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MIL-PRF-38534 CERTIFIED
M.S.KENNEDY CORP.
4707 Dey Road Liverpool, N.Y. 13088
DUAL HIGH VOLTAGE/ VERY HIGH CURRENT OPERATIONAL AMPLIFIER
186
(315) 701-6751
FEATURES:
Space Efficient Dual Amplifier High Voltage Operation: Single Supply: +8V to +60V Dual Supply: 4V to30V High Output Current: 8 Amp Continuous Per Amplifier High Speed: 9V/S 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 -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 E/S 1 ILIM 1 VR 1 -VIN 1 +VIN 1 OUTPUT 2 OUTPUT 2 +VCC 2 -VCC 2
1
PRELIMINARY
Rev. A 11/05
ABSOLUTE MAXIMUM RATINGS

7
ELECTRICAL SPECIFICATIONS
Parameter STATIC Supply Voltage Range 3 Quiescent Current (Per Amp) -Vcc to +Vcc VIN=0V 1 2,3 Quiescent Current (Per Amp) Overcurrent or TempShutdown Mode VIN=0V INPUT Input Offset Voltage Input Offset Voltage Drift Input Bias Current 3 Input Offset Current 3 Input Impedance Input Capacitance VIN=0V VIN=0V VIN=0V VIN=OV f=DC Differential f=DC Differential 1 1 1 1 1 80 1 20 7.5 75 1 20 100 5 10 6 95 70
7
Test Conditions 1
2
Group A Subgroup Min.
MSK186H/E Typ. Max. Min.
MSK186 Typ. Max. Units
8 -
26 26 6
60 35 38 -
8 -
26 6
60 38 -
-
10 750 75 -
100 500 5 10 6 95 70
7
50 -
Common Mode Rejection Ratio 3 (-VCC)-0.1 VIN (+VCC)-3V Input Voltage Noise Density OUTPUT Output Voltage Swing Output Current 3 IOUT=2.0A IOUT=8.0A Continuous VE/S High- Output Enabled E/S Open or High Enable/ Shutdown Input 3 VE/S Low- Output Disabled E/S Forced Low IE/S High- Output Enabled E/S Indicates High IE/S Low- Output Disabled E/S Indicates Low Output Disable Time Output Enable Time TRANSFER CHARACTERISTICS Slew Rate Open Loop Voltage Gain 3 Settling Time 0.1% 3 AV=1 VOUT= 50Vp-p RL=4 VOUT=25V RL=1K AV=-10 50V Step 3 f=1KHZ
4 4 4 4 4 -
26.5 25 8 VR+2.4 -
27.5 26 -50 -55 1 3
VR+0.8 -
26.5 27.5 25 8 VR+2.4 26 -50 -55 1 3
VR+0.8 -
4 -
100 -
9 110 20
-
100 -
9 110 20
-
NOTES:
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=+25C Subgroup 2 TA=TC=+125C Subgroup 3 TA=TC=-55C 7 Continuous operation at or above absolute maximum ratings may adversely effect the device performance and/or life cycle. 1 2 3 4 5 6
2
PRELIMINARY
Rev. A 11/05

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)
-65C to +150C TST Storage Temperature Range 300C TLD Lead Temperature Range (10 seconds) TC Case Operating Temperature -55C to +125C MSK186H/E -25C to +85C MSK186 RTH Thermal Resistance (Per Amplifier) 1.2C/W Junction to Case @ 125C
V mA mA mA
mV V/C
nA nA
pF dB nV/HZ
V V A V V A A S S
V/S dB S
APPLICATION NOTES 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.
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 160C. After the junction temperature cools to approximately 140C, 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 150C, maximum.
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 0.1F ceramic capacitor in parallel with a 10F tantalum capacitor for each power supply pin to ground. In addition, it is recommended that a 0.01F 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 633A). 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 -7.5K ILIM A low level control signal (0-633A) can also be used to control the current level digitally. If the pin is left open, the current is programmed to OA, while connecting ILIM 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 3 to 10 in series with 0.01F is acceptable. 3
TYPICAL CONNECTION DIAGRAM PRELIMINARY Rev. A 11/05
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. A 11/05
TYPICAL PERFORMANCE CURVES
5
PRELIMINARY
Rev. A 11/05
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. A 11/05

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