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Part Manufacturer: ST Microelectronics

Part Description: High voltage fast-switching NPN power transistor

Part Details:

® BUL89 HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR s HIGH VOLTAGE CAPABILITY s MINIMUM LOT-TO-LOT SPREAD FORRELIABLE OPERATION s LOW BASE-DRIVE REQUIREMENTS s VERY HIGH SWITCHING SPEED s FULLY CHARACTERIZED AT 125oC APPLICATIONS s ELECTRONIC TRANSFORMER FOR 3 HALOGEN LAMPS 2 1 s SWITCH MODE POWER SUPPLIES DESCRIPTION TO-220 The BUL89 is manufactured using high voltageMultiepitaxial Mesa technology for cost-effectivehigh performance. It uses a Hollow Emitterstructure to enhance switching speeds. The BUL series is designed for use in lightingapplications and low cost switch-mode power INTERNAL SCHEMATIC DIAGRAM supplies. ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VCES Collector-Emitter Voltage (VBE = 0) 850 V VCEO Collector-Emitter Voltage (IB = 0) 400 V VEBO Emitter-Base Voltage (IC = 0) 9 V IC Collector Current 12 A ICM Collector Peak Current (tp < 5 ms) 25 A IB Base Current

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