HGTG20N60A4, HGTP20N60A4
Handling Precautions for IGBTs
Operating Frequency Information
Insulated Gate Bipolar Transistors are susceptible to
gate-insulation damage by the electrostatic discharge of
energy through the devices. When handling these devices,
care should be exercised to assure that the static charge
built in the handler’s body capacitance is not discharged
through the device. With proper handling and application
procedures, however, IGBTs are currently being extensively
used in production by numerous equipment manufacturers in
military, industrial and consumer applications, with virtually
no damage problems due to electrostatic discharge. IGBTs
can be handled safely if the following basic precautions are
taken:
Operating frequency information for a typical device
(Figure 3) is presented as a guide for estimating device
performance for a specific application. Other typical
frequency vs collector current (I ) plots are possible using
CE
the information shown for a typical unit in Figures 6, 7, 8, 9
and 11. The operating frequency plot (Figure 3) of a typical
device shows f
or f ; whichever is smaller at each
MAX1
MAX2
point. The information is based on measurements of a
typical device and is bounded by the maximum rated
junction temperature.
f
is defined by f
= 0.05/(t
MAX1
+ t ).
d(OFF)I d(ON)I
MAX1
Deadtime (the denominator) has been arbitrarily held to 10%
of the on-state time for a 50% duty factor. Other definitions
1. Prior to assembly into a circuit, all leads should be kept
shorted together either by the use of metal shorting
springs or by the insertion into conductive material such
as “ECCOSORBD™ LD26” or equivalent.
are possible. t
and t are defined in Figure 21.
d(OFF)I
d(ON)I
Device turn-off delay can establish an additional frequency
limiting condition for an application other than T
.
JM
+ E
2. When devices are removed by hand from their carriers,
the hand being used should be grounded by any suitable
means - for example, with a metallic wristband.
f
is defined by f
MAX2
= (P - P )/(E
OFF
). The
ON2
MAX2
D
C
allowable dissipation (P ) is defined by P = (T - T )/R
.
D
D
JM θJC
C
The sum of device switching and conduction losses must not
exceed P . A 50% duty factor was used (Figure 3) and the
3. Tips of soldering irons should be grounded.
D
4. Devices should never be inserted into or removed from
circuits with power on.
conduction losses (P ) are approximated by
C
P = (V x I )/2.
C
CE CE
5. Gate Voltage Rating - Never exceed the gate-voltage
E
and E are defined in the switching waveforms
OFF
rating of V
. Exceeding the rated V can result in
ON2
GEM
GE
permanent damage to the oxide layer in the gate region.
shown in Figure 21. E
is the integral of the
ON2
instantaneous power loss (I
x V ) during turn-on and
6. Gate Termination - The gates of these devices are
essentially capacitors. Circuits that leave the gate
open-circuited or floating should be avoided. These
conditions can result in turn-on of the device due to
voltage buildup on the input capacitor due to leakage
currents or pickup.
CE
CE
E
is the integral of the instantaneous power loss
OFF
(I
x V ) during turn-off. All tail losses are included in the
CE
CE
calculation for E
; i.e., the collector current equals zero
OFF
(I
= 0).
CE
7. Gate Protection - These devices do not have an internal
monolithic Zener diode from gate to emitter. If gate
protection is required an external Zener is recommended.
©2001 Fairchild Semiconductor Corporation
HGTG20N60A4, HGTP20N60A4 Rev. B