August 2007 Rev 2 1/11
11
BU508AF
High voltage NPN power transistor for standard
definition CRT display
Features
■ State-of-the-art technology:
– Diffused collector “Enhanced generation”
■ Stable performances versus operating
temperature variation
■ Low base-drive requirement
■ Tight h
FE
range at operating collector current
■ High ruggedness
■ Fully insulated power package U.L. compliant
Applications
■ Horizontal deflection output for CRT TV
■ Switch mode power supplies for CRT TV
Description
The BU508AF is manufactured using diffused
collector in planar technology adopting new and
enhanced high voltage structure for updated
performance to the horizontal deflection stage.
Figure 1. Internal schematic diagram
ISOWATT218FX
1
2
3
Table 1. Device summary
Order code Marking Package Packaging
BU508AF BU508AF ISOWATT218FX Tube
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