MIL-PRF-38534 AND 38535 CERTIFIED FACILITY
10 AMP, 55V, 3 PHASE
MOSFET BRUSHLESS
MOTOR CONTROLLER
4360
FEATURES:
55 Volt Motor Supply Voltage
10 Amp Output Switch Capability
100% Duty Cycle High Side Conduction Capable
Shoot-Through/Cross Conduction Protection
Hall Sensing and Commutation Circuitry on Board
Internal ±15 Volt Regulators
"Real" Four Quadrant Torque Control Capability
Good Accuracy Around the Null Torque Point
Isolated Package for High Voltage Isolation Plus Good Thermal Transfer
Contact MSK for MIL-PRF-38534 Qualification Status
DESCRIPTION:
The MSK4360 is a complete 3 Phase MOSFET Bridge Brushless Motor Control System in an electrically isolated hermetic
package. The hybrid is capable of 10 amps of output current and 55 volts of DC bus voltage. It has the normal features for
protecting the bridge. Included is all the bridge drive circuitry, hall sensing circuitry, commutation circuitry and all the current
sensing and analog circuitry necessary for closed loop current mode (torque) control. When PWM'ing, the transistors are
modulated in locked anti-phase mode for the tightest control and the most bandwidth. Provisions for applying different compensation schemes are included. The MSK4360 has good thermal conductivity of the MOSFET's due to isolated substrate/package design that allows direct heat sinking of the hybrid without insulators.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
3 Phase Brushless DC Motor Control
Servo Control
Fin Actuator Control
Gimbal Control
AZ-EL Control
1
8548-74 Rev. N 12/14
ABSOLUTE MAXIMUM RATINGS
V +
IQ
VIN
+15V
-15V
IOUT
IPK
High Voltage Supply
V+ Quiescent Current
Current Command Input
Output Current
Output Current
Continuous Output Current
Peak Output Current
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OJC
OJC
TST
TLD
TC
TJ
55V
0.16A
±13.5V
10mA
10mA
10A
16A
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13°C/W
Thermal Resistance (Regulator)
5.5°C/W
Thermal Resistance (Output Switches)
-65°C to +150°C
Storage Temperature Range 8
+300°C
Lead Temperature Range (10 Seconds)
Case Operating Temperature
-40°C to +85°C
MSK4360
-55°C to +125°C
MSK4360H
+150°C
Junction Temperature
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ELECTRICAL SPECIFICATIONS
Parameter
Test Conditions
MSK4360H 3
MSK4360 2
Group A
Subgroup
Min.
Typ.
Max.
Min.
Typ.
Max.
4
5,6
15
13.6
16
22
17
18.4
15
-
16
-
17
-
1,2,3
1,2,3
4
14.25
-15.75
-
-
15.75
-14.25
250
14.25
-15.75
-
-
-
3.0
-
0.8
-
3.0
-
4
5,6
1
2,3
4
5,6
-
-13.5
1.9
1.8
-25
-50
0.475
0.45
-12
2
2
0
0
0.5
0.5
-
+13.5
1.5
2.1
2.2
25
50
0.525
0.55
+12
-13.5
1.8
-50
0.45
-12
2
0
0.5
-
-
-12
-
3
1.8
400
+12
-
-12
-
3
1.8
400
+12
-
VOLTS
V/µSec
MHz
V/mV
-
-
0.8
1.6
86
2
1.92
750
1.6
-
-
0.8
1.6
86
2
1.92
750
1.6
-
VOLTS
VOLTS
µA
VOLTS
nSec
µSec
-
3.0
-
-
0.8
3.1
3.0
-
-
0.8
3.1
VOLTS
VOLTS
mA
Units
PWM
Clock Frequency
REGULATORS
+15 VOUT
-15 VOUT
-15 VOUT Ripple
HALL INPUTS
VIL 1
VIH 1
ANALOG SECTION
Current Command Input Range 1
Current Command Input Current 1
Transconductance
Offset Current
Current Monitor 7
10mA Load
10mA Load
10mA Load
6
6
7
Current Command=0 Volts
@ ±1 Amp Output
Current Monitor Voltage Swing 1
5mA Load
ERROR AMP
E/A OUTPUT Swing 1
5mA Load
Slew Rate 1
Unity Gain Bandwidth 1
Large Signal Voltage Gain 1
OUTPUT SECTION
Voltage Drop Across Bridge (1 Upper & 1 Lower) 1
10 AMPS
Voltage Drop Across Bridge (1 Upper & 1 Lower) 1 10 AMPS @ 150°c Junction
Leakage Current 1
All switches off, V+=44V, 150°C Junction
Diode VSD 1
trr 1
Dead Time 1
DISABLE
VIL 1
VIN 1
Input Current 1
KHz
KHz
15.75 VOLTS
-14.25 VOLTS
mV
250
0.8
-
VOLTS
VOLTS
+ 1 3 . 5 VOLTS
mA
1.5
A/V
2.2
A/V
mA
50
mA
V/A
0.55
V/A
+ 1 2 VOLTS
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 ("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 =+125°C
3, 6 TA = TC = -55°C
6 Maximum power dissipation must be limited according to voltage regulator power dissipation.
7 Measurements do not include offset current at 0V current command.
8 Internal solder reflow temperature is 180°C, do not exceed.
2
8548-74 Rev. N 12/14
APPLICATION NOTES
MSK4360 PIN DESCRIPTIONS
V+ - is the power connection from the hybrid to the bus. The
external wiring to the pin should be sized according to the
RMS current required by the motor. The pin should be bypassed
by a high quality monolithic ceramic capacitor for high frequencies and enough bulk capacitance for keeping the V+ supply
from drooping. 78 μF of ceramic capacitance and 1700 μF of
bulk capacitance was used in the test circuit. The voltage range
on the pin is from 16 volts up to 55 volts.
CURRENT COMMAND (+,-) - are differential inputs for controlling the module in current mode. Scaled at ±2 amps per volt
of input command, the bipolar input allows both forward and
reverse current control capability regardless of motor commutation direction. The maximum operational command voltage
should be ±5 volts for ±10 amps of motor current.
CURRENT MONITOR- is a pin providing a current viewing signal for external monitoring purposes. This is scaled at ±2
amps of motor current per volt output, up to a maximum of
±5 volts, or ±10 amps. As ±10 amps is exceeded, the peaks of
the waveform may become clipped as the rails of the amplifiers are reached. This voltage is typically ±8 volts, equating to
±16 amps of current peaks. In DISABLE mode, the CURRENT
MONITOR output may rail positive or negative, depending on
internal bias currents. When re-enabled, this output will resume expected operation.
MOTOR DRIVE A,B,C - are the connections to the motor
phase windings from the bridge output. The wiring to these
pins should be sized according to the required current by the
motor. There are no short circuit provisions for these outputs.
Shorts to V+ or V+ RTN from these pins must be avoided or the
bridge will be destroyed.
V+ RTN - is the power return connection from the module to
the bus. All ground returns connect to this point from internal to the module in a star fashion. All external ground connections to this point should also be made in a similar fashion.
The V+ capacitors should be returned to this pin as close as
possible. Wire sizing to this pin connection should be made
according to the required current.
E/A OUT - is the current loop error amp output connection.
It is brought out for allowing various loop compensation circuits to be connected between this and E/A-.
E/A- -is the current loop error amp inverting input connection. It is brought out for allowing various loop compensation circuits to be connected between this and E/A OUT.
SIG GND - is a ground pin that connects to the ground plane
for all low powered circuitry inside the hybrid.
HALL A, B & C - are the hall input pins from the hall devices
in the motor. These pins are internally pulled up to 15 volts.
The halls reflect a 120/240 degree commutation scheme.
+15V - is a regulated +15 volt output available for external uses.
Up to 20 mA is available at this pin. A 10 microfarad capacitor
should be connected as close to this pin as possible and returned to SIG GND along with a 0.22 microfarad monolithic
ceramic capacitor. CAUTION: See Voltage Regulator Power
Dissipation.
DISABLE -is a pin for externally disabling the output bridge. A
TTL logic low will enable the bridge, and a TTL logic high will
disable it. It is internally pulled low by a 5K ohm resistor.
L1 - is a pin for connecting an external inductor to the DC DC converter for generating -15 volts. A 47 μH switching inductor capable of running at 250 KHz and about 1 amp of DC
current shall be used. Connect the inductor between L1 and
SIG GND.
VOLTAGE REGULATOR POWER DISSIPATION - To figure voltage regulator power dissipation and junction temperature, use
the following as an example:
Given:
V+ = 28V, MSK4360 +15V IQ = 80mA, -15V IQ = 40mA.
External Loads: +15V = 20 mA, -15V = 20 mA
-15V Converter Efficiency = 50%
PDISS due to +15V IQ,80 mA x 13V = 1.04 W
PDISS due to -15V IQ, (40 mA / 0.5) x 13V = 1.04 W
PDISS due to +15V Ext load, 20 mA x 13V = 260 mW
PDISS due to -15V Ext load, (20 mA / 0.5) x 13V = 620mW
PDISS Total = 1.04W + 1.04 W + 260 mW + 520mW = 2.86W
3.12W x 13°C/W = 28°C RISE above case temperature
Maximum Case Temperature = 150°C - 41°C = 109°C
-15 V- is a regulated -15 volt output available for external uses.
Up to 20 mA is available at this pin. A 10 microfarad capacitor
should be connected as close to this pin as possible and returned to SIG GND along with a 0.22 microfarad monolithic
ceramic capacitor. CAUTION: See Voltage Regulator Power
Dissipation
3
8548-74 Rev. N 12/14
APPLICATION NOTES CONTINUED
COMMUTATION TRUTH TABLE
HALL SENSOR PHASING
ICOMMAND = POS.
ICOMMAND = NEG.
120°
1
0
X
= High Level
= Low Level
= Don't Care
HALL
A
HALL
B
HALL
C
AØ
BØ
CØ
AØ
BØ
CØ
1
0
0
H
-
L
L
-
H
1
1
0
-
H
L
-
L
H
0
1
0
L
H
-
H
L
-
0
1
1
L
-
H
H
-
L
0
0
1
-
L
H
-
H
L
1
0
1
H
L
-
L
H
-
1
1
1
-
-
-
-
-
-
0
0
0
-
-
-
-
-
-
X
X
X
L
L
L
L
L
L
H
L
-
= SOURCE
= SINK
= OPEN
NOTE:
Because of the true 4 quadrant method of output switching,
the output switches will PWM between the ICOMMAND POSITIVE
and ICOMMAND NEGATIVE states, with the average percentage
based on ICOMMAND being a positive voltage and a negative
voltage. With a zero voltage ICOMMAND, the output switches will
modulate with exactly a 50% duty cycle between the
ICOMMAND POSITIVE and ICOMMAND NEGATIVE states.
4
8548-74 Rev. N 12/14
APPLICATION NOTES CONTINUED
BUS VOLTAGE FILTER CAPACITORS
The size and placement of the capacitors for the DC bus has a direct bearing on the amount of noise filtered and also on the size
and duration of the voltage spikes seen by the bridge. What is being created is a series RLC tuned circuit with a resonant frequency that
is seen as a damped ringing every time one of the transistors switches. For the resistance, wire resistance, power supply impedance
and capacitor ESR all add up for the equivalent lumped resistance in the circuit. The inductance can be figured at about 30 nH per inch
from the power supply. Any voltage spikes are on top of the bus voltage and the back EMF from the motor. All this must be taken into
account when designing and laying out the system. If everything has been minimized, there is another solution. A second capacitance
between 5 and 10 times the first capacitor and it should either have some ESR or a resistor can be added in series with the second
capacitor to help damp the voltage spikes.
Be careful of the ripple current in all the capacitors. Excessive ripple current, beyond what the capacitors can handle, will destroy the
capacitors.
REGULATED VOLTAGE FILTER CAPACITORS
It is recommended that about 10 μF of capacitance (tantalum electrolytic) for bypassing the + and -15V regulated outputs be
placed as close to the module pins as practical. Adding ceramic bypass capacitors of about 0.1 μF to 1 μF will aid in suppressing noise
transients.
GENERAL LAYOUT
Good PC layout techniques are a must. Ground plane for the analog circuitry must be used and should be tied back to the SIG GND.
Ground plane for the power circuitry should be tied back to the V+ RTN pin, pin 16. Pin 16 should be connected to pin 10 external to the
hybrid by a single thick trace. This will connect the two ground planes together.
LOW POWER STARTUP
When starting up a system utilizing the MSK4360 for the first time, there are a few things to keep in mind. First, because of the small
size of the module, short circuiting the output phases either to ground or the DC bus will destroy the bridge. The current limiting and
control only works for current actually flowing through the bridge. The current sense resistor has to see the current in order for the
electronics to control it. If possible, for startup use a lower voltage and lower current power supply to test out connections and the low
current stability. With a limited current supply, even if the controller locks up, the dissipation will be limited. By observing the E/A OUT pin
which is the error amp output, much can be found out about the health and stability of the system. An even waveform with some rounded
triangle wave should be observed. As current goes up, the DC component of the waveform should move up or down. At full current (with
a regular supply) the waveform should not exceed +8 volts positive peak, or -8 volts negative peak. Some audible noise will be heard
which will be the commutation frequency. If the motor squeals, there is instability and power should be removed immediately unless
power dissipation isn't excessive due to limited supply current.NFor compensation calculations, refer to the block diagram for all
information to determine the amplifier gain for loop gain calculations.
5
8548-74 Rev. N 12/14
MSK4360 TEST CIRCUIT
6
8548-74 Rev. N 12/14
MECHANICAL SPECIFICATIONS
ESD TRIANGLE INDICATES PIN 1
WEIGHT = 41.7 GRAMS TYPICAL
ALL DIMENSIONS ARE SPECIFIED IN INCHES
ORDERING INFORMATION
MSK4360 H U
LEAD CONFIGURATIONS
S= STRAIGHT; U= BENT UP; D= BENT DOWN
SCREENING
BLANK= INDUSTRIAL; H=MIL-PRF-38534 CLASS H
GENERAL PART NUMBER
The above example is a Military grade hybrid with leads bent up.
7
8548-74 Rev. N 12/14
REVISION HISTORY
MSK
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.
8
8548-74 Rev. N 12/14