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BUF405A BUF405AFI HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTORS s HIGH SWITCHING SPEED NPN POWER TRANSISTORS s EASY TO DRIVE s HIGH VOLTAGE FOR OFF-LINE APPLICATIONS s 100 KHz SWITCHING SPEED s LOW COST DRIVE CIRCUITS s LOW DYNAMIC SATURATION 3 3 2 2 APPLICATIONS: 1 1 s SWITCH MODE POWER SUPPLIES s MOTOR DRIVERS TO-220 ISOWATT220 DESCRIPTION These Easy-to-Drive FASTSWITCH NPN power transistors are specially designed for high reliability industrial and professional power driving INTERNAL SCHEMATIC DIAGRAM applications such us motor drives and off-line switching power supplies. ETD transistors will operate using easy drive circuits at up to 100KHz; this helps to simplify designs and improve reliability. The superior switching performance and low crossover losses reduce dissipation and consequently lowers the equipment operating temperature. ABSOLUTE MAXIMUM RATINGS Symb ol Parameter Valu e Un it BUF405A BUF 405AFI Un it V CEV Collector-Emitter Voltage (VBE = -1.5 V) 1000 V V CEO Collector-Emitter Voltage (IB = 0) 450 V VEBO Emitter-Base Voltage (IC = 0) 7 V IC Collector Current 7.5 A I CM Collector Peak Current (tp < 5 ms) 15 A IB Base Current 3 A I BM Base Peak Current (tp < 5 ms) 4.5 A o P tot T otal Dissipation at Tc = 25 C 80 40 W o T s tg Storage Temperature -65 to 150 C o Tj Max O peration Junction Temperature 150 C July 1997