BULD25D, BULD25DR, BULD25SL
NPN SILICON TRANSISTOR WITH INTEGRATED DIODE
Copyright © 1997, Power Innovations Limited, UK
JULY 1994 - REVISED SEPTEMBER 1997
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Designed Specifically for High Frequency
Electronic Ballasts
D PACKAGE
(TOP VIEW)
Integrated Fast t Anti-parallel Diode,
1
2
3
4
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8
7
6
5
C
C
C
C
B
NC
NC
E
Enhancing Reliability
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Diode t Typically 500 ns
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New Ultra Low-Height SOIC Power Package
Tightly Controlled Transistor Storage Times
NC - No internal connection
Voltage Matched Integrated Transistor and
Diode
SL PACKAGE
(TOP VIEW)
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Characteristics Optimised for Cool Running
1
2
3
B
C
E
Diode-Transistor Charge Coupling
Minimised to Enhance Frequency Stability
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Custom Switching Selections Available
Surface Mount and Through-Hole Options
PACKAGE
Small-outline
Small-outline taped
and reeled
PART # SUFFIX
device symbol
D
C
DR
SL
Single-in-line
B
description
The new BULDxx range of transistors have been
designed specifically for use in High Frequency
Electronic Ballasts (HFEB’s). This range of
switching transistors has tightly controlled
E
storage times and an integrated fast t anti-parallel diode. The revolutionary design ensures that the diode
rr
has both fast forward and reverse recovery times, achieving the same performance as a discrete anti-parallel
diode plus transistor.
The integrated diode has minimal charge coupling with the transistor, increasing frequency stability,
especially in lower power circuits where the circulating currents are low. By design, this new device offers a
voltage matched integrated transistor and anti-parallel diode.
This device is available in the now well established 8 pin low height surface mount D package, and the TO-
220 pin compatible SL package. Use of the SL package allows for a 40% height saving, making it ideal for
compact ballast applications.
absolute maximum ratings at 25°C ambient temperature (unless otherwise noted)
RATING
SYMBOL
VALUE
UNIT
Collector-emitter voltage (VBE = 0)
Collector-base voltage (IE = 0)
Collector-emitter voltage (IB = 0)
Emitter-base voltage
VCES
VCBO
VCEO
VEBO
600
600
400
9
V
V
V
V
P R O D U C T
I N F O R M A T I O N
Information is current as of publication date. Products conform to specifications in accordance
with the terms of Power Innovations standard warranty. Production processing does not
necessarily include testing of all parameters.
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