P r o d u c t I
I
n n o v
v
a t i o n F
F r o m
rom
nno a
MSA260
MSA260
GenerAl DeScription
Pulse Width Modulation Amplifier
FeAtUreS
• LOW COST
• HIGH VOLTAGE - 450 VOLTS
• HIGH OUTPUT CURRENT - 20 AMPS
• 9kW OUTPUT CAPABILITY
• VARIABLE SWITCHING FREQUENCY
• IGBT FULL BRIDGE OUTPUT
The MSA260 is a surface mount constructed PWM
amplifier that provides a cost effective solution in many
industrial applications. The MSA260 offers outstand-
ing performance that rivals many much more expen-
sive hybrid components. The MSA260 is a complete
PWM amplifier including an oscillator, comparator, er-
ror amplifier, current limit comparators, 5V reference,
a smart controller and a full bridge IGBT output circuit.
The switching frequency is user programmable up to
50 kHz. The MSA260 is built on a thermally conductive
but electrically insulating substrate that can be mount-
ed to a heatsink.
ApplicAtionS
• BRUSH MOTOR CONTROL
• MRI
• MAGNETIC BEARINGS
• CLASS D SWITCHMODE AMPLIFIER
eqUivAlent circUit DiAGrAM
MSA260U
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2008
(All Rights Reserved)
nov 2008
APEX − MSA260UREVC
MSA260
P r o d u c t I n n o v a t i o nF r o m
chArActeriSticS AnD SpeciFicAtionS
AbSolUte MAxiMUM rAtinGS
parameter
SUPPLY VOLTAGE
SUPPLY VOLTAGE
OUTPUT CURRENT, peak, within SOA
POWER DISSIPATION, internal, DC
SIGNAL INPUT VOLTAGES
TEMPERATURE, pin solder, 10s
TEMPERATURE, junction
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE, case
(Note 2)
−40
−40
(Note 3)
Symbol
V
S
V
CC
Min
Max
450
16
30
250
5.4
225
150
105
85
Units
V
V
A
W
V
°C
°C
°C
°C
SpeciFicAtionS
parameter
error AMpliFier
OFFSET VOLTAGE
BIAS CURRENT, initial
OFFSET CURRENT, initial
COMMON MODE VOLTAGE RANGE, pos.
SLEW RATE
OPEN LOOP GAIN
UNITY GAIN BANDWIDTH
clocK
LOW LEVEL OUTPUT VOLTAGE
HIGH LEVEL OUTPUT VOLTAGE
RISE TIME
FALL TIME
BIAS CURRENT, pin 22
5v reFerence oUtpUt
VOLTAGE
LOAD CURRENT
oUtpUt
V
CE(ON)
, each active IGBT
CURRENT, continuous
CURRENT, peak
FlYbAcK DioDe
CONTINUOUS CURRENT
FORWARD VOLTAGE
REVERSE RECOVERY
I
F
= 15A
I
F
= 15A
0.2
44
200
0.7
20
1.5
150
A
V
nS
(Note 4)
I
CE
= 15A
V
S
= 400V, F = 22kHz
1mS, V
S
= 400V, F = 22kHz
2.25
20
30
V
A
A
4.85
5.15
2
V
mA
Full temperature range
Full temperature range
Full temperature range
4.8
7
7
0.6
0.2
V
V
nS
nS
µA
(Note 3)
Full temperature range
Full temperature range
Full temperature range
Full temperature range
Full temperature range
R
L
= 2KΩ
0
1
96
1
9
500
150
4
mV
nA
nA
V
V/µs
dB
MHz
test conditions (note )
Min
typ
Max
Units
2
MSA260U
P r o d u c t I n n o v a t i o nF r o m
MSA260
test conditions (note )
Min
5
14
parameter
poWer SUpplY
VOLTAGE, V
S
VOLTAGE, V
CC
CURRENT, V
S
, quiescent
CURRENT, V
CC
, quiescent
CURRENT, V
CC
, shutdown
therMAl
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
typ
400
15
9
Max
450
16
28
18
10
Units
V
V
mA
mA
mA
°C/W
°C/W
°C
22kHz switching
22kHz switching
Full temperature range
Full temperature range
-40
1
14
85
NOTES:
1. Unless otherwise noted: T
C
=25°C, V
CC
= 15V, V
S
= 400V, F = 22kHz.
2. Long term operation at the maximum junction temperature will result in reduced product life. Derate
internal power dissipation to achieve high MTBF.
3. Each of the two output transistors on at any one time can dissipate 125W.
4. Maximum specification guaranteed but not tested.
MSA260U
MSA260
P r o d u c t I n n o v a t i o nF r o m
externAl connectionS
R
RAMP
VIEW FROM
COMPONENT SIDE
C1
C2
+
R
OSC
C3
SINGLE
POINT
GND
MSA260U
P r o d u c t I n n o v a t i o nF r o m
MSA260
58-pin Dip
pAcKAGe StYle Kc
tYpicAl ApplicAtion
torqUe Motor control
With the addition of a few exter-
nal components the MSA260 be-
comes a motor torque controller.
In the MSA260 the source termi-
nal of each low side IGBT driver
is brought out for current sensing
via R
S
A and R
S
B. A1 is a differen-
tial amplifier that amplifies the dif-
ference 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 sig-
nal to the MSA260 that controls
the torque on the motor.
GenerAl
Please read Application Note 30 “PWM Basics”. Refer also to Application Note 1 “General Operating Consider-
ations” for helpful information regarding power supplies, heat sinking, mounting, SOA interpretation, and specifica-
tion interpretation. Visit www.cirrus.com for design tools that help automate tasks such as calculations for stability,
internal power dissipation, current limit, heat sink selection, Cirrus’s complete Application Notes library, Technical
Seminar Workbook and Evaluation Kits.
MSA260U
5
测试/测量
