CIRRUS MP108

MP108
• MP108A
MP108
• MP108A
t I n n o v a tt ii oo nn FFrroomm
PP rr oo dd uu cc tMP108A
MP108,
Power Operational Amplifier
FEATURES
• LOW COST
• HIGH VOLTAGE - 200 VOLTS
• HIGH OUTPUT CURRENT - 10 AMPS
• 100 WATT DISSIPATION CAPABILITY
• 300kHz POWER BANDWIDTH
APPLICATIONS
• INKJET PRINTER HEAD DRIVE
• PIEZO TRANSDUCER DRIVE
• INDUSTRIAL INSTRUMENTATION
• REFLECTOMETERS
• ULTRA-SOUND TRANSDUCER DRIVE
34-pin DIP
PACKAGE STYLE FD
TYPICAL APPLICATION
RF
+VS
DESCRIPTION
The MP108 operational amplifier is a surface mount constructed
component that provides a cost effective solution in many industrial applications. The MP108 offers outstanding performance
that rivals much more expensive hybrid components yet has a
footprint of only 4 sq in. The MP108 has many optional features
such as four-wire current limit sensing and external compensation.
The 300 kHz power bandwidth and 10 amp output of the MP108
makes it a good choice for piezo transducer drive applications.
The MP108 is built on a thermally conductive but electrically
insulating substrate that can be mounted to a heat sink.
+VS
RI
+VB
GND
PRINT
NOZZLE
COMMAND
VOLTAGE
-ILIM
CC2
GND
-VS
PIEZO
TRANSDUCER
-VB
CC
EQUIVALENT CIRCUIT DIAGRAM
+Vb
8
+Vb
4
-VS
C1
GND
3
BACK
PLATE
2
TP
1
R1
Cc2
R2
R3
15 +Vs
The MP108's fast slew rate and wide power bandwith make
it an ideal nozzle driver for industrial inkjet printers. The 10 amp
output capability can drive hundreds of nozzles simultaneously.
16 +Vs
Q2
D1
Q6
Q7
Q4
R5
Q8
5
6
D2
R7
Q11
Q14
-IN 34
Q15A
R10
Q16
IC1
Q19
R17
Q23
C3
R19
Q20
Q24
1
TP
2
3
BACK GND
PLT
OUT
4
5
6
7
8
9
10
+VB
CC1
CC2
NC
+VB
NC
NC
NC
21 OUT
-IN
+IN
GND
NC
-VB
VIEW FROM COMPONENT SIDE
NC
NC +ILIM -ILIM
NC -VB
22 OUT
34
33
32
31
30
29
Q22
28
27
26
25
24
23
11
22
OUT OUT
12
21
13
20
14
15
16
+VS
+VS
+VS
-VS
-VS
-VS
19
18
17
OUT OUT OUT
C7
RLIM
C8
Q21
R20
17 -Vs
-Vb 30
18 -Vs
-Vb 25
19 -Vs
http://www.cirrus.com
C6
CC
20 OUT
Q18
+IN 33
GND 32
C5
27 -Ilim
R12
C1
+
C2
12 OUT
28 +Ilim
R8
Q15B
R11
EXTERNAL CONNECTIONS
13 OUT
Q12 Q13
R9
Q3
11 OUT
Q9
R15
MP108U
INKJET NOZZLE DRIVE
14 +Vs
Q17
Q1B
Q1A
C5
SUBSTRATE
BACKPLATE
Cc1
RLIM
OUT
CC1
+ILIM
+
NOTES:
CC IS NPO (COG) RATED FOR FULL SUPPLY VOLTAGE +VS TO -VS
BOTH PINS 3 AND 32 REQUIRED CONNECTED TO SIGNAL GROUND
C2 AND C3 ELECTROLYTIC 10µF PER AMP OUTPUT CURRENT
C1,C4,C5-8 HIGH QUALITY CERAMIC 0.1µF
ALL OUTPUT PINS MUST BE TIED TOGETHER
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
C3
C4
LOAD &
FEEDBACK
CC
100pF
33pF
10pF
CC
470pF
220pF
33pF
PHASE COMPENSATION
GAIN W/O BOOST
TYP. SLEW RATE
1
55 V/µS
4
135 V/µS
10
170 V/µS
TYP. SLEW RATE
GAIN W BOOST
12 V/µS
1
35 V/µS
3
135 V/µS
10
MAY 20091
APEX − MP108UREVD
MP108 • MP108A
P r o d u c t I n n o v a t i o nF r o m
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +VS to -VS
SUPPLY VOLTAGE, +VB
SUPPLY VOLTAGE, -VB
OUTPUT CURRENT, peak
POWER DISSIPATION, internal, DC
INPUT VOLTAGE
TEMPERATURE, pin solder, 10s
TEMPERATURE, junction2
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE, case
200V
+VS + 15V6
-VS – 15V6
12A, within SOA
100W
+VB to -VB
225°C.
150°C.
-40 to 105°C.
-40 to 85°C.
SPECIFICATIONS
PARAMETER
INPUT
OFFSET VOLTAGE
OFFSET VOLTAGE vs. temperature
OFFSET VOLTAGE vs. supply
BIAS CURRENT, initial3
BIAS CURRENT vs. supply
OFFSET CURRENT, initial
INPUT RESISTANCE, DC
INPUT CAPACITANCE
COMMON MODE VOLTAGE RANGE
COMMON MODE VOLTAGE RANGE
COMMON MODE REJECTION, DC
NOISE
TEST CONDITIONS1
1011
4
1MHz bandwidth, 1kΩ RS
92
96
45
10
10
IO = 10A
IO = -10A
IO = 10A, +VB = +VS +10V
IO = -10A, -VB = -VS -10V
+VS - 10 +VS - 8.6
-VS + 10 -VS + 7
+VS - 1.6
-VS + 5.1
10
CC = 10pF
150
170
2V Step
1
No load, DC
5
CC = 10pF, +VS = 100V, -VS = -100V
300
POWER SUPPLY
VOLTAGE
CURRENT, quiescent
THERMAL
RESISTANCE, AC, junction to case5
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
MP108
TYP
1
20
Full temperature range
GAIN
OPEN LOOP @ 15Hz
RL = 10KΩ, CC = 10pF
GAIN BANDWIDTH PRODUCT @ 1MHz CC = 10pF
PHASE MARGIN
Full temperature range
OUTPUT
VOLTAGE SWING
VOLTAGE SWING
VOLTAGE SWING
VOLTAGE SWING
CURRENT, continuous, DC
SLEW RATE, AV = -20
SETTLING TIME, to 0.1%
RESISTANCE
POWER BANDWIDTH 180VP-P
MIN
±15
Full temperature range, f ≤ 60Hz
Full temperature range, f < 60Hz
Full temperature range
-40
±75
50
MP108A
MAX
MIN TYP MAX UNITS
5
*
3
50
*
*
20
*
100
70
0.1
*
50
30
*
*
+VB - 15
*
-VB + 15
*
*
*
mV
µV/°C
µV/V
pA
pA/V
pA
Ω
pF
V
V
dB
µV RMS
*
*
*
dB
MHz
degrees
*
*
*
*
*
*
11
*
*
*
*
*
V
V
V
V
A
V/µS
µS
Ω
kHz
±100
*
65
*
*
*
*
V
mA
1
1.25
13
85
*
*
*
*
*
°C/W
°C/W
°C/W
°C
NOTES: 1. Unless otherwise noted: TC=25°C, compensation CC=100pF, DC input specifications are value given, power supply voltage is typical rating.
2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTBF.
3. Doubles for every 10°C of case temperature increase.
4. +VS and -VS denote the positive and negative supply voltages to the output stage. +VB and -VB denote the positive and negative supply voltages to the input stages.
5. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
6. Power supply voltages +VB and -VB must not be less than +VS and -VS respectively.
2
MP108U
MP108 • MP108A
POWER DERATING
2
PHASE, Ф (°)
PO
0.01 P = 10W
O
NORMALIZED CURRENT LIMIT, (%)
0.001
30
MP108U
P
0W
=
10
O
100
1K
10K 30K
FREQUENCY, F (Hz)
OUTPUT VOLTAGE, VO (VP-P)
115
20
OUTPUT VOLTAGE SWING
8
7
6
5
4
3
2
1
0
0
W/O BOOST
FROM +V S
M -V S
T FRO
OOS
W/O B
TC = 25°C
50mS PULSE
OM
R
TF
-V S
OS
O
HB
T
WI
ROM +V S
OOST F
WITH B
2
4
6
8
10
OUTPUT CURRENT, IO (A)
5M
QUIESCENT CURRENT vs. TEMPERATURE
NORMALIZED QUIESCENT CURRENT, IO (%)
0W
20
=
NORMALIZED QUIESCENT CURRENT, IO (%)
AV = 20
CC = 10pF
VS = 52V
RL = 4Ω
9
40
0
40
80
120 160 200
TOTAL SUPPLY VOLTAGE, VS (V)
100K
1M
FREQUENCY, F (Hz)
110
105
100
95
90
-40 -20 0 20 40 60 80 100
CASE TEMPERATURE, (°C)
10
1
SAFE OPERATING AREA
C
5° C
=2 5°
T C =2
S, , T C 5°C
m
=2 5°C
10 0mS
C
, T =8
10
DC , T C
DC
DISTORTION, THD (%)
HARMONIC DISTORTION
TC = -40°C
60
pF
-25
0
25 50 75 100
CASE TEMPERATURE, TC (°C)
TC = 25°C
100
80
80
F
90
TC = 85°C
C C=
100
100
F
110
QUIESCENT CURRENT vs. SUPPLY
120
20
10K
100 1K 10K 100K 1M 10M
FREQUENCY, F (Hz)
10p
120
RL = 4Ω
IO = 1A DC
20
pF
CURRENT LIMIT
40
0
10
10 100 1K 10K 100K 1M 10M
FREQUENCY, F (Hz)
130
60
100
220
0
1
CC = 100pF
pF
20
CC = 33pF
80
C C=
RL = 4Ω
IO = 1A
CC = 10pF
10M
POWER RESPONSE
200
120
1
1M
FREQUENCY, F (Hz)
470
40
180
300K
5M
SMALL SIGNAL RESPONSE W/O BOOST
100
150
C C=
CC = 470pF
60
1M
FREQUENCY, F (Hz)
2
1 CC = 10pF
2 CC = 33pF
3 CC = 100pF
RL = 4Ω
IO = 1A
33p
CC = 220pF
80
1
120
C C=
CC = 33pF
100
0.1
1 CC = 10pF
2 CC = 33pF
3 CC = 100pF
RL = 4Ω
IO = 1A
1
C C=
OPEN LOOP GAIN, A (dB)
120
OPEN LOOP GAIN, A (dB)
SMALL SIGNAL RESPONSE W/ BOOST
1
2
150
210
100K
0
-40 -20 0 20 40 60 80 100
CASE TEMPERATURE, TC (°C)
70
-50
1
180
20
2
3
120
40
90
3
PHASE, Ф (°)
80
60
PHASE RESPONSE W/O BOOST
PHASE RESPONSE W/ BOOST
90
OUTPUT CURRENT FROM +VS OR -VS (A)
100
VOLTAGE DROP FROM SUPPLY, (V)
INTERNAL POWER DISSIPATION, P(W)
P r o d u c t I n n o v a t i o nF r o m
0.2
1
10
100 200
SUPPLY TO OUTPUT DIFFERENTIAL, VS-VO (V)
3
MP108 • MP108A
P r o d u c t I n n o v a t i o nF r o m
GENERAL
Please read Application Note 1 "General Operating Considerations" which covers stability, power supplies, heat sinking,
mounting, current limit, 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 complete Application Notes library, Technical Seminar
Workbook and Evaluation Kits.
GROUND PINS
The MP108 has two ground pins (pins 3, 32). These pins
provide a return for the internal capacitive bypassing of the
small signal portions of the MP108. The two ground pins are
not connected together on the substrate. Both of these pins
are required to be connected to the system signal ground.
SAFE OPERATING AREA
parasitic oscillation in the output stage of the MP108. Use
electrolytic capacitors at least 10µF per output amp required.
Bypass the electrolytic capacitors with high quality ceramic
capacitors (X7R) 0.1µF or greater. In most applications power
supply terminals +VB and -VB will be connected to +VS and
-VS respectively. Supply voltages +VB and -VB are bypassed
internally but both ground pins 3 and 32 must be connected to
the system signal ground to be effective. In all cases power to
the buffer amplifier stage of the MP108 at pins 8 and 25 must
be connected to +VB and -VB at pins 4 and 30 respectively.
Provide local bypass capacitors at pins 8 and 25. See the
external connections diagram on page 1.
+Vs
Z1
RF
+Vs
-IN
34
3
GND
+Vb
RIN
34
The MOSFET output stage of the MP108 is not limited by
second breakdown considerations as in bipolar output stages.
Only thermal considerations and current handling capabilities
limit the SOA (see Safe Operating Area graph on previous page).
The output stage is protected against transient flyback by the
parasitic body diodes of the output stage MOSFET structure.
However, for protection against sustained high energy flyback
external fast-recovery diodes must be used.
FIGURE 1
OVERVOLTAGE PROTECTION
COMPENSATION
CURRENT LIMIT
The external compensation capacitor CC is connected
between pins 5 and 6. Unity gain stability can be achieved with
any capacitor value larger than 100pF for a minimum phase
margin of 45 degrees. At higher gains more phase shift can
usually be tolerated in most designs and the compensation
capacitor value can be reduced resulting in higher bandwidth
and slew rate. Use the typical operating curves as a guide to
select CC for the application. An NPO (COG) type capacitor is
required rated for the full supply voltage (200V).
The two current limit sense lines are to be connected directly
across the current limit sense resistor. For the current limit to
work correctly pin 28 must be connected to the amplifier output
side and pin 27 connected to the load side of the current limit
resistor RLIM as shown in Figure 2. This connection will bypass
any parasitic resistances RP, formed by socket and solder joints
as well as internal amplifier losses. The current limiting resistor
may not be placed anywhere in the output circuit except where
shown in Figure 2. The value of the current limit resistor can
be calculated as follows: RLIM = .65/ILIMIT
OVERVOLTAGE PROTECTION
Although the MP108 can withstand differential input voltages
up to ±25V, additional external protection is recommended. In
most applications 1N4148 signal diodes connected anti-parallel
across the input pins is sufficient. In more demanding applications where bias current is important diode connected JFETs
such as 2N4416 will be required. See Q1 and Q2 in Figure 1.
In either case the differential input voltage will be clamped to
±0.7V. This is usually sufficient overdrive to produce the maximum power bandwidth. Some applications will also need over
voltage protection devices connected to the power supply rails.
Unidirectional zener diode transient suppressors are recommended. The zeners clamp transients to voltages within the
power supply rating and also clamp power supply reversals to
ground. Whether the zeners are used or not the system power
supply should be evaluated for transient performance including
power-on overshoot and power-off polarity reversals as well as
line regulation. See Z1 and Z2 in Figure 1.
POWER SUPPLY BYPASSING
Bypass capacitors to power supply terminals +VS and -VS
must be connected physically close to the pins to prevent local
4
Q2
OUT
IN
Q1
33
GND
+IN
-Vb
32
-Vs
-Vs
33
27
ILIM28
ILIM+
RP
OUT
11-13
20-22
RLIM
RL
Z2
FIGURE 2
4 WIRE CURRENT LIMIT
BOOST OPERATION
With the boost feature the small signal stages of the amplifier
are operated at a higher supply voltages than the amplifierís
high current output stage. +VB (pins 4,8) and -VB (pins 25,30)
are connected to the small signal stages and +VS (pins 14-16)
and -VS (pins 17-19) are connected to the high current output
stage. An additional 10V on the +VB and -VB pins is sufficient
to allow the small signal stages to drive the output stage into
the triode region and improve the output voltage swing for extra
efficient operation when required. When the boost feature is
not needed +VS and -VS are connected to the +VB and -VB
pins respectively. The +VB and -VB pins must not be operated
at supply voltages less than +VS and -VS respectively.
BACKPLATE GROUNDING
The substrate of the MP108 is an insulated metal substrate.
It is required that it be connected to signal ground. Connect pin
2 (back plate) to signal ground. The back plate will then be AC
grounded to signal ground through a 1µF capacitor.
MP108U
P r o d u c t I n n o v a t i o nF r o m
MP108 • MP108A
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 [email protected]
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
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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
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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 PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE
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MP108U
5