BU323Z Datasheet, PDF (4/6 Pages) Motorola, Inc – AUTOPROTECTED DARLINGTON 10 AMPERES 360-450 VOLTS CLAMP 150 WATTS

BU323Z
IC
ICPEAK
IC
ICPEAK
Figure 4a.
IC HIGH
IC LOW
VCE
VGATE MIN
The shaded area represents the amount of energy the de-
vice can sustain, under given DC biases (IC/IB/VBE(off)/
RBE), without an external clamp; see the test schematic dia-
gram, Figure 2.
The transistor PASSES the Energy test if, for the inductive
load and ICPEAK/IB/VBE(off) biases, the VCE remains outside
the shaded area and greater than the VGATE minimum limit,
Figure 4a.
IC HIGH
IC
ICPEAK
Figure 4b.
IC LOW
VCE
VGATE MIN
IC HIGH
The transistor FAILS if the VCE is less than the VGATE
(minimum limit) at any point along the VCE/IC curve as
shown on Figures 4b, and 4c. This assures that hot spots
and uncontrolled avalanche are not being generated in the
die, and the transistor is not damaged, thus enabling the
sustained energy level required.
IC
ICPEAK
Figure 4c.
IC LOW
VCE
VGATE MIN
IC HIGH
The transistor FAILS if its Collector/Emitter breakdown
voltage is less than the VGATE value, Figure 4d.
Figure 4d.
IC LOW
VCE
VGATE MIN
Figure 4. Energy Test Criteria for BU323Z
4
Motorola Bipolar Power Transistor Device Data