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HGTG24N60D1
FIGURE 9. TURN-OFF DELAY vs COLLECTOR-EMITTER
CURRENT
FIGURE 10. OPERATING FREQUENCY vs COLLECTOR-
EMITTER CURRENT AND VOLTAGE
Typical Performance Curves
(Continued)
1
10
40
T
J
= +150
o
C
R
GE
= 25
L = 500
μ
H
I
CE
, COLLECTOR-EMITTER CURRENT (A)
V
CE
= 480V, V
GE
= 10V
1300
1200
1100
1000
900
800
700
600
500
400
300
V
CE
= 480V, V
GE
= 15V
V
CE
= 240V, V
GE
= 10V
V
CE
= 240V, V
GE
= 15V
t
D
,
80
10
1
f
O
,
1
10
50
I
CE
, COLLECTOR-EMITTER CURRENT (A)
T
J
= +150
o
C, T
C
= +100
o
C,
R
GE
= 25
, L = 500
μ
H
V
CE
= 480V, V
GE
= 10V, 15V
f
MAX1
= 0.05/t
D(OFF)I
f
MAX2
= (P
D
- P
C
)/W
OFF
P
C
= DUTY FACTOR = 50%
R
θ
JC
= 1.0
o
C/W
P
D
= ALLOWABLE DISSIPATION
P
C
= CONDUCTION DISSIPATION
NOTE:
V
CE
= 240V, V
GE
= 10V, 15V
Operating Frequency Information
Operating frequency information for a typical device (Figure
10) is presented as a guide for estimating device performance
for a specific application. Other typical frequency vs collector
current (I
CE
) plots are possible using the information shown
for a typical unit in Figures 7, 8 and 9. The operating
frequency plot (Figure 10) of a typical device shows f
MAX1
or
f
MAX2
whichever is smaller at each point. The information is
based on measurements of a typical device and is bounded
by the maximum rated junction temperature.
f
MAX1
is defined by f
MAX1
= 0.05/t
D(OFF)I
. t
D(OFF)I
deadtime
(the denominator) has been arbitrarily held to 10% of the on-
state time for a 50% duty factor. Other definitions are possible.
t
D(OFF)I
is defined as the time between the 90% point of the
trailing edge of the input pulse and the point where the
collector current falls to 90% of its maximum value. Device
turn-off delay can establish an additional frequency limiting
condition for an application other than T
JMAX
. t
D(OFF)I
is
important when controlling output ripple under a lightly loaded
condition.
f
MAX2
is defined by f
MAX2
= (P
D
- P
C
)/W
OFF
. The allowable
dissipation (P
D
) is defined by P
D
= (T
JMAX
- T
C
)/R
θ
JC
. The sum
of device switching and conduction losses must not exceed P
D
.
A 50% duty factor was used (Figure 10) and the conduction
losses (P
C
) are approximated by P
C
= (V
CE
I
CE
)/2. W
OFF
is
defined as the integral of the instantaneous power loss starting
at the trailing edge of the input pulse and ending at the point
where the collector current equals zero (I
CE
= 0A).
The switching power loss (Figure 10) is defined as f
MAX2
W
OFF
.
Turn-on switching losses are not included because they can be
greatly influenced by external circuit conditions and components.