JPH0391078U - - Google Patents
Info
- Publication number
- JPH0391078U JPH0391078U JP15194789U JP15194789U JPH0391078U JP H0391078 U JPH0391078 U JP H0391078U JP 15194789 U JP15194789 U JP 15194789U JP 15194789 U JP15194789 U JP 15194789U JP H0391078 U JPH0391078 U JP H0391078U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power supply
- circuit
- output
- switching
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 3
- 238000009499 grossing Methods 0.000 claims 3
- 230000000087 stabilizing effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Rectifiers (AREA)
- Control Of Voltage And Current In General (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案に係るスイツチング電源回路の
一実施例を示す回路図、第２図は同実施例におけ
るリセツト回路の動作説明のための波形図、第３
図は従来例を示す回路図である。
ＡＣ……交流電源、Ｒ１〜１５……抵抗、Ｃ１
〜Ｃ６……コンデンサ、Ｄ１〜Ｄ３……ダイオー
ド、ＺＤ１，ＺＤ２……低電圧ダイオード、Ｑ１
……電力スイツチングトランジスタ、Ｑ２……電
流スイツチングバツフア用トランジスタ、Ｌ１…
…チヨークコイル、Ｕ１ａ，Ｕ１ｂ……コンパレ
ータ。
FIG. 1 is a circuit diagram showing one embodiment of the switching power supply circuit according to the present invention, FIG. 2 is a waveform diagram for explaining the operation of the reset circuit in the same embodiment, and FIG.
The figure is a circuit diagram showing a conventional example. AC...AC power supply, R1-15...Resistance, C1
~C6...Capacitor, D1-D3...Diode, ZD1, ZD2...Low voltage diode, Q1
...Power switching transistor, Q2...Current switching buffer transistor, L1...
...Chiyoke coil, U1a, U1b...Comparator.
Claims (1)
、この整流・平滑部の出力をスイツチングする電
力スイツチングトランジスタと、スイツチング出
力を平滑化し、リツプル除去を行う第１、第２の
フイルタ回路と、スイツチング信号を前記電力ス
イツチングトランジスタのベースに十分な電流と
して伝達するための電流スイツチングバツフア用
トランジスタと、抵抗、定電圧ダイオード及びコ
ンデンサにより構成され、前記整流・平滑部の出
力から安定なコンパレータ用電源電圧を得る電源
安定化回路と、前記第１のフイルタ回路の出力電
圧を基準電圧と比較するコンパレータを有し、そ
の電源電流を前記電源安定化回路の他に前記電力
スイツチングトランジスタのベース回路からも受
けるとともに、その電源端と基準電圧入力端の間
に抵抗が接続された誤差検出部と、この誤差検出
部のコンパレータと同じパツケージ内に形成され
て、直流出力電圧を検出する抵抗分圧回路からの
分圧電圧を一方の入力、誤差検出部の基準電圧を
他方の入力とし、電源立上り時及び出力電圧一時
低下時にリセツト信号を生じるコンパレータ等に
より構成されたリセツト回路とを備えたことを特
徴とするスイツチング電源回路。 A rectifying/smoothing section that rectifies and smoothes the AC input, a power switching transistor that switches the output of the rectifying/smoothing section, and first and second filter circuits that smooth the switching output and remove ripples. , a current switching buffer transistor for transmitting a switching signal as a sufficient current to the base of the power switching transistor, a resistor, a constant voltage diode, and a capacitor, and a stable voltage is obtained from the output of the rectifying/smoothing section. It has a power supply stabilizing circuit that obtains a power supply voltage for the comparator, and a comparator that compares the output voltage of the first filter circuit with a reference voltage, and the power supply current is supplied to the power switching transistor in addition to the power supply stabilizing circuit. An error detection section that also receives from the base circuit and has a resistor connected between its power supply terminal and reference voltage input terminal, and a resistor that is formed in the same package as the comparator of this error detection section and detects the DC output voltage. It is equipped with a reset circuit that takes the divided voltage from the voltage divider circuit as one input, the reference voltage of the error detection section as the other input, and that is composed of a comparator, etc. that generates a reset signal when the power is turned on and when the output voltage temporarily drops. A switching power supply circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15194789U JPH073830Y2 (en) | 1989-12-28 | 1989-12-28 | Switching power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15194789U JPH073830Y2 (en) | 1989-12-28 | 1989-12-28 | Switching power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0391078U true JPH0391078U (en) | 1991-09-17 |
| JPH073830Y2 JPH073830Y2 (en) | 1995-01-30 |
Family
ID=31698230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15194789U Expired - Lifetime JPH073830Y2 (en) | 1989-12-28 | 1989-12-28 | Switching power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073830Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015166559A1 (en) * | 2014-04-30 | 2015-11-05 | 三菱電機株式会社 | Power supply device, light source lighting device, and battery charging device |
-
1989
- 1989-12-28 JP JP15194789U patent/JPH073830Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015166559A1 (en) * | 2014-04-30 | 2015-11-05 | 三菱電機株式会社 | Power supply device, light source lighting device, and battery charging device |
| JP5959785B2 (en) * | 2014-04-30 | 2016-08-02 | 三菱電機株式会社 | Power supply device, light source lighting device, and battery charging device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH073830Y2 (en) | 1995-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3710200B2 (en) | Power circuit | |
| JPH0391078U (en) | ||
| JP2712369B2 (en) | DC power supply | |
| JP2522842Y2 (en) | Multi-output switching regulator | |
| JPS6345813Y2 (en) | ||
| JPS6332154B2 (en) | ||
| JPH08115134A (en) | Power source circuit | |
| JPH034155Y2 (en) | ||
| JPS5855703Y2 (en) | Power supply for starting horizontal oscillation | |
| JP2507757Y2 (en) | Double voltage rectification automatic switching circuit | |
| JPS5975785U (en) | Switching regulator overcurrent protection circuit | |
| JP2572194Y2 (en) | Power circuit | |
| JPH0717273Y2 (en) | Inrush current limiting circuit for DC power supply | |
| JP2587044Y2 (en) | Power supply ON / OFF control circuit | |
| JPS6130354Y2 (en) | ||
| JPS60181678U (en) | AC power supply voltage fluctuation detection and counting device | |
| JPH054014Y2 (en) | ||
| JPS6359728A (en) | Automatic switching circuit for ac input source | |
| JPH06327148A (en) | Power supply circuit | |
| JPS6077289U (en) | Switching type DC power supply | |
| JPH07163147A (en) | Rectifying/smoothing circuit | |
| JPH0613390U (en) | Auxiliary power circuit | |
| JPH0567143U (en) | Overcurrent protection circuit for power supply | |
| JPH03218217A (en) | Power source circuit with rush current prevention circuit | |
| JPH01144106A (en) | Power unit |