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Switching circuit apparatus capable of controlling multiple switching elements to synchronously turn on and off with bootstrap circuit

專利號
US12160230B2
公開日期
2024-12-03
申請人
OMRON Corporation（JP Kyoto）
發(fā)明人
Noriyuki Nosaka; Junya Mishima; Mamoru Sueki; Wataru Okada
IPC分類
H03K17/687; H02M1/00; H02M3/156; H03K19/017
技術(shù)領(lǐng)域
switching,circuit,capacitor,voltage,diode,dc,q1,zener,q2,drv1
地域： Kyoto

摘要

In a switching circuit apparatus, first and second capacitors apply power supply voltages to first and second drive circuits. First and second diodes are connected such that currents flow from a DC voltage source to the first and second capacitors. A resistor and a Zener diode are connected in series between a terminal and a node, such that a reverse bias voltage is applied from the terminal to the Zener diode via the resistor. A third diode is connected such that a current flows to the first capacitor from a node (N2) between the resistor and the Zener diode.

說明書

On the other hand, since the switching circuit apparatus 1 of FIG. 1 is provided with the resistor R1, the Zener diode ZD1, and the diode D3, a current flows from the terminal P1 to the capacitor C1 via the resistor R1 and the diode D1 when the switching elements Q1 and Q2 are turned off. Specifically, when the switching elements Q1 and Q2 are turned off, currents flow through the capacitors C1 and C2 along the following paths.

    • (a) Positive electrode of DC voltage source E1→resistor R5→diode D1→capacitor C1→resistor R2→diode D4→capacitor C2→negative electrode of DC voltage source E1
    • (b) Positive electrode of DC voltage source E1→diode D2→capacitor C2→negative electrode of DC voltage source E1
    • (c) Terminal P1→resistor R1→diode D3→capacitor C1→resistor R2→diode D4→capacitor C2→terminal P2

When the switching elements Q1 and Q2 are turned on, currents flow through the capacitors C1 and C2 along the following paths.

    • (d) Positive electrode of DC voltage source E1→resistor R5→diode D1→capacitor C1→switching element Q2→negative electrode of DC voltage source E1

權(quán)利要求

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