4707 Dey Road Liverpool, N.Y. 13088
M.S.KENNEDY CORP.
(315) 701-6751
4357
FEATURES:
500V, 28 Amp Capability at 125C
Ultra Low Thermal Resistance
Integral Free Wheeling Fast Recovery Epitaxial Diode (FRED)
Self-Contained, Smart Lowside/Highside Drive Circuitry
Under-Voltage Lockout, Internal 2uS Deadtime
Capable of Switching Frequencies to 25KHz
Isolated Case Allows Direct Heat Sinking
Case Bolt-down Design Allows Superior Heat Dissipation
MIL-PRF-38534 CERTIFIED
28 AMP, 500 VOLT IGBT PLUS DIODE
SMART POWER 3-PHASE MOTOR
DRIVE POWER HYBRID
EQUIVALENT SCHEMATIC
DESCRIPTION:
The MSK 4357 is a 28 Amp, 3 Phase Bridge Smart Power Motor Drive Hybrid with a 500 volt rating. The output
switches are Insulated Gate Bipolar Transistors (IGBT's) tailored for high switching speeds. The free-wheeling diodes
are the new Fast Recovery Epitaxial Diodes (FRED's) to provide matched current capabilities with the IGBT's and are
specified with excellent reverse recovery times at high current ratings. This new smart power motor drive hybrid is
compatible with 5v CMOS or TTL logic levels. The internal circuitry prevents simultaneous turn-on of the in-line half
bridge transistors with a built-in 2uS deadtime to prevent shoot-through. Undervoltage lockout shuts down the bridge
when the supply voltage gets to a point of incomplete turn-on of the output switches. The internal high-side power
supply derived from the +15 volt supply completely eliminates the need for 3 floating independent power supplies for
the high-side drive.
AV+
A
AV-
BV+
B
BV-
CV+
C
CV-/ISENSE
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
VCC
AHIN
ALIN
BHIN
BLIN
CHIN
CLIN
ITRIP
VSS
TYPICAL APPLICATIONS
ISO-9001 CERTIFIED BY DSCC
3 PHASE SIX STEP DC BRUSHLESS MOTOR DRIVE
OR 3 PHASE SINUSOIDAL INDUCTION MOTOR DRIVE
PIN-OUT INFORMATION
Rev. F 5/02
1
Storage Temperature Range
Lead Temperature Range(
10 Seconds
)
Case Operating Temperature
MSK4357
MSK4357H/E
Junction Temperature
-65C to +150C
300C
-40C to +85C
-55C to +125C
+175C
OUTPUT CHARACTERISTICS
VC-E On Voltage (Each IGBT)
Instantaneous Forward Voltage
(FRED Flyback Diode)
Reverse Recovery Time 1
Leakage Current
BIAS SUPPLY CHARACTERISTICS
Quiescent Bias Current
INPUT SIGNALS CHARACTERISTICS
Positive Trigger Threshold Voltage
Negative Trigger Threshold Voltage
SWITCHING CHARACTERISTICS 1
Upper Drive:
Turn-On Propagation Delay
Turn-Off Propagation Delay
Turn-On
Turn-Off
Lower Drive:
Turn-On Propagation Delay
Turn-Off Propagation Delay
Turn-On
Turn-Off
Dead Time
Minimum Pulse Width
NOTES:
Subgroup 1,4
2,5
3,6
T
A
=T
C
=+25C
T
A
=T
C
=+125C
T
A
=T
C
=-55C
Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
Industrial grade and "E" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified.
Military grade devices ("H" suffix) shall be 100% tested to subgroups 1,2,3, and 4.
Subgroups 5 and 6 testing available upon request.
All Ratings: Tc = +25C Unless Otherwise Specified
High Voltage Supply
Logic Supply
Continuous Output Current
Peak Output Current
Thermal Resistance
(Output Switches) (Junction to Case)
V
+
V
CC
I
OUT
I
PK
JC
T
ST
T
LD
T
C
T
J
Parameters
Min.
-
-
-
-
-
-
-
-
-
-
-
-
-
2.2
-
-
-
-
-
-
-
-
-
-
300
Min.
-
-
-
-
-
-
-
-
-
-
-
-
-
2.2
-
-
-
-
-
-
-
-
-
-
300
Typ.
1.8
-
-
1.4
-
-
-
34
-
-
140
-
-
-
-
659
758
38
60
656
660
35
34
2
-
Max.
2.2
-
-
1.8
-
-
180
400
-
-
180
-
-
-
0.8
1000
1000
50
100
1000
1000
50
50
-
-
MSK 4357 2
Max.
2.0
1.9
2.3
1.7
1.3
2.5
180
400
1.8
400
180
150
220
-
0.8
1000
1000
50
100
1000
1000
50
50
-
-
UNITS
V
V
V
V
V
V
nS
uA
mA
uA
mA
mA
mA
V
V
nS
nS
nS
nS
nS
nS
nS
nS
uS
uS
ELECTRICAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATING
1
2
3
1
2
3
-
1
2
3
1
2
3
1,2,3
1,2,3
4
4
4
4
4
4
4
4
-
-
Group A
Subgroup
5
500V
16V
28A
60A
0.48C/W
MSK 4357H/E 3
1
2
3
4
5
I
C
=28A
I
D
=28A
I
D
=28A,
di
/
dt
=100A/uS,V
r
=350V
V
+
=500V
V
+
=400V
V
+
=500V
V
CC
=15V
V
CC
=15V
V
CC
=15V
Test Conditions
V
+
=270V,V
CC
=15V,I
C
=28A
V
+
=270V,V
CC
=15V,I
C
=28A
Rev. F 5/02
2
1
Typ.
1.8
1.7
2.1
1.4
1.1
1.5
-
34
1.1
19
140
105
180
-
-
659
758
38
60
656
660
35
34
2
-
VCC - is the low voltage supply for all the internal logic and
drivers. A 0.1uF ceramic capacitor in parallel with a 10uF
tantalum capacitor is recommended bypassing for the VCC-
VSS pins.
VSS - is the low voltage supply return pin and the input logic
return reference. All logic input and logic output is referenced
to this pin. This pin can vary 5V from the AV-,BV-,CV-/
ISENSE power return pin without affecting any of the logic
functions.
AHIN, BHIN, CHIN - are low active logic inputs for signal-
ling the corresponding phase high-side switch to turn on. The
input levels are 5V CMOS or TTL compatible. Typical propa-
gation delays are around 600nS.
ALIN, BLIN, CLIN - are low active inputs for signalling
the corresponding phase low-side switch to turn on. The in-
put levels are 5V CMOS or TTL compatible. Typical propaga-
tion delays are around 600nS.
ITRIP - is an analog input pin for sensing current flowing from
the AV-,BV-,CV-/ISENSE pin through a sense resistor to the
high power ground. A 0.485 volt level at this pin with re-
spect to VSS will signal an overcurrent condition and shut
down all output switching. Bringing the voltage below this
point (100 mV hysteresis) will remove the shutdown condi-
tion, and leaving the low-side logic inputs simultaneously high
(de-activated) for 10uS will restore normal operation.
AV+,BV+,CV+ - are the connections from the tops of the
three half bridges to the high voltage positive rail. Connec-
tions must be made individually from each pin to the rail, with
enough current-handling capability for the load. Proper power
supply bypassing must be connected to these three pins and
the Vss connections for proper filtering. This bypassing must
be done as close to the hybrid as possible.
AV-,BV- - are the connections from the bottoms of the A
and B half bridges to the return of the high voltage negative
rail. These pins should be tied to the CV-/ISENSE with as
short a connection as possible.
CV-/ISENSE - is the connection from the bottom of the C
half bridge to the return of the high voltage negative rail. There
should be a connection to AV- and BV- here. If there is cur-
rent sensing, then a sense resistor should go between this
point and the return of the high voltage supply. If no sensing
is desired, then this point should connect to Vss, the negative
rail of the high voltage supply and any high voltage bypass
capacitance.
A, B, C - are the pins connecting the 3 phase bridge
switch outputs.
APPLICATION NOTES
PROTECTION
MSK4357 PIN DESCRIPTION
All logic inputs use a 300nS filter. A pulse width below this
will get ignored.
VCC voltage below the cutoff level of 8.65 volts will reset all
switch outputs off and ignore subsequent logic inputs until
VCC is restored.
Undervoltage lockout of the internal drivers for the high-side
switches also occurs at 8.65 volts. This may occur if the
high-side output gets switched at greater than 25 kHZ with-
out switching the low-side. The internal power supply for the
high-side switch will sag too low for adequate switching. Ei-
ther slow down the PWM rate or PWM the low-side switches
instead.
Switching a low-side logic input while the corresponding phase
high-side logic input is activated will turn off both switches.
The opposite condition is also true. This is cross-conduction
lockout and will occur any time low and high-side inputs for a
phase are activated at the same time.
A 2uS deadtime is automatically inserted between high and
low-side output switching to allow complete turn-off of each
switch so no overlap will occur.
An overcurrent condition detected by the ITRIP pin will shut
down all output switches until the overcurrent condition is
removed and all three low-side logic inputs are held high for
10uS, then normal operation will resume.
ITRIP has a 400nS leading edge blanking time after switching
to ignore any switching current transients.
TYPICAL OPERATION
-
-
-
-
-
-
-
Rev. F 5/02
3
EXAMPLE:
FOR 20 AMP LIMIT:
R-SENSE = 0.050 OHMS
R-SENSE VOLT = 1 VOLT
R1 = 51.5 OHMS
R2 = 48.5 OHMS
FIGURE 1
GROUNDING, BYPASSING, CURRENT SENSE
TYPICAL PERFORMANCE CURVES
Rev. F 5/02
4
TYPICAL SYSTEM OPERATION
The MSK4357 is designed to be used with a +270 volt high voltage bus, +15 volt low power bus, and +5 volt logic signals.
Proper derating should be applied when designing the MSK4357 into a system. High frequency layout techniques with ground
planes on a printed circuit board is the only method that should be used for circuit construction. This will prevent pulse jitter caused
by excessive noise pickup on the current sense signal or the error amp signal.
Ground planes for the low power circuitry and high power circuitry should be kept separate. The connection between the bottom
of the current sense resistor, VSS pin and the high power ground are connected at this point. This is a critical path, and high
currents should not be flowing between the current sense and VSS. Inductance in this path should be kept to a minimum. An RC
filter (shown in 2 places) will filter out the current spikes and keep the detected noise for those circuits down to a minimum.
In the system shown, two types of current limit are implemented. The first limit is a PWM pulse by pulse limit controlled by the
motor controller. A second absolute maximum limit is set up for the MSK4357 which will completely shut off the bridge in the
event that current limit is exceeded.
The logic signals coming from the typical motor controller IC are set up for driving N channel low side and P channel high side
switches directly, and are usually 15 volt levels. Provision should be made for getting 5 volt logic signals to the MSK4357 of the
correct assertion levels. Typically, the low side signals out of the controller are high active and the high side are low active.
Inverters are shown in the system schematic for the low side controller output.
Rev. F 5/02
5
The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make
changes to its products or specifications without notice, however, and assumes no liability for the use of its products.
Please visit our website for the most recent revision of this datasheet.
MECHANICAL SPECIFICATIONS
Rev. F 5/02
6
ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED
ORDERING INFORMATION
THE ABOVE EXAMPLE IS A MILITARY GRADE HYBRID WITH LEADS BENT UP.
M.S. Kennedy Corp.
4707 Dey Road Liverpool, New York 13088
Phone (315) 701-6751
FAX (315) 701-6752
www.mskennedy.com
MSK4357 H U
LEAD CONFIGURATION
S=STRAIGHT, U=BENT UP, D=BENT DOWN
SCREENING
BLANK=INDUSTRIAL, E=EXTENDED RELIABILITY;
H=CLASS H
GENERAL PART NUMBER
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