JPH01180887U - - Google Patents
Info
- Publication number
- JPH01180887U JPH01180887U JP7012788U JP7012788U JPH01180887U JP H01180887 U JPH01180887 U JP H01180887U JP 7012788 U JP7012788 U JP 7012788U JP 7012788 U JP7012788 U JP 7012788U JP H01180887 U JPH01180887 U JP H01180887U
- Authority
- JP
- Japan
- Prior art keywords
- negative voltage
- npn transistor
- power supply
- collector
- output
- 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 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は、本考案による負電圧入力直流安定化
電源回路の実施例を示すブロツク図である。第２
図は、従来の直流安定化電源回路のブロツク図で
ある。
１１……シリーズレギユレータ、１２，２２…
…ＰＷＭコントロールＩＣ、１３，２３……内部
基準電圧発生部、１４，２４……内部基準電圧と
出力電圧の比較部、１５，２５……スイツチング
用トランジスタ、１６，２６……整流用ダイオー
ド、１７，２７……平滑回路、ａ……ＰＷＭコン
トロールＩＣ高電位側電源入力端子、ｂ……ＰＷ
ＭコントロールＩＣ低電位側電源入力端子、ｃ…
…電源入力端子、ｄ……出力端子。
FIG. 1 is a block diagram showing an embodiment of a negative voltage input DC stabilized power supply circuit according to the present invention. Second
The figure is a block diagram of a conventional DC stabilized power supply circuit. 11... Series regulator, 12, 22...
... PWM control IC, 13, 23 ... Internal reference voltage generation section, 14, 24 ... Internal reference voltage and output voltage comparison section, 15, 25 ... Switching transistor, 16, 26 ... Rectification diode, 17 , 27...Smoothing circuit, a...PWM control IC high potential side power input terminal, b...PW
M control IC low potential side power input terminal, c...
...Power input terminal, d...Output terminal.
Claims (1)
力するシリーズレギユレータと、エミツタが前記
負電圧電源に接続されたＮＰＮ形トランジスタと
、前記ＮＰＮ形トランジスタのコレクタとアース
間に挿入された整流素子と、前記ＮＰＮ形トラン
ジスタのコレクタに接続され、前記ＮＰＮ形トラ
ンジスタのコレクタに現われる負電圧を平滑化し
、出力端子に送出する平滑回路と、低電位側電源
入力端子には前記シリーズレギユレータからの負
電圧出力が、高電位側電源入力端子にはアースが
それぞれ接続され、内蔵された基準電圧発生部に
よつて作られた基準電圧と前記平滑回路出力とを
内蔵の比較部により比較し、その比較器出出力に
したがつて前記ＮＰＮ形トランジスタのベースに
制御信号を送出するパルス幅変調コントロールＩ
Ｃとから構成したことを特徴とする負電圧入力直
流安定化電源回路。 a series regulator connected to a negative voltage power supply and outputting a stabilized negative voltage; an NPN transistor whose emitter is connected to the negative voltage power supply; and a rectifier inserted between the collector of the NPN transistor and ground. a smoothing circuit connected to the collector of the NPN transistor to smooth the negative voltage appearing at the collector of the NPN transistor and send it to the output terminal; The negative voltage output is connected to the ground to the high potential side power supply input terminal, and the reference voltage generated by the built-in reference voltage generation part and the smoothing circuit output are compared by the built-in comparison part, A pulse width modulation control I that sends a control signal to the base of the NPN transistor according to the comparator output.
A negative voltage input DC stabilized power supply circuit comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7012788U JPH01180887U (en) | 1988-05-27 | 1988-05-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7012788U JPH01180887U (en) | 1988-05-27 | 1988-05-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01180887U true JPH01180887U (en) | 1989-12-26 |
Family
ID=31295386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7012788U Pending JPH01180887U (en) | 1988-05-27 | 1988-05-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01180887U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0630566A (en) * | 1992-04-27 | 1994-02-04 | Elmo Co Ltd | Power device for incandescent lamp |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59122369A (en) * | 1982-12-27 | 1984-07-14 | Matsushita Electric Works Ltd | Switching power source circuit |
| JPS615902U (en) * | 1984-06-15 | 1986-01-14 | 豊志 内 | Water stop material |
-
1988
- 1988-05-27 JP JP7012788U patent/JPH01180887U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59122369A (en) * | 1982-12-27 | 1984-07-14 | Matsushita Electric Works Ltd | Switching power source circuit |
| JPS615902U (en) * | 1984-06-15 | 1986-01-14 | 豊志 内 | Water stop material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0630566A (en) * | 1992-04-27 | 1994-02-04 | Elmo Co Ltd | Power device for incandescent lamp |