ISO 9001 CERTIFIED BY DESC
M.S.KENNEDY CORP.
28 VOLT 5 AMP MOSFET
H-BRIDGE PWM MOTOR
DRIVER/AMPLIFIER
4201
(315) 701-6751
4707 Dey Road Liverpool, N.Y. 13088
FEATURES:
Low Cost Complete H-Bridge
28 Volt, 5 Amp Capability, 75 Volt Maximum Rating
Self-contained Smart Lowside/Highside Drive Circuitry
Internal Deadtime Generation, Shoot-through Protection
Output Disable/Shutdown Capability
Isolated Case Allows Direct Heatsinking
Four Quadrant Operation, Torque Control Capability
Available Fully Screened To MIL-H-38534
MIL-PRF-38534 CERTIFIED
DESCRIPTION:
The MSK 4201 is a complete H-Bridge hybrid to be used for DC brushed motor control or Class D switchmode
amplifier. All of the drive/control circtuitry for the lowside and highside switches are internal to the hybrid. The user
provides a TTL compatible PWM signal for simultaneous amplitude and direction control in four quadrant mode. The
internal drive circuitry will provide proper deadtime/shoot-through protection for each half-bridge. All N-channel FETs
mean the best efficiency for the size, both in terms of on-resistance and switching capability. For an idle/sleep mode,
or for fault protection, a TTL compatible disable pin is provided so as to shut down all four transistors. The MSK 4201
is packaged in a space efficient isolated 8 pin TO-3 that can be directly connected to a heatsink.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
1
2
3
4
1
PIN-OUT INFORMATION
V+
MOTOR B
VCC
DISABLE
5
6
7
8
GND
INPUT
MOTOR A
RSENSE
Rev. B 6/00
ABSOLUTE MAXIMUM RATINGS
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T
C
T
J
-25°C to +85°C
-55°C to +125°C
+175°C
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ELECTRICAL SPECIFICATIONS
Parameter
OUTPUT CHARACTERISTICS
VDS(ON) Voltage (Each MOSFET)
I
D
=2A
Test Conditions
All Ratings: Tc= +25°C Unless Otherwise Specified
Subgroup
Group A
5
MSK 4201B
3
Min.
-
-
-
-
-
-
-
-
-
-
-
-
-
0.8
-
-
-
-
-
Typ.
0.55
0.90
0.36
0.95
0.85
1.0
-
1.0
2.0
0.5
11
11
11
1.5
160
85
36
170
100
Max.
0.8
1.2
0.60
1.1
0.95
1.25
240
5
10
5
15
15
15
2.7
TBD
TBD
TBD
TBD
-
Min.
-
-
-
-
-
-
-
-
-
-
-
-
-
0.8
-
-
-
-
-
MSK 4201
2
Typ.
0.55
-
-
0.95
-
-
-
1.0
-
-
11
-
-
1.5
160
85
36
170
100
Max.
1.0
-
-
1.2
-
-
240
10
-
-
15
-
-
2.7
-
-
-
-
-
1
2
3
Instantaneous Forward Voltage, Each MOSFET I
S
=2A
1
(Intrinsic Diode)
Reverse Recovery Time (Intrinsic Diode)
1
Leakage Current, Each MOSFET
V+=75V
V+=70V
V+=75V
LOGIC SUPPLY CHARACTERISTICS
Quiescent Logic Current
V
CC
=12V
(non-switching)
INPUT SIGNALS CHARACTERISTICS
Threshold Voltage
SWITCHING CHARACTERISTICS
1
Turn-Off Propagation Delay
Rise-Time
Fall-Time
Dead-Time
V
CC
=12V
V+=28V, V
CC
=12V, I
C
=2A
1
2
3
-
1
2
3
1
2
3
1,2,3
4
4
4
4
-
4
Turn-On Propagation Delay (Includes Deadtime)
30
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 devices shall be tested to subgroups 1 and 4 unless otherwise specified.
Military grade devices ("B" suffix) shall be 100% tested to subgroups 1,2,3 and 4.
Subgroups 5 and 6 testing available upon request.
Subgroup 1,4
T
A
=T
C
= +25°C
2
T
A
=T
C
= +125°C
3
T
A
=T
C
= -55°C
2
Rev. B 6/00
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V+
V
CC
I
OUT
I
PK
V
OUT
θ
JC
High Voltage Supply
75V
Logic Supply
16V
Continuous Output Current
5A
Peak Output Current
37A
Output Voltage Range GND-2V min. To V+ max.
Thermal Resistance
2.6°C/W
(Output Switches)
T
ST
T
LD
Storage Temperature Range
Lead Temperature Range
(10 Seconds)
Case Operating Temperature
MSK4201
MSK4201B
Junction Temperature
-65°C to +150°C
300°C
Units
V
V
V
V
V
V
nS
uA
uA
uA
mA
mA
mA
V
nS
nS
nS
nS
nS
APPLICATION NOTES
MSK 4201 PIN DESCRIPTION
VCC
- Is the low voltage supply for powering internal
logic and drivers for the lowside and highside MOSFETS.
The supplies for the highside drivers are derived from
this voltage.
V+
- Is the higher voltage H-bridge supply. The
MOSFETS obtain the drive current from this supply pin.
The voltage on this pin is limited by the drive IC. The
MOSFETS are rated at 100 volts. Proper by-passing to
GND
with sufficient capacitance to suppress any volt-
age transients, and to ensure removing any drooping
during switching, should be done as close to the pins
on the hybrid as possible.
MOTOR A
- Is the output pin for one half of the bridge.
When the PWM input is high, this output will be pulled
up to V+.
MOTOR B
- Is the output pin for the other half of the
bridge. When the PWM input is low, this output will be
pulled up to V+.
RSENSE
- This is the common connection for the bot-
tom of the bridge. This can have a sense resistor con-
nection to the V+ return ground for current limit sens-
ing, or can be connected directly to ground. The maxi-
mum voltage on this pin is ±2 volts with respect to
GND.
GND
- Is the return connection for the input logic and
Vcc.
PWM INPUT
- Is a TTL compatible input pin for provid-
ing the PWM signal to modulate the output switches.
The duty cycle can be between 0% (DC Low) and 100%
(DC High). See typical system operation notes.
IN
DISABLE INPUT
- Is a TTL compatible input for provid-
ing a shutdown signal to the hybrid for disabling all
four switches in the bridge regardless of the PWM in-
put level. A digital 1 disables, a digital 0 enables.
3
Rev. B 6/00
TYPICAL SYSTEM OPERATION
This is a diagram of a typical application of the MSK 4201. The design Vcc voltage is +12 volts and should have a good low
ESR bypass capacitor such as a tantalum. The PWM and DISABLE signals are typically provided by some type of microprocessor
control. The PWM signal will be a TTL signal with a pulse frequency required by the system, and pulse duty cycles according to the
required direction/speed. A 0% duty cycle (continuous TTL low) will mean full voltage to the motor in one direction. A 100% duty
cycle (continuous TTL high) will mean full voltage to the motor in the other direction. A 50% duty cycle will hold the motor at 0
RPM.
Current sensing is done in this case by a 0.1 ohm sense resistor to sense current from either leg of the bridge. It is important
to make the high current traces as wide as possible to keep inductance down. The storage capacitor connected to the V+ and the
hybrid should be large enough to provide the high energy pulse without the voltage sagging too far. The storage capacitor should
be a low ESR ceramic capacitor or large polypropylene capacitor. Mount capacitor as close to the hybrid as possible. The
connection between GND and the V+ return should not be carrying any motor current. The sense resistor signal is common mode
filtered as necessary to feed the limiting circuitry for the microprocessor. This application will allow full four quadrant torque control
for a closed loop servo system.
A snubber network is usually required, due to the inductance in the power loop. It is important to design the snubber network
to suppress any positive spikes above 75V and negative spikes below -2V with respect to pin 5 (gnd) of the hybrid.
4
Rev. B 6/00
MECHANICAL SPECIFICATIONS
ALL DIMENSIONS ARE ±.01 INCHES UNLESS OTHERWISE LABELED
ORDERING INFORMATION
Part
Number
MSK4201
MSK4201B
Screening Level
Industrial
Military-Mil-H-38534
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.
M.S. Kennedy Corp.
5
Rev. B 6/00
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