MSK MSK4226S

ISO 9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
75 VOLT 20 AMP MOSFET
H-BRIDGE WITH
GATE DRIVE
4226
4707 Dey Road Liverpool, N.Y. 13088
(315) 701-6751
FEATURES:
• Low RDS(ON) 0.013Ω Typical
• Low Cost Complete H-Bridge
•20 Amp Capability, 75 Volt Maximum Rating
• Self-contained Smart Lowside/Highside Drive Circuitry
• Shoot-through Protection
• Isolated Case Allows Direct Heatsinking
• Logic Level Disable Input
• Individual Logic Level Gate Drive Inputs for Various Modulation Schemes
DESCRIPTION:
The MSK 4226 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. Logic level inputs
are provided for controlling each MOSFET independently, allowing every possible switch combination except those that
would cause a simultaneous conduction or shoot-through condition for each half bridge. This gives the user freedom to use
various modulation schemes for PWM control. The MSK 4226 is constructed in a space efficient plastic power package
that can be directly bolted to a heatsink.
EQUIVALENT SCHEMATIC
PIN-OUT INFORMATION
TYPICAL APPLICATIONS
1
2
3
4
5
6
7
8
9
10
1
NC
VCC
BHI
DIS
BLI
AHI
ALI
GND
GND
NC
20
19
18
17
16
15
14
13
12
11
RSENSE A
RSENSE A
OUTPUT A
OUTPUT A
V+
V+
OUTPUT B
OUTPUT B
RSENSE B
RSENSE B
Rev. B 11/04
ABSOLUTE MAXIMUM RATINGS
V+
VCC
IOUT
IPK
VOUT
θJC
High Voltage Supply
75V
Logic Supply
16V
Continuous Output Current
20A
Peak Output Current
40A
Output Voltage Range
GND -2V min. to V + max.
Thermal Resistance
3.0°C/W
(Output Switches @ 125°C)
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TST Storage Temperature Range
TLD Lead Temperature Range
(10 Seconds)
TC Case Operating Temperature
MSK4226
TJ Junction Temperature
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-55°C to +125°C
300°C
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-40°C to +85°C
+150°C
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ELECTRICAL SPECIFICATIONS
Tc= +25°C Unless Otherwise Specified
MSK 4226
Parameter
Test Conditions
2
Units
Min.
Typ.
Max.
-
-
0.013
Ω
-
0.45
0.52
V
-
1.0
1.3
V
Intrinsic Diode
-
-
280
nS
Each MOSFET V+=70V
-
1.0
25
uA
Quiescent Bias Current
-
29
50
mA
Vcc Voltage Range 1
9
12
16
V
Input Voltage LO
-
-
0.8
V
Input Voltage HI
2.7
-
-
V
-
-
135
uA
OUTPUT CHARACTERISTICS
RDS (ON) 1 4
Each MOSFET ID=20A
VDS(ON) Voltage
Each MOSFET ID=20A
Instantaneous Forward Voltage
Each MOSFET IS=20A Intrinsic Diode
Reverse Recovery Time 1
Leakage Current
Vcc
3
3
SUPPLY CHARACTERISTICS
LOGIC CONTROL INPUTS,ALI,BLI,AHI,BHI and DIS 1
Input Current (VIN=0V)
SWITCHING CHARACTERISTICS
1
RL=100Ω
Rise Time
-
50
-
nS
Fall Time
-
170
-
nS
Dead Time
-
100
-
nS
NOTES:
1
2
3
4
Guaranteed by design but not tested. Typical parameters are representative of actual device performance but are for reference only.
Vcc=+12V, V+=28V, RSENSE A,B=Ground, DIS=0V unless otherwise specified.
Measured using a 300µS pulse with a 2% Duty Cycle.
On Resistance is specified for the Internal MOSFET for Thermal Calculations. It does not include the package pin resistance.
2
Rev. B 11/04
APPLICATION NOTES
MSK 4226 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
75 volts. Proper by-passing to GND with sufficient capacitance to suppress any voltage 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.
This is a diagram of a typical application of the MSK4226.
The design Vcc voltage is +12 volts and should have a good
low ESR bypass capacitor such as a tantalum electrolytic. The
digital inputs can come from a microprocessor or any type of
PWM controller. The controller will use the current sense
signal to either control current through PWM, current limit the
bridge, or both.
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.
Current sensing is done in this case by a 0.01 ohm sense
resistor to sense current from both legs of the bridge separately. 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. Any modulation scheme may be used,
however, but the current sensing scheme may have to change.
IN
GND - Is the return connection for the input logic and Vcc.
DIS - 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.
ALI - Is the logic level digital input for controlling the lowside
MOSFET in the A half bridge. If AHI is driven high or not
connected externally then ALI controls both the lowside and
highside MOSFETs, with dead time in between. This is due to
the simultaneous conduction lockout feature. DIS will override the ALI input.
AHI - Is the logic level digital input for controlling the highside
MOSFET in the A half bridge. ALI high level input will override this input to prevent simultaneous conduction. DIS will
override the AHI input.
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 70V and negative spikes below -2V with respect to ground.
BLI - Is the logic level digital input for controlling the lowside
MOSFET in the B half bridge. If BHI is driven high or not
connected externally then BLI controls both the lowside and
highside MOSFETs, with dead time in between. This is due to
the simultaneous conduction lockout feature. DIS will override the BLI input.
*There are certain inductive load situations that can possibly
cause a momentary shoot-through or cross-conduction condition in the MSK4226. This shoot-through is approximately
100nSec long and can be several amps, depending on the
layout and impedence of the bypassing circuit. Most bypassing and current sensing filtering will usually eliminate the effects. However, in the case where it is still present, or the
sense resistor trace lengths are long, reverse-biased ultra-fast
recovery diodes or power schottky diodes from RSENSE A
and RSENSE B to power ground will minimize or eliminate the
situation.
BHI - Is the logic level digital input for controlling the highside
MOSFET in the B half bridge. BLI high level input will override
this input to prevent simultaneous conduction. DIS will override the BHI input.
3
Rev. B 11/04
MSK4226 EVALUATION SCHEMATIC
4
Rev. B 11/04
MECHANICAL SPECIFICATIONS
ESD Triangle Indicates Pin 1.
NOTE: ALL DIMENSIONS ARE ±0.010 UNLESS OTHERWISE LABELED.
ORDERING INFORMATION
Part
Number
Screening
Level
MSK4226S
Industrial
Straight
MSK4226D
Industrial
Down
MSK4226U
Industrial
Up
MSK4226G
Industrial
Gull Wing
Lead
Configuration
M.S. Kennedy Corp.
4704 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.
5
Rev. B 11/04