１図は本考案の一実施例に係るバツクアツプ
電源の電圧低下検出回路の構成図である。第２図
は本考案の他の実施例に係るバツクアツプ電源の
電圧低下検出回路の構成図である。第３図は従来
例を示す構成図である。
１……主電源、２……負荷、３……主電源ライ
ン、４……バツクアツプ用電源、５……バツクア
ツプ用電源ライン、６……コンデンサ、９……ス
イツチング素子、Ａ……接続点、ｉ……充電電流
、１６……コンデンサ。
FIG. 1 is a block diagram of a voltage drop detection circuit for a backup power supply according to an embodiment of the present invention. FIG. 2 is a block diagram of a voltage drop detection circuit for a backup power supply according to another embodiment of the present invention. FIG. 3 is a configuration diagram showing a conventional example. 1...Main power supply, 2...Load, 3...Main power line, 4...Backup power supply, 5...Backup power supply line, 6...Capacitor, 9...Switching element, A...Connection point, i...charging current, 16...capacitor.
Claims (1)
ンと、バツクアツプ電源と負荷との間を接続する
バツクアツプ用電源ラインとの間にスイツチング
素子を設けると共に、このスイツチング素子と前
記バツクアツプ用電源ラインとの接続点にコンデ
ンサの一端側を接続して、前記主電源がオフのと
きには前記コンデンサが前記バツクアツプ電源に
よつて充電されるようにし、前記主電源がオフか
らオンになつたときに前記スイツチング素子を介
してコンデンサを充電する電流が流れることに基
づいて前記バツクアツプ電源の電圧低下を検出す
るようにしたことを特徴とするバツクアツプ電源
の電圧低下検出回路。 (2) 主電源と負荷との間を接続する主電源ライ
ンと、前記主電源によつて充電されこの主電源が
オフのとき前記負荷をバツクアツプするコンデン
サとの間にスイツチング素子を接続し、前記主電
源がオフからオンになつたときに前記スイツチン
グ素子を介してコンデンサを充電する電流が流れ
ることに基づいて前記バツクアツプ電源の電圧低
下を検出するようにしたことを特徴とするバツク
アツプ電源の電圧低下検出回路。[Claims for Utility Model Registration] (1) A switching element is provided between the main power line that connects the main power source and the load and the backup power line that connects the backup power source and the load, One end of the capacitor is connected to the connection point between this switching element and the backup power supply line, so that when the main power supply is off, the capacitor is charged by the backup power supply, and when the main power supply is off, the capacitor is charged by the backup power supply. A voltage drop detection circuit for a backup power supply, characterized in that a voltage drop in the backup power supply is detected based on the fact that a current for charging a capacitor flows through the switching element when the switch is turned on. (2) A switching element is connected between a main power line that connects the main power source and the load and a capacitor that is charged by the main power source and backs up the load when the main power source is off; A voltage drop in the backup power supply is characterized in that a voltage drop in the backup power supply is detected based on the fact that a current that charges a capacitor flows through the switching element when the main power supply is turned on from off. detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2635190U JP2515950Y2 (en) | 1990-03-15 | 1990-03-15 | Backup power supply voltage drop detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2635190U JP2515950Y2 (en) | 1990-03-15 | 1990-03-15 | Backup power supply voltage drop detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03119223U true JPH03119223U (en) | 1991-12-09 |
| JP2515950Y2 JP2515950Y2 (en) | 1996-11-06 |
Family
ID=31529252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2635190U Expired - Lifetime JP2515950Y2 (en) | 1990-03-15 | 1990-03-15 | Backup power supply voltage drop detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2515950Y2 (en) |
-
1990
- 1990-03-15 JP JP2635190U patent/JP2515950Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2515950Y2 (en) | 1996-11-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |