Page 1
ISO 9001 CERTIFIED BY DSCC
75 VOLT 8 AMP MOSFET
H-BRIDGE PWM MOTOR
4220
M.S.KENNEDY CORP.
4707 Dey Road Liverpool, N.Y. 13088 (315) 701-6751
FEATURES:
Low Cost Complete H-Bridge
8 Amp Capability, 75 Volt Maximum Rating
Self-contained Smart Lowside/Highside Drive Circuitry
Internal PWM Generation, Shoot-through Protection
Isolated Case Allows Direct Heatsinking
Four Quadrant Operation, Torque Control Capability
Logic Level Disable Input
Logic Level High Side Enable Input for Special Modulation or Function
DESCRIPTION:
The MSK 4220 is a complete H-Bridge circuit to be used for DC brushed motor control or Class D switchmode
amplification. All of the drive/control circuitry for the lowside and highside switches are internal to the circuit. The
PWM circuitry is internal as well, leaving the user to only provide an analog signal for the motor speed/direction, or
audio signal for switchmode audio amplification. The MSK 4220 is constructed on a space efficient ceramic coated
insulated metal substrate that can be directly connected to a heatsink.
DRIVER/AMPLIFIER
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
PIN-OUT INFORMATION
18
17
16
15
14
13
12
11
10
Output B
Output B
Rsense B
Rsense B
V+
V+
Rsense A
Rsense A
Output A
HEN
1
Disable
2
N/C
3
Input
4
Ground
5
Ground
6
N/C
7
Vcc
8
Output A
9
1
Rev. D 6/00
Page 2
ABSOLUTE MAXIMUM RATINGS
High Voltage Supply
V+
Logic Supply
VCC
Continuous Output Current
IOUT
Peak Output Current
IPK
Output Voltage Range
VOUT
Thermal Resistance
θJC
○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○○○○○○○○
○○○○○○○○○○○○
○○○○○○○○○○○○○○○
○○
GND-2V min. To V+ max.
○○○○○○○○○○○○○
(Output Switches)
ELECTRICAL SPECIFICATIONS
75V
16V
8A
14A
5.3°C/W
Storage Temperature Range
TST
Lead Temperature Range
TLD
-65°C to +150°C
○○
○○○○○○○○○○
(10 Seconds)
Case Operating Temperature
TC
MSK4220
Junction Temperature
TJ
○○○○○○○○○○○○
○○○○○○○○○○○
-25°C to +125°C
+150°C
All Ratings: Tc= +25°C Unless Otherwise Specified
300°C
Parameter
OUTPUT CHARACTERISTICS
VDS(ON) Voltage
1
Instantaneous Forward Voltage
Reverse Recovery Time
Leakage Current
1
1
PWM Frequency
Vcc SUPPLY CHARACTERISTICS
Quiescent Bias Current
Vcc Voltage Range
1
INPUT SIGNAL CHARACTERISTICS
Analog Input Voltage
Analog Input Voltage
Analog Input Voltage
LOGIC CONTROL INPUTS
1
Disable Input
HEN Input
SWITCHING CHARACTERISTICS
Rise-Time
Fall-Time
Dead-Time
-
-
-
-
-
9
-
-
-
-
-
-
-
-
-
-
MSK 4220
Typ.
1.7
2.0
-
1.0
45
20
12
6
4
8
-
-
-
-
-
-
72
340
100
Max.
2.5
2.5
280
25
50
25
16
-
-
-
0.8
-
-135
0.8
-
-270
108
500
-
Units
V
V
nS
uA
KHz
mA
V
V
V
V
V
V
uA
V
V
uA
nS
nS
nS
Test Conditions
Each MOSFET ID=10A
1
Each MOSFET IS=10A Intrinsic Diode
2
3
3
Min.
Intrinsic Diode
Each MOSFET V+=70V
40
Analog Input=6VDC
1
Output A,B=50% Duty Cycle
Output A=100% Duty Cycle High
Output B=100% Duty Cycle High
Input Voltage LO
Input Voltage HI
2.7
Input Current (DISABLE=0V)
Input Voltage LO
Input Voltage HI
2.7
Input Current (HEN=0V)
1
RL=100Ω
NOTES:
1
Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
2
Vcc=+12V unless otherwise specified.
3
Measure using a 300µS pulse with a 2% Duty Cycle.
2
Rev. D 6/00
Page 3
APPLICATION NOTES
MSK 4220 PIN DESCRIPTIONS TYPICAL SYSTEM OPERATION
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
of the module as possible.
OUTPUT A - Is the output pin for one half of the bridge.
Decreasing the input voltage causes increasing duty
cycles at this output.
OUTPUT B - Is the output pin for the other half of the
bridge. Increasing the input voltage causes increasing
duty cycles at this output.
RSENSE A - Is the connection for the bottom of the A
half bridge. This can have a sense resistor connection
to the V+ return ground for current limit sensing, or
can be connected directly to ground. The maximum
voltage on this pin is ±2 volts with respect to GND.
RSENSE B - Is the connection for the bottom of the B
half bridge. This can have a sense resistor connection
to the V+ return ground for current limit sensing, or
can be connected directly to ground. The maximum
voltage on this pin is ±2 volts with respect to GND.
GND - Is the return connection for the input logic and
Vcc.
INPUT - Is an analog input for controlling the PWM
pulse width of the bridge. A voltage lower than Vcc/2
will produce greater than 50% duty cycle pulses out of
OUTPUT A. A voltage higher than Vcc/2 will produce
greater than 50% duty cycle pulses out of OUTPUT B.
DISABLE - Is the connection for disabling all 4 output
switches. DISABLE high overrides all other inputs.
When taken low, everything functions normally. An
internal pullup to Vcc will keep DISABLE high if left
unconnected.
HEN - Is the connection for enabling the high side out-
put switches. When taken low, HEN overrides other
inputs and the high side switches remain off. When
HEN is high everything functions normally. An internal
pullup to Vcc will keep HEN high if left unconnected.
This is a diagram of a typical application of the MSK 4220.
The design Vcc voltage is +12 volts and should have a good
low ESR bypass capacitor such as a tantalum electrolytic.
The analog input can be an analog speed control voltage from
a potentiometer, other analog circuitry or by microprocessor
and a D/A converter. This analog input gets pulled by the
current control circuitry in the proper direction to reduce the
current flow in the bridge if it gets too high. The gain of the
current control amplifier will have to be set to obtain the
proper amount of current limiting required by the system.
Current sensing is done in this case by a 0.1 ohm sense
resistor to sense current from both legs of the bridge sepa-
rately. It is important to make the high current traces as big
as possible to keep inductance down. The storage capacitor
connected to the V+ and the module should be large enough
to provide the high energy pulse without the voltage sagging
too far. A low ESR ceramic capacitor or large polypropylene
capacitor will be required. Mount the capacitor as close to
the module 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 induc-
tance in the power loop. It is important to design the snub-
ber network to suppress any positive spikes above 75V and
negative spikes below -2V with respect to ground.
3
IN
Rev. D 6/00
Page 4
TYPICAL PERFORMANCE CURVES
4
Rev. D 6/00
Page 5
MECHANICAL SPECIFICATIONS
ESD Triangle Indicates Pin 1.
TORQUE SPECIFICATION: 3 TO 5 IN/LBS.
NOTE: ALL DIMENSIONS ARE ±0.010 UNLESS OTHERWISE LABELED.
ORDERING INFORMATION
Part
Number
MSK4220
M.S. Kennedy Corp.
4707 Dey Road, Liverpool, New York 13088
Phone (315) 701-6751
FAX (315) 701-6752
www.mskennedy.com
Screening Level
Industrial
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.
Rev. D 6/005
Loading...