JPS5837791U - Switching power supply overcurrent detection circuit - Google Patents
Switching power supply overcurrent detection circuitInfo
- Publication number
- JPS5837791U JPS5837791U JP13080381U JP13080381U JPS5837791U JP S5837791 U JPS5837791 U JP S5837791U JP 13080381 U JP13080381 U JP 13080381U JP 13080381 U JP13080381 U JP 13080381U JP S5837791 U JPS5837791 U JP S5837791U
- Authority
- JP
- Japan
- Prior art keywords
- detection resistor
- circuit
- detection
- power supply
- 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
Landscapes
- Dc-Dc Converters (AREA)
- Power Conversion In General (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図：第２図はそれぞれ過電流保護機能を有するセイ
ッチング電源の回路図、第３図は本考案の一実施例を示
す回路図、第４図、第５図はそれ −ぞれその動作説
明図、第６図は本考案の他の実施例を示す回路図である
。
１・・・スイッチング回路、２・・・発振・制御回路、
３・・・誤差検出回路、Ｔ・・・トランス、Ｑ・・・ス
イッチング素子、Ｃ２・・・平滑コンデンサ、Ｒ８１・
・・第１の検出抵抗、Ｒ８２・・・第２の検出抵抗。Figure 1: Figure 2 is a circuit diagram of a switching power supply with an overcurrent protection function, Figure 3 is a circuit diagram showing an embodiment of the present invention, and Figures 4 and 5 are each its operation. The explanatory diagram, FIG. 6, is a circuit diagram showing another embodiment of the present invention. 1... Switching circuit, 2... Oscillation/control circuit,
3...Error detection circuit, T...Transformer, Q...Switching element, C2...Smoothing capacitor, R81.
...First detection resistor, R82...Second detection resistor.
Claims (1)
し、２次側に誘起された出力を整流し、チョークコイル
と平滑コンデンサとからなるチョーク入力型平滑回路で
平滑して負荷に供給し、負荷電流を抵抗で検出して前記
スイッチング素子の動作を制御するようにしたスイッチ
ング電源の過電流検出回路において、電流検出抵抗は、
電流の帰路もしくは供給路の平滑コンデンサと負荷との
間に設けられた第１の検出抵抗と、前記整流回路と平滑
コンデンサとの間に設けられた第２の検出抵抗とからな
り、それら第１及び第２の検出抵抗の端子電圧の合成値
から過電流を検出するようにしたスイッチング電源の過
電流検出回路。 ２ 第１の検出抵抗Ｒｓ□と第２の検出抵抗Ｒ８２の値
がＲ３１〈Ｒ５２となっている実用新案登録請求の範囲
第１項記載の回路。 ３ 第１の検出抵抗と第２の検出抵抗とが直列に接続さ
れている実用新案登録請求の範囲第１項記載の回路。 ４ 第１の検出抵抗゛と第２の検出抵抗の各端子電圧を
それぞれ増幅し、それらの出力を合成して −過
電流検出を行うようにした実用新案登録請求の範囲第１
項記載の回路。[Claims for Utility Model Registration] 1 DC input is switched by a switching element, the output induced on the secondary side is rectified, smoothed by a choke input type smoothing circuit consisting of a choke coil and a smoothing capacitor, and then supplied to the load. In an overcurrent detection circuit for a switching power supply in which the load current is detected by a resistor to control the operation of the switching element, the current detection resistor is
It consists of a first detection resistor provided between the smoothing capacitor of the current return path or supply path and the load, and a second detection resistor provided between the rectifier circuit and the smoothing capacitor, and and an overcurrent detection circuit for a switching power supply, which detects an overcurrent from a composite value of terminal voltages of a second detection resistor. 2. The circuit according to claim 1, wherein the values of the first detection resistor Rs□ and the second detection resistor R82 are R31<R52. 3. The circuit according to claim 1, wherein the first detection resistor and the second detection resistor are connected in series. 4. Utility model registration claim 1 in which the respective terminal voltages of the first detection resistor and the second detection resistor are amplified and their outputs are combined to perform overcurrent detection.
The circuit described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13080381U JPS5837791U (en) | 1981-09-02 | 1981-09-02 | Switching power supply overcurrent detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13080381U JPS5837791U (en) | 1981-09-02 | 1981-09-02 | Switching power supply overcurrent detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5837791U true JPS5837791U (en) | 1983-03-11 |
Family
ID=29924411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13080381U Pending JPS5837791U (en) | 1981-09-02 | 1981-09-02 | Switching power supply overcurrent detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5837791U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60157619U (en) * | 1984-03-27 | 1985-10-21 | 日本石油化学株式会社 | Reinforced soft sheet palette |
| JPS60157618U (en) * | 1984-03-27 | 1985-10-21 | 日本石油化学株式会社 | Soft sheet palette |
-
1981
- 1981-09-02 JP JP13080381U patent/JPS5837791U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60157619U (en) * | 1984-03-27 | 1985-10-21 | 日本石油化学株式会社 | Reinforced soft sheet palette |
| JPS60157618U (en) * | 1984-03-27 | 1985-10-21 | 日本石油化学株式会社 | Soft sheet palette |
| JPH0318356Y2 (en) * | 1984-03-27 | 1991-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5837791U (en) | Switching power supply overcurrent detection circuit | |
| JPS5883129U (en) | Switching power supply transformer with current detection section | |
| JPH0626070Y2 (en) | AC-DC converter circuit | |
| JPH0793819B2 (en) | Constant current supply circuit | |
| JPS5827215A (en) | Overload protecting device for multi-output switching power source | |
| JPS6089786U (en) | switching power supply | |
| JPH03207217A (en) | Overcurrent detecting circuit | |
| JPH0226344U (en) | ||
| JPS61205286U (en) | ||
| JPH0363084U (en) | ||
| JPS60162991U (en) | Inrush current prevention circuit using AC transformer | |
| JPS5841086U (en) | smoothing circuit | |
| JPS60132140U (en) | Switching power supply protection circuit | |
| JPH02228248A (en) | Switching power source | |
| JPS631024B2 (en) | ||
| JPH01113585U (en) | ||
| JPS59103591U (en) | DC stabilized power supply | |
| JPS60117689U (en) | power supply | |
| JPS6038077U (en) | switching power supply | |
| JPS6077289U (en) | Switching type DC power supply | |
| JPS63153784U (en) | ||
| JPS60171041U (en) | power supply | |
| JPS5822086U (en) | Multi-output power supply | |
| JPH0232118U (en) | ||
| JPS6317276B2 (en) |