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參數(shù)資料
| 型號(hào)： | MSA240 |
| 廠商： | Apex Microtechnology Corporation |
| 英文描述： | PULSE WIDTH MODULATION AMPLIFIER |
| 中文描述： | 脈寬調(diào)制放大器 |
| 文件頁(yè)數(shù)： | 1/4頁(yè) |
| 文件大小： | 300K |
| 代理商： | MSA240 |
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
1
FEATURES
LOW COST
HIGH VOLTAGE - 100 VOLTS
HIGH OUTPUT CURRENT - 20 AMPS
2kW OUTPUT CAPABILITY
VARIABLE SWITCHING FREQUENCY
APPLICATIONS
BRUSH MOTOR CONTROL
MRI
MAGNETIC BEARINGS
CLASS D SWITCHMODE AMPLIFIER
DESCRIPTION
The MSA240 is a surface mount constructed PWM amplifier
that provides a cost effective solution in many industrial applica-
tions. The MSA240 offers outstanding performance that rivals
many much more expensive hybrid components. The MSA240
is a complete PWM amplifier including an oscillator, comparator,
error amplifier, current limit comparators, 5V reference, a smart
controller and a full bridge output circuit. The switching frequency
is user programmable up to 50 kHz. The MSA240 is built on
a thermally conductive but electrically insulating substrate that
can be mounted to a heatsink.
EQUIVALENT CIRCUIT DIAGRAM
58-PIN DIP
PACKAGE STYLE KC
TYPICAL APPLICATION
TORQUE MOTOR CONTROL
With the addition of a few external components the MSA240
becomes a motor torque controller. In the MSA240 the source
terminal of each low side MOSFET driver is brought out for
current sensing via R
S
A and R
S
B. A1 is a differential amplifier
that amplifies the difference in currents of the two half bridges.
This signal is fed into the internal error amplifier that mixes the
current signal and the control signal. The result is an input
signal to the MSA240 that controls the torque on the motor.
EXTERNAL CONNECTIONS
VIEW FROM
COMPONENT SIDE
R
OSC
R
RAMP
+
SINGLE
POINT
GND
C3
C1
C2
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