JPH0190290U - - Google Patents
Info
- Publication number
- JPH0190290U JPH0190290U JP18297087U JP18297087U JPH0190290U JP H0190290 U JPH0190290 U JP H0190290U JP 18297087 U JP18297087 U JP 18297087U JP 18297087 U JP18297087 U JP 18297087U JP H0190290 U JPH0190290 U JP H0190290U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power supply
- circuit
- secondary side
- voltages
- 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
- 238000004804 winding Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案の電源回路の一実施例を示す回
路図、第２図は本考案の他の実施例を示す回路図
、第３図は従来の電源回路を示す回路図、第４図
は第３図のスイツチ回路の従来例を示す回路図で
ある。
Ｄ１……整流回路、Ｄ２，Ｄ３……ダイオード
、Ｄ４，Ｄ６……ツエナダイオード、Ｄ５……フ
オトカプラ、Ｃ１〜Ｃ４……コンデンサ、Ｒ１〜
Ｒ３，Ｒ６，Ｒ７……抵抗、Ｔｒ１，Ｔｒ２，Ｔ
ｒ８，Ｔｒ９……トランジスタ、Ｔ１……スイツ
チングトランス、１……制御回路、３……定電圧
回路。
Fig. 1 is a circuit diagram showing one embodiment of the power supply circuit of the present invention, Fig. 2 is a circuit diagram showing another embodiment of the invention, Fig. 3 is a circuit diagram showing a conventional power supply circuit, and Fig. 4 is a circuit diagram showing an embodiment of the power supply circuit of the present invention. 3 is a circuit diagram showing a conventional example of the switch circuit shown in FIG. 3. FIG. D1... Rectifier circuit, D2, D3... Diode, D4, D6... Zener diode, D5... Photocoupler, C1~C4... Capacitor, R1~
R3, R6, R7...Resistance, Tr1, Tr2, T
r8, Tr9...transistor, T1...switching transformer, 1...control circuit, 3...constant voltage circuit.
Claims (1)
次側に供給しスイツチングトランジスタをオン、
オフして交流に変換し２次側の複数の巻線の電圧
をそれぞれ整流して複数の２次側直流電圧を得、
しかもこれら２次側直流電圧の内の１つの直流電
圧を２つの分圧抵抗の接続点に検出し基準電圧と
の誤差を検出しその誤差信号に基づいて前記スイ
ツチングトランジスタのオン期間を制御し２次側
直流電圧を安定化する安定化電源と、 この安定化電源の前記２つの分圧抵抗の一方の
分圧抵抗に対し抵抗を選択的に並列に接続して分
圧比を変更可能とし、前記２次側直流電圧を待機
時には減少させ、動作時には動作電圧にまで上昇
させる切換を行うスイツチ回路と、 前記安定化電源の前記２次側直流電圧の内１つ
の巻線に対応した直流電圧を第１の直流電圧とし
、この第１の直流電圧よりも低い別の巻線に対応
した第２の直流電圧をリモコン回路用電源電圧と
した場合、待機時には前記第１の直流電圧を定電
圧化してリモコン回路に電力供給し、動作時は２
次側直流電圧の上昇によつて前記電力供給を遮断
する機能を有した電源供給回路とを具備したこと
を特徴とする電源回路。[Claims for Utility Model Registration] 1 of the transformer for switching unstable DC voltage
supply to the next side and turn on the switching transistor,
Turn it off, convert it to AC, rectify the voltage of the multiple windings on the secondary side, and obtain multiple DC voltages on the secondary side,
Moreover, one of these secondary DC voltages is detected at the connection point of the two voltage dividing resistors, an error with the reference voltage is detected, and the on period of the switching transistor is controlled based on the error signal. A stabilized power supply that stabilizes the secondary side DC voltage; and a resistor selectively connected in parallel to one of the two voltage dividing resistors of the stabilized power supply to change the voltage dividing ratio; a switch circuit that reduces the secondary DC voltage during standby and increases it to an operating voltage during operation; and a DC voltage corresponding to one winding of the secondary DC voltage of the stabilized power supply. When the first DC voltage is set as the power supply voltage for the remote control circuit and the second DC voltage corresponding to another winding lower than this first DC voltage is set as the power supply voltage, the first DC voltage is made constant during standby. power is supplied to the remote control circuit, and when operating, 2
A power supply circuit comprising: a power supply circuit having a function of cutting off the power supply due to an increase in the next-side DC voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18297087U JPH0190290U (en) | 1987-12-02 | 1987-12-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18297087U JPH0190290U (en) | 1987-12-02 | 1987-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0190290U true JPH0190290U (en) | 1989-06-14 |
Family
ID=31474408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18297087U Pending JPH0190290U (en) | 1987-12-02 | 1987-12-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0190290U (en) |
-
1987
- 1987-12-02 JP JP18297087U patent/JPH0190290U/ja active Pending