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PDF ( 数据手册 , 数据表 ) MSA240

零件编号 MSA240
描述 PULSE WIDTH MODULATION AMPLIFIER
制造商 APEX MICROTECHNOLOGY
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MSA240 数据手册, 描述, 功能
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MSMAS2A42400
Pulse Width Modulation Amplifiers
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
TYPICAL APPLICATION
58-pin DIP
PACKAGE STYLE KC
CONTROL
SIGNAL
SINGLE POINT GND @ 26
20 CLK/2 OUT
RRAMP 1 RRAMP IN
24
CLK OUT
ROSC 22
ROSC
19 +5V REF OUT
13 +IN
28 2,18,26 23
58
AC
BACK
SIG DIG PWR
GND RET GND
PLATE
A OUT 35-39
PWM AMPLIFIER
17 E/A OUT
B OUT 49-53
16 E/A -IN
15 E/A +IN
2.5V
Is B
54-57
Is A
40-43
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A1
Rs A
VCC 29
5V REF
OUT
SIGNAL
GND
19
26
18
2
23
ILIM B 7
ILIM A/SHDN 10
ROSC 22
5V
REF
SIGNAL
GND
SIGNAL
GND
DIGITAL
RETURN
1K
200mV
+
-
.01F
1K
+
-
2.68K
.01F
2200pF OSC
CLK OUT 24
SMART
CONTROLLER
E/A OUT 17
E/A -IN 16
E/A +IN 15
+IN 13
RRAMP IN 1
CLK/2 OUT 20
CLK IN 21
-
+
5.36K
CLK/2
R2
R3
2200pF
+
-
Rs B
2.5V
30-34
+Vs
44-48
+Vs
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
Q1 Q2
35-39
current sensing via RSA and RSB. A1 is a differential amplifier
that amplifies the difference in currents of the two half bridges.
A OUT This signal is fed into the internal error amplifier that mixes the
D1 current signal and the control signal. The result is an input
Q3 49-53 signal to the MSA240 that controls the torque on the motor.
B OUT EXTERNAL CONNECTIONS
D2
Q4 54-57
I SENSE B
40-43
I SENSE A
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
VIEW FROM
COMPONENT SIDE
RRAMP
ROSC
SINGLE
POINT
GND
C1 C2+ C3
AC BACK
PLATE
28
APEX TP 27
PWR
GND
58
1F
BACK PLATE
58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
PWR
GND
ISENSE B
B OUT
+Vs
ISENSE A
A OUT
+Vs
NOTES: C2 IS ELECTROLYTIC ≥10UF PER AMP OUTPUT CURRENT
VCC
C1,3 HIGH QUALITY CERAMIC ≥1.0UF
ALL +Vs MUST BE TIED TOGETHER
ALL SIG GND PINS MUST BE TIED TOGETHER
SINGLE POINT GROUND @ PIN 26
MSA2ht4tp0:U//www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
APEX MSA2M40AUYR2E0V0D91
Datasheet pdf - http://www.DataSheet4U.co.kr/












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