| 摘要 |
A low side switching driver circuit (50) includes an emitter follower circuit, an input buffer (51), and a power source (52) and capacitors (53, 54) for driving these circuits. The power source (52) is not provided for each one of low side switching elements (5, 6, 7), but the low side switching elements (5, 6, 7) use the power source (52) as a common power source thereamong. A resistor (58) is provided between the node between the negative pole of the capacitor (53) and a first low potential power source line, and a second low potential power source line (G) of the low side switching driver circuit. The capacitor (54) is connected to the input buffer (51). Resistors (59, 60) as current limiting elements are provided between the input buffer (51) and the power source (52). TITLE OF THE INVENTION
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