JPH0297835U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の直流安定化電源装置の回路図
、第２図は従来の直流安定化電源装置の回路図、
第３図は本考案に係る直流安定化電源装置の他の
実施例を示す回路図、第４図は本考案に係る多数
の出力電圧を出力する直流安定化電源装置の回路
図である。 ２……トランス、３……スイツチング制御回路
、４……受光素子、５……発光素子、６，７……
整流平滑部、８……電圧検出回路、Ｃ１，Ｃ２，
Ｃ３……コンデンサ、ＣＰ……比較器、Ｄ２，Ｄ
３……ダイオード、Ｅ……定電圧源、Ｑ１，Ｑ２
……ＮＰＮトランジスタ、Ｒ１，Ｒ２，Ｒ３，Ｒ
５……抵抗。 Figure 1 is a circuit diagram of the DC stabilized power supply of the present invention, Figure 2 is a circuit diagram of a conventional DC stabilized power supply,
FIG. 3 is a circuit diagram showing another embodiment of the DC stabilized power supply device according to the present invention, and FIG. 4 is a circuit diagram of a DC stabilized power supply device that outputs a large number of output voltages according to the present invention. 2...Transformer, 3...Switching control circuit, 4...Light receiving element, 5...Light emitting element, 6, 7...
Rectification and smoothing section, 8... Voltage detection circuit, C1, C2,
C3...Capacitor, CP...Comparator, D2, D
3...Diode, E...constant voltage source, Q1, Q2
...NPN transistor, R1, R2, R3, R
5...Resistance.

Claims (1)

【実用新案登録請求の範囲】 直流入力電源と、 この直流入力電源の直流入力電圧を受入れる１
次コイルと、複数の２次コイルとからなるトラン
スと、 このトランスの１次コイルに直列に接続された
スイツチング回路と各２次コイルに接続された整
流平滑部とを有し、 少なくとも１つの整流平滑部の出力電圧を検出
する電圧検出回路が設けられ、 この電圧検出回路の検出した検出電圧に対応し
て光量を増減する発光素子と、 この発光素子の光を受けて、その光量に応じた
電圧制御信号を出力する受光素子と、 前記電圧制御信号に基づいて、前記出力電圧を
一定範囲に保持するために前記スイツチング回路
のオン動作を伸縮制御するスイツチング制御回路
と、 少なくとも、１つの前記整流平滑部にはその出
力電流を検出する電流検出回路を設け、 この電流検出回路は前記電圧検出回路に接続し
、当該整流平滑部の出力電流が基準値を越えたと
き、前記発光素子の光量を変化させ、前記スイツ
チング制御回路に対し前記出力電圧を制限させる
よう制御することを特徴とする直流安定化電源装
置。[Scope of claim for utility model registration] A DC input power source, and 1 that accepts the DC input voltage of this DC input power source.
A transformer including a secondary coil and a plurality of secondary coils, a switching circuit connected in series to the primary coil of the transformer, and a rectifying and smoothing section connected to each secondary coil, and at least one rectifying coil. A voltage detection circuit that detects the output voltage of the smoothing section is provided, a light emitting element that increases or decreases the amount of light in response to the detected voltage detected by this voltage detection circuit, and a light emitting element that receives light from this light emitting element and adjusts the amount of light according to the amount of light. a light receiving element that outputs a voltage control signal; a switching control circuit that expands and contracts the on-operation of the switching circuit to maintain the output voltage within a certain range based on the voltage control signal; and at least one of the rectifiers. The smoothing section is provided with a current detection circuit for detecting its output current, and this current detection circuit is connected to the voltage detection circuit, and when the output current of the rectification and smoothing section exceeds a reference value, the amount of light from the light emitting element is adjusted. A DC stabilized power supply device characterized in that the output voltage is controlled by the switching control circuit to limit the output voltage.