SEMICONDUCTOR DEVICE, LOAD DRIVING SYSTEM, AND CURRENT DETECTION METHOD FOR INDUCTOR CURRENT

To provide a semiconductor device capable of detecting inductor current with high accuracy.SOLUTION: In one semiconductor chip, driving transistors (QH, QL), current sensors ISEN(h/l), and temperature sensors TSENd (h/l) for detecting temperatures in a driver region AR1 are arranged in the driver re...

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Bibliographic Details
Main Author TAJIMA HIDEYUKI
Format Patent
LanguageEnglish
Japanese
Published 08.08.2019
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Summary:To provide a semiconductor device capable of detecting inductor current with high accuracy.SOLUTION: In one semiconductor chip, driving transistors (QH, QL), current sensors ISEN(h/l), and temperature sensors TSENd (h/l) for detecting temperatures in a driver region AR1 are arranged in the driver region AR1. In the peripheral circuit region AR2, a current detection circuit CS, an analog-to-digital converter ADCc, and a temperature sensor TSENc for detecting the temperature in the peripheral circuit region AR2 are arranged. The correction circuit section CALU corrects the digital detection voltage DVIS from the analog-to-digital converter ADCc based on the detection results of the temperature sensors TSENd(h/l) and the temperature sensor TSENc.SELECTED DRAWING: Figure 3 【課題】インダクタ電流を高精度に検出することが可能な半導体装置を提供する。【解決手段】一つの半導体チップにおいて、ドライバ領域AR1には、駆動用トランジスタ(QH,QL)と、電流センサISEN(h/l)と、ドライバ領域AR1の温度を検出する温度センサTSENd(h/l)とが配置される。周辺回路領域AR2には、電流検出回路CSと、アナログディジタル変換器ADCcと、周辺回路領域AR2の温度を検出する温度センサTSENcとが配置される。補正回路部CALUは、温度センサTSENd(h/l)の検出結果と、温度センサTSENcの検出結果とに基づいて、アナログディジタル変換器ADCcからのディジタル検出電圧DVISを補正する。【選択図】図3
Bibliography:Application Number: JP20180012966