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Apex Microtechnology에서 제조한 전자 부품 MP230은 전자 산업 및 응용 분야에서
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부품번호 MP230 기능
기능 POWER OPERATIONAL AMPLIFIER
제조업체 Apex Microtechnology
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MP230 데이터시트, 핀배열, 회로
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FEATURES
• LOW COST
• HIGH VOLTAGE - 100 VOLTS
• HIGH OUTPUT CURRENT - 30 AMPS
• 210 WATT DISSIPATION CAPABILITY
APPLICATIONS
• MOTOR DRIVE
• MAGNETIC DEFLECTION
• PROGRAMMABLE POWER SUPPLIES
• INDUSTRIAL AUDIO AMPLIFIER
TYPICAL APPLICATION
42-PIN DIP
PACKAGE TYPE FC
DESCRIPTION
The MP230 operational amplifier is a surface mount con-
structed component that provides a cost effective solution in
many industrial applications. The MP230 offers outstanding
performance that rivals many much more expensive hybrid
components yet has a footprint of only 4.7 sq in. The MP230
has many optional features such as four-wire current limit sens-
ing, a shutdown control and external compensation. In addition,
the class A/B output stage biasing can be turned off for lower
quiescent current with class C operation in applications where
crossover distortion is less important such as when driving motors,
for example. A boost voltage feature biases the output stage for
close linear swings to the supply rail for extra efficient operation.
The MP230 is built on a thermally conductive but electrically
insulating substrate that can be mounted to a heat sink.
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EQUIVALENT CIRCUIT DIAGRAM
MOTOR POSITION CONTROL
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The MOSFET output stage of the MP230 provides superior
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SOA performance compared to bipolar output stages where
secondary breakdown is a concern. The extended SOA is
ideal in motor drive applications where the back EMF of the
motor may impose simultaneously both high voltage and high
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current across the output stage transistors. In the figure above
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a mechanical to electrical feedback position converter allows
the MP230 to drive the motor in either direction to a set point
determined by the DAC voltage.
EXTERNAL CONNECTIONS
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected]
1




MP230 pdf, 반도체, 판매, 대치품
OPERATING
CONSIDERATIONS
MP230
GENERAL
Please read Application Note 1 “General Operating Consid-
erations” which covers stability, power supplies, heat sinking,
mounting, current limit, SOA interpretation, and specification
interpretation. Visit www.apexmicrotech.com for design tools
that help automate tasks such as calculations for stability,
internal power dissipation, current limit, heat sink selection,
Apex’s complete Application Notes library, Technical Seminar
Workbook and Evaluation Kits.
GROUND PINS
The MP230 has two ground pins (pins 2, 40). These pins
provide a return for the internal capacitive bypassing of the
small signal stages of the MP230. The two ground pins are not
connected together on the substrate. Both of these pins are
required to be connected to the system signal ground.
BALANCING RESISTOR SELECTION (RS1-RS4)
The MP230 uses parallel sets of output transistors. To ensure
that the load current is evenly shared among the transistors
external balancing resistors RS1-RS4 are required. To calculate
the required value for each of the resistors use: R = 4.5 / I2
,where I is the maximum expected output current. For example,
with a maximum output current of 10A each balancing resistor
should be 0.045 ohms. Each resistor dissipates 1.125W at the
maximum current. Use a non-inductive 2W rated resistor. A
ready source for such resistors is the IRC resistor series LR
available from Mouser Electronics.
SAFE OPERATING AREA
The MOSFET output stage of the MP230 is not limited by
second breakdown considerations as in bipolar output stages.
Only thermal considerations and current handling capabilities
limit the SOA (see Safe Operating Area graph on previous
page). The output stage is protected against transient flyback
by the parasitic diodes of the output stage MOSFET structure.
However, for protection against sustained high energy flyback
external fast-recovery diodes must be used.
COMPENSATION
The external compensation capacitor CC is connected to
pins 4 and 6. Unity gain stability can be achieved with CC =
470pF for a minimum phase margin of 60 degrees. At higher
gains more phase shift can usually be tolerated and CC can be
reduced resulting in higher bandwidth and slew rate. Use the
typical operating curves as a guide to select CC. A 100V NPO
(COG) type capacitor is required. Boost operation requires more
compensation or higher gains than with normal operation due
to the increased capacitance of the output transistors when
the output signal swings close to the supply rails.
OVERVOLTAGE PROTECTION
Although the MP230 can withstand differential input voltages
up to ±25V, in some applications additional external protection
may be needed. 1N4148 signal diodes connected anti-parallel
across the input pins is usually sufficient. In more demanding
applications where bias current is important diode connected
JFETs such as 2N4416 will be required. See Q1 and Q2 in
Figure 1. In either case the differential input voltage will be
clamped to ±0.7V. This is sufficient overdrive to produce the
maximum power bandwidth. Some applications will also need
over-voltage protection devices connected to the power supply
rails. Unidirectional zener diode transient suppressors are
recommended. The zeners clamp transients to voltages within
the power supply rating and also clamp power supply reversals
to ground. Whether the zeners are used or not the system
power supply should be evaluated for transient performance
including power-on overshoot and power-off polarity reversals
as well as line regulation. See Z1 and Z2 in Figure 1.
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POWER SUPPLY BYPASSING
Bypass capacitors to power supply terminals +VS and -VS
must be connected physically close to the pins to prevent local
parasitic oscillation in the output stage of the MP230. Use
electrolytic capacitors at least 10µF per output amp required.
Bypass the electrolytic capacitors with high quality ceramic
capacitors 0.1µF or greater. In most applications power
supply terminals +VB and -VB will be connected to +VS and -VS
respectively. Although +VB and -VB are bypassed internally it
is recommended to bypass +VB and -VB with 0.1µF externally.
Additionally, ground pins 2 and 40 must be connected to the
system signal ground.
CURRENT LIMIT
The two current limit sense lines are to be connected directly
across the current limit sense resistor. For the current limit to
work correctly pin 36 must be connected to the amplifier output
side and pin 35 connected to the load side of the current limit
resistor RLIM as shown in Figure 2. This connection will bypass
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APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
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