BU505
HIGH VOLTAGE NPN MULTIEPITAXIAL
FAST-SWITCHING TRANSISTOR
a73 HIGH VOLTAGE CAPABILITY
a73 VERY HIGH SWITCHING SPEED
a73 LOW BASE-DRIVE REQUIREMENTS
APPLICATIONS
a73 ELECTRONIC BALLASTS FOR
FLUORESCENT LIGHTING
a73 SWITCH MODE POWER SUPPLIES
DESCRIPTION
The BU505 is a high voltage NPN fastswitching
transistor designed to be used in lighting
application, like electronic ballas for fluorescent
lamps.
Its characteristics make it also ideal for power
supplies.
INTERNAL SCHEMATIC DIAGRAM
July 1997
1
2
3
TO-220
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
CES
Collector-Emitter Voltage (V
BE
= 0) 1500 V
V
CEO
Collector-Emitter Voltage (I
B
= 0) 700 V
I
C
Collector Current 2.5 A
I
CM
Collector Peak Current (t
p
< 5 ms) 4 A
IB Base Current 1 A
IBM Base Peak Current (tp < 5 ms) 2 A
P
tot
Total Dissipation at T
c
≤ 25
o
C75W
T
stg
Storage Temperature -65 to 150
o
C
T
j
Max. Operating Junction Temperature 150
o
C
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