MIL-PRF-38534 & 38535 CERTIFIED FACILITY
M.S.KENNEDY
CORP.
M.S.
KENNEDY
CORP.
20 AMP, 100 VOLT MOSFET
SMART HIGH TEMP 3-PHASE
MOTOR DRIVE HYBRID
4707 Dey Road Liverpool, N.Y. 13088
4323
(315) 701-6751
FEATURES:
Designed for High Temp Applications
100V, 20 Amp Capability
Low Thermal Resistance - Junction to Case - 3.0°C/W (Each MOSFET)
Self-Contained, Smart Lowside/Highside Drive Circuitry
Under-Voltage Lockout, Internal 2μS Deadtime
Capable of Switching Frequencies to 25KHz
Isolated Case Allows Direct Heat Sinking
Case Bolt-down Design Allows Superior Heat Dissipation
Contact MSK for MIL-PRF-38534 Qualification Status
DESCRIPTION:
The MSK 4323 is a 20 Amp, High Temp Smart 3 Phase Bridge with a 100 volt rating on the output switches. The
output switches are power MOSFETs with intrinsic fast-recovery diodes for the free-wheeling currents of motor
drives. This high temp smart power motor drive module 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 2μS 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 boot strap power supply derived from the +15 volt supply
completely eliminates the need for 3 floating independent power supplies for the high-side drive. The circuit has been
tested to temperatures above 175°C and uses special high temperature construction processes.
EQUIVALENT SCHEMATIC
PIN-OUT INFORMATION
TYPICAL APPLICATIONS
1
2
3
4
5
6
7
8
9
10
3 PHASE SIX STEP DC BRUSHLESS MOTOR DRIVE
OR 3 PHASE SINUSOIDAL INDUCTION MOTOR DRIVE
1
VCC
AØHIN
BØHIN
CØHIN
AØLIN
FAULT
CØLIN
BØLIN
VSS
ITRIP
20
19
18
17
16
15
14
13
12
11
VBAØ
AØ
V+
VBBØ
N/C
BØ
VBCØ
N/C
CØ
ISENSE
8548-66 Rev. E 7/13
ABSOLUTE MAXIMUM RATINGS 6
V+
VCC
IOUT
θJC
High Voltage Supply 10
Logic Supply
Output Current
Thermal Resistance
(Output Switches)
(Junction to Case @ 125°C)
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
100V
18V
20A
○
○
○
TsT Storage Temperature Range 7
TLD Lead Temperature Range
(10 Seconds)
TC Case Operating Temperature 7
MSK 4323
MSK 4323H
TJ Junction Temperature 7
○
○
○
○
○
○
○
○
3.0°C/W
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
-65° to +200°C
○
○
○
○
○
300°C
○
-40°C to +175°C
-55°C to +175°C
200°C
○
○
○
○
○
○
○
ELECTRICAL SPECIFICATIONS
GROUP A
MSK 4323H 3
SUBGROUP
Min.
Typ. Max.
5
Test Conditions 8
Parameters
MSK 4323 2 UNITS
Min. Typ. Max.
OUTPUT CHARACTERISTICS
VDS(ON) (Each Transistor)
ID = 20A
Instantaneous Forward Voltage
(Intrinsic Diode)
IS = 20A
Reverse Recovery Time
1
Leakage Current 9
V+ = 100V
V+ = 80V
V+ = 100V
1
2
3
1
2
3
1
2
3
-
1.4
2.3
0.7
1.3
0.9
1.5
3
500
-
1.75
4.0
1.75
1.75
1.75
1.75
330
250
1000
250
-
1.4
1.3
3
-
1.75
1.75
330
250
-
V
V
V
V
V
V
nS
μA
μA
μA
1
2
3
-
3
4.5
3
6
10
10
-
3
-
6
-
mA
mA
mA
0.8
600
V
V
mV
0.98
2.4
330
440
-
μS
μS
nS
nS
0.9
2.0
140
215
2
300
-
μS
μS
nS
nS
μS
nS
BIAS SUPPLY CHARACTERISTICS
Quiescent Bias Current
VCC = 15V
(non-switching)
INPUT SIGNAL CHARACTERISTICS
Positive Trigger Threshold Voltage
VCC = 15V
Negative Trigger Threshold Voltage
VCC = 15V
I. Trip Threshold Voltage
VCC = 15V
SWITCHING CHARACTERISTICS 1
Upper Drive:
V+ = 50V, VCC = 15V, ID = 20A
Turn-On Propagation Delay
Turn-Off Propagation Delay
Turn-On
Turn-Off
Lower Drive:
V+ = 50V, VCC = 15V, ID = 20A
Turn-On Propagation Delay
Turn-Off Propagation Delay
Turn-On
Turn-Off
Dead Time
1
Minimum Pulse Width
1
1
-
2.2
360 500
0.8
600
0.98
2.4
330
440
-
0.9
2.0
140
215
2
300
-
-
-
2.2
360 500
-
NOTES:
1
2
3
4
5
6
7
8
9
10
Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
Industrial grade 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 = +25°C
2, 5 TA = TC = +175°C
3, 6 TA = TC = -55°C
Continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle.
The MSK 4323 is capable of operating at junction temperatures up to 200°C but reliability data is not yet established beyond 175°C.
External bootstrap capacitors are 22μF.
Leakage current for low side switches is tested with high side turned on.
When applying power to the device, apply the low voltage followed by the high voltage or alternatively, apply both at the same time.
Do not apply high voltage without low voltage present.
2
8548-66 Rev. E 7/13
TYPICAL PERFORMANCE CURVES
3
8548-66 Rev. E 7/13
APPLICATION NOTES
PROTECTION
MSK 4323 PIN DESCRIPTION
- All logic inputs use a 300nS filter. A pulse width
below this will get ignored.
VCC - Is the low voltage supply for all the internal logic
and drivers. A 0.1 μF ceramic capacitor in parallel with
a 10μF tantalum capacitor is recommended bypassing
for the VCC-VSS pins.
- 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.
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 ISENSE power return pin without affecting any of
the logic functions.
- Undervoltage lockout of the internal drivers for the
high-side switches also occurs at 8.65 volts, but will
not flag with the FAULT output. This may occur if
the high-side output gets switched without switch
ing the low-side. The internal boot strap power
supply for the high-side switch will sag too low for
adequate switching. The boot strap supply depends
on PWMing of the low-side switches for proper
operation.
AØHIN, BØHIN, CØHIN - Are low active logic inputs for
signalling the corresponding phase high-side switch to
turn on. The input levels are 5V CMOS or TTL compatible.
- 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.
AØLIN, BØLIN, CØLIN - Are low active inputs for signalling the corresponding phase low-side switch to turn
on. The input levels are 5V CMOS or TTL compatible.
FAULT - Is an open drain logic output pin that gets
enabled any time the VCC level goes below the cutoff
point, or an overcurrent condition occurs. Bringing VCC
back to normal levels will reset FAULT. Removing the
overcurrent condition and allowing the low-side logic
inputs to remain high(off) for 10μS will restore operation.
- A 2μS 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 10μS,
then normal operation will resume.
ITRIP - Is an analog input pin for sensing current flowing from the ISENSE pin through a sense resistor to the
high power ground. A 0.5 volt level at this pin with
respect to VSS will signal an overcurrent condition,
enable the FAULT pin and shut down all output switching. Bringing the voltage below this point (100 mV
hysteresis) will remove the FAULT output and leaving
the low-side logic inputs simultaneously high (de-activated) for 10μS will restore normal operation.
- ITRIP has a 100nS leading edge blanking time
after switching to ignore any switching current
transients.
TYPICAL OPERATION
V+ - Is the high voltage positive rail for the bridge.
Proper bypassing to VSS with sufficient capacitance
to suppress any voltage transients and to ensure removing any drooping during switching, should be done
as close to the pins on the hybrid as possible.
ISENSE - Is the return side of the bridge. A sense
resistor can be connected between this point and VSS,
which is the high voltage negative rail. ISENSE can
float above and below the VSS pin up to 5 volts and
proper operation will be maintained. Precautions should
be taken so as to not allow this voltage to get over ±5
volts under any conditions.
AØ, BØ, CØ - Are the pins connecting the 3 phase
bridge switch outputs.
VBAØ, VBBØ, VBCØ - Are connections to each bootstrap supply. Connect a 22μF capacitor from these pins
to the corresponding bridge output.
4
8548-66 Rev. E 7/13
TYPICAL SYSTEM OPERATION
FIGURE 2
The MSK 4323 is designed to be used with a high voltage bus, +15 volt low power bus and +5 volt logic signals.
Proper derating should be applied when designing the MSK 4323 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 MSK 4323 which will completely shut off the bridge in the event that current limit is exceeded.
When controlling the motor speed by the PWM method, it is required that the low side switches be PWM pulsed
due to the bootstrap power supplies used to power the high side switch drives. The higher the PWM speed the higher
the current load on the drive supply. PWM of the low side will prevent sagging of the high side bootstrap supplies.
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 MSK 4323 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.
5
8548-66 Rev. E 7/13
MECHANICAL SPECIFICATIONS
WEIGHT=42.2 GRAMS TYPICAL
All dimensions are ±0.01 inches unless otherwise specified.
ESD Triangle Indicates Pin 1
MSK4323 H U
ORDERING INFORMATION
LEAD CONFIGURATIONS
S = STRAIGHT; U = BENT UP; D = BENT DOWN
SCREENING
BLANK = INDUSTRIAL; H = MIL-PRF-38534 CLASS H
GENERAL PART NUMBER
M.S. Kennedy Corp.
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.
Contact MSK for MIL-PRF-38534 qualification status.
6
8548-66 Rev. E 7/13