JP2021150820A - 半導体装置およびその過電流保護機能 - Google Patents
半導体装置およびその過電流保護機能 Download PDFInfo
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- 230000006870 function Effects 0.000 abstract description 9
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- 238000010586 diagram Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 3
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 240000004050 Pentaglottis sempervirens Species 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
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- 238000013021 overheating Methods 0.000 description 1
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Abstract
Description
2…スイッチング素子
2a…スイッチング素子
3…制御回路の温度検出用ダイオード
4…過電流基準電圧補正回路
5…過電流基準電圧回路
5a…従来技術における過電流基準電圧回路
6…過電流検出コンパレータ
7…センス電圧検出用抵抗
8…スイッチング素子温度検出用ダイオード
9…過熱検出コンパレータ
10…過熱基準電圧回路
11、12…定電流源
13…フィルタ
101…デジタル化回路(3段階)
101a…デジタル化回路(4段階)
102〜103、102a、103a…コンパレータ
104、105、104a、105a…スイッチ
106〜112、123〜126、133〜136、106a、110a…抵抗
121、131…差動増幅回路
201…コレクタ電流に対する、センス電圧
202…スイッチング素子温度がTHにおける、センス電圧
203…スイッチング素子、制御回路ともに温度がTHにおける、過電流保護値
204…スイッチング素子温度がTLにおける、センス電圧
205…スイッチング素子、制御回路ともに温度がTLにおける、過電流保護値
206…従来設計において、スイッチング素子温度がTH、制御回路温度がTLにおける、過電流保護値
207…従来設計における、過電流保護の冗長範囲
208…本発明の実施例に係る電力用半導体装置における、過電流保護の冗長範囲
301〜306…IGBT
311〜316…保護用ダイオード
321〜326…制御回路
401…IGBT素子
402…ダイオード素子
403…絶縁基板
404…エミッタパターン
405…コレクタパターン
406…ゲートパターン
407…金属ワイヤー
408…制御エミッタパターン
409…底面金属基板
410…樹脂ケース
411…主エミッタ端子
412…主コレクタ端子
416…ゲート端子
418…制御エミッタ端子
420…制御基板
431…中継絶縁基板
435…サーミスタ
500、600…半導体装置モジュール
501、502…ユニット枠
Claims (24)
- スイッチング素子と、
前記スイッチング素子を制御する、前記スイッチング素子の過電流検出回路を有した制御回路と、
前記スイッチング素子の温度検出用の第1の温度検出手段と、
前記制御回路の温度検出用の第2の温度検出手段と、
を備え、
前記制御回路は、前記第1の温度検出手段および前記第2の温度検出手段により検出された第1の検出値および第2の検出値を基に、前記過電流検出回路の過電流基準値を補正し、補正後の過電流基準値を出力する基準補正回路を備えた、半導体装置。 - 前記基準補正回路は、前記第1の検出値と第2の検出値により前記スイッチング素子の温度と前記制御回路の温度の差が所定以上離れていると判断した場合に前記第1の検出値に基づいて前記過電流基準値を補正する、請求項1に記載の半導体装置。
- 前記スイッチング素子が、所定の回路パターンを有し、電子部品が搭載された絶縁基板で形成される第1の回路基板上に搭載されている、請求項1または2に記載の半導体装置。
- 前記制御回路が、所定の回路パターンを有し、電子部品が搭載された絶縁基板で形成される第2の回路基板上に搭載されている、請求項1から3までのいずれかに記載の半導体装置。
- 前記スイッチング素子と前記制御回路が、所定の回路パターンを有し、電子部品が搭載された絶縁基板で形成される同一の第3の回路基板上に搭載されている、請求項1または2に記載の半導体装置。
- 前記スイッチング素子を覆うように第1の樹脂ケースが成形されている、請求項1から5までのいずれか一項に記載の半導体装置。
- 前記制御回路を覆うように第2の樹脂ケースが成形されている、請求項1から6までのいずれか一項に記載の半導体装置。
- 前記スイッチング素子と前記制御回路を覆うように同一の第3の樹脂ケースが成形されている、請求項1から5までのいずれか一項に記載の半導体装置。
- 前記スイッチング素子に設けられた前記第1の温度検出手段が、前記スイッチング素子と同一素子内、あるいは、前記第1あるいは前記第3の回路基板上もしくは前記第1あるいは前記第3の樹脂ケース内もしくは前記第1あるいは前記第3の樹脂ケース近傍の、前記スイッチング素子温度が計測可能な箇所に設置された事を特徴とする、請求項1から8までのいずれか一項に記載の半導体装置。
- 前記制御回路に設けられた前記第2の温度検出手段が、前記制御回路と同一素子内、あるいは、前記第2あるいは前記第3の回路基板上もしくは前記第2あるいは前記第3の樹脂ケース内もしくは前記第2あるいは前記第3の樹脂ケース近傍の、前記制御回路温度が計測可能な箇所に設置された事を特徴とする、請求項1から9までのいずれか一項に記載の半導体装置。
- 前記スイッチング素子として、IGBTを用いた、請求項1から10までのいずれか一項に記載の半導体装置。
- 前記スイッチング素子として、MOSFETを用いた、請求項1から10までのいずれか一項に記載の半導体装置。
- 前記第1および前記第2の温度検出手段がダイオードによるセンス電圧の検出など負の温度特性を持つ事を特徴とした、請求項1から12までのいずれか一項に記載の半導体装置。
- 前記第1および前記第2の温度検出手段が正の温度特性を持つ事を特徴とした、請求項1から12までのいずれか一項に記載の半導体装置
- 前記基準補正回路は、入力値をその大小関係に応じて複数の段階にデジタル化して出力するデジタル化回路を有する、請求項1から14のいずれか一項に記載の半導体装置。
- 前記基準補正回路は、前記第1の検出値の入力側に、前記デジタル化回路の出力側を接続する、請求項15に記載の半導体装置。
- 前記基準補正回路は、前記第2の検出値の入力側に、前記デジタル化回路の出力側を接続する、請求項15あるいは16のいずれか一項に記載の半導体装置。
- 前記基準補正回路は、前記基準補正回路の出力側に、前記デジタル回路の入力側を接続する、請求項15から17のいずれか一項に記載の半導体装置。
- 前記過電流検出回路は、前記スイッチング素子の通過電流に基づく電流検出値と、前記補正後の過電流基準値とを入力とし、比較する機能と、その結果に基づく信号を出力する機能とを有する、請求項1から18までのいずれか一項に記載の半導体装置。
- スイッチング素子の温度検出用の第1の温度検出手段によって第1の検出値を検出し、
前記スイッチング素子を制御する、前記スイッチング素子の過電流検出回路を有した制御回路の温度検出用の第2の温度検出手段によって第2の検出値を検出し、
前記制御回路に備えた基準補正回路によって、前記第1の検出値および前記第2の検出値を基に、前記過電流検出回路の過電流基準値を補正し、補正後の過電流基準値を出力する、半導体装置の過電流保護機能。 - 前記第1および前記第2の温度検出手段がダイオードによるセンス電圧の検出など負の温度特性を持つ事を特徴とし、
前記基準補正回路が、前記第1の検出値より前記第2の検出値の差を取る事で過電流基準補正値を算出し、更に前記本来の過電流基準値より前記過電流基準補正値の差を取る事で、前記補正後の過電流基準値を算出する、請求項20に記載の半導体装置の過電流保護機能。 - 前記第1および前記第2の温度検出手段が正の温度特性を持つ事を特徴とし、
前記基準補正回路が、前記第2の検出値より前記第1の検出値の差を取る事で過電流基準補正値を算出し、更に前記本来の過電流基準値より前記過電流基準補正値の差を取る事で、前記補正後の過電流基準値を算出する、請求項20に記載の半導体装置の過電流保護機能。 - 前記基準補正回路は、入力値をその大小関係に応じて複数の段階にデジタル化して出力するデジタル化回路を有し、前記第1の検出値、前記第2の検出値、あるいは前記補正後の過電流基準値のいずれか、あるいはこれらのうち複数個の数値をデジタル化して処理する、請求項20から22のいずれか一項に記載の半導体装置の過電流保護機能。
- 前記スイッチング素子の通過電流に基づく電流検出値を前記過電流基準値と比較し、前記電流検出値が前記過電流基準値を超えた事によって過電流が発生したことを検出する、請求項20から23のいずれか一項に記載の半導体装置の過電流保護機能。
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