MIL-PRF-38534 CERTIFIED
M.S.KENNEDY CORP.
DUAL HIGH VOLTAGE/
VERY HIGH CURRENT
OPERATIONAL AMPLIFIER
186
4707 Dey Road Liverpool, N.Y. 13088
(315) 701-6751
FEATURES:
Space Efficient Dual Amplifier
High Voltage Operation:
Single Supply: +8V to +60V
Dual Supply: ±4V to±30V
High Output Current: 8 Amp Continuous Per Amplifier
High Speed: 9V/µS
Low Quiescent Current: 26 mA Per Amplifier Typ.
Adjustable Current Limits
Thermal Shutdown
Enable/Status Pin For Output Disable Control
Available with Three Lead Form Configurations
Contact MSK for MIL-PRF-38534 Qualification Status
DESCRIPTION:
The MSK 186 is a dual high power operational amplifier ideal for use with a wide variety of loads. With operation
from either single or dual supplies, it offers excellent design flexibility. Power dissipation is kept to a minimum with a
quiescent current rating of only 26mA per amplifier, while 8 Amps of continuous available output current makes it a
very good low cost choice for motor drive circuits and audio amplification. The design is internally protected against
current overloads and overtemperature conditions. The current limit can also be user-selected through the use of a
resistor/potentiometer or voltage out/current out DAC. The MSK 186 is packaged in a hermetically sealed, isolated 18
pin power DIP with bolt down tabs for applications that require heat sinking.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
Servo Driver
Actuator Driver
Audio Amplifier
Power Supplies
Bridge Amps
Stereo Amps
PIN-OUT INFORMATION
1
2
3
4
5
6
7
8
9
1
-VCC 1
+VCC 1
OUTPUT 1
OUTPUT 2
-VIN 2
+VIN 2
VR 2
ILIM 2
E/S 2
18
17
16
15
14
13
12
11
10
PRELIMINARY
E/S 1
ILIM 1
VR 1
+VIN 1
-VIN 1
OUTPUT 2
OUTPUT 2
+VCC 2
-VCC 2
Rev. B 11/06
7
ABSOLUTE MAXIMUM RATINGS
VCC
±IOUT
VIND
VCM
TJ
Total Supply Voltage
60V
Peak Output Current (within S.O.A.)
10A
Input Voltage
(-VCC)-0.5V to (+VCC)+0.5V
Input Voltage
(-VCC)-0.1V to (+VCC)-3V
Junction Temperature
Internal Protection
(See Application Note)
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-65°C to +150°C
TST Storage Temperature Range
300°C
TLD Lead Temperature Range
(10 seconds)
TC Case Operating Temperature
-55°C to +125°C
MSK186H/E
-25°C to +85°C
MSK186
RTH Thermal Resistance (Per Amplifier)
1.2°C/W
Junction to Case @ 125°C
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ELECTRICAL SPECIFICATIONS
Test Conditions 1
Parameter
Group A
2
MSK186H/E
MSK186
Typ.
Max.
Min.
Typ.
Max.
Units
8
-
60
8
-
60
V
-
±26
±35
-
±26
±38
mA
-
-
-
mA
±6
-
mA
Subgroup
Min.
1
STATIC
Supply Voltage Range 3
Quiescent Current (Per Amp)
-Vcc to +Vcc
VIN=0V
Quiescent Current (Per Amp) Overcurrent or TempShutdown Mode VIN=0V
2,3
-
±26
±38
-
-
±6
-
-
-
±1
±7.5
-
±1
±10
mV
-
-
±20
-
µV/°C
-
±100
±750
nA
-
±5
±75
nA
INPUT
Input Offset Voltage
VIN=0V
1
Input Offset Voltage Drift
VIN=0V
-
-
±20
Input Bias Current 3
VIN=0V
1
-
±100 ±500
Input Offset Current 3
VIN=OV
1
±1
Input Impedance
-
-
10
-
Ω
6
-
-
6
-
pF
95
-
75
95
-
dB
-
70
-
-
70
-
nV/√HZ
4
±26.5
±27.5
-
±26.5 ±27.5
-
V
IOUT=8.0A
4
±25
±26
-
±25
±26
-
V
Continuous
4
±8
-
-
±8
-
-
A
VE/S High- Output Enabled E/S Open or High
4
VR+2.4
-
-
VR+2.4
-
-
V
VE/S Low- Output Disabled E/S Forced Low
4
-
-
VR+0.8
-
-
VR+0.8
V
IE/S High- Output Enabled E/S Indicates High
-
-
-50
-
-
-50
-
µA
IE/S Low- Output Disabled E/S Indicates Low
f=DC Differential
-
f=DC Differential
-
-
Common Mode Rejection Ratio 3 (-VCC)-0.1≤ VIN ≤ (+VCC)-3V
1
80
Input Voltage Noise Density
-
Input Capacitance
±50
±5
f=1KHZ
-
10
7
7
OUTPUT
IOUT=2.0A
Output Voltage Swing
Output Current 3
Enable/
Shutdown Input 3
3
-
-
-55
-
-
-55
-
µA
Output Disable Time
-
-
1
-
-
1
-
µS
Output Enable Time
-
-
3
-
-
3
-
µS
AV=1 VOUT= 50Vp-p RL=4Ω
-
-
9
-
-
9
-
V/µS
VOUT=±25V RL=1KΩ
4
100
110
-
100
110
-
dB
AV=-10 50V Step
-
20
-
-
20
-
µS
TRANSFER CHARACTERISTICS
Slew Rate
Open Loop Voltage Gain 3
Settling Time ±0.1%
3
-
NOTES:
1
2
3
4
5
6
Unless otherwise specified ±VCC= ±30VDC, VR=0V and E/S Pin is open.
All electrical specifications apply to each amplifier.
Devices shall be capable of meeting the parameter, but need not to be tested. Typical parameters are for reference only.
Industrial grade and 'E' 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.
Subgroup 1,4 TA=TC=+25°C
Subgroup 2 TA=TC=+125°C
Subgroup 3 TA=TC=-55°C
7 Continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle.
2
PRELIMINARY
Rev. B 11/06
APPLICATION NOTES
THERMAL PROTECTION:
The amplifiers are equipped with thermal protection circuitry
that protects each amplifier from damage caused by excessive
junction temperature. The output is disabled when the junction
temperature reaches approximately 160°C. After the junction
temperature cools to approximately 140°C, the output is again
enabled. The thermal protection may cycle on and off depending on the output load and signal conditions; this may have an
undesirable effect on the load.
It should be noted that even though this internal protection
circuitry does protect against overload conditions, it does not
take the place of proper heat sinking. For reliable operation,
junction temperature should be limited to 150°C, maximum.
POWER SUPPLIES:
For the MSK 186 maximum total supply voltage is specified
as 60V. However, dual and unbalanced power supply operation
is permissible as long as total supply voltage does not exceed
60V.
POWER SUPPLY BYPASSING:
Power supply terminals must be effectively decoupled with a
high and low frequency bypass circuit to avoid power supply
induced oscillation. An effective decoupling scheme consists
of a 0.1µF ceramic capacitor in parallel with a 10µF tantalum
capacitor for each power supply pin to ground. In addition, it is
recommended that a 0.01µF capacitor be placed between ±Vcc
as close to the amplifiers as possible.
ENABLE/STATUS PIN:
For the MSK 186 this pin actually has a dual function. First,
when the pin is forced low, the output stage is disabled. Second, it can be monitored to determine if the device is in thermal
shutdown. These functions can be used on the same device
with either single or dual supplies. For normal operation, the
E/S pin must be left open or pulled at least 2.4 volts above the
VR pin. In noisy applications, a small value capacitor between
the E/S pin and VR may be required.
To disable the output, the user must pull the E/S pin low, no
greater than 0.8V above VR. To once again enable the device,
the E/S pin must be brought at least 2.4 volts above VR or be
disconnected. It should be noted that when the E/S pin is high,
the internal thermal shutdown is still active.
If the E/S pin is used to monitor thermal shutdown, during
normal operation the voltage on the E/S pin is typically 3.5V
above VR. Once shutdown has occurred this voltage will drop
to approximately 350mV above VR.
CURRENT LIMIT:
The MSK 186 offers accurate, user-selectable current limit.
Unlike typical designs that use a power resistor in series with
the output to sense load, the MSK 186 senses the load indirectly and therefore does not require a resistor to handle the full
output current. Current limit is selected by controlling the input
to the ILIM pin (0 to 633µA).
The easiest method is to use a resistor or potentiometer
connected between VR and the ILIM pin. Use the following equation to select proper resistor value:
RCL= 75,000 -7.5KΩ
ILIM
A low level control signal (0-633µA) can also be used to control the current level digitally. If the pin is left open, the current
is programmed to OA, while connecting I LIM directly to VR sets
the output current to it's maximum, typically 10A.
SAFE OPERATING AREA:
The safe operating area curve is a graphical representation of
the power handling capability of the amplifier under various
conditions. Power dissipation of the device is equal to the product of the voltage across the output transistor times the output
current. As can be seen in the curve on page 5, safe operating
current decreases with an increase in temperature as well as an
increase in the voltage across the output transistor. Therefore,
for maximum amplifier performance it is important to keep case
temperature as low as possible and to keep ±Vcc as close to
the output rail as achievable.
VR PIN
The MSK 186 features a reference (VR) pin to which the ILIM
and the E/S pin are referred. VR simply provides a reference
point accessible to the user that can be set to V-, ground, or
any reference of the user's choice. VR cannot be set below the
negative supply or above (V+)-8V. If the minimum VS is used,
VR must be set at V-.
COMPENSATION:
For normal operation output compensation is not typically
required. However, if the MSK 186 is intended to be driven into
current limit the user may find that an R/C network is required.
A snubber network from the output to ground for each amplifier will provide stability. If driving large capacitive or inductive
loads, a snubber network will also enhance stability. Typically
3Ω to 10Ω in series with 0.01µF is acceptable.
TYPICAL CONNECTION DIAGRAM
3
PRELIMINARY
Rev. B 11/06
APPLICATION NOTES cont.
Figure 1
Adjustable Current Limit
Figure 2
Output Disable with a Single Supply
Figure 3
Thermal Shutdown Status With a Single Supply
Figure 4
Motor Drive Circuit
Figure 5
Parallel Output For Increased Output Current
4
PRELIMINARY
Rev. B 11/06
TYPICAL PERFORMANCE CURVES
5
PRELIMINARY
Rev. B 11/06
MECHANICAL SPECIFICATIONS
WEIGHT=25 GRAMS TYPICAL
ESD TRIANGLE INDICATES PIN 1
ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED.
ORDERING INFORMATION
186 H
U
LEAD CONFIGURATIONS
S= STRAIGHT; U= BENT UP; D= BENT DOWN
SCREENING
BLANK= INDUSTRIAL; E=EXTENDED RELIABILITY
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
PRELIMINARY
Rev. B 11/06