TPA02/ TPA02A
Power Operational Amplifier
THALER CORPORATION • 2015 N. FORBES BOULEVARD • TUCSON, AZ. 85745 • (520) 882-4000
FEATURES
· COMMON COLLECTOR OUTPUT STAGE
· CLOSE TO RAIL OUTPUT – ±1.2V TO RAIL
· HIGH SLEW RATE – 20V/µsec.
· FAST SETTLING TIME – 600ns
· HIGH POWER BANDWIDTH – 350kHz
· HIGH OUTPUT CURRENT - ±5A PEAK
· LOW CROSSOVER DISTORTION – CLASS A/B
· LOW INPUT CURRENT – FET INPUT
EQUIVALENT
SCHEMATIC
DESCRIPTION
The TPA02 and TPA02A are fast, high output
current operational amplifiers designed to drive
resistive or reactive loads. The common collector
output stage swings close to the supply rails and
is protected against inductive kickback by diodes
to the rails. The safe operating area (SOA) can
be selected by external current limiting resistors.
The output stage is biased for class A/B operation
to achieve low distortion. The amplifiers are
internally compensated but are not suitable for
use as unity gain followers.
EXTERNAL CONNECTIONS AND PIN
CONFIGURATIONS
R
CL+
OUT
OUT
4
-IN
5
6
7
POWER DELIVERY EFFICIENCY AND LOW DISTORTION
Due to the common collector output stage, these
amplifiers can deliver power with high efficiency
particularly for low voltage applications. In the
example application below the TPA02 delivers
power with high efficiency and due to the high
power bandwidth also low distortion.
+V
s
3
2
CL+
1
TOP VIEW
8
CL-
R
CL-
TPA02/02A Rev. A Sept. 2006
+IN
-V
s
TPA02/TPA02A
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
Output Current, within SOA
Power Dissipation, internal
1
Input Voltage, differential
Input Voltage, common mode
38V
5A
48W
±V
S
-5V
±V
S
-2V
Temperature, pin solder – 10s
Temperature, junction
1
Temperature range, storage
Operating temperature range, case
300°C
150°C
-65 to +150°C
-55 to +125°C
SPECIFICATIONS
PARAMETER
INPUT
Offset Voltage, initial
Offset Voltage, vs. temp.
Offset Voltage, vs. supply
Offset Voltage, vs. power
Bias Current, initial
Bias Current, vs. temp.
Bias Current, vs. supply
Offset Current, initial
Offset Current, vs. temp.
Input Impedance, DC
Input Capacitance
Common Mode Volt. Range
5
, Pos
Common Mode Volt. Range
5
, Neg
Common Mode Rejection, DC
GAIN
Open Loop Gain at 10Hz
Open Loop Gain at 10Hz
Gain Bandwidth Product (1MHz)
Power Bandwidth
Phase Margin
OUTPUT
Voltage Swing
3
Voltage Swing
3
Current, peak
Settling Time to .1%,
Slew Rate
Capacitive Load
Harmonic Distortion
Small Signal, rise/fall time
Small Signal, overshoot
POWER SUPPLY
Voltage
Current, quiescent
THERMAL
Resistance, AC junction to case
4
Resistance, DC junction to case
Resistance, junction to air
Temperature Range, case
CONDITIONS
2,6
MIN
TPA02
TYP
MAX
MIN
TPA02A
TYP
MAX
UNIT
S
mV
µV/°C
µV/V
µV/W
pA
pA/°C
pA/V
pA
pa/°C
GΩ
pF
V
V
db
db
db
MHz
kHz
o
V
V
A
µs
V/µs
%
ns
%
*
*
*
*
+125
V
mA
°C/W
°C/W
°C/W
°C
T
c
= 25°C
full temperature range
T
c
= 25°C
T
c
= 25°C
T
c
= 25°C
T
c
= 85°C
T
c
= 25°C
T
c
= 25°C
T
c
= 85°C
T
c
= 25°C
T
c
= 25°C
full temperature range
full temperature range
full temperature range
T
c
= 25°C, 1kΩ load
Full temp range, 10kΩ load
T
c
= 25°C, 10Ω load
T
c
= 25°C, 10Ω load
Full temp range, 10Ω load
T
c
= 25°C,I
o
= 5A, R
CL
= .08Ω
full temp range, I
o
= 2A
T
c
= 25°C
T
c
= 25°C, 2V step
T
c
= 25°C
full temp range, Av > 10
Po = .5W, F = 1kHz, R
L
=10Ω
R
L
= 10Ω, A
v
= 1
R
L
= 10Ω, A
v
= 1
full temp range
T
c
= 25°C
F > 60Hz
F > 60Hz
Meets full range specs
±5
±10
±10
±6
50
.01
25
1000
3
+V
s
-3
+V
s
+5
100
103
100
4.5
350
30
±Vs-3
±Vs-1.2
±10
±50
200
200
100
100
±1
*
*
*
25
*
15
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
-55
±3
±25
100
*
50
*
+V
s
-6
-V
s
+6
70
*
*
*
86
*
±V
s
-4
±V
s
-2
5
13
*
*
*
*
.6
20
SOA
.004
100
10
± 15
27
1.9
2.4
30
± 19
40
2.1
2.6
+85
±7
*
-25
Notes:
*Same as previous Model.
1. Long term operation at the maximum junction
temperature will result in reduced product life. Derate
internal power dissipation to achieve high MTTF.
2. The power supply voltage for all specifications is the
typical rating unless otherwise noted as a test
condition.
3. +V
s
and -V
s
denote the positive and negative supply rail
respectively. Total V
s
is measured from +V
s
to -V
s
.
4. Rating applies if the output current alternates between both
output transistors at a rate faster than 60Hz.
5. Exceeding CMV range can cause the output to latch.
6. Full temperature specifications are guaranteed but not
100% tested.
Caution: The internal substrate contains beryllia (BeO). Do not crush, break, machine or subject the substrate to temperatures
in excess of 850C.
TPA02/02A Rev. A Sept. 2006
TYPICAL PERFORMANCE CURVES
POWER DERATING
INTERNAL POWER DISSIPATION (W)
50
NORMALIZED BIAS CURRENT (X)
40
T=T
C
30
20
10
T=T
A
0
0
25
50
75
100
125
CASE TEMPERATURE
o
C
256
64
CURRENT LIMIT (A)
16
4
1
.25
.06
-15
5
25
45
65
85
105
CASE TEMPERATURE
o
C
BIAS CURRENT
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
-25
CURRENT LIMIT
R
CL
= 0.3Ω
R
CL
= 0.62Ω
0
25
50
75
100
125
CASE TEMPERATURE
o
C
SMALL SIGNAL RESPONSE
120
100
OPEN LOOP GAIN (dB)
80
PHASE (
o
)
60
40
20
0
-20
1
10
100
1K
10K 100K 1M 10M
FREQUENCY (Hz)
0
-30
-60
-90
-120
-150
-180
-210
1
PHASE RESPONSE
30
POWER RESPONSE
abs(+V
s
)+abs(-V
s
)=36V
OUTPUT VOLTAGE (V
P-P
)
23
18
13
abs(+V
s
)+abs(-V
s
)=30V
10
7.8
6.0
.1M
10
100
1K
10K 100K 1M 10M
.2M
.3M
.5M
.7M 1M
FREQUENCY (Hz)
FREQUENCY (Hz)
COMMON MODE REJECTION
120
COMMON MODE REJECTION (dB)
100
80
60
40
20
0
.3
PULSE RESPONSE
100
V
IN
= ±2V, t
r
= 50ns
OUTPUT VOLTAGE (V)
.2
.1
0
-.1
-.2
-.3
INPUT NOISE VOLTAGE (nV/√Hz))
70
50
40
30
20
INPUT NOISE
1
10 100
1K
10K 100K 1M 10M
0
.5
1.0
1.5
10
10
100
1K
10K
100K
FREQUENCY (Hz)
TIME (µs)
FREQUENCY (Hz)
HARMONIC DISTORTION
3
1
DISTORTION (%)
0.3
0.1
0.03
0.01
P
o
QUIESCENT CURRENT
1.6
NORMALIZED CURRENT (I
O
)
6
VOLTAGE DROP FROM SUPPLY (V)
5
4
OUTPUT VOLTAGE SWING
Gain = 1
Load = 10Ω
1.4
1.2
1.0
0.8
0.6
0.4
P
o
=
5
W
0m
=
W
.5
3
+V
o
P
o
W
=5
2
1
0
3
6
9
12
15
OUTPUT CURRENT (A)
TPA02/02A Rev. A Sept. 2006
0.003
100
300
1K
3K
10K
30K 100K
FREQUENCY (Hz)
-25
0
25
50
75
o
C
100
125
CASE TEMPERATURE
DISCUSSION OF PERFORMANCE
SAFE OPERATING AREA (SOA)
SOA
5.0
4.0
3.0
T
T
C
C
These simplified limits may be exceed with
further analysis using the operating conditions
for a specific application.
2. The amplifier can handle any EMF generating
or reactive load and short circuits to the supply
rails or shorts to common if the current limits are
set as follows at Tc = 85°C.
Short to ±V
S
C,L or EMF Load
0.5A
0.7A
1.6A
Short to
Common
1.7A
2.8A
4.2A
T
OUTPUT CURRENT FROM +V
s
OR -V
s
(A)
C
=
=7
25
o
C
2.0
1.5
1.0
0.7
0.5
0.3
0.2
2
3
5
T
C
=1
0
o
C
00
o
C
BR SE
t = 5
m
EA CO
s
KD N
O D
W
N
E
ST
Y
AD
=
12
5
o
C
A
ST
TE
TH
ER
MA
L
±V
s
18V
15V
10V
25 30
40
7
10
15
20
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE (V)
CURRENT LIMIT
Proper operation requires the use of two current
limit resistors, connected as shown in the
external connections diagram. The minimum
value for R
CL
is 0.12 ohm, however for optimum
reliability it should be set as high as possible.
The SOA curves combine the effect of all limits for
this Power Op Amp. For a given application, the
direction and magnitude of the output current
should be calculated or measured and checked
against the SOA curves. This is simple for resistive
loads but more complex for reactive and EMF
generating loads. The following guidelines may
save extensive analytical efforts:
1) Under transient conditions, capacitive and
dynamic* loads up to the following maximums are
safe:
Capacitive Load
I
LIM
= 2A
I
LIM
= 5A
2mF
10mF
25mF
0.7mF
2.2mF
10mF
Inductive Load
I
LIM
= 2A
I
LIM
= 5A
0.2H
0.7H
5H
10mH
25mH
50mH
DEVICE MOUNTING
The case (mounting flange) is electrically
isolated and should be mounted directly to a
heatsink with thermal compound. Screws with
Belville spring washers are recommended to
maintain positive clamping pressure on heatsink
mounting surfaces. Long periods of thermal
cycling can loosen mounting screws and
increase thermal resistance.
Since the case is electrically isolated (floating)
with respect to the internal circuits, it is
recommended to connect it to common or other
convenient AC ground potential.
±V
s
18V
15V
10V
•If the inductive load is driven near steady state
conditions, allowing the output voltage to drop
more than 8V below the supply rail with I
LIM
= 5A,
or 17V below the supply rail with I
LIM
= 2A while the
amplifier is current limiting, the inductor should be
capacitively coupled or the current limit must be
lowered to meet SOA criteria.
TPA02/02A Rev. A Sept. 2006
MECHANICAL
TO3-8 Package
TPA02/02A Rev. A Sept. 2006
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