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BULK128 High voltage fast-switching NPN power transistor Features High voltage capability Minimum lot-to-lot spread for reliable operation Very high switching speed Applications 3 2 Electronic ballast for fluorescent lighting 1 SOT-82 Description The device is manufactured using high voltage multi-epitaxial planar technology for high switching speeds and medium voltage capability. It uses a cellular emitter structure with planar Figure 1. Internal schematic diagram edge termination to enhance switching speeds while maintaining the wide RBSOA. The device is designed for use in lighting applications and low cost switch-mode power supplies. Table 1. Device summary Order code Marking Package Packaging BULK128 BULK128 SOT-82 Tube June 2008 Rev 2 1/11 www.st.com 11 Contents BULK128 Contents 1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Electrical characteristics (curves) ... 5 3 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2/11 BULK128 Electrical ratings 1 Electrical ratings Table 2. Absolute maximum rating Symbol Parameter Value Unit VCES Collector-emitter voltage (VBE = 0) 700 V VCEO Collector-emitter voltage (IB = 0) 400 V VEBO Emitter-base voltage (IC= 0, IB= 2 A, tp< 10