Typical Connection
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Connection Notes:
5
If a large voltage spike is generated at the IGBT collector, the value of
To minimize the potential for problems (and/or failures) caused by induced
the gate resistor (R
G
) should be increased.
noise, EMI interference and/or oscillation, the connection of the gate driver
6
The
IGD1205W
includes an internal DC/DC converter that provides
must be done with great care. Some recommendations would include:
isolated gate drive power at pin 9 (V
CC
, 15V) and pin 7 (V
EE
, -8V).
These outputs share a common ground at pin 8. This allows the IGD
1
The
D200E
is a 2W DC/DC converter. It will convert a 5, 12, or 24V bus
to provide a floating gate drive suitable for high or low side switching.
voltage to the 12 or 15V needed to power the
IGD1205W.
The
SR7805
Low impedance electrolytic capacitors (C
6
and C
7
) are used to decouple
is a switching POL regulator. It provides a stable 5V input signal voltage
the internal supply outputs. It is important that these components be
to the input (pin 14) of the
IGD1205W.
selected for low impedance and a maximum allowable ripple current
2
The input signal voltage (pin 14) cannot exceed 5.0V. The internal
that is sufficinet for the application. Assuming the ripple current in the
dissipation caused by the resultant increase in input current could
decoupling capacitors is about equal to the rms gate current, it can
damage the input optocoupler. A current limiting resistor (R
1
) is used
be estimated by the formula:
to help prevent this. The resistor value is calculated by the formula:
8
The voltage level at pin 4 could go “High” depending on the reverse
recovery characteristics of D
1
. A 30V zener diode DZ
1
is connected
between pin 4 and pin 7 to prevent any problems caused by this.
9
If the short cicuit protection circuit is not used, a 4.7 k
should be connected between pin 4 and pin 8.
10
The
IGD1205W
has a short circuit detection time delay of 1.6
µS.
Sufficient for most applications. If required, this can be extended by
connecting a capacitor (C
TRIP
) between pin 1 and pin 9. Contact the
factory for details. If used, C
TRIP
should be mounted as close to the
driver as possible.
11
To help limit any transient voltage surges that could occur when a shor
circuit is interrupted, a soft shutdown is provided by the
IGD1205W.
The default time is set to 4.5
µS,
but it can be adjusted from 2.5
µS
to 10
µS
by using either CF or RF. Contact the factory for details.
i
RMS
=
i
P
t
P
x
f
R
1
= V
IN
- 1.7V - 150
X
3
12
If the
IGD1205W
short circuit protection is activated, it will immediately
16 mA
Where
i
P
= peak current;
t
P
= base width of pulse; and
f
= frequency.
shut down the gate drive and pull pin 2 low to indicate a fault (via OP
1
).
3
The gate wiring of the IGBT gate-emitter drive loop must be shorter
Capacitors C
6
and C
7
should be mounted as close to the driver as
During normal operation, the collector of OP
1
is pulled high by R
2
. In
than 1 meter.
possible.
the event of a fault, the driver output is disabled and a fault signal is
4
Twisted pair wiring is recommended for the gate-emitter drive loop to
7
The peak reverse voltage rating of D
1
must be higher than the peak
produced that lasts a minimum of 1 mS. The RC filter (C
5
and R
3
) help
minimize mutual induction.
value of the IGBT collector voltage.
provide noise immunity. If the short circuit protection circuit is not used,
these components can be eliminated and pin 2 should be left open.
Mechanical Dimensions
Model Selection Guide
Model Number Input Power
(V
DD
)
IGD1205W-12
IGD1205W-15
12 VDC
15 VDC
Pin Connections
Pin
1
2
3
4
5
6
7
Function
Control Pin
(ForT
TRIP
)
Fault Signal Output
Soft Turn-Off Adj
Fault Detection
Internal Power Tube
Drive Output
DC/DC Ouput
(-)
Pin
8
9
13
14
15
16
Function
DC/DC Ouput
(Comm)
DC/DC Ouput
(+)
Drive Signal Input
(-)
Drive Signal Input
(+)
-V
DD (- Power Supply)
+V
DD (+ Power Supply)
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292 Page Street Ste D Stoughton, MA 02072
•
Notes:
•
All dimensions are typical in inches (mm)
•
Tolerance x.xx =
±
0.01 (
±
0.25)
TEL: (781) 344-8226
•
FAX: (781) 344-8481
•
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