SEMICONDUCTOR DEVICE, POWER MODULE, INVERTER DEVICE, AND ELECTRIC VEHICLE

• Main Authors: ARAKI TAKAHIRO, MIMA AKIRA, MAEKAWA NORIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 27.09.2021
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

To solve a problem that variations occur in a clamp voltage due to increase of a voltage drop occurring in a thermistor when a value of a current flowing in the thermistor increases.SOLUTION: A semiconductor device includes a switching element to be on/off controlled, and a surge voltage protection circuit which is connected between a positive pole side terminal of the switching element and a control terminal of the switching element. The surge voltage protection circuit is composed of a first Zener diode, a second Zener diode connected to the first Zener diode in series, and a temperature characteristic compensation element which has a polarity of a temperature factor different from that of the first Zener diode and the second Zener diode and is connected to the second Zener diode in parallel.SELECTED DRAWING: Figure 1 【課題】サーミスタを流れる電流値が大きくなった場合に、サーミスタで発生する電圧降下が増大し、クランプ電圧にばらつきが発生する課題があった。【解決手段】オンオフ制御されるスイッチング素子と、前記スイッチング素子の正極側端子と前記スイッチング素子の制御端子との間に接続されるサージ電圧保護回路と、を備え、前記サージ電圧保護回路は、第１ツェナーダイオードと、前記第１ツェナーダイオードと直列に接続される第２ツェナーダイオードと、前記第１ツェナーダイオードおよび前記第２ツェナーダイオードとは温度係数の極性が異なり、かつ前記第２ツェナーダイオードに並列に接続される温度特性補償素子と、により構成される半導体装置。【選択図】図１