1/8February 2005
nSTMicroelectronics PREFERRED SALES
TYPE
nNPN TRANSISTOR
nHIGH VOLTAGE CAPABILITY
nLOW SPREAD OF DYNAMIC PARAMETERS
nMINIMUM LOT-TO-LOT SPREAD FOR
RELIABLE OPERATION
n VERY HIGH SWITCHING SPEED
nINTEGRATED ANTIPARALLEL
COLLECTOR- EMITTER DIODE
APPLICATIONS
nELECTRONIC BALLAST FOR
FLUORESCENT LIGHTING
nFLYBACK AND FORWARD SINGLE
TRANSISTOR LOW POWER CONVERTERS
DESCRIPTION
The device is manufactured using high voltage
Multi Epitaxial Planar technology for high
switching speeds and medium voltage capability.
It uses a Cellular Emitter structure with planar
edge termination to enhance switching speeds
while maintaining the wide RBSOA.
The device is designed for use in lighting
applications and low cost switch-mode power
supplies.
Figure 1: Package
Figure 2: Internal Schematic Diagram
Table 1: Order Codes
Table 2: Absolute Maximum Ratings
2
TO-220
Part Number Marking Package Packaging
BUL128D-B BUL128D-B TO-220 Tube
Symbol Parameter Value Unit
VCES Collector-Emitter Voltage (VBE = 0) 700 V
VCEO Collector-Emitter Voltage (IB = 0) 400 V
VEBO Emitter-Base Voltage
(IC= 0, IB = 2 A, tp < 10 µs, TJ = 150 oC)
V(BR)EBO V
ICCollector Current 4A
ICM Collector Peak Current (tp < 5ms) 8A
IBBase Current 2A
IBM Base Peak Current (tp < 5ms) 4A
BUL128D-B
HIGH VOLTAGE FAST-SWITCHING
NPN POWER TRANSISTOR
Rev. 2