| 摘要 |
PURPOSE: A DA conversion driving unit and a DC-DC converting apparatus are provided to minimize damage to MOSFET. CONSTITUTION: A PWM generator generates a PWM signal. A pulse transformer(120) comprises a primary side coil(122) and secondary side coils(124,126). A PWM signal is input into the primary side coil. The secondary side coils divide the pressure of PWM signal and output the signal. A driving circuit generates driving voltage. The driving voltage operates a DA convertor part. [Reference numerals] (AA) Bobbin
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