• Built using the advantages and compatibility
of CMOS and IXYS HDMOSTM processes
• Latch-Up Protected Over Entire
Operating Range
• High Peak Output Current: 14A Peak
• Wide Operating Range: 4.5V to 25V
• High Capacitive Load
Drive Capability: 15nF in <30ns
• Matched Rise And Fall Times
• Low Propagation Delay Time
• Low Output Impedance
• Low Supply Current
Applications
• Driving MOSFETs and IGBTs
• Motor Controls
• Line Drivers
• Pulse Generators
• Local Power ON/OFF Switch
• Switch Mode Power Supplies (SMPS)
• DC to DC Converters
• Pulse Transformer Driver
• Class D Switching Amplifiers
General Description
The IXDI414/IXDN414 is a high speed high current gate driver
specifically designed to drive the largest MOSFETs and IGBTs
to their minimum switching time and maximum practical
frequency limits. The IXDI/N414 can source and sink 14A of
peak current while producing voltage rise and fall times of less
than 30ns to drive the latest IXYS MOSFETs & IGBTs. The
input of the driver is compatible with TTL or CMOS and is fully
immune to latch up over the entire operating range. Designed
with small internal delays, a patent-pending circuit virtually
eliminates transistor cross conduction and current shootthrough. Improved speed and drive capabilities are further
enhanced by very low, matched rise and fall times.
The IXDN414 is configured as a non-inverting gate driver and
the IXDI414 is an inverting gate driver.
The IXDN414/IXDI414 family are available in standard 8 pin
P-DIP (PI), 5-pin TO-220 (CI, CM) and TO-263 (YI, YM)
surface-mount packages.
Positive power-supply voltage input. This pin provides power to the
entire chip. The rang e for this voltage is from 4.5V to 25V.
Driver Output. For application purposes, this pin is connected via an
external resistor to a Gate of a MOSFET/IGBT .
The system ground pin. Internally connected to all circuitry, this pin
provides ground reference for the entire chip. This pin should be
connected to a low noise analog ground plane for optimum
performance.
IXDX414CI
8
7
6
5
1
2
3
4
5
Vcc
OUT
GND
IN
NC
IXDX414YI
TO220 (CI, CM)
TO263 (YI, YM)
* Patent Pending
ORDERING INFORMATION
Part Number Package Type Temp. Range Configuration
Maximum Junction Temperature
Operating Temperature Range
Thermal Impedance (Junction To Case)
TO220 (CI, CM),
TO263 (YI, YM) (θ
)
JC
150oC
-40oC to 85oC
0.55oC/W
Electrical Characteristics
Unless otherwise noted, TA = 25 oC, 4.5V ≤ V
All voltage measurements with respect to GND. Device configured as described in Test Conditions.
Symbol Parameter Test Conditions Min Typ Max Units
V
IH
High input voltage 3.5 V
VIL Low input voltage 0.8 V
VIN Input voltage range -5 V
IIN Input current
VOH High output voltage V
VOL Low output voltage 0.025 V
ROH Output resistance
@ Output high
ROL Output resistance
@ Output Low
I
Peak output current VCC is 18V
PEAK
I
Continuous output
DC
current
tR Rise time
tF Fall time
t
On-time propagation
ONDLY
delay
t
Off-time propagation
OFFDLY
delay
(1)
C
(1)
C
(1)
(1)
VCC Power supply voltage 4.5 18 25 V
ICC Power supply current V
(1)
See Figures 3a and 3b
Note 1: Operating the device beyond parameters with listed “Absolute Maximum Ratings” may cause permanent damage to the device.
Typical values indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. The
guaranteed specifications apply only for the test conditions listed. Exposure to absolute maximum rated conditions for extended periods may
affect device reliability.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper ESD procedures when handling
and assembling this component.
Supply Bypassing, Grounding Practices and Output Lead inductance
When designing a circuit to drive a high speed
MOSFET utilizing the IXDN414/IXDI414, it is very
important to observe certain design criteria in
order to optimize performance of the driver.
Particular attention needs to be paid to Supply
Bypassing, Grounding, and minimizing the
Output Lead Inductance.
Say, for example, we are using the IXDN414 to
charge a 5000pF capacitive load from 0 to 25
volts in 25ns.
Using the formula: I= ∆V C / ∆t, where ∆V=25V
C=5000pF & ∆t=25ns we can determine that to
charge 5000pF to 25 volts in 25ns will take a
constant current of 5A. (In reality, the charging
current won’t be constant, and will peak
somewhere around 8A).
SUPPLY BYPASSING
In order for our design to turn the load on properly,
the IXDN414 must be able to draw this 5A of
current from the power supply in the 25ns. This
means that there must be very low impedance
between the driver and the power supply. The
most common method of achieving this low
impedance is to bypass the power supply at the
driver with a capacitance value that is a magnitude
larger than the load capacitance. Usually, this
would be achieved by placing two different types
of bypassing capacitors, with complementary
impedance curves, very close to the driver itself.
(These capacitors should be carefully selected,
low inductance, low resistance, high-pulse currentservice capacitors). Lead lengths may radiate at
high frequency due to inductance, so care should
be taken to keep the lengths of the leads between
these bypass capacitors and the IXDN414 to an
absolute minimum.
GROUNDING
In order for the design to turn the load off properly,
the IXDN414 must be able to drain this 5A of
current into an adequate grounding system. There
are three paths for returning current that need to
be considered: Path #1 is between the IXDN414
and its load. Path #2 is between the IXDN414 and
its power supply. Path #3 is between the IXDN414
and whatever logic is driving it. All three of these
paths should be as low in resistance and
inductance as possible, and thus as short as
practical. In addition, every effort should be made
to keep these three ground paths distinctly
separate. Otherwise, the returning ground current
from the load may develop a voltage that would
have a detrimental effect on the logic line driving
the IXDN414.
OUTPUT LEAD INDUCTANCE
Of equal importance to Supply Bypassing and
Grounding are issues related to the Output Lead
Inductance. Every effort should be made to keep
the leads between the driver and it’s load as short
and wide as possible. If the driver must be placed
farther than 2” (5mm) from the load, then the output
leads should be treated as transmission lines. In
this case, a twisted-pair should be considered,
and the return line of each twisted pair should be
placed as close as possible to the ground pin of
the driver, and connected directly to the ground
terminal of the load.
Directed Energy, Inc.
An IXYS Company
2401 Research Blvd. Ste. 108, Ft. Collins, CO 80526
Tel: 970-493-1901; Fax: 970-493-1903
e-mail: [email protected]
www.directedenergy.com
Doc #9200-0244 R1
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