APEX PA05

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FEATURES
•
•
•
•
•
•
•
•
HIGH INTERNAL DISSIPATION — 250 WATTS
HIGH VOLTAGE, HIGH CURRENT — 100V, 30A
HIGH SLEW RATE — 100V/µS
4 WIRE CURRENT LIMIT SENSING
LOW DISTORTION
EXTERNAL SHUTDOWN CONTROL
OPTIONAL BOOST VOLTAGE INPUTS
EVALUATION KIT — SEE EK09
12-PIN POWER DIP
PACKAGE STYLE CR
The JEDEC MO-127 12-pin Power Dip™ package (see
Package Outlines) is hermetically sealed and isolated from
the internal circuits. The use of compressible thermal washers
and/or improper mounting torque will void the product warranty.
Please see “General Operating Considerations”.
APPLICATIONS
• LINEAR AND ROTARY MOTOR DRIVES
• sonar transducer driver
• YOKE/MAGNETIC FIELD EXCITATION
• PROGRAMMABLE POWER SUPPLIES TO ±45V
• AUDIO UP TO 500W
TYPICAL APPLICATION
DESCRIPTION
The PA05 is a high voltage MOSFET power operational
amplifier that extends the performance limits of power amplifiers in slew rate and power bandwidth, while maintaining high
current and power dissipation ratings.
The PA05 is a highly flexible amplifier. The shutdown control
feature allows the output stage to be turned off for standby
operation or load protection during fault conditions. Boost
voltage inputs allow the small signal portion of the amplifier to
operate at a higher voltage than the high current output stage.
The amplifier is then biased to achieve close linear swings to
the supply rails at high currents for extra efficient operation.
External compensation tailors slew rate and bandwidth performance to user needs. A four wire sense technique allows
precision current limiting without the need to consider internal
or external milliohm parasitic resistance in the output line. The
output stage is protected by thermal limiting circuits above
junction temperatures of 175°C.
EQUIVALENT SCHEMATIC
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EXTERNAL CONNECTIONS
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The high power bandwidth of the PA05 allows driving sonar
transducers via a resonant circuit including the transducer
and a matching transformer. The load circuit appears resistive to the PA05. Control logic turns off the amplifier's output
during shutdown.
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PHASE COMPENSATION
Gain
CC
RC
1
470pF
120Ω
>3
220pF
120Ω
≥10
82pF
120Ω
CC RATED FOR FULL SUPPLY VOLTAGE
*See BOOST OPERATION paragraph.
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
1
PA05 • PA05A
ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
SUPPLY VOLTAGE, +VS to –VS
BOOST VOLTAGE
OUTPUT CURRENT, continuous within SOA
POWER DISSIPATION, internal
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder - 10s
TEMPERATURE, junction2
TEMPERATURE, storage
OPERATING TEMPERATURE RANGE, case
SPECIFICATIONS
PARAMETER
TEST CONDITIONS 1
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
GAIN BANDWIDTH PRODUCT
POWER BANDWIDTH
PHASE MARGIN
OUTPUT
VOLTAGE SWING
VOLTAGE SWING
CURRENT, peak
SETTLING TIME to .1%
SLEW RATE
CAPACITIVE LOAD
RESISTANCE
POWER SUPPLY
VOLTAGE
CURRENT, quiescent, boost supply
CURRENT, quiescent, total
CURRENT, quiescent, total, shutdown
THERMAL
RESISTANCE, AC, junction to case3
RESISTANCE, DC, junction to case
RESISTANCE, junction to air4
TEMPERATURE RANGE, case
MIN
Full temperature range
Full temperature range
Full temperature range
Full temp. range, VCM = ±20V
100KHz BW, RS = 1KΩ
Full temperature range, CC = 82pF
RL = 10Ω
RL = 4Ω, VO = 80VP-P, AV = –10
CC = 82pF, RC = 120Ω
Full temperature range, CC = 470pF
IO = 20A
VBOOST = Vs + 5V, IO = 30A
AV = +1, 10V step, RL = 4Ω
AV = –10, CC = 82pF, RC = 120Ω
Full temperature range, AV = +1
IO = 0, No load, 2MHz
IO = 1A, 2MHz
Full temperature range
Full temperature range, F>60Hz
Full temperature range, F<60Hz
Full temperature range
Meets full range specification
±VB–8
90
94
PA05
TYP
5
20
10
30
10
.01
10
1011
13
MAX
100V
SUPPLY VOLTAGE +20V
30A
250W
±20V
±VB
300°C
175°C
–65 to +150°C
–55 to +125°C
MIN
10
50
30
50
50
*
*
100
10
102
3
400
*
60
±VS–9.5 ±VS–8.7
±VS–5.8 ±VS–5.0
30
2.5
80
100
2.2
5
2
±15
–25
*
*
*
*
±45
46
90
46
±50
56
120
56
.3
.4
12
.4
.5
85
*
*
PA05A
TYP
MAX
UNITS
5
30
*
*
*
mV
µV/°C
µV/V
µV/W
pA
pA/V
pA
Ω
pF
V
dB
µVrms
*
*
*
dB
MHz
kHz
*
°
*
*
V
V
A
µs
V/µs
nF
Ω
Ω
2
10
*
10
5
*
5
*
*
20
20
*
*
*
*
*
*
*
*
*
*
*
*
V
mA
mA
mA
*
*
*
*
*
°C/W
°C/W
°C/W
°C
*
NOTES: * The specification of PA05A is identical to the specification for PA05 in applicable column to the left.
1. Unless otherwise noted: TC = 25°C, CC = 470pF, RC = 120 ohms. DC input specifications are ± value given. Power supply voltage is typical rating. ±VBOOST = ±VS.
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 PA05 must be used with a heatsink or the quiescent power may drive the unit to junction temperatures higher than 150°C.
CAUTION
The PA05 is constructed from MOSFET transistors. ESD handling procedures must be observed.
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
PA05 • PA05A
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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 prodlit@apexmicrotech.com
3
OPERATING
CONSIDERATIONS
PA05 • PA05A
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.
CURRENT LIMIT
The two current limit sense lines are to be connected directly
across the current limit sense resistor. For the current limit to
work correctly, pin 11 must be connected to the amplifier output side and pin 10 connected to the load side of the current
limit resistor, RCL, as shown in Figure 1. This connection will
bypass any parasitic resistances, 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. If current limiting is
not used, pins 10 and 11 must be tied to pin 7.
The value of the current limit resistor can be calculated as
follows:
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The output stage thermal protection circuit engages when
junction temperatures reach approximately 175C. If the condition remains that caused the shutdown, the amplifier may
oscillate in and out of shutdown, creating high peak power
stresses reducing the reliability of the device.
SHUTDOWN OPERATION
To disable the output stage, pin 12 is connected to ground
via relay contacts or via an electronic switch. The switching
device must be capable of sinking 2mA to complete shutdown
and capable of standing off the supply voltage +VS. See Figure
2 for suggested circuits.
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SAFE OPERATING AREA (SOA)
The MOSFET output stage of this power operational amplifier has two distinct limitations:
1. The current handling capability of the MOSFET geometry
and the wire bonds.
2. The junction temperature of the output MOSFETs.
NOTE: The output stage is protected against transient flyback. However, for protection against sustained, high energy
flyback, external fast-recovery diodes should be used.
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BOOST OPERATION
With the VBOOST feature, the small signal stages of the amplifier are operated at higher supply voltages than the amplifier’s
high current output stage. +VBOOST (pin 9), and –VBOOST (pin
5) are connected to the small signal circuitry of the amplifier.
+VS (pin 8) and –VS (pin 6) are connected to the high current
output stage. An additional 5V on the VBOOST 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 swings to the
supply rails is not required the +VBOOST and +VS pins must be
strapped together as well as the –VBOOST and –VS pins. The
boost voltage pins must not be at a voltage lower than the
VS pins.
COMPENSATION
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From an internal circuitry standpoint, shutdown is just a
special case of current limit where the allowed output current
is zero. As with current limit, however, a small current does
flow in the output during shutdown. A load impedance of 100
ohms or less is required to insure the output transistors are
turned off. Note that even though the output transistors are off
the output pin is not open circuited because of the shutdown
operating current.
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The external compensation components CC and RC are connected to pins 3 and 4. Unity gain stability can be achieved at
any compensation capacitance greater than 470 pF with at
least 60 degrees of phase margin. At higher gains, more phase
shift can be tolerated in most designs and the compensation
capacitance can accordingly be reduced, resulting in higher
bandwidth and slew rate. Use the typical operating curves as
a guide to select CC and RC for the application.
This data
sheet has been carefullyCORPORATION
checked and is believed
to be NORTH
reliable, however,
no responsibility
is assumed for
possible inaccuracies
omissions.
All specifications HOTLINE:
are subject to1change
notice.
APEX
MICROTECHNOLOGY
• 5980
SHANNON
ROAD • TUCSON,
ARIZONA
85741 •orUSA
• APPLICATIONS
(800)without
546-2739
4
PA05U REV H AUGUST 2005
© 2005 Apex Microtechnology Corp.