PA04 • PA04A
PA04U 1
PA04, PA04A
12
9
1
56
8
10
11
7
2
4
3
SLEEP
+VBOOST
Q10
–IN
Q14 Q15
Q21
–VBOOST COMP
Q22
+IN
Q20
COMP
Q17
D1
Q5
Q12
Q19
Q26
Q18
Q13
+Vs
Q6
ILIM
ILIM
OUT
Q7
–Vs
D5 D6
D2
D3
D7 D9
D8
D4
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.
CONTROL
LOGIC
ULTRA-
SONIC
DRIVE
Rf
Ri112
2
7
10
11
RCL
TUNED
TRANSFORMER
PA04
TOPVIEW
-INPUT
+INPUT
SLEEP
CURRENT LIMIT
CURRENT LIMIT
CCRC
1
2
3
4
5
6
12
11
10
9
8
7
TOPVIEW
COMP
-VBOOST
-SUPPLY
+SUPPLY
OUTPUT
*
*
COMP
+VBOOST
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 efficient 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
12-PIN DIP
PACKAGE STYLE CR
Power Operational Amplifier
PA04 • PA04A
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
www.apexanalog.com SEP 2012
PA04U REVN
PA04 • PA04A
2 PA04U
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 350°C
TEMPERATURE, junction2 150°C
TEMPERATURE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –55 to +125°C
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
PA04 • PA04A
PA04U 3
0 25 50 75 100 125 150
TEMPERATURE, T
C
(°C)
0
50
150
POWER DERATING
INTERNAL POWER DISSIPATION, P(W)
100 1K 10M
FREQUENCY F (Hz)
0
POWER SUPPLY REJECTION
–50 0 75 125
CASE TEMPERATURE, T
C
(°C)
NORMALIZED CURRENT LIMIT, (%)
10 10M
FREQUENCY,Ff (Hz)
0
120
SMALL SIGNAL GAIN
OPEN LOOP GAIN RESPONSE, A (dB)
40
80
FREQUENCY, F (Hz)
SMALL SIGNAL PHASE
0 5 15 20
2
VOLTAGE DROP FROM SUPPLY, VS–VO (V)
30 300 30K
FREQUENCY, F (Hz)
.001
.02
.2
HARMONIC DISTORTION
DISTORTION, THD (%)
.002
.01
.1
30 200
TOTAL SUPPLY VOLTAGE, V
S
(V)
.8
.9
1.2
QUIESCENT CURRENT
NORMALIZED QUIESCENT CURRENT, IQ (X)
1.0
1.1
10K 50K 1M
FREQUENCY, F (Hz)
20
60
180
200
POWER RESPONSE
OUTPUT VOLTAGE, V
O
(V
P-P
)
80
100
10
FREQUENCY, F (Hz)
0
COMMON MODE REJECTION
COMMON MODE REJECTION, CMR (dB)
40
80
100
1M100 1K 0 10 15
TIME, t (µs)
–5
0
PULSE RESPONSE
OUTPUT VOLTAGE, V
O
(V)
305 20
100 200
EXT. COMPENSATION CAPACITOR C
C
(pF)
0
60
SLEW RATE
SLEW RATE, SR (V/s)
40
100 1K 3K 10K 20K .6M
40
25
CURRENT LIMIT
50
60
70
10 10K 100K 1M
100
200
OUTPUT VOLTAGE SWING
10
50 100 150
20
–7.5
1 100 1K 10K 100K 1M
20
40
60
80
100
300 400 500
OPEN LOOP PHASE, Ф (°)
100 10M1 10 1K 10K 100K 1M
–180
–135
–90
–45
0
4
6
8
10
12
OUTPUT CURRENT, I
O
(A)
10K 100K
–2.5
2.5
5
7.5
–25 25 100
80
90
100
110
120
130
.005
.05
.2M
120
150
20
60
T = T
C
T = T
A
R
C
= 120Ω
R
L
= 4Ω
V
BOOST
= V
S
V
BOOST
= V
S
+ 5V
A
V
= +1
A
V
= 10
R
L
= 4Ω
C
C
= 100pF, R
C
= 120Ω
V
S
= 62V
R
C
=120Ω
R
L
= 4.0Ω
C
C
= 470pF
C
C
= 220pF
C
C
= 100pF
C
C
= 470pF
P
O
= 200W
P
O
= 1W
P
O
= 300W
R
C
= 120Ω
R
L
= 4Ω
POWER SUPPLY REJECTION, PSR (dB)
4Ω LOAD
R
C
= 120Ω
C
C
= 470pF
C
C
= 100pF
C
C
= 220pF
C
C
= 470pF
C
C
= 220pF
C
C
= 100pF
PA04 • PA04A
4 PA04U
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.apexanalog.com for design tools that
help automate tasks such as calculations for stability, internal
power dissipation, current limit; heat sink selection; Apex Mi-
crotechnology’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 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 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 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
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.
FIGURE 2A. SLEEP MODE CIRCUIT.
LOGIC K1 9
12
9
12
+V
BOOST
SLEEP
+V
BOOST
SLEEP
560Ω
470Ω
Q1
1KΩ
Q2
–V
BOOST
470Ω
LOGIC
INPUT
+
-
FIGURE 2B. SLEEP MODE CIRCUIT.
Rf
Ri1
2
10
11
RCL
PA04
RP
RL
CL
CL
INPUT 7
SOA
5.0
2.0
.5
.2
2
SUPPLY TO OUTPUT DIFFERENTIAL (V)
OUTPUT CURRENT (A)
5 10 20 50 200
20
DC T
C
= 125°C
DC T
C
= 85°C
DC T
C
= 25°C
t = 10ms
t = 1ms
10
100
1.0
PA04 • PA04A
PA04U 5
NEED TECHNICAL HELP? CONTACT APEX SUPPORT!
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For inquiries via email, please contact apex.support@apexanalog.com.
International customers can also request support by contacting their local Apex Microtechnology Sales Representative.
To nd the one nearest to you, go to www.apexanalog.com
IMPORTANT NOTICE
Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change
without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further
notice to any specications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this informa-
tion, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual
property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the informa-
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APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR
LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDER-
STOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK.
Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks
of their respective holders.
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
www.apexanalog.com SEP 2012
PA04U REVN