JPS62161587U - - Google Patents
Info
- Publication number
- JPS62161587U JPS62161587U JP5028286U JP5028286U JPS62161587U JP S62161587 U JPS62161587 U JP S62161587U JP 5028286 U JP5028286 U JP 5028286U JP 5028286 U JP5028286 U JP 5028286U JP S62161587 U JPS62161587 U JP S62161587U
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- converter
- detection resistor
- output
- comparator
- 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
- 238000001514 detection method Methods 0.000 claims description 6
- 238000003079 width control Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案の実施例の回路図、第２図は第
１図の原理説明図、第３図は従来の保護回路図で
ある。
１…検出抵抗、２…抵抗分圧器、３…基準電圧
源、４…コンパレータ、５，５′…ＤＣ―ＤＣコ
ンバータ、６…ＰＷＭ制御ＩＣ、７…入力電源、
８…負荷、９…基準電圧、１０…過電流検出回路
、１１…動作停止信号送出回路、２１，２２…抵
抗、Ｖｉ…入力電圧、ＩｏＤ，Ｉ′ｏＤ…過電流
検出点に対応する出力側電流。
FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a diagram explaining the principle of FIG. 1, and FIG. 3 is a conventional protection circuit diagram. 1... Detection resistor, 2... Resistance voltage divider, 3... Reference voltage source, 4... Comparator, 5, 5'... DC-DC converter, 6... PWM control IC, 7... Input power supply,
8...Load, 9...Reference voltage, 10...Overcurrent detection circuit, 11...Operation stop signal sending circuit, 21, 22...Resistor, Vi...Input voltage, I o D, I' o D... Corresponds to overcurrent detection point output side current.
Claims (1)
圧機能をもつＤＣ―ＤＣコンバータにおいて、前
記ＤＣ―ＤＣコンバータの入力両端子間に接続さ
れた抵抗分圧器と、前記ＤＣ―ＤＣコンバータの
入力ラインに直列に接続された検出抵抗と、この
検出抵抗の入力電源側端子に接続された基準電圧
源とを備え、この基準電圧源の前記検出抵抗接続
側と反対側の端子と、前記抵抗分圧器の出力端子
とを、コンパレータの２つの入力端子にそれぞれ
接続し、このコンパレータの出力を前記ＰＷＭ制
御ＩＣのパルス幅制御端子に接続してなるＤＣ―
ＤＣコンバータの過電流保護回路。 In a DC-DC converter having a constant voltage function and including a PWM control IC that controls an output voltage, a resistive voltage divider connected between both input terminals of the DC-DC converter and an input line of the DC-DC converter is provided. It includes a detection resistor connected in series, and a reference voltage source connected to an input power supply side terminal of the detection resistor, and a terminal of the reference voltage source opposite to the detection resistor connection side and a terminal of the resistor voltage divider. The output terminal is connected to two input terminals of a comparator, and the output of this comparator is connected to the pulse width control terminal of the PWM control IC.
Overcurrent protection circuit for DC converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5028286U JPS62161587U (en) | 1986-04-03 | 1986-04-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5028286U JPS62161587U (en) | 1986-04-03 | 1986-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62161587U true JPS62161587U (en) | 1987-10-14 |
Family
ID=30873501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5028286U Pending JPS62161587U (en) | 1986-04-03 | 1986-04-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62161587U (en) |
-
1986
- 1986-04-03 JP JP5028286U patent/JPS62161587U/ja active Pending