MP39, MP39A
MP39 • MP39A
MP39 • MP39A
While the cost is low the MP39 offers many of the
same features and performance specifications found
in much more expensive hybrid power amplifiers.
The metal substrate allows the MP39 to dissipate
power up to 125 watts and its power supply voltages
can range up to +/- 50 Volts (100V total). Optional
boost voltage inputs allow the small signal portion
of the amplifier to operate at higher supply voltages
than the high current output stage. The amplifier is
then biased to achieve close linear swings to the
supply rails at high current for extra efficient opera-
tion. External compensation tailors performance to
the user needs. A four-wire sense technique allows
current limiting without the need to consider internal
or external mili-ohm parasitic resistance in the out-
put line. An Iq pin is available which can be used to
shut off the quiescent current in the output stage.
The output stage then operates class C and lowers
quiescent power dissipation. This is useful in appli-
cations where output crossover distortion is not im-
portant.
Power Operational Amplifier
FEATURES
•
•
•
•
•
•
•
•
•
•
HIGH INTERNAL DISSIPATION — 125 Watts
HIGH VOLTAGE, HIGH CURRENT — 100V, 10A
HIGH SLEW RATE — 10V/µs
4 WIRE CURRENT LIMIT SENSING
OPTIONAL BOOST VOLTAGE INPUTS
LINEAR AND ROTARY MOTOR DRIVES
YOKE/MAGNETIC FIELD EXCITATION
PROGRAMMABLE POWER SUPPLIES TO ±45V
INDUSTRIAL AUDIO
PACKAGE OPTION - DIP10 - DUAL-IN-LINE
APPLICATIONS
DESCRIPTION
The MP39 is a cost-effective high voltage MOSFET power
operational amplifier constructed with surface mount com-
ponents on a thermally conductive but electrically isolated
substrate.
EQUIVALENT SCHEMATIC
+Vb
1
C1
GND
2
R1
Q1A
Q5
D1
Cc2
4
Cc1
6
Q6
-IN
30
R5
Q10A
R10
Q11
R11
Q13
R12
Q14
R13
Q12
18
-Vs
19
-Vs
20
-Vs
12
+Vs
R2
Q1B
R3
Q3
C2
13
+Vs
14
+Vs
R4
Q9
Q7
Q10B
R6
R7
R8
R9
Q8
Q4
24
+Ilim
23
-Ilim
15
OUT
16
OUT
17
OUT
+IN
29
Iq
25
GND
28
C3
-Vb
26
MP39U
www.cirrus.com
Copyright © Cirrus Logic, Inc. 2012
(All Rights Reserved)
JAN 2012
1
APEX − MP39UREVI
MP39 • MP39A
ABSOLUTE MAXIMUM RATINGS
Parameter
SUPPLY VOLTAGE, +V
S
to –V
S
BOOST VOLTAGE
OUTPUT CURRENT, within SOA
POWER DISSIPATION, internal
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder - 10s
TEMPERATURE, junction
TEMPERATURE, storage
OPERATING TEMPERATURE RANGE, case
(Note 2)
-40
-40
-20
-V
B
Symbol
Min
Max
100
±V
S
±20
25
125
+20
+V
B
200
175
+105
+85
Units
V
V
A
W
V
V
°C
°C
°C
°C
SPECIFICATIONS
Parameter
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE,
vs. temperature
OFFSET VOLTAGE,
vs. supply
OFFSET VOLTAGE,
vs. power
BIAS CURRENT, initial
BIAS CURRENT,
vs. supply
OFFSET CURRENT, initial
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
COMMON MODE
VOLTAGE RANGE
COMMON MODE
REJECTION, DC
INPUT NOISE
GAIN
OPEN LOOP, @ 15Hz
Full temp range,
C
C
= 100pF
R
L
=10Ω, V
O
= 90V
P-P
C
C
= 100pF
Full temp range
94
113
2
40
60
*
*
*
*
*
dB
MHz
kHz
°
Full temp range
Full temp, range,
V
CM
= ±20V
100kHz BW, R
S
= 1KΩ
±V
B
¯ 15
+
86
Full temp range
Full temp range
5
50
15
30
10
.01
10
10
10
20
±V
B
¯ 12
+
98
10
*
*
50
200
10
*
*
*
*
*
*
*
*
*
*
*
*
30
100
3
mV
µV/°C
µV/V
µV/W
pA
pA/V
pA
Ω
pF
V
dB
µVrms
Test Conditions
(Note 1)
MP38
Min
Typ
Max
Min
MP38A
Typ
Max
Units
GAIN BANDWIDTH PRODUCT I
O
= 10A
POWER BANDWIDTH
PHASE MARGIN
2
MP39U
MP39 • MP39A
Parameter
OUTPUT
VOLTAGE SWING
VOLTAGE SWING
SETTLING TIME to .1%
SLEW RATE
CAPACITIVE LOAD
RESISTANCE
CURRENT, CONTINUOUS
POWER SUPPLY
VOLTAGE
CURRENT, quiescent,
boost supply
CURRENT, quiescent, total
THERMAL
RESISTANCE, AC,
junction to case
RESISTANCE, DC,
junction to case
RESISTANCE,
junction to air
(Note 4)
(Note 3)
Test Conditions
(Note 1)
I
O
=10A
±V
B
= ±V
S
±10V,
I
O
=10A
A
V
=+1,10V step,
R
L
=4Ω
A
V
= –10, C
C
= 100pF
Full temp range,
A
V
=+1
MP38
Min
Typ
Max
Min
*
*
MP38A
Typ
*
*
*
*
*
Max
Units
V
V
µS
V/µS
nF
±V
S
¯ 8.8 ±V
S
¯ 6.0
+
+
±V
S
¯ 6.8 ±V
S
¯ 1.1
+
+
2.5
10
10
4
10
*
11
*
*
*
*
*
Ω
A
V
mA
mA
Full temp range
±15
±40
±50
22
26
Full temp range,
F>60Hz
Full temp range,
F<60Hz
Full temp range
Meets full range
specification
-40
12
.9
1.2
*
+85
*
*
*
°C/W
°C/W
°C/W
TEMPERATURE RANGE, case
*
°C
NOTES: * The specification of MP39A is identical to the specification for MP39 in applicable column to the left.
1. Unless otherwise noted: T
C
= 25°C, R
C
= 100Ω, C
C
= 470pF. DC input specifications are ± value
given. Power supply voltage is typical rating. ±V
B
= ±V
S
.
2. Long term operation at the maximum junction temperature will result in reduced product life. Derate
internal power dissipation to achieve high MTTF. For guidance, refer to the heatsink data sheet.
3. Rating applies if the output current alternates between both output transistors at a rate faster than 60
Hz.
4. The MP39 must be used with a heat sink or the quiescent power may drive the unit to junction tem-
peratures higher than 175°C.
CAUTION
The MP39 is constructed from MOSFET transistors. ESD handling procedures must be observed.
MP39U
3
MP39 • MP39A
EXTERNAL CONNECTIONS
*
GND
+Vb
NC
Cc
Rc
*
+Vs
+Vs
NC
+Vs
NC
NC
8
Cc2
Cc1
NC
1
2
3
NC
4
5
6
7
NC
9
10
11 12 13 14
COMPONENT SIDE VIEW
30 29 28
27 26 25 24 23 22 21
20
19 18 17 16 15
GND
OUT
+Ilim
-Vb
OUT
OUT
-llim
+IN
NC
-Vs
-Vs
-IN
-Vs
NC
NC
Iq
*
*
R
F
+50V
1
+V
B
30
-IN
12-14
+V
S
23
30-pin DIP
PACKAGE STYLE CL
* SEE "BYPASSING" PARAGRAPH
Phase Compensation
Gain
Cc
Rc
1
470pF
100Ω
≥3
220pF
Short
≥ 10
100pF
Short
TYPICAL APPLICATION
Ref: Application Note 25
ULTRA-
SONIC
DRIVE
R
I
MP39
+IN
29
-V
B
-V
S
18-20
The high power bandwidth and high voltage output
of the MP39 allows driving ultra-sonic transducers
via a resonant circuit including the transducer and a
matching transformer. The load circuit appears re-
sistive to the MP39.
26
24
+I
LIM
OUT
15-17
C
C
2
C
C
1
4
I
Q
6
25
R
C
C
C
NC
-I
LIM
-50V
R
CL
ULTRA-SONIC AMPLIFIER
TUNED
TRANSFORMER
GENERAL
Please read Application Note 1 "General Operating Considerations" which covers stability, 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 selec-
tion; Apex Precision Power’s complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits.
CURRENT LIMIT
The two current limit sense lines are to be connected di-
rectly across the current limit sense resistor.
For the cur-
rent limit to work correctly pin 24 must be connected
to the amplifier output side and pin 23 connected to the
load side of the current limit resistor, R
CL
, as shown in
Figure 1.
This connection will bypass any parasitic resis-
tances, Rp, formed by sockets 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 1.
The value of the current limit resistor can be calculated as
follows:
R
CL
=
I
LIMIT
R
F
R
I
INPUT
30
23
24
15–17
R
P
R
CL
R
L
29
MP39
FIGURE 1. CURRENT LIMIT
.7
4
MP39U
MP39 • MP39A
TYPICAL PERFORMANCE GRAPHS
INTERNAL POWER DISSIPATION, P(W)
140
120
100
80
60
40
20
0
0
20
40
60
80
100
CASE TEMPERATURE, TC (°C)
POWER DERATING
% DISTRIBUTION + NOISE
100
10
1
0.1
HARMONIC DISTORTION
A
V
= 10
V
S
= +/-36
R
LOAD
= 8Ω
50mW
100
OUTPUT CURRENT, I
O
(A)
SOA
10mS
1mS
10
125°C
1
85°C
25°C
50W
0.01
0.001
100
1K
10K
FREQUENCY, F (Hz)
100K
1
100
10
SUPPLY to OUTPUT DIFFERENTIAL, V
S
-V
O
(V)
100
OUTPUT VOLTAGE, V
O
(V
PP
)
0.1
140
OPEN LOOP GAIN, AOL (dB)
120
SMALL SIGNAL RESPONSE
0
-30
PHASE RESPONSE
POWER RESPONSE
PHASE (DEGREES)
100
80
60
40
20
0
-20
-40
1
10
100 1K 10K 100K 1M 10M
FREQUENCY, F (Hz)
470pF
220pF
100pF
220pF
-60
-90
-120
-150
-180
-210
1
10
100 1K 10K 100K 1M 10M
FREQUENCY, F (Hz)
100pF
470pF
470pF
10
220pF
100pF
1
1
10
100
FREQUENCY (kHz)
1000
50
40
SLEW RATE (V/μF)
OUTPUT VOLTAGE DROP FROM SUPPLY, V
S
-V
O
(V)
SLEW RATE VS. COMP.
9
8
7
6
5
4
3
2
1
0
0
OUTPUT VOLTAGE SWING
10Ω LOAD
30
20
10
0
100
200
300
400
500
EXT. COMPENSATION CAPACITOR (pF)
+V
B
= +V
S
-V
S
= -V
B
0V
-1
-V
B
=-
V
S
+V
B
V
=+
S
+1
0V
2
4
8
6
OUTPUT CURRENT, I
O
(A)
10
BOOST OPERATION
With the V
B
feature the small signal stages of the amplifier are operated at higher supply voltages than the ampli-
fier's high current output stage. +V
S
(pins 12-14) and –V
S
(pins 18-20) are connected to the high current output
stage. An additional 10V on the V
B
pins is sufficient to allow the small signal stages to drive the output transistors
into saturation and improve the output voltage swing for extra efficient operation when required. When close swing
to the supply rails is not required the +V
B
and +V
S
pins must be strapped together as well as the –V
B
and –V
S
pins.
The boost voltage pins must not be at a voltage lower than the V
S
pins.
MP39U
5
Microchip MCU
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