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2STD1665 Low voltage fast-switching NPN power transistor Features Very low collector to emitter saturation volatage High current gain characteristic 3 3 Fast-switching speed 2 1 1 Through-hole IPAK (TO-251) power package in tube (suffix"-1") IPAK DPAK Surface mounting DPAK (TO-252) power TO251 TO252 package in tape & reel (suffix"T4") ( Suffix "-1" ) ( Suffix "T4" ) Applications Ccfl drivers Figure 1. Internal schematic diagram Voltage regulators Relay drivers High efficiency low voltage switching applications Description The device is manufactured in NPN Planar Technology by using a "Base Island" layout. The resulting transistor shows exceptional high gain performance coupled with very low saturation voltage. Table 1. Device summary Order code Marking Package Packing 2STD1665T4 D1665 DPAK Tape & reel 2STD1665-1 D1665 IPAK Tube March 2008 Rev 2 1/11 www.st.com 11 2STD1665 Contents 1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Electrical characteristics (curves) ... 5 2.2 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2/11 2STD1665 1 Electrical ratings Table 2. Absolute maximum rating Symbol Parameter Value Unit VCBO Collector-bas