MSA240KC Cirrus Logic Inc, MSA240KC Datasheet
MSA240KC
Manufacturer Part Number
MSA240KC
Description
AMP PWM 100V 20A 58-DIP KC
Manufacturer
Cirrus Logic Inc
Series
Apex Precision Power™r
Datasheet
1.MSA240KC.pdf
(5 pages)
Specifications of MSA240KC
Module/board Type
PWM Amplifier
Description/function
Audio Amplifiers
Product
Audio Modules
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With
598-1469 - EVAL KIT FOR MSA240/MSA260
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
598-1416
MSA240KC
MSA240KC
MSA240U
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
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
I
LIM
CLK/2 OUT
AC BACK
SIGNAL
CLK OUT
APEX TP
R
A/SHDN
E/A OUT
The MSA240 is a surface mount constructed PWM amplifier
5V REF
RAMP
E/A -IN
E/A +IN
PLATE
CLK IN
GND
I
OUT
R
LIM
PWR
GND
V
OSC
http://www.cirrus.com
+IN
CC
IN
B
19
26
18
10
24
28
27
29
23
22
17
16
15
13
20
21
58
2
7
1
2200pF
2.68K
1F
SIGNAL
GND
SIGNAL
GND
DIGITAL
RETURN
+
-
REF
5V
5.36K
OSC
BACK PLATE
.01F
1K
1K
CLK/2
Pulse Width Modulation Amplifiers
200mV
P r o d u c t I n n o v a t i o n F r o m
P r o d u c t I n n o v a t i o n F r o m
.01F
+
+
-
-
MSA240
2200pF
R2
R3
CONTROLLER
+
-
SMART
Q1
Q3
Q4
Copyright © Cirrus Logic, Inc. 2009
Q2
D1
D2
54-57
40-43
(All Rights Reserved)
30-34
44-48
35-39
49-53
+Vs
A OUT
I SENSE B
I SENSE A
+Vs
B OUT
PWR
GND
58 57
TYPICAL APPLICATION
TORQUE MOTOR CONTROL
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
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
I
SENSE
56
1
With the addition of a few external components the MSA240
CONTROL
55
SIGNAL
2
B
54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
3
4
5
B OUT
COMPONENT SIDE
NOTES:
R RAMP
6
R OSC
VIEW FROM
2.5V
7
8
20
24
16
15
1
22
19
13
17
C2 IS ELECTROLYTIC ≥10UF PER AMP OUTPUT CURRENT
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
9
E/A OUT
E/A -IN
E/A +IN
+IN
CLK/2 OUT
R RAMP IN
CLK OUT
R OSC
+5V REF OUT
C1
SINGLE POINT GND @ 26
10
S
+Vs
11
A and R
12
13
A1
R
14
RAMP
I
2.5V
SENSE
15
S
PWM AMPLIFIER
B. A1 is a differential amplifier
APEX − MSA240UREVD
16
PLATE
28
BACK
AC
A
17
C2
+
2,18,26
18
54-57
19
PACKAGE STYLE KC
GND
A OUT
SIG
MSA240
Is B
20
Rs B
R
23
RET
DIG
21
OSC
Is A
22
40-43
PWR
GND
Rs A
MSA240
23
A OUT
B OUT
58
58-PIN DIP
C3
24
33 32
MAY 2009
+Vs
25
35-39
49-53
31
26 27 28
30 29
V
SINGLE
CC
POINT
GND
1
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MSA240KC Summary of contents
Page 1
MSA240 ...
Page 2
MSA240 ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS PARAMETER ERROR AMPLIFIER OFFSET VOLTAGE BIAS CURRENT OFFSET CURRENT COMMON MODE VOLTAGE RANGE SLEW RATE OPEN LOOP GAIN UNITY GAIN BANDWIDTH CLOCK LOW LEVEL OUTPUT VOLTAGE HIGH LEVEL OUTPUT VOLTAGE RISE TIME FALL TIME BIAS ...
Page 3
POWER DERATING 125 100 100 CASE TEMPERATURE, (C) REVERSE DIODE ...
Page 4
MSA240 GENERAL Please read Application Note 30 “PWM Basics” . Refer also to Application Note 1 “General Operating Considerations” for helpful information regarding power supplies, heat sinking, mounting, SOA interpretation, and specification interpretation. Visit www.Cirrus.com for design tools that help ...
Page 5
ContACting CiRRUS LogiC SUPPoRt For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North ...