APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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TYPICAL APPLICATION
The high power bandwidth and high voltage output of the
PA04 allows driving sonar transducers via a resonant circuit
including the transducer and a matching transformer. The
load circuit appears resistive to the PA04. Control logic turns
off the amplier in sleep mode.
Sonar Transducer Driver
EXTERNAL CONNECTIONS
PHASE COMPENSATION
Gain CC RC
1 470pF 120Ω
>3 220pF 120Ω
≥10 100pF 120Ω
CC RATED FOR FULL SUPPLY VOLTAGE
*See “BOOST OPERATION” paragraph.
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FEATURES
• HIGH INTERNAL DISSIPATION — 200 WATTS
• HIGH VOLTAGE, HIGH CURRENT — 200V, 20A
• HIGH SLEW RATE — 50V/µS
• 4 WIRE CURRENT LIMIT SENSING
• LOW DISTORTION
• EXTERNAL SLEEP MODE CONTROL
• OPTIONAL BOOST VOLTAGE INPUTS
• EVALUATION KIT — SEE EK09
APPLICATIONS
• SONAR TRANSDUCER DRIVER
• LINEAR AND ROTARY MOTOR DRIVES
• YOKE/MAGNETIC FIELD EXCITATION
• PROGRAMMABLE POWER SUPPLIES TO ±95V
• AUDIO UP TO 400W
DESCRIPTION
The PA04 is a high voltage MOSFET power operational
amplier that extends the performance limits of power ampli-
ers in slew rate and power bandwidth, while maintaining high
current and power dissipation ratings.
The PA04 is a highly exible amplier. The sleep mode
feature allows ultra-low quiescent current for standby opera-
tion or load protection by disabling the entire amplier. Boost
voltage inputs allow the small signal portion of the amplier to
operate at a higher voltage than the high current output stage.
The amplier is then biased to achieve close linear swings to
the supply rails at high currents for extra efcient operation.
External compensation tailors 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 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
will void product warranty.
EQUIVALENT SCHEMATIC
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MICROTECHNOLOGY
108&301&3"5*0/"-".1-*'*&3
PA04 • PA04A
12-PIN DIP
PACKAGE STYLE CR
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
2
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS SUPPLY VOLTAGE, +VS to –VS 200V
BOOST VOLTAGE SUPPLY VOLTAGE +20V
OUTPUT CURRENT, within SOA 20A
POWER DISSIPATION, internal 200W
INPUT VOLTAGE, differential ±20V
INPUT VOLTAGE, common mode ±VS
TEMPERATURE, pin solder - 10s 300°C
TEMPERATURE, junction2 150°C
TEMPERATURE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –55 to +125°C
PA04  •  PA04A
SPECIFICATIONS
PA04 PA04A
PARAMETER TEST CONDITIONS 1 MIN TYP MAX MIN TYP MAX UNITS
INPUT
OFFSET VOLTAGE, initial 5 10 2 5 mV
OFFSET VOLTAGE, vs. temperature Full temperature range 30 50 10 30 µV/°C
OFFSET VOLTAGE, vs. supply 15 * µV/V
OFFSET VOLTAGE, vs. power Full temperature range 30 10 µV/W
BIAS CURRENT, initial 10 50 5 20 pA
BIAS CURRENT, vs. supply .01 * pA/V
OFFSET CURRENT, initial 10 50 5 20 pA
INPUT IMPEDANCE, DC 1011 * Ω
INPUT CAPACITANCE 13 * pF
COMMON MODE VOLTAGE RANGE Full temperature range ±VB-8 * V
COMMON MODE REJECTION, DC Full temp. range, VCM = ±20V 86 98 * * dB
INPUT NOISE 100kHz BW, RS = 1KΩ 10 * µVrms
GAIN
OPEN LOOP, @ 15Hz Full temperature range, CC = 100pF 94 102 * * dB
GAIN BANDWIDTH PRODUCT IO = 10A 2 * MHz
POWER BANDWIDTH RL = 4.5Ω, VO = 180V p-p 90 * kHz
CC = 100pF, RC = 120Ω
PHASE MARGIN Full temperature range 60 * °
OUTPUT
VOLTAGE SWING IO = 15A ±VS-8.8 ±VS-7.5 * * V
VOLTAGE SWING VBOOST = Vs + 5V, IO = 20A ±VS-6.8 ±VS-5.5 * * V
CURRENT, peak 20 * A
SETTLING TIME to .1% AV = 1, 10V step, RL = 4Ω 2.5 * µs
SLEW RATE AV = 10, CC = 100pF, RC = 120Ω 40 50 * V/µs
CAPACITIVE LOAD Full temperature range, AV = +1 10 * nF
RESISTANCE 2 * Ω
POWER SUPPLY
VOLTAGE Full temperature range ±15 ±75 ±100 * * * V
CURRENT, quiescent, boost supply 30 40 * * mA
CURRENT, quiescent, total 70 90 * * mA
CURRENT, quiescent, total, sleep mode Full temperature range 3 5 * * mA
THERMAL
RESISTANCE, AC, junction to case3 Full temperature range, F>60Hz .3 .4 * * °C/W
RESISTANCE, DC, junction to case Full temperature range, F<60Hz .5 .6 * * °C/W
RESISTANCE4, junction to air Full temperature range 12 * °C/W
TEMPERATURE RANGE, case Meets full range specication –25 85 * * °C
NOTES: * The specication of PA04A is identical to the specication for PA04 in applicable column to the left.
1. Unless otherwise noted: TC = 25°C, CC = 470pF, RC = 120 ohms. DC input specications are ± value given. Power supply volt-
age 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 PA04 must be used with a heatsink or the quiescent power may drive the unit to junction temperatures higher than 150°C.
The PA04 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.
CAUTION
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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TYPICAL PERFORMANCE
GRAPHS
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APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
4
OPERATING
CONSIDERATIONS PA04  •  PA04A
GENERAL
Please read Application Note 1 "General Operating Con-
siderations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specication
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 amplier out-
put 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 amplier 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:
.76
RCL =
ILIMIT
Figure 1.
Current Limit.
SAFE OPERATING AREA (SOA)
The MOSFET output stage of this power operational ampli-
er 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 y-
back. However, for protection against sustained, high
energy yback, external fast-recovery diodes should
be used.
SLEEP MODE OPERATION
In the sleep mode, pin 12 (sleep) is tied to pin 9 (+VBOOST).
This disables the amplier’s internal reference and the am-
plier shuts down except for a trickle current of 3 mA which
ows into pin 12. Pin 12 should be left open if the sleep mode
is not required.
Several possible circuits can be built to take advantage of
this mode. In Figure 2A a small signal relay is driven by a logic
gate. This removes the requirement to deal with the common
mode voltage that exists on the shutoff circuitry since the sleep
mode is referenced to the +VBOOST voltage.
In Figure 2B, circuitry is used to level translate the sleep
mode input signal. The differential input activates sleep mode
with a differential logic level signal and allows common mode
voltages to ±VBOOST.
BOOST OPERATION
With the VBOOST feature the small signal stages of the
amplier are operated at higher supply voltages than the
amplier’s high current output stage. +VBOOST (pin 9) and
–VBOOST (pin 5) are connected to the small signal circuitry of
the amplier. +VS (pin 8) and –VS (pin 6) are connected to the
high current output stage. An additional 5V on the VBOOST pins
is sufcient to allow the small signal stages to drive the output
transistors into saturation and improve the output voltage
swing for extra efcient 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
The external compensation components CC and RC are con-
nected to pins 3 and 4. Unity gain stability can be achieved at
any compensation capacitance greater than 330 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.
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This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice.
PA04U REV K OCTOBER 2006 © 2006 Apex Microtechnology Corp.