JPS6437135U - - Google Patents
Info
- Publication number
- JPS6437135U JPS6437135U JP13151887U JP13151887U JPS6437135U JP S6437135 U JPS6437135 U JP S6437135U JP 13151887 U JP13151887 U JP 13151887U JP 13151887 U JP13151887 U JP 13151887U JP S6437135 U JPS6437135 U JP S6437135U
- Authority
- JP
- Japan
- Prior art keywords
- power transistor
- value
- detecting
- current
- load
- 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
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の一実施例のブロツク図、第２
図は第１図のブロツク図を具体化した回路の一実
施例図、第３図は第２図の回路の動作特性図、第
４図は従来装置の一例図、第５図は第４図の装置
の特性図、第６図は従来装置の他の一例図である
。
符号の説明、３１……パワートランジスタ、３
２……負荷、３３……駆動手段、３４……電流検
知手段、３５……電圧検知手段、３６……演算手
段。
Fig. 1 is a block diagram of an embodiment of the present invention;
The figure shows an example of a circuit that embodies the block diagram of Fig. 1, Fig. 3 shows the operating characteristics of the circuit of Fig. 2, Fig. 4 shows an example of a conventional device, and Fig. 5 shows the circuit shown in Fig. 4. FIG. 6 is another example of the conventional device. Explanation of symbols, 31... Power transistor, 3
2... Load, 33... Drive means, 34... Current detection means, 35... Voltage detection means, 36... Calculation means.
Claims (1)
、該パワートランジスタに流れる電流を検出する
手段と、上記パワートランジスタに印加されてい
る電圧を検出する手段と、上記両手段で検出した
電流と電圧の積を演算し、その値が所定値以上の
値を継続した場合にはその値に応じた所定の遅れ
時間後に上記パワートランジスタをオフにする手
段とを備えたことを特徴とするパワートランジス
タの保護装置。 A power transistor for switching a load, a means for detecting a current flowing through the power transistor, a means for detecting a voltage applied to the power transistor, and calculating the product of the current and voltage detected by both of the above means, A protection device for a power transistor, comprising means for turning off the power transistor after a predetermined delay time corresponding to the value if the value continues to be a predetermined value or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987131518U JPH0533071Y2 (en) | 1987-08-31 | 1987-08-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987131518U JPH0533071Y2 (en) | 1987-08-31 | 1987-08-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6437135U true JPS6437135U (en) | 1989-03-06 |
| JPH0533071Y2 JPH0533071Y2 (en) | 1993-08-24 |
Family
ID=31387663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987131518U Expired - Lifetime JPH0533071Y2 (en) | 1987-08-31 | 1987-08-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0533071Y2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006279369A (en) * | 2005-03-29 | 2006-10-12 | Hitachi Kokusai Electric Inc | Transmission amplifier |
| JP2007295184A (en) * | 2006-04-24 | 2007-11-08 | Auto Network Gijutsu Kenkyusho:Kk | Power supply control apparatus |
| JP2011193448A (en) * | 2010-02-12 | 2011-09-29 | Infineon Technologies Ag | High-frequency switching circuit and method for determining power of high-frequency signal |
| JP2016046768A (en) * | 2014-08-26 | 2016-04-04 | オンキヨー株式会社 | Protection circuit |
| WO2017119126A1 (en) * | 2016-01-08 | 2017-07-13 | 三菱電機株式会社 | Semiconductor device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6927626B2 (en) * | 2002-09-23 | 2005-08-09 | Harman International Industries, Incorporated | Thermal protection system for an output stage of an amplifier |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5750093A (en) * | 1980-09-08 | 1982-03-24 | Hochiki Co | Information transmission member |
| JPS57212825A (en) * | 1981-06-24 | 1982-12-27 | Nec Corp | Protective device |
-
1987
- 1987-08-31 JP JP1987131518U patent/JPH0533071Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5750093A (en) * | 1980-09-08 | 1982-03-24 | Hochiki Co | Information transmission member |
| JPS57212825A (en) * | 1981-06-24 | 1982-12-27 | Nec Corp | Protective device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006279369A (en) * | 2005-03-29 | 2006-10-12 | Hitachi Kokusai Electric Inc | Transmission amplifier |
| JP4643331B2 (en) * | 2005-03-29 | 2011-03-02 | 株式会社日立国際電気 | Transmit amplifier |
| JP2007295184A (en) * | 2006-04-24 | 2007-11-08 | Auto Network Gijutsu Kenkyusho:Kk | Power supply control apparatus |
| JP2011193448A (en) * | 2010-02-12 | 2011-09-29 | Infineon Technologies Ag | High-frequency switching circuit and method for determining power of high-frequency signal |
| JP2016046768A (en) * | 2014-08-26 | 2016-04-04 | オンキヨー株式会社 | Protection circuit |
| WO2017119126A1 (en) * | 2016-01-08 | 2017-07-13 | 三菱電機株式会社 | Semiconductor device |
| JPWO2017119126A1 (en) * | 2016-01-08 | 2018-03-15 | 三菱電機株式会社 | Semiconductor device |
| US10734990B2 (en) | 2016-01-08 | 2020-08-04 | Mitsubishi Electric Corporation | Semiconductor apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0533071Y2 (en) | 1993-08-24 |