JPS62161586U - - Google Patents
Info
- Publication number
- JPS62161586U JPS62161586U JP5028186U JP5028186U JPS62161586U JP S62161586 U JPS62161586 U JP S62161586U JP 5028186 U JP5028186 U JP 5028186U JP 5028186 U JP5028186 U JP 5028186U JP S62161586 U JPS62161586 U JP S62161586U
- Authority
- JP
- Japan
- Prior art keywords
- rectifying
- output
- smoothing circuit
- converter
- switch
- 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
- 238000009499 grossing Methods 0.000 claims description 9
- 238000003079 width control Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Dc-Dc Converters (AREA)
- Protection Of Static Devices (AREA)
Description
第１図は本考案の過電圧保護回路の実施例の回
路図、第２図は第１図の保護回路を使用して並列
冗長運転するときの回路図、第３図は従来例のブ
ロツク回路図である。
１，１′…ＤＣ―ＤＣコンバータ、２，２′…
整流平滑回路、３，３′…コンパレータ、４，４
′…基準電圧、１１…主トランス、１２…スイツ
チ、１３…整流平滑回路、１４，１４′…ＰＷＭ
制御ＩＣ、１４１，１４２…パルス幅制御端子。
Figure 1 is a circuit diagram of an embodiment of the overvoltage protection circuit of the present invention, Figure 2 is a circuit diagram for parallel redundant operation using the protection circuit of Figure 1, and Figure 3 is a block circuit diagram of a conventional example. It is. 1, 1'...DC-DC converter, 2, 2'...
Rectifier smoothing circuit, 3, 3'... comparator, 4, 4
'... Reference voltage, 11... Main transformer, 12... Switch, 13... Rectifier and smoothing circuit, 14, 14'... PWM
Control IC, 14 1 , 14 2 ... pulse width control terminal.
Claims (1)
列に接続して直流入力につなぎ、前記トランス１
１の２次巻線の両端子間に第１整流平滑回路１３
を接続し、この出力をＰＷＭ制御ＩＣ１４のパル
ス幅制御端子１４１につなぎ、ＰＷＭ制御ＩＣ１
４の出力によつて前記スイツチ１２を駆動して直
流入力をスイツチングし、前記第１整流平滑回路
１３の出力から直流出力を取り出すように構成さ
れたＤＣ―ＤＣコンバータ１において、前記第１
整流平滑回路１３と並列に接続された第２整流平
滑回路２と、この第２整流平滑回路２の出力と基
準電圧４とを比較するコンバレータ３とを備え、
このコンパレータ３の出力線を前記ＰＷＭ制御Ｉ
Ｃ１４のパルス幅制御端子１４２に接続し、前記
第２整流平滑回路２の出力電圧が異常上昇すると
、ＤＣ―ＤＣコンバータ１の動作が停止するよう
に構成されたＤＣ―ＤＣコンバータの過電圧保護
回路。 The primary winding of the main transformer 11 and the switch 12 are connected in series and connected to the DC input.
A first rectifying and smoothing circuit 13 is connected between both terminals of the secondary winding 1.
and connect this output to the pulse width control terminal 141 of the PWM control IC14.
In the DC-DC converter 1, the DC-DC converter 1 is configured to drive the switch 12 by the output of the first rectifying and smoothing circuit 13 to switch the DC input, and extract the DC output from the output of the first rectifying and smoothing circuit 13.
A second rectifying and smoothing circuit 2 connected in parallel with the rectifying and smoothing circuit 13, and a converter 3 that compares the output of the second rectifying and smoothing circuit 2 with a reference voltage 4,
The output line of this comparator 3 is connected to the PWM control I
An overvoltage protection circuit for a DC-DC converter connected to the pulse width control terminal 142 of C14 and configured to stop the operation of the DC-DC converter 1 when the output voltage of the second rectifying and smoothing circuit 2 increases abnormally. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5028186U JPS62161586U (en) | 1986-04-03 | 1986-04-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5028186U JPS62161586U (en) | 1986-04-03 | 1986-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62161586U true JPS62161586U (en) | 1987-10-14 |
Family
ID=30873498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5028186U Pending JPS62161586U (en) | 1986-04-03 | 1986-04-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62161586U (en) |
-
1986
- 1986-04-03 JP JP5028186U patent/JPS62161586U/ja active Pending
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