MP111
MP111U 1
MP111
Power Operational Amplifier
MP111
FEATURES
• LOW COST
• HIGH VOLTAGE - 100 VOLTS
• HIGH OUTPUT CURRENT- 50 AMP PULSE
OUTPUT, 15 AMP CONTINUOUS
• 170 WATT DISSIPATION CAPABILITY
• 130 V/µS SLEW RATE
• 500kHz POWER BANDWIDTH
APPLICATIONS
• INKJET PRINTER HEAD DRIVE
• PIEZO TRANSDUCER DRIVE
• INDUSTRIAL INSTRUMENTATION
• REFLECTOMETERS
• ULTRA-SOUND TRANSDUCER DRIVE
R1
R12
R9
R10
Q1A Q1B
Q15A Q15B
R2
R11
R8
Q14
Q24
R20
+Vs
-IN
+IN
-Vs
+Vb
R7
Q2
R3
R19
Q23
-Vb
Q3
Q22
R17
R5
Q12 Q13
Q4
Cc2
Cc1
C1
C3
GND
GND
R15
Q17
IC1
+Ilim
-Ilim
D2
Q11
Q16
OUT
-Vb
+Vb
C5
SUBSTRATE
BACKPLATE
+Vs
+Vs
-Vs
-Vs
OUT
OUT
OUT
OUT
OUT
BACK
PLATE
TP D1
Q8
Q7
Q9
Q6
Q20
Q19
Q21
Q18
8
4
3
2
1
34
5
6
25
33
32
30
11
14
15
16
27
12
13
28
20
21
22
17
18
19
DESCRIPTION
The MP111 operational amplier is a surface mount
constructed component that provides a cost-effective
solution in many industrial applications. The MP111
offers outstanding performance that rivals much more
expensive hybrid components yet has a footprint of
only 4 sq in. The MP111 has many optional features
such as four-wire current limit sensing and external
compensation. The 500 kHz power bandwidth and 15
amp continuous and 50A pulse output of the MP111
makes it a good choice for piezo transducer drive ap-
plications. The MP111 is built on a thermally conduc-
tive but electrically insulating substrate that can be
mounted to a heat sink.
EQUIVALENTCIRCUITDIAGRAM
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
www.apexanalog.com SEP2012
MP111UREVF
MP111
2 MP111U
ABSOLUTEMAXIMUMRATINGS
SPECIFICATIONS
Parameter Symbol Min Max Units
SUPPLY VOLTAGE, +VS to -VS100 V
SUPPLY VOLTAGE, +VB (Note 6) +VS, +15 V
SUPPLY VOLTAGE, -VB (Note 6) -VS, -15 V
OUTPUT CURRENT, peak, within SOA 50 A
POWER DISSIPATION, internal, DC 170 W
INPUT VOLTAGE +VB to -VBV
DIFFERENTIAL INPUT VOLTAGE -25 +25 V
TEMPERATURE, pin solder, 10s 225 °C
TEMPERATURE, junction (Note 2) 175 °C
TEMPERATURE, storage -40 +105 °C
OPERATING TEMPERATURE RANGE, case -40 +85 °C
Parameter
TestConditions
(Note 1) Min Typ Max Units
INPUT
OFFSET VOLTAGE 1 5 mV
OFFSET VOLTAGE, vs. temperature Full temp range 50 µV/°C
OFFSET VOLTAGE, vs. supply 20 µV/V
BIAS CURRENT, initial (Note 3) 100 pA
BIAS CURRENT, vs. supply 0.1 pA/V
OFFSET CURRENT, initial 50 pA
INPUT RESISTANCE, DC 1011 Ω
INPUT CAPACITANCE 4 pF
COMMON MODE
VOLTAGE RANGE
+VB - 15
V
COMMON MODE
VOLTAGE RANGE
-VB + 15
V
COMMON MODE
REJECTION, DC 92 dB
NOISE 1MHz BW, RS = 1KΩ 10
µV RMS
GAIN
OPEN LOOP, @ 15Hz RL = 10KΩ, CC = 33pF 96 dB
GAIN BANDWIDTH PRODUCT @ 1MHz CC = 33pF 6 MHz
PHASE MARGIN Full temp range 45 °
OUTPUT
VOLTAGE SWING I O = 15A +VS - 10 +VS - 8.4 V
VOLTAGE SWING I O = -15A -VS + 10 -VS + 5.8 V
VOLTAGE SWING I O = 15A, +VB = +VS +10V +VS - 0.8 V
VOLTAGE SWING I O = -15A, -VB = -VS -10V -VS + 1.0 V
MP111
MP111U 3
NOTES: * The specication of MP111A is identical to the specication for MP111 in the applicable column to the
left.
1. Unless otherwise noted: TC = 25°C, CC = 100pF. DC input specications are value given. Power sup-
ply 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 MTTF.
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 de-
note 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.
Parameter
TestConditions
(Note 1) Min Typ Max Units
CURRENT, CONTINUOUS, DC 15 A
SLEW RATE, A V = -20 CC= 33pF 100 130 V/µS
SETTLING TIME to 0.1% 2V step 1 µS
RESISTANCE No load, DC 3 Ω
POWER BANDWIDTH 180VP-P
CC = 33pF,
+VS = 50V, -VS = -50V 500 kHz
POWERSUPPLY
VOLTAGE ±15 ±45 ±50 V
CURRENT, quiescent 142 157 mA
THERMAL
RESISTANCE, AC, junction to case
(Note 5) Full temp range, F≥60Hz 0.65 °C/W
RESISTANCE, DC, junction to case Full temp range, F<60Hz 0.88 °C/W
RESISTANCE, junction to air Full temp range 13 °C/W
TEMPERATURE RANGE, case -40 +85 °C
MP111
4 MP111U
30 100 1K 10K 30K
0.001
0.01
0.1
DISTORTION, THD (%)
FREQUENCY, F (Hz)
HARMONIC DISTORTION
AV = 10
CC = 33pF
VS = 50V
RL = 4Ω
P
O
= 150W
PO = 10W
PO = 75W
0 3 6 9 12 15
0
1
2
3
4
5
6
7
VOLTAGE DROP FROM SUPPLY, (V)
OUTPUT VOLTAGE SWING
OUTPUT CURRENT, IO (A)
W/O BOOST FROM +V
S
W/O BOOST FROM -VS
WITH BOOST FROM +VS
WITH BOOST FROM -V
S
TC=25°C
50mS PULSE
8
9
1 10
SUPPLY TO OUTPUT DIFFERENTIAL, V
S
-V
O
(V)
10
100
1
50
OUTPUT CURRENT FROM +V
S
OR -V
S
(A)
SAFE OPERATING AREA
DC, T
C
=85°C
DC, T
C
=25°C
10mS, T
C
=25°C
1mS, TC=25°C
100S, T
C
=25°C
-40 -20 0 20 40
80
90
100
110
120
NORMALIZED QUIESCENT CURRENT, I
Q
(%)
CASE TEMPERATURE TC (°C)
QUIESCENT CURRENT vs. TEMP.
VS
130
VB
TOTAL
60 80 100
20 40 60 80 100
84
88
92
96
100
NORMALIZED QUIESCENT CURRENT, I
Q
(%)
TOTAL SUPPLY VOLTAGE, VS (V)
QUIESCENT CURRENT vs. SUPPLY
TC = 25°C
104
TC = 85°C
TC = -40°C
-50 -25 0 25 50 75 100
70
80
90
100
110
120
130
NORMALIZED CURRENT LIMIT, (%)
CASE TEMPERATURE, TC (°C)
CURRENT LIMIT
10 100 1K 10K
0
20
40
60
80
OPEN LOOP GAIN, A (dB)
SMALL SIGNAL RESPONSE W/ BOOST
FREQUENCY, F (Hz)
100K 1M 10M
100
120
1
2
1
3
10 100 1K 10K
0
20
40
60
80
OPEN LOOP GAIN, A (dB)
SMALL SIGNAL RESPONSE W/O BOOST
FREQUENCY, F (Hz)
100K 1M 10M
100
120
2
3
1
FREQUENCY, F(Hz)
OUTPUT VOLTAGE, VO (VP-P)
100
10
10K 100K 1M 5M
POWER RESPONSE
CC=33pF
CC=68pF
CC=100pF
CC=220pF
CC=470pF
100K 1M 10M
-180
-150
-120
-90
-60
PHASE, Φ (°)
PHASE RESPONSE W/O BOOST
FREQUENCY, F (Hz)
1 CC = 33pF
2 CC = 68pF
3 CC = 100pF
RL = 4Ω
IO = 1A
2
3
1
10K 100K 1M 10M
-180
-150
-120
-90
-60
PHASE, Φ (°)
PHASE RESPONSE W/ BOOST
FREQUENCY, F (Hz)
1
23
-40 -20 0 20 40 60 80 100
0
40
80
120
160
INTERNAL POWER DISSIPATION, P (W)
POWER DERATING
CASE TEMPERATURE, TC (°C)
180
20
60
100
140
1 CC = 33pF
2 CC = 68pF
3 CC = 100pF
RL = 4Ω
IO = 1A
1 CC = 100pF
2 CC = 220pF
3 CC = 470pF
RL = 4Ω
IO = 1A DC
1 CC = 33pF
2 CC = 68pF
3 CC = 100pF
RL = 4Ω
IO = 1A DC
TYPICALPERFORMANCEGRAPHS
MP111
MP111U 5
-IN +IN
+VB
-VB
CC2
GND
GND
1234567 8
31
32 29
30 28 27 26 25
3334
CC1
-ILIM
+ILIM
CC
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.
SEE PACKAGE OUTLINE FD IN THE OUTLINE DIMENSIONS DATASHEET.
VIEW FROM COMPONENT SIDE
PHASE COMPENSATION
GAIN W/O BOOST
≥1
≥4
≥10
CC
100pF
68pF
33pF
RLIM
910 11 12
2224 23 21
+VS
+VS
+VS
OUT
NC
13 14 15 16
17
18
19
20
OUTOUT
-VS
-VS-VS
LOAD &
FEEDBACK
-VB
NC
NC
+VB
TYP. SLEW RATE
55 V/µS
60 V/µS
130 V/µS
OUTOUTOUT
BACK
PLT
TP NC NC NC
NC NC
C5
C6
C7 C8
GAIN W BOOST
≥3
≥6
≥10
CC
470pF
220pF
100pF
TYP. SLEW RATE
12 V/µS
27 V/µS
55 V/µS
+
C1
C2
C4
+C3
34-pinDIP
PACKAGESTYLEFD
EXTERNALCONNECTIONS
TYPICALAPPLICATION
INKJETNOZZLEDRIVE
The MP111's fast slew rate and wide power bandwith
make it an ideal nozzle driver for industrial inkjet print-
ers. The 50 amp pulse output capability can drive hun-
dreds of inkjet nozzles simultaneously.
CC
+VS
-VS
OUT
CC2
CC1
GND
GND
+VB
+VS
-VB
-VS
-ILIM
+ILIM
RLIM
RF
RI
PIEZO
TRANSDUCER
PRINT
NOZZLE
COMMAND
VOLTAGE
MP111
6 MP111U
GENERAL
Please read Application Note 1 "General Operating Considerations" which covers stability, power supplies, heat
sinking, mounting, current limit, SOA interpretation, and specication 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 Microtechnology's complete Application Notes library, Technical Seminar Workbook and Evaluation
Kits.
GROUNDPINS
The MP111 has two ground pins (pins 3, 32). These pins provide a return for the internal capacitive bypassing of
the small signal portions of the MP111. 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
The MOSFET output stage of the MP111 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 yback by the parasitic body diodes of the out-
put stage MOSFET structure. However, for protection against sustained high energy yback external fast-recovery
diodes must be used.
COMPENSATION
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 (100V).
OVERVOLTAGEPROTECTION
Although the MP111 can withstand differential input voltages up to ±25V, addi-
tional external protection is recommended. In most applications 1N4148 signal
diodes connected anti-parallel across the input pins is sufcient. In more de-
manding 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 sufcient
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 pow-
er 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 parasitic oscillation in the output stage of the MP111. 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 amplier stage of the MP111 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 con-
nections diagram on page 1.
34
33
+Vs
-Vs
OUT
3
32
GND
GND
+Vb
+Vs
-Vb
-Vs
Z1
Z2
-IN
+IN
Q1
Q2
FIGURE1.
OVERVOLTAGEPROTECTION
MP111
MP111U 7
CURRENTLIMIT
The two current limit sense lines are to be connected directly across the cur-
rent limit sense resistor. For the current limit to work correctly pin 28 must
be connected to the amplier 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 amplier 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
BOOSTOPERATION
With the boost feature the small signal stages of the amplier are operated at a higher supply voltages than the
amplier's 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 sufcient to allow the small signal stages to drive the output stage into the triode region and
improve the output voltage swing for extra efcient 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 MP111 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.
34
OUT
11-13
20-22
33
ILIM-
ILIM+
27
28 RP
RL
IN
RF
RLIM
RIN
FIGURE2.4WIRECURRENTLIMIT
NEEDTECHNICALHELP?CONTACTAPEXSUPPORT!
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For inquiries via email, please contact apex.support@apexanalog.com.
International customers can also request support by contacting their local Apex Microtechnology Sales Representative.
To nd the one nearest to you, go to www.apexanalog.com
IMPORTANT NOTICE
Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change
without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further
notice to any specications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this informa-
tion, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual
property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the informa-
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APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR
LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDER-
STOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK.
Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks
of their respective holders.
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
www.apexanalog.com SEP2012
MP111UREVF