JP2019526963A - 半導体スイッチングデバイスの高速温度検出のための集積回路 - Google Patents
半導体スイッチングデバイスの高速温度検出のための集積回路 Download PDFInfo
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Abstract
Description
Claims (28)
- パワートランジスタデバイスに流れる電流により温度上昇がもたらされる、前記パワートランジスタデバイスにおける前記温度上昇を検出するための集積回路(IC)であって、前記ICが、
基材であって、
前記パワートランジスタデバイスが、前記基材上に位置する、
前記基材と、
前記基材上に位置する検出電界効果トランジスタ(検出FET)であって、
前記検出FETが、前記電流の流れの係数倍部分を検出する、および、第1のノードに電流信号を出力する、
前記検出FETと、
接合型電界効果トランジスタ(JFET)であって、
前記JFETのドレインが、前記パワートランジスタデバイスのドレインに接続されており、前記JFETのゲートが、前記パワートランジスタデバイスのソースに接続されていることにより、前記パワートランジスタデバイスがオンに切り替えられたとき、前記JFETもオンに切り替えられ、および、前記パワートランジスタデバイスのドレイン電圧信号が第2のノードに出力される、
前記JFETと、
前記ドレイン電圧信号と前記電流信号とを受信するように結合された検出回路であって、
前記ドレイン電圧信号が、基準電圧信号を上回り、かつ、前記電流信号が、基準電流信号を上回ったとき、前記パワートランジスタデバイスのドレイン・ソース抵抗が組み合わされた閾値限界を上回ったことを示す警報信号を、前記検出回路が出力する、
前記検出回路と、
を備える、IC。 - 前記温度上昇が前記パワートランジスタデバイスの熱閾値を上回ったことを、前記警報信号が示す、
請求項1に記載のIC。 - 前記パワートランジスタデバイスにおける前記電流の流れが校正電流閾値に既に達しているときの値に、前記基準電流信号が設定された、
請求項1に記載のIC。 - 前記パワートランジスタデバイスの温度限界を示す前記ドレイン電圧信号の校正閾値に前記ドレイン・ソース抵抗が既に達しているときの値に、前記基準電圧信号が設定された、
請求項1に記載のIC。 - 前記検出回路が、
前記ドレイン電圧信号を受信するように結合された第1の入力と、前記基準電圧信号を受信するように結合された第2の入力と、を含む第1の比較器であって、
前記ドレイン電圧信号が、前記基準電圧信号を上回ったとき、前記第1の比較器が、第1の論理信号を出力する、
前記第1の比較器と、
前記電流信号を受信するように結合された第1の入力と、前記基準電流信号を受信するように結合された第2の入力と、を含む第2の比較器であって、
前記電流信号が、前記基準電流信号を上回ったとき、前記第2の比較器が、第2の論理信号を出力する、
前記第2の比較器と、
を備える、
請求項1に記載のIC。 - 前記検出回路が、前記第1の論理信号を受信するように結合された入力と、前記第2の論理信号を受信するように結合されたクロック入力と、を含むフリップフロップをさらに備え、
前記フリップフロップが、前記第1の論理信号と前記第2の論理信号とに応答して、前記警報信号を出力する、
請求項5に記載のIC。 - 前記フリップフロップが、D型フリップフロップである、
請求項6に記載のIC。 - 前記第1のノードとグランド電位との間に結合された検出抵抗器をさらに備える、
請求項1に記載のIC。 - 前記第1のノードが、前記検出FETのソースを含み、
前記第2のノードが、前記JFETのソースである、
請求項1に記載のIC。 - 前記JFETの前記ゲートと前記パワートランジスタデバイスの前記ソースとの両方が、グランド電位に接続された、
請求項1に記載のIC。 - 前記パワートランジスタデバイスの前記ドレインが、電力コンバーターエネルギー伝達要素に結合された、
請求項1に記載のIC。 - 前記警報信号が、前記パワートランジスタデバイスをオフに切り替えるために使用される、
請求項1に記載のIC。 - 前記検出回路が、前記パワートランジスタデバイスにおける、所定のゲート・ソース電圧、および所定の電流の流れにおいて、前記電圧信号および前記電流信号を受信する、
請求項1に記載のIC。 - スイッチングデバイスにおける電流の流れにより温度上昇がもたらされる、前記スイッチングデバイスにおける前記温度上昇を検出するための集積回路(IC)であって、前記ICが、
前記電流の流れの係数倍部分を検出する、および、第1のノードに電流信号を出力する、電流検出デバイスと、
電圧検出デバイスであって、
前記スイッチングデバイスがオンに切り替えられたとき、前記電圧検出デバイスもオンに切り替えられるように、および、前記スイッチングデバイスの電圧信号が第2のノードに出力されるように、前記電圧検出デバイスが、前記スイッチングデバイスに結合された、
前記電圧検出デバイスと、
前記電圧信号および前記電流信号を受信するように結合された検出回路であって、
前記電圧信号が基準電圧信号を上回り、かつ、前記電流信号が基準電流信号を上回ったとき、前記検出回路が、警報信号を出力する、
前記検出回路と、
を備える、IC。 - 前記スイッチングデバイスの熱閾値を前記温度上昇が上回ったことを、前記警報信号が示す、
請求項14に記載のIC。 - 前記スイッチングデバイスにおける前記電流の流れが校正電流閾値に既に達しているときの値に、前記基準電流信号が設定された、
請求項14に記載のIC。 - 前記電流検出デバイスが、検出電界効果トランジスタ(検出FET)であり、
前記電圧検出デバイスが、接合型電界効果トランジスタ(JFET)である、
請求項14に記載のIC。 - 前記検出回路が、
前記電圧信号を受信するように結合された第1の入力と、前記基準電圧信号を受信するように結合された第2の入力と、を含む第1の比較器であって、
前記電圧信号が前記基準電圧信号を上回ったとき、前記第1の比較器が、第1の論理信号を出力する、
前記第1の比較器と、
前記電流信号を受信するように結合された第1の入力と、前記基準電流信号を受信するように結合された第2の入力と、を含む第2の比較器であって、
前記電流信号が前記基準電流信号を上回ったとき、前記第2の比較器が、第2の論理信号を出力する、
前記第2の比較器と、
前記第1の論理信号を受信するように結合された入力と、前記第2の論理信号を受信するように結合されたクロック入力と、を含むフリップフロップであって、
前記フリップフロップが、前記第1の論理信号と前記第2の論理信号とに応答して、前記警報信号を出力する、
前記フリップフロップと、
を備える、
請求項14に記載のIC。 - 前記第1のノードとグランド電位との間に結合された検出抵抗器をさらに備える、
請求項14に記載のIC。 - 前記第1のノードが、前記検出FETのソースを含む、
請求項17に記載のIC。 - 前記スイッチングデバイスが、パワートランジスタデバイスである、
請求項14に記載のIC。 - 前記スイッチングデバイスが、1つまたは複数のダイオードを備える、
請求項14に記載のIC。 - 前記検出回路が、前記スイッチングデバイスの所定の閾動作状態において前記電圧信号および前記電流信号を受信する、
請求項14に記載のIC。 - 半導体スイッチングデバイスにおける電流の流れにより温度上昇がもたらされる、集積回路(IC)の半導体スイッチングデバイスにおける前記温度上昇を検出する方法であって、前記方法が、
前記半導体スイッチングデバイスを通る前記電流の流れの係数倍部分を検出することであって、
前記電流の流れの前記係数倍部分を検出したことに応答して、電流信号が、第1のノードに出力される、
前記電流の流れの前記係数倍部分を検出することと、
前記半導体スイッチングデバイスがオンに切り替えられたとき、前記半導体スイッチングデバイスにおける電圧降下を検出することであって、
前記電圧降下を検出したことに応答して、前記半導体スイッチングデバイスの電圧信号が、第2のノードに出力される、
前記電圧降下を検出することと、
前記電圧信号および前記電流信号を受信するように結合された検出回路により警報信号を出力することであって、
前記電圧信号が基準電圧信号を上回り、かつ、前記電流信号が基準電流信号を上回ったとき、前記検出回路が、前記警報信号を出力する、
前記警報信号を出力することと、
を含む、方法。 - 前記温度上昇が前記半導体スイッチングデバイスの熱閾値を上回ったことを、前記警報信号が示す、
請求項24に記載の方法。 - 前記半導体スイッチングデバイスにおける前記電流の流れが校正電流閾値に既に達しているときの値に、前記基準電流信号が設定された、
請求項24に記載の方法。 - 前記電圧信号が前記半導体スイッチングデバイスの校正閾値に既に達しているときの値に、前記基準電圧信号が設定された、
請求項24に記載の方法。 - 前記検出回路が、前記半導体スイッチングデバイスの所定の閾動作状態において前記電圧信号および前記電流信号を受信したとき、前記警報信号が出力される、
請求項24に記載の方法。
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