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                                                                                           BUL49D
                                                                                          BULB49D

                             High voltage fast-switching NPN power transistors

Features
   High voltage capability
   Low spread of dynamic parameters
   Minimum lot-to-lot spread for reliable operation                                 3
                                                                                                                2
                                                                                                                    3
                                                                                2                           1
                                                                            1
   Very high switching speed                                                                   TO-220FP
                                                                TO-220
   High ruggedness

Applications
                                                                                3
   Electronic transformers for halogen lamps                            1                                     3
                                                                                                           12
   Flyback and forward single transistor low                    D2PAK                              I2PAK
   power converters

Description                                              Figure 1.          Internal schematic diagram
The devices are manufactured using high voltage
multi-epitaxial planar technology for high
switching speeds and high voltage capability. The
devices are designed for use in electronic
transformer for halogen lamps.




Table 1.     Device summary
   Order code          Marking                        Package                            Packaging

    BUL49D             BUL49D                         TO-220                                Tube
   BUL49DFP          BUL49DFP                       TO-220FP                                Tube

   BULB49D-1          BULB49D                          I2PAK                                Tube

   BULB49DT4          BULB49D                         D2PAK                             Tape and reel




June 2008                                           Rev 3                                                       1/15
                                                                                                        www.st.com      15
Contents                                                                                               BUL49D - BULB49D


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          Packaging information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5          Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14




2/15
BUL49D - BULB49D                                                                       Electrical ratings


1        Electrical ratings

         Table 2.     Absolute maximum ratings
                                                                               Value

          Symbol                        Parameter                    D2PAK                         Unit
                                                                     I2PAK             TO-220FP
                                                                    TO-220

           VCES     Collector-emitter voltage (VBE =0)                          850                 V
           VCEO     Collector-emitter voltage (IB =0)                           450                 V
                    Emitter-base voltage (IC =0, IB <2 A,
           VEBO                                                              V(BR)EBO               V
                    tP < 10 ms)
            IC      Collector current                                            5                  A
            ICM     Collector peak current (tP < 5ms)                           10                  A
             IB     Base current                                                 2                  A
            IBM     Base peak current (tP < 5 ms)                                4                  A
            Ptot    Total dissipation at Tc 25



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