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MSA240KC

音频模块和开发工具 pulse width modulation 100v 20a

器件类别:模拟混合信号IC    信号电路   

厂商名称:Cirrus Logic(凌云半导体)

厂商官网:http://www.cirrus.com

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器件参数
参数名称
属性值
厂商名称
Cirrus Logic(凌云半导体)
零件包装代码
DMA
包装说明
,
针数
58
Reach Compliance Code
unknown
其他特性
ALSO REQUIRES 3V TO 100V SUPPLY
模拟集成电路 - 其他类型
ANALOG CIRCUIT
JESD-30 代码
R-XDMA-T58
JESD-609代码
e3
功能数量
1
端子数量
58
最高工作温度
85 °C
最低工作温度
-40 °C
封装主体材料
UNSPECIFIED
封装形状
RECTANGULAR
封装形式
MICROELECTRONIC ASSEMBLY
峰值回流温度(摄氏度)
NOT SPECIFIED
认证状态
Not Qualified
最大供电电压 (Vsup)
16 V
最小供电电压 (Vsup)
14 V
标称供电电压 (Vsup)
15 V
表面贴装
NO
温度等级
INDUSTRIAL
端子面层
TIN
端子形式
THROUGH-HOLE
端子位置
DUAL
处于峰值回流温度下的最长时间
NOT SPECIFIED
文档预览
rom
P r o d
MSA240
t i o
n F
F r o m
u c t
I
I
n n o v a
nnova
MSA240
MSA240
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
58-PIN DIP
PACKAGE STYLE KC
TYPICAL APPLICATION
SINGLE POINT GND @ 26
20
RRAMP
1
24
ROSC
22
19
58
2,18,26
28
23
SIG DIG PWR
AC
GND RET GND
BACK
PLATE
A OUT
35-39
CLK/2 OUT
RRAMP IN
CLK OUT
ROSC
+5V REF OUT
PWM 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.
13 +IN
17 E/A OUT
16 E/A -IN
15 E/A +IN
CONTROL
SIGNAL
2.5V
Is B
54-57
Is A
40-43
B OUT
49-53
EQUIVALENT CIRCUIT DIAGRAM
V
CC
5V REF
OUT
SIGNAL
GND
A1
Rs A
Rs B
29
19
26
18
2
23
5V
REF
SIGNAL
GND
SIGNAL
GND
DIGITAL
RETURN
1K
.01F
200mV
2.5V
30-34
+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
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.
44-48
+Vs
+
-
+
-
.01F
I
LIM
B
7
10
22
Q1
Q2
35-39
A OUT
1K
2.68K
I
LIM
A/SHDN
R
OSC
SMART
CONTROLLER
Q3
D1
49-53
B OUT
2200pF
CLK OUT
E/A OUT
E/A -IN
E/A +IN
+IN
R
RAMP
IN
CLK/2 OUT
CLK IN
AC BACK
PLATE
APEX TP
PWR
GND
OSC
24
17
16
15
13
1
20
21
28
27
58
1F
5.36K
EXTERNAL CONNECTIONS
I
LIM
A/SHDN
CLK/2 OUT
SIG GND
SIG GND
+5V OUT
DIG RTN
EA OUT
CLK IN
R
OSC
EA +IN
EA -IN
CLK OUT
R
RAMP
IN
NC
NC
SIG GND
APEX TP
AC BACK
PLATE
SINGLE
POINT
GND
30 29
Q4
D2
54-57
I SENSE B
I
LIM
B
-
+
R2
R3
+IN
NC
NC
NC
NC
NC
NC
+
-
40-43
I SENSE A
1
2
3
4
5
6
7
8
9
NC
10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28
R
RAMP
VIEW FROM
COMPONENT SIDE
C1
C2
+
R
OSC
C3
2200pF
CLK/2
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
PWR
GND
NC
I
SENSE
B
B OUT
+Vs
I
SENSE
A
A OUT
+Vs
V
CC
NOTES: 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
MSA240U
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MAY 2009
1
APEX − MSA240UREVD
MSA240
ABSOLUTE MAXIMUM RATINGS
P r o d u c t I n n o v a t i o nF r o m
SUPPLY VOLTAGE, VS
SUPPLY VOLTAGE, VCC
OUTPUT CURRENT, peak
POWER DISSIPATION, internal, DC
SIGNAL INPUT VOLTAGES
TEMPERATURE, pin solder, 10s
TEMPERATURE, junction
2
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE, case
100V
16V
30A, within SOA
250W
3
5.4V
225°C.
175°C.
-40° to 105°C.
-40° to 85°C.
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 CURRENT, pin 22
5V REFERENCE OUTPUT
VOLTAGE
LOAD CURRENT
OUTPUT
TOTAL R
ON
, both MOSFETs
4
CURRENT, continuous
CURRENT, peak
OUTPUT MOSFET BODY DIODE
CONTINUOUS CURRENT
FORWARD VOLTAGE
REVERSE RECOVERY
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
NOTES: 1.
2.
3.
4.
I
O
= 20A , T
J
= 85°C
100mS
TEST CONDITIONS
1
Full temperature range
Full temperature range
Full temperature range
Full temperature range
Full temperature range
R
L
= 2KΩ
MIN
TYP
MAX
9
500
150
4
1
96
1
.2
4.8
7
7
Full temperature range
4.85
0.6
5.15
2
155
20
30
20
I = 16A
I
F
= 16A
3
14
22kHz switching
22kHz switching
1.3
250
60
15
4
100
16
28
18
10
1.2
14
85
UNITS
mV
nA
nA
V
V/µS
dB
MHz
V
V
nS
nS
µA
V
mA
mΩ
A
A
A
V
nS
V
V
mA
mA
mA
°C/W
°C/W
°C/W
0
Full temperature range
Full temperature range
Full temperature range
Full temperature range
-40
Unless otherwise noted: T
C
=25
°
C, V
CC
= 15V, V
S
= 60V
Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation
to achieve high MTBF.
Each of the two output transistors on at any one time can dissipate 125W.
Maximum specification guaranteed but not tested.
2
MSA240U
P r o d u c t I n n o v a t i o nF r o m
MSA240
CLOCK LOADING
NORMALIZED FREQUENCY, (%)
INTERNAL POWER DISSIPATION, (W)
100
75
50
25
0
NORMALIZED FREQUENCY, (%)
125
POWER DERATING
100
100.2
CLOCK FREQUENCY OVER TEMP.
100.0
99.8
99.6
99.4
99.2
-40 -20
0 20 40 60 80 100
CASE TEMPERATURE, (C)
99
98
FREQUENCY = 44KHz
97
1M
100K
10K
CLOCK LOAD RESISTANCE, ()
5
0
20
40
60
80
100
CASE TEMPERATURE, (C)
20
FLYBACK CURRENT, I
SD
(A)
16
12
REVERSE DIODE
TOTAL VOLTAGE DROP, (V)
TOTAL VOLTAGE DROP
4
3
2
1
0
0
T
C
=
85
C
=2
5C
=1
T
J
4
0
0.4
0.6
0.8
1.0
1.2
SOURCE TO DRAIN DIODE VOLTAGE
25
CONTINUOUS AMPS
20
DUTY CYCLE, (%)
T
J
=2
5C
8
25
T
C
C
4
8
12
16
OUTPUT CURRENT, (A)
20
CONTINUOUS OUTPUT
A OUT
80
60
40
20
B OUT
V
CC
QUIESCENT CURRENT, (mA)
100
DUTY CYCLE VS. ANALOG INPUT
24
20
16
12
8
VCC QUIESCENT CURRENT
15
10
5
0
0
50% DUTY CYCLE
25
50
75
CASE TEMPERATURE, (C)
100
0
1.5
2.0
2.5
3.0
3.5
ANALOG INPUT, (V)
4
0
10
20
30
40
50
SWITCHING FREQUENCY, F (kHz)
8
NORMALIZED QUIESCENT CURRENT, (%)
V
S
QUIESCENT CURRENT, (mA)
101
100
99
98
V
S
QUIESCENT CURRENT, I
Q
(mA)
102
VCC QUIESCENT CURRENT
5
VS QUIESCENT CURRENT
VS QUIESCENT CURRENT vs. FREQUENCY
4
6
3
4
2
97
-40 -20 0 20 40 60 80 100
CASE TEMPERATURE, (C)
NORMAL or SHUTDOWN
OPERATION
F = 22kHz,
50% DUTY CYCLE
20
40
60
V
S
, (V)
80
100
2
V
S
= 60V,
50% DUTY CYCLE
0
0
10
20
30
40
50
SWITCHING FREQUENCY, F (kHz)
1
0
MSA240U
3
MSA240
GENERAL
P r o d u c t I n n o v a t i o nF r o m
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 automate tasks
such as calculations for stability, internal power dissipation,
current limit, heat sink selection, Apex Precision Power’s com-
plete Application Notes library, Technical Seminar Workbook
and Evaluation Kits.
Figure 2. Accurate milliohm power resistors are required and
there are several sources for these listed in the Accessories
Vendors section of the Databook.
FIGURE 2. CURRENT LIMIT WITH OPTIONAL SHUTDOWN
IlimA/SHDN
PWM AMPLIFIER
Isense A
Isense B
54-57
Rs A
Rs B
IlimB
7
C
9R
C
5V SHDN
SIGNAL
R
PWR
GND
58
10
R
40-43
OSCILLATOR
The MSA240 includes a user frequency programmable
oscillator. The oscillator determines the switching frequency
of the amplifier. The switching frequency of the amplifier is 1/2
the oscillator frequency. Two resistor values must be chosen
to properly program the switching frequency of the amplifier.
One resistor, R
OSC
, sets the oscillator frequency. The other
resistor, R
RAMP
, sets the internal ramp amplitude. In all cases
the ramp voltage will oscillate between 1.5V and 3.5V. See
Figure 1. If an external oscillator is applied use the equations
to calculate R
RAMP
.
To program the oscillator, R
OSC
is given by:
R
OSC
= (1.32X10
8
/ F) - 2680
where F is the desired
switching frequency
and:
R
RAMP
= 2 X R
OSC
Use 1% resistors with 100ppm drift (RN55C type resistors,
for example). Maximum
switching frequency
is 50kHz.
Example:
If the desired switching frequency is 22kHz then R
OSC
= 3.32K
and R
RAMP
= 6.64K. Choose the closest standard 1% values:
R
OSC
= 3.32K and R
RAMP
= 6.65K.
FIGURE 1. EXTERNAL OSCILLATOR CONNECTIONS
R
OSC
22
R
OSC
24
CLK OUT
21
CLK IN
20
CLK/2 OUT
R
RAMP
1
R
RAMP
IN
POWER SUPPLY BYPASSING
Bypass capacitors to power supply terminals +V
S
must be
connected physically close to the pins to prevent local parasitic
oscillation and overshoot. All +V
S
pins must be connected
together. Place an electrolytic capacitor of at least 10µF per
output amp required midpoint between these sets of pins. In
addition place a ceramic capacitor 1µF or greater directly at
each set of pins for high frequency bypassing. V
CC
is bypassed
internally.
GROUNDING AND PCB LAYOUT
Switching amplifiers combine millivolt level analog signals
and large amplitude switching voltages and currents with fast
rise times. As such grounding is crucial. Use a single point
ground at SIG GND (pin 26). Connect signal ground pins 2 and
18 directly to the single point ground on pin 26. Connect the
digital return pin 23 directly to pin 26 as well. Connect PWR
GND pin 58 also to pin 26. Connect AC BACKPLATE pin 28
also to the single point ground at pin 26. Connect the ground
terminal of the V
CC
supply directly to pin 26 as well. Make sure
no current from the load return to PWR GND flows in the analog
signal ground. Make sure that the power portion of the PCB
layout does not pass over low-level analog signal traces on
the opposite side of the PCB. Capacitive coupling through the
PCB may inject switching voltages into the analog signal path.
Further, make sure that the power side of the PCB layout does
not come close to the analog signal side. Fast rising output
signal can couple through the trace-to-trace capacitance on
the same side of the PCB.
PWM AMPLIFIER
SHUTDOWN
The MSA240 output stage can be turned off with a shutdown
command voltage applied to Pin 10 as shown in Figure 2. The
shutdown signal is OR’ed with the current limit signal and
simply overrides it. As long as the shutdown signal remains
high the output will be off.
DETERMINING THE OUTPUT STATE
The input signal is applied to +IN (Pin 13) and varies from
1.5 to 3.5 volts, zero to full scale. As +IN varies from 1.5 to 2.5
volts the A output "high" duty cycle (relative to ground) is greater
than the B output "high" duty cycle. The reverse occurs as the
input signal varies from 2.5 to 3.5 volts. When +IN = 2.5 volts
the duty cycles of both A and B outputs are 50%. Consequently,
when the input voltage is 1.5V the A output is close to 100%
duty cycle and the B output is close to 0% duty cycle. The
reverse occurs with an input voltage of 3.5V. The output duty
cycle extremes vary somewhat with switching frequency and
are internally limited to approximately 5% to 95% at 10kHz and
7% to 93% at 50kHz.
CURRENT SENSING
The low side drive transistors of the MSA240 are brought
out for sensing the current in each half bridge. A resistor from
each sense line to PWR GND (pin 58) develops the current
sense voltage. Choose R and C such that the time constant
is equal to 10 periods of the selected switching frequency. The
internal current limit comparators trip at 200mV. Therefore,
current limit occurs at I = 0.2/R
SENSE
for each half bridge. See
4
MSA240U
P r o d u c t I n n o v a t i o nF r o m
MSA240
ContACting CiRRUS LogiC SUPPoRt
For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact apex.support@cirrus.com.
International customers can also request support by contacting their local Cirrus Logic Sales Representative.
To find the one nearest to you, go to www.cirrus.com
IMPORTANT NOTICE
Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject
to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant
information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale
supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus
for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third
parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights,
copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives con-
sent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent
does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROP-
ERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE
SUITABLE FOR USE IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PROD-
UCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUS-
TOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE
CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES,
BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL
LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES.
Cirrus Logic, Cirrus, and the Cirrus Logic logo designs, Apex Precision Power, Apex and the Apex Precision Power logo designs are trademarks of Cirrus Logic, Inc.
All other brand and product names in this document may be trademarks or service marks of their respective owners.
MSA240U
5
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