JPH0421184U - - Google Patents
Info
- Publication number
- JPH0421184U JPH0421184U JP5988190U JP5988190U JPH0421184U JP H0421184 U JPH0421184 U JP H0421184U JP 5988190 U JP5988190 U JP 5988190U JP 5988190 U JP5988190 U JP 5988190U JP H0421184 U JPH0421184 U JP H0421184U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- supply circuit
- output voltage
- set output
- switching power
- 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
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案の一実施例による直流電源回路
の回路図、第２図は本考案の一実施例による直流
電源回路を用いた場合の入力電圧と出力電圧の関
係を示す図、第３図ａは従来の降圧型スイツチン
グ電源回路の一回路図、第３図ｂはその基準三角
波とパルス幅変調の関係を示す図、第４図は従来
の昇圧型スイツチング電源回路の一電源回路の一
回路図、第５図は従来のトランス方式のスイツチ
ング電源回路の一回路を示す図である。
図において、１は入力電源、２Ａ，Ｂはスイツ
チングトランジスタ、３Ａ，３Ｂ，１４Ａはベー
ス抵抗、４Ａ，Ｂはスイツチングダイオード、５
はコイル、６は平滑コンデンサ、７は可変抵抗器
、８は出力端子、９，１７は比較器、１０は基準
三角波、１６は切換基準電圧、１８〜２１はスイ
ツチである。なお図中同一符号は同一又は相当部
分を示す。
FIG. 1 is a circuit diagram of a DC power supply circuit according to an embodiment of the present invention, FIG. 2 is a diagram showing the relationship between input voltage and output voltage when using a DC power supply circuit according to an embodiment of the present invention, and FIG. Figure a is a circuit diagram of a conventional step-down switching power supply circuit, Figure 3 b is a diagram showing the relationship between the reference triangular wave and pulse width modulation, and Figure 4 is a diagram of a conventional step-up switching power supply circuit. The circuit diagram shown in FIG. 5 is a diagram showing one circuit of a conventional transformer type switching power supply circuit. In the figure, 1 is an input power supply, 2A, B are switching transistors, 3A, 3B, 14A are base resistors, 4A, B are switching diodes, 5
1 is a coil, 6 is a smoothing capacitor, 7 is a variable resistor, 8 is an output terminal, 9 and 17 are comparators, 10 is a reference triangular wave, 16 is a switching reference voltage, and 18 to 21 are switches. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
型スイツチング電源回路と、 入力電圧を上記所定の設定出力電圧に昇圧する
昇圧型スイツチング電源回路と、 入力電圧と上記所定の設定出力電圧とを比較す
る比較手段と、 上記両電源回路を切換えるスイツチ手段とを備
え、 上記入力電圧が上記設定出力電圧よりも低い時
には昇圧型の、また高い時には降圧型のスイツチ
ング電源回路として働くようにしたことを特徴と
する直流電源回路。[Claims for Utility Model Registration] A step-down switching power supply circuit that steps down the input voltage to a predetermined set output voltage, a step-up switching power supply circuit that steps up the input voltage to the above-described set output voltage, and an input voltage and the above-mentioned set output voltage. and a switching means for switching between the two power supply circuits, and when the input voltage is lower than the set output voltage, the circuit operates as a step-up type switching power supply circuit, and when it is higher than the set output voltage, it operates as a step-down switching power supply circuit. A DC power supply circuit characterized by being made to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5988190U JPH0421184U (en) | 1990-06-06 | 1990-06-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5988190U JPH0421184U (en) | 1990-06-06 | 1990-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0421184U true JPH0421184U (en) | 1992-02-21 |
Family
ID=31586770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5988190U Pending JPH0421184U (en) | 1990-06-06 | 1990-06-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0421184U (en) |
-
1990
- 1990-06-06 JP JP5988190U patent/JPH0421184U/ja active Pending