TPA12A [ETC]
Power Operational Amplifier; 功率运算放大器
| 型号： | TPA12A |
| 厂家： | 
ETC |
| 描述： | Power Operational Amplifier |
| 文件： | 总5页 (文件大小：148K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TPA12/ TPA12A
Power Operational Amplifier
THALER CORPORATION • 2015 N. FORBES BOULEVARD • TUCSON, AZ. 85745 • (520) 882-4000
FEATURES
APPLICATIONS
• HIGH OUTPUT CURRENT - ±15A PEAK
• HIGH VOLTAGE RATING - ±50V
• MOTOR, VALVE AND ACTUATOR CONTROL
• MAGNETIC DEFLECTION CIRCUITS UP TO 10A
• POWER TRANSDUCERS UP TO 100 kHz
• AUDIO AMPLIFIERS UP TO 120W RMS
• LOW THERMAL RESISTANCE – 1.4 oC/W
•CURRENT FOLDOVER PROTECTION
• EXCELLENT LINEARITY - CLASS A/B OUTPUT
EQUIVALENT SCHEMATIC
DESCRIPTION
3
The TPA12 and TPA12A are designed for high
voltage and high current applications. They can
deliver up to 600 Watts of power to a load. The
safe operating area (SOA) at the output stage can
be guaranteed for all operating conditions by
properly selecting the external current limiting
resistor.
D1
2
7
4
5
1
A1
The class A/B output stage delivers power with
remarkably low distortion (see graph page 3). In
order to maintain stable bias current and low
distortion over the operating temperature range a
resistor/thermistor network in the VBE multiplier is
used to closely match the VBE of the output
transistors.
8
6
EXTERNAL CONNECTIONS AND PIN
CONFIGURATIONS
R
CL+
CL+
+V
s
2
3
OUT
1
+IN
-IN
4
OUTPUT
TOP VIEW
5
8
CL-
R
CL-
6
7
F.O.
-V
s
TPA12/12A Rev. B Oct. 2006
TPA12/TPA12A
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
100V
Temperature, pin solder – 10s
Temperature, junction1
Temperature range, storage
300°C
200°C
-65 to +150°C
Output Current, within SOA
Power Dissipation, internal
Input Voltage, differential
Input Voltage, common mode
15A
125W
±VS -3V
±VS
Operating temperature range, case -55 to +125°C
Electrical Specifications
TPA12
TPA12A
CONDITIONS 2,5
PARAMETER
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
INPUT
Offset Voltage, initial
Tc = 25°C
full temperature range
Tc = 25°C
Tc = 25°C
Tc = 25°C
full temperature range
T c= 25°C
T c= 25°C
full temperature range
Tc = 25°C
Tc = 25°C
±2
±10
±30
±20
±12
±50
±10
±12
±50
200
3
±6
±65
±200
±1
*
*
*
10
*
*
±5
*
*
*
±4
±40
*
mV
µV/°C
µV/V
µV/W
nA
pA/°C
pA/V
nA
pA/°C
MΩ
pF
V
db
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
± 30
± 500
20
*
± 30
±20
Offset Current, vs. temp.
Input Impedance, DC
Input Capacitance
Common Mode Volt. Range3
Common Mode Rejection, DC
full temperature range
full temp. range VCM = ±Vs-5
±Vs-5
74
*
*
*
*
± Vs-3
100
GAIN
Open Loop Gain at 10Hz
Open Loop Gain at 10Hz
Gain Bandwidth Product (1MHz)
Power Bandwidth
Tc = 25°C, 1kΩ load
Full temp range, 8Ω load
Tc = 25°C, 8Ω load
T c= 25°C, 8Ω load
Full temp range, 8Ω load
110
108
4
20
20
*
*
*
*
*
db
db
MHz
kHz
o
96
13
*
*
Phase Margin AV = +4
OUTPUT
Voltage Swing3
±Vs-6
±Vs-5
±Vs-5
10
*
*
*
V
V
V
T c=25°C,TPA12 =10A, TPA12A=15A
Voltage Swing3
Voltage Swing
Current, peak
Tc = 25°C, Io = 5A
full temp range, Io = 80mA
Tc = 25°C
3
15
A
Settling Time to .1%,
Slew Rate
Capacitive Load
Capacitive Load
2
4
*
*
µs
V/µs
nF
T c= 25°C, 2V step
Tc = 25°C
full temp range, Av = 4
full temp range, Av >10
2.5
*
*
1.5
SOA
*
*
POWER SUPPLY
Voltage
Current, quiescent
full temp range
Tc = 25°C
±10
±40
25
±45
50
*
*
±50
*
V
mA
THERMAL
Resistance, AC junction to case4
Resistance, DC junction to case
Resistance, junction to air
Temperature Range, case
Tc= -55 to +125°C, F>60Hz
Tc= -55 to +125°C
Tc= -55 to +125°C
0.8
1.25
30
0.9
1.4
*
*
*
*
*
°C/W
°C/W
°C/W
°C
Meets full range specifications
-25
+85
-55
+125
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.
3. +Vs and -Vs denote the positive and negative supply rail
respectively. Total Vs is measured from +Vs to -Vs.
4. Rating applies if the output current alternates between both
output transistors at a rate faster than 60Hz.
2. The power supply voltage for all specifications is
±40V unless otherwise noted as a test condition.
5. Exceeding CMV range can cause the output to latch.
Caution: The internal substrate contains beryllia (BeO). Do not crush, break, machine or subject the substrate to temperatures
in excess of 850C.
TPA12/12A Rev. B Oct. 2006
TYPICAL PERFORMANCE CURVES
POWER DERATING
BIAS CURRENT
CURRENT LIMIT
140
2.5
17.5
120
100
80
2.2
1.9
1.6
1.3
1.0
15.0
12.5
10.0
7.5
R
= 0.06Ω, R
=
∞
CL
FO
V
= 0V
o
R
= 0.18Ω, R = 0
FO
CL
60
TPA12
TPA12A
V
= 24V
40
o
5.0
V = 0V
o
20
0
.7
.4
2.5
0
V
o
= -24V
0
0
20 40 60
80 100 120 140
-50 -25
0
25
50
75 100 125
-50 -25
25
50
75 100 125
CASE TEMPERATURE o
C
CASE TEMPERATURE o
C
CASE TEMPERATURE o
C
SMALL SIGNAL RESPONSE
PHASE RESPONSE
POWER RESPONSE
120
100
68
0
abs(+V )+abs(-V )=100V
s
s
100
80
-30
-60
46
32
22
60
-90
abs(+V )+abs(-V )=80V
s
s
40
-120
-150
abs(+V )+abs(-V )=30V
s
s
15
10
20
0
-180
-210
6.8
4.6
-20
1
10 100 1K 10K 100K 1M 10M
FREQUENCY (Hz)
10K
20K
30K
50K 70K 100K
1
10 100 1K 10K 100K 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
COMMON MODE REJECTION
INPUT NOISE
PULSE RESPONSE
100
70
8
6
120
V
= ±5V, t = 100ns
r
IN
100
80
4
2
0
50
40
60
30
-2
-4
40
20
20
0
-6
-8
10
1
10
100
1K
10K 100K 1M
0
2
4
6
8
10 12
10
100
1K
10K
100K
FREQUENCY (Hz)
TIME (µs)
FREQUENCY (Hz)
HARMONIC DISTORTION
QUIESCENT CURRENT
OUTPUT VOLTAGE SWING
3
1
1.6
6
AV = 10
VS = ±37V
1.4
1.2
1.0
0.8
5
4
RL = 4Ω
0.3
0.1
-V
o
3
0.03
+V
o
2
1
0.01
0.6
0.4
0.003
40
50
60
70
80
90
100
0
3
6
9
12
15
100 300 1K
3K
10K 30K 100K
OUTPUT CURRENT (A)
FREQUENCY (Hz)
TOTAL SUPPLY VOLTAGE (V)
TPA12/12A Rev. B Oct. 2006
DISCUSSION OF PERFORMANCE
Short to ±VS
±Vs C,L or EMF Load Common
Short to
SAFE OPERATING AREA (SOA)
The output stage of most power amplifiers has three
distinct limitations:
50V
40V
35V
30V
25V
20V
15V
0.30A
0.58A
0.87A
1.50A
2.40A
2.90A
4.20A
2.4A
2.9A
3.7A
4.1A
4.9A
6.3A
8.0A
1) The current handling capability of the transistor
geometry and the wire bonds.
2) The second breakdown effect which occurs
whenever the simultaneous collector current and
collector-emitter voltage exceeds specified limits.
3) The junction temperature of the output resistors.
These simplified limits may be exceeded with further
analysis using the operating conditions for a specific
application.
transistors.
SOA
15
SECOND BREAKDOWN
10
6.0
4.0
CURRENT LIMIT
For fixed current limit, leave pin 7 open and use the
equations in 1 and 2.
2.0
1.0
0.6
R
CL = 0.65/LCL
(1)
(2)
ICL = 0.65/RCL
0.4
0.3
Where:
10
20
30
40 50
70
100
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE (V)
ICL is the current limit in amperes.
RCL is the current limit resistor in ohms.
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.
For certain applications the foldover current limit
adds a slope to the current limit which allows more
power to be delivered to the load without violating
the SOA. For maximum foldover slope, ground pin
7and use equations 3 and 4.
ICL= (0.65+(Vo*0.014)) / RCL
(3)
(4)
1.Capacitive and dynamic* loads up to the following
maximums are safe with the current limits set as
specified.
RCL =( 0.65 + (Vo * 0.014)) / ICL
Where Vo is the output voltage in volts.
Most designers start with either equation 1 to set
RCL for the desired output current at 0V out or with
equation 4 set to RCL at the maximum output
voltage. Equation 3 should then be used to plot the
resulting foldover limits on the SOA graph. If
equation 3 results in a negative current limit,
foldover slope must be reduced. This can happen
when the output voltage is the opposite polarity of
the supply conducting the current.
Capacitive Load
±Vs ILIM = 5A ILIM = 10A
125µF
Inductive Load
ILIM = 5A
ILIM= 10A
50V
40V
35V
30V
25V
20V
15V
200µF
500µF
2.0mF
7.0mF
25mF
5mH
15mH
50mH
2.0mH
3.0mH
5.0mH
10mH
20mH
30mH
50mH
350µF
850µF
2.5mF
10mF
20mF
60mF
150mH
500mH
1,000mH
2,500mH
60mF
150mF
In applications where a reduced foldover slope is
desired, this can be achieved by adding a resistor
(RFO) between pin 7 and ground. Use equations 5
and 6 with this new resistor in the circuit.
2. The amplifier can handle any EMF generating or
reactive load and short circuits to the supply rail or
common if the current limits are set as follows at
Tc = 25OC.
ICL= ((0.65+(VO*0.014)/(10.14+RFO)) / RCL
RCL= ((0.65+(VO*0.014)/(10.14+RFO)) / ICL
(5)
(6)
*
If the inductive load is driven near steady state
conditions, allowing the output voltage to drop more than
8V below the supply rail with ILIM = 15A or 25V below the
supply rail with ILIM = 5A while the amplifier is current
limiting, the inductor must be capacitively coupled or the
current limit must be lowered to meet SOA criteria.
Where RFO is in K ohms.
TPA12/12A Rev. B Oct. 2006
MECHANICAL
TO3-8 Package
TPA12/12A Rev. B Oct. 2006
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