公开(公告)号：JPH07169582A

公开(公告)日：1995-07-04

申请号：JP23489594

申请日：1994-09-29

Applicant: MARELLI AUTRONICA

Inventor： ANDOREA NEPOTE ,  DARIO DEKURUTEI

IPC: H05B41/282 ,  H05B41/288 ,  H05B41/38 ,  H05B41/29

Abstract: PURPOSE: To reduce the dimension of the whole of a device so as to miniaturize a circuit by providing plural switching DC/DC converters, a bridge switching circuit and an electronic control unit. CONSTITUTION: A fly back DC/DC converter CC1 and a feed forward DC/DC converter CC2 are provided. Each converter CC1, CC2 has inputs 1, 2 respectively connected to a battery B for an automobile, which forms a direct current voltage source. Output of the converter CC2 is connected to an H-type bridge switching circuit HB, and the circuit HB has four MOSFET transistors M1-M4, which form a switch. An electronic control unit ECU drives each converter so that the converter CC1 is firstly operated by the generation of high voltage per each time of closing a switch of a gas discharge lamp L, and continuously, so that the converter CC2 is operated so as to generate the large power in spite of a low voltage.