APEX PA10

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FEATURES
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GAIN BANDWIDTH PRODUCT — 4MHz
TEMPERATURE RANGE — –55 to +125°C (PA10A)
EXCELLENT LINEARITY — Class A/B Output
WIDE SUPPLY RANGE — ±10V to ±50V
HIGH OUTPUT CURRENT — ±5A Peak
APPLICATIONS
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MOTOR, VALVE AND ACTUATOR CONTROL
MAGNETIC DEFLECTION CIRCUITS UP TO 4A
POWER TRANSDUCERS UP TO 100kHz
TEMPERATURE CONTROL UP TO 180W
PROGRAMMABLE POWER SUPPLIES UP TO 90V
AUDIO AMPLIFIERS UP TO 60W RMS
8-PIN TO-3
PACKAGE STYLE CE
TYPICAL APPLICATION
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DESCRIPTION
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DC and low distortion AC current waveforms are delivered
to a grounded load by using matched resistors (A and B
sections) and taking advantage of the high common mode
rejection of the PA10.
Foldover current limit is used to modify current limits based
on output voltage. When load resistance drops to 0, the current
is limited based on output voltage. When load resistance drops
to 0, the current limit is 0.79A resulting in an internal dissipation of 33.3 W. When output voltage increases to 36V, the
current limit is 1.69A. Refer to Application Note 9 on foldover
limiting for details.
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FIGURE 1. VOLTAGE-TO-CURRENT CONVERSION
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EQUIVALENT SCHEMATIC
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The PA10 and PA10A are high voltage, high output current
operational amplifiers designed to drive resistive, inductive
and capacitive loads. For optimum linearity, the output stage
is biased for class A/B operation. The safe operating area
(SOA) can be observed for all operating conditions by selection of user programmable current limiting resistors. Both
amplifiers are internally compensated for all gain settings. For
continuous operation under load, a heatsink of proper rating
is recommended.
This hybrid integrated circuit utilizes thick film (cermet)
resistors, ceramic capacitors and semiconductor chips to
maximize reliability, minimize size and give top performance.
Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The 8-pin TO-3
package is hermetically sealed and electrically isolated. The
use of compressible isolation washers voids the warranty.
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EXTERNAL CONNECTIONS
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected]
1
PA10 • PA10A
ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
SUPPLY VOLTAGE, +VS to –VS
OUTPUT CURRENT, within SOA
POWER DISSIPATION, internal
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder - 10s
TEMPERATURE, junction1
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE RANGE, case
SPECIFICATIONS
PARAMETER
TEST CONDITIONS 2, 5
MIN
PA10
TYP
±VS–5
74
±2
±10
±30
±20
12
±50
.±10
±12
±50
200
3
±VS–3
100
100V
5A
67W
±VS –3V
±VS
300°C
200°C
–65 to +150°C
–55 to +125°C
MAX
MIN
PA10A
TYP
*
*
±1
*
*
*
10
*
*
±5
*
*
*
*
*
MAX
UNITS
±4
±40
*
mV
µV/°C
µV/V
µVW
nA
pA/°C
pA/V
nA
pA/°C
MΩ
pF
V
dB
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE, vs. temperature
OFFSET VOLTAGE, vs. supply
OFFSET VOLTAGE, vs. power
BIAS CURRENT, initial
BIAS CURRENT, vs. temperature
BIAS CURRENT, vs. supply
OFFSET CURRENT, initial
OFFSET CURRENT, vs. temperature
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
COMMON MODE VOLTAGE RANGE3
COMMON MODE REJECTION, DC3
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
Full temperature range
Full temp. range, VCM = ±VS –6V
±6
±65
±200
30
±500
±30
20
*
±10
GAIN
OPEN LOOP GAIN at 10Hz
OPEN LOOP GAIN at 10Hz
GAIN BANDWIDTH PRODUCT @ 1MHz
POWER BANDWIDTH
PHASE MARGIN
TC = 25°C, 1KΩ load
Full temp. range, 15Ω load
TC = 25°C, 15Ω load
TC = 25°C, 15Ω load
Full temp. range, 15Ω load
96
10
110
108
4
15
35
*
*
*
*
*
*
*
dB
dB
MHz
kHz
°
*
*
*
*
V
V
V
A
µs
V/µs
nF
nF
nF
OUTPUT
VOLTAGE SWING3
VOLTAGE SWING3
VOLTAGE SWING3
CURRENT, peak
SETTLING TIME to .1%
SLEW RATE
CAPACITIVE LOAD
CAPACITIVE LOAD
CAPACITIVE LOAD
TC = 25°C, IO = 5A
Full temp. range, IO = 2A
Full temp. range, IO = 80mA
TC = 25°C
TC = 25°C, 2V step
TC = 25°C
Full temperature range, AV = 1
Full temperature range, AV = 2.5
Full temperature range, AV > 10
±VS–8
±VS–6
±VS–5
5
±VS–5
±VS–6
*
*
*
2
2
3
±10
8
±40
15
±45
30
1.9
2.4
30
2.1
2.6
.68
10
SOA
*
*
*
*
*
*
*
±50
*
V
mA
*
*
*
*
*
°C/W
°C/W
°C/W
°C
POWER SUPPLY
VOLTAGE
CURRENT, quiescent
Full temperature range
TC = 25°C
THERMAL
RESISTANCE, AC, junction to case4
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
NOTES:
*
1.
2.
3.
4.
5.
CAUTION
TC = –55 to +125°C, F > 60Hz
TC = –55 to +125°C
TC = –55 to +125°C
Meets full range specifications
–25
+85
–55
+125
The specification of PA10A is identical to the specification for PA10 in applicable column to the left.
Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation
to achieve high MTTF.
The power supply voltage for all tests is ±40, unless otherwise noted as a test condition.
+VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS.
Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
Full temperature range specifications are guaranteed but not tested.
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or
subject to temperatures in excess of 850°C to avoid generating toxic fumes.
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
2
PA10 • PA10A
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TYPICAL PERFORMANCE
GRAPHS
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL [email protected]
3
OPERATING
CONSIDERATIONS
PA10 • PA10A
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.apexmicrotech.com for design tools
that help automate tasks such as calculations for stability,
internal power dissipation, current limit; heat sink selection;
Apex’s complete Application Notes library; Technical Seminar
Workbook; and Evaluation Kits.
±VS
50V
40V
35V
30V
25V
20V
15V
SHORT TO ±VS
C, L, OR EMF LOAD
.21A
.3A
.36A
.46A
.61A
.87A
1.4A
SHORT TO
COMMON
.61A
.87A
1.0A
1.4A
1.7A
2.2A
2.9A
SAFE OPERATING AREA (SOA)
CURRENT LIMITING
The output stage of most power amplifiers has three distinct
limitations:
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.
Refer to Application Note 9, "Current Limiting", for details of
both fixed and foldover current limit operation. Visit the Apex
web site at www.apexmicrotech.com for a copy of the Power
Design spreadsheet (Excel) which plots current limits vs. steady
state SOA. Beware that current limit should be thought of as a
+/–20% function initially and varies about 2:1 over the range
of –55°C to 125°C.
For fixed current limit, leave pin 7 open and use equations
1 and 2.
RCL = 0.65/LCL
(1)
ICL = 0.65/RCL
(2)
Where:
ICL is the current limit in amperes.
RCL is the current limit resistor in ohms.
For certain applications, 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 7 and use equations 3 and 4.
0.65 + (Vo * 0.014)
(3)
ICL =
RCL
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3. The junction temperature of the output transistors.
The SOA curves combine the effect of these limits. 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.
1. For DC outputs, especially those resulting from fault conditions, check worst case stress levels against the new SOA
graph.
For sine wave outputs, use Power Design1 to plot a load
line. Make sure the load line does not cross the 0.5ms limit
and that excursions beyond any other second breakdown
line do not exceed the time label, and have a duty cycle of
no more than 10%.
1
Note 1. Power Design is a self-extracting Excel spreadsheet available free from www.apexmicrotech.com
For other waveform outputs, manual load line plotting
is recommended. Applications Note 22, SOA AND LOAD
LINES, will be helpful. A Spice type analysis can be very
useful in that a hardware setup often calls for instruments
or amplifiers with wide common mode rejection ranges.
2. The amplifier can handle any EMF generating or reactive
load and short circuits to the supply rail or shorts to common if the current limits are set as follows at TC = 85°C:
RCL =
0.65 + (Vo * 0.014)
ICL
(4)
Where:
Vo is the output voltage in volts.
Most designers start with either equation 1 to set RCL for the
desired current at 0v out, or with equation 4 to set 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.
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 4 and 5 with this new resistor
in the circuit.
0.65 + Vo * 0.14
10.14 + RFO
ICL =
RCL
0.65 +
RCL =
Vo * 0.14
10.14 + RFO
ICL
(5)
(6)
Where:
RFO is in K ohms.
This data
sheet has been carefullyCORPORATION
checked and is believed
to beNORTH
reliable, however,
no responsibility
is assumed for
possible inaccuracies
omissions.
All specificationsHOTLINE:
are subject to
notice.
APEX
MICROTECHNOLOGY
• 5980
SHANNON
ROAD • TUCSON,
ARIZONA
85741 • orUSA
• APPLICATIONS
1 change
(800)without
546-2739
4
PA10U REV O OCTOBER 2004
© 2004 Apex Microtechnology Corp.