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ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP. FEATURES:
50 AMP, 500 VOLT IGBT PLUS DIODE FULLY ISOLATED SMART POWER 3-PHASE MOTOR DRIVE POWER HYBRID
4351
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088 500V, 50 Amp Capability at 110C Fully Isolated Bridge Ultra Low Thermal Resistance Integral Free Wheeling Fast Recovery Epitaxial Diode (FRED) Self-Contained, Smart Lowside/Highside Drive Circuitry and Isolated Supply Adjustable Deadtime Capable of Switching Frequencies to 20KHz Isolated Case Allows Direct Heat Sinking; On Board Temp Sensor Case Bolt-down Design Allows Superior Heat Dissipation
MIL-PRF-38534 CERTIFIED
DESCRIPTION:
The MSK 4351 is a 50 Amp, 3 Phase Isolated 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 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. The bridge is optically isolated from the control circuitry. 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 adjustable 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 isolated 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.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
1 2 3 4 5 6 7 8 9 10 11 12 1
PIN-OUT INFORMATION
+15V GND AHI ALO BHI BLO +15V GND CHI CLO +15V GND 13 14 15 16 17 18 19 20 21 22 23 24 RESET R/C +15V N/C OSCOUT GND N/C N/C N/C N/C N/C TEMP SENSE 25 26 27 28 29 30 31 32 33 34 35 36 RKELVIN+ RKELVINRSENSERSENSERSENSE+ RSENSE+ CVCVCO CO CV+ CV+ 37 38 39 40 41 42 43 44 45 46 47 48 BVBVBO BO BV+ BV+ AVAVAO AO AV+ AV+
3 PHASE SIX STEP DC BRUSHLESS MOTOR DRIVE OR 3 PHASE SINUSOIDAL INDUCTION MOTOR DRIVE
PRELIMINARY Rev. A 11/01
ABSOLUTE MAXIMUM RATING

ELECTRICAL SPECIFICATIONS
Parameters OUTPUT CHARACTERISTICS VC-E On Voltage (Each IGBT) IC=50A Test Conditions
All Ratings: Tc = +25C Unless Otherwise Specified
Group A Subgroup 5
MSK 4351H/E Min. Typ.
3 Max. Min. -
MSK 4351 Typ.
Max. UNITS
1 2 3
-
-
2.2 2.1 TBD 1.8 1.5 2.5 180 400 1.5 400 TBD TBD TBD
-
2.3 1.8 180 400 -
Instantaneous Forward Voltage (FRED Flyback Diode)
ID=50A
1 2 3
Reverse Recovery Time Leakage Current
1
ID=50A,di/dt=100A/uS,Vr=350V V+=500V V+=400V V+=500V
1 2 3 1 2 3
BIAS SUPPLY CHARACTERISTICS Quiescent Bias Current VCC=15V TBD mA mA mA
INPUT SIGNALS CHARACTERISTICS Positive Trigger Threshold Voltage Negative Trigger Threshold Voltage SWITCHING CHARACTERISTICS 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-OffV+=270V, IC=50A TEMPERATURE SENSOR Initial Accuracy Overall Accuracy NOTES:
1 2 3 4 5 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. Subgroup 1,4 TA=TC=+25C 2,5 TA=TC=+125C 3,6 TA=TC=-55C
1,2,3 1,2,3 1 V+=270V, IC=50A 4 4 4 4 V+=270V, IC=50A 4 4 4 4 TC=25C 1 2,3
2.2 -
-
0.8
2.2 -
-
0.8
-
-
TBD TBD 45 350
-
-
TBD TBD 45 350
-
0.5 1.3
TBD TBD 45 350 2.0 4.0
TBD TBD 45 350 3.0 5.0
0.5 1.3
1
TMIN TC TMAX
2
PRELIMINARY Rev. A

(Output Switches) (Junction to Case)
TJ

V+ VCC IOUT IPK JC
High Voltage Supply Logic Supply Continuous Output Current Peak Output Current (1 pulse, 10Sec) Thermal Resistance
500V 18V 50A 60A 0.38C/W
TST TLD TC
Storage Temperature Range -65C to +150C Lead Temperature Range(10 Seconds) 300C Case Operating Temperature MSK4351 -40C to +85C MSK4351H/E -55C to +125C Junction Temperature +150C
2
V V V V V V nS uA mA uA
-
V V
nS nS nS nS
nS nS nS nS
C C
11/01
APPLICATION NOTES MSK4351 PIN DESCRIPTION
+15V - is the low voltage supply for all the internal logic and isolated supplies which provide power to the gate drivers. A 0.1F ceramic capacitor in parallel with a 22F tantalum capacitor is recommended for bypassing the low voltage supply to GND. GND - is the low voltage supply return for the +15V. All bypassing of the +15V should return here. Since the output section of the hybrid is completely isolated, there are no restrictions for potential differences between this GND and any hivoltage returns, up to 500V. AHI,BHI,CHI - are the logic inputs for controlling the switching of the corresponding hi-side bridge outputs. A logic high will turn on the corresponding hi-side output. The input levels are 5V CMOS or TTL compatible. If one of these inputs are active at the same time as the corresponding low-side bridge outputs, neither output will be allowed to turn on until one of the inputs is switched low. There will be a deadtime inserted before the corresponding bridge output is switched in all cases. This prevents simultaneous conduction of the output, shorting high voltage supply and destroying the bridge. ALO,BLO,CLO - are the logic inputs for controlling the switching of the corresponding low-side bridge outputs. A logic high will turn on the corresponding low-side output. The input levels are 5V CMOS or TTL compatible. If one of these inputs are active at the same time as the corresponding hi-side bridge outputs, neither output will be allowed to turn on until one of the inputs is switched low. There will be a deadtime inserted before the corresponding bridge output is switched in all cases. This prevents simultaneous conduction of the output, shorting the high voltage supply and destroying the bridge. RESET - is an active low logic input for causing all switching to cease. The input level is 5V CMOS or TTL compatible. Upon releasing RESET, the outputs will resume after the dead time. R/C - is the input pin for setting the deadtime of the bridge. Connecting a resistor between this input and OSC OUT, and a capacitor to ground will create the time for an internal oscillator. OSC OUT - is a pin that brings the deadtime oscillator out to be connected through the timing resistor to R/C. This is not an output to be used externally, but just for the timing circuit. AV+,BV+,CV+ - are pins for connecting the tops of each half bridge to the high voltage supply. Each pin must be connected individually, as there is no internal connection across the three half bridges. Proper power supply bypassing must be connected to these pins and the V- pins as close to the hybrid as possible for proper filtering. AV-,BV-,CV- - are pins for connecting the bottoms of each half bridge to the high voltage supply return. Each pin must be connected individually, as there is no internal connection across the three half bridges. Proper power supply bypassing must be connected to these pins and the V+ pins as close to the hybrid as possible for proper filtering. AO, BO, CO - are the pins connecting the 3 phase bridge switch outputs. TEMP SENSE - is a pin for measuring the output of a temperature sensor IC. The case temperature is depicted as a voltage corresponding to 10mV/C with 0 volts equating to absolute zero, 0K or -273C. 3
RSENSE+ - is the pin for connecting to the internal sense resistor. It has a value of 0.003 ohms, 20 watts. AV-,BV- and CV- should connect to this point for sensing the current at the bottom of the bridge. RSENSE- - is the pin for connecting the internal sense resistor to the high voltage return. RKELVIN+ - is the pin for connecting to the sense resistor +KELVIN connection. This is on the same side of the resistor as RSENSE+. RKELVIN- - is the pin for connecting to the sense resistor -KELVIN connection. This is on the same side of the resistor as RSENSE-.
DEADTIME SELECTION
The amount of deadtime required is based on the propagation delay of the input to actual completion of switching of the output transistors. Not taking all this into account can possibly allow the opposite transistor in a half bridge to turn on before the active transistor can turn off. Excessive current will flow through the half bridge because this creates a momentary short across the power supply. Once all these factors are taken into account, the deadtime can be determined. Allow sufficient safety factor for changes in components over temperature, and variations from system to system in production. Deadtime is exactly 8 R/C clock periods. Use the formula: Max. Clock = 8/Min. Deadtime
For clock operation below 1MHz: Clock Frequency = 0.95 COSC x ROSC 0.95 COSC (ROSC + 30) + 3x 10 8
For clock operation above 1MHz: Clock Frequency =
As an alternative, the R/C pin can be driven directly with an HCMOS compatible clock up to 24MHz.
PRELIMINARY Rev. A
11/01
TYPICAL PERFORMANCE CURVES
4
PRELIMINARY Rev. A 11/01
TYPICAL SYSTEM OPERATION
The MSK4351 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 MSK4351 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 two sections of the hybrid are completely isolated, and can float relative to each other without referencing one to the other. An RC filter will filter out the current spikes and keep the detected noise for that circuit down to a minimum. 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 MSK4351 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 high side controller output.
5
PRELIMINARY Rev. A
11/01
MECHANICAL SPECIFICATIONS
ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED
ORDERING INFORMATION
MSK4351 H U
LEAD CONFIGURATION S=STRAIGHT, U=BENT UP, D=BENT DOWN SCREENING BLANK=INDUSTRIAL; E=EXTENDED RELIABILITY; H=CLASS H (MIL-PRF-38534) GENERAL PART NUMBER
THE ABOVE EXAMPLE IS A MILITARY GRADE HYBRID WITH LEADS BENT UP.
4707 Dey Road Liverpool, New York 13088 Phone (315) 701-6751 FAX (315) 701-6752 www.mskennedy.com
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.
M.S. Kennedy Corp.
6
PRELIMINARY Rev. A
11/01

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