Apex PA04A, PA04 Datasheet

POWER OPERATIONAL AMPLIFIERS

MICROTECHNOLOGY

HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX [phone]

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 EK04

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
amplifier that extends the performance limits of power ampli­fiers in slew rate and power bandwidth, while maintaining high
current and power dissipation ratings.

The PA04 is a highly flexible amplifier. The sleep mode
feature allows ultra-low quiescent current for standby opera­tion or load protection by disabling the entire amplifier. 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 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

SLEEP

12

9

+V

BOOST

Q10

D5 D6

–IN

1

Q14 Q15

–V

Q21

BOOST

5

Q22

COMP

D1

Q5

D2
D3

Q12

+IN

2

4

COMP

3

Q20

Q17

D7
D8

Q19

Q26

+Vs

D4

D9

–Vs

8

Q13

Q18

6

PA04 • PA04A

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
amplifier in sleep mode.

R

R

C

C

*

PHASE COMPENSATION

Gain C

1 470pF 120Ω

>3 220pF 120Ω

≥10 100pF 120Ω

C

RATED FOR FULL SUPPLY VOLTAGE

C

*See “BOOST OPERATION” paragraph.

Q6

OUT

Q7

ULTRA-

SONIC
DRIVE

EXTERNAL CONNECTIONS

-INPUT

+INPUT

COMP

C

COMP

-V

BOOST

I

LIM

11

10

I

LIM

7

-SUPPLY

PA04

∆

USA BeO

TE949311

R

f

CONTROL

LOGIC

i

1

12

2

PA04

10

7

R

11

Sonar Transducer Driver

1
2
3

TOP

TOP

VIEW

VIEW

4
5
6

12
11
10

9
8
7

C

CL

TRANSFORMER

TUNED

SLEEP
CURRENT LIMIT
CURRENT LIMIT

+V

BOOST

*

+SUPPLY

OUTPUT

R

C

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE [phone] • FAX [phone] • ORDERS [phone] • EMAIL [e-mail]

P A04 • P A04A

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

SUPPLY VOLTAGE, +VS to –V
BOOST VOLTAGE SUPPLY VOLTAGE +20V

S

200V

OUTPUT CURRENT, within SOA 20A
POWER DISSIPATION, internal 200W
INPUT VOLTAGE, differential ±20V
INPUT VOLTAGE, common mode ±V
TEMPERATURE, pin solder - 10s 300°C
TEMPERATURE, junction

2

S

150°C
TEMPERATURE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –55 to +125°C

SPECIFICATIONS

PARAMETER TEST CONDITIONS

PA04

1

MIN TYP MAX MIN TYP MAX UNITS

PA04A

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 10

11

* 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 V
CURRENT, peak 20 * A

= Vs + 5V, IO = 20A ±VS-6.8 ±VS-5.5 * * V

BOOST

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 case

3

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 specification –25 85 * * °C

NOTES: * The specification of PA04A is identical to the specification for PA04 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. ±V

2. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation

BOOST

= ±VS.

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.

CAUTION

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.

APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: [phone]

TYPICAL PERFORMANCE
GRAPHS

P A04 • P A04A

200

POWER DERATING

150

T = T

C

100

50

T = T

A

0

0 25 50 75 100 125 150

INTERNAL POWER DISSIPATION, P(W)

120

80

40

OPEN LOOP GAIN RESPONSE, A(dB)

TEMPERATURE, T (°C)

SMALL SIGNAL GAIN

C

C

= 100pF

C

C

= 470pF

C

C

= 220pF

RC = 120Ω

0

R

= 4Ω

L

1 100 1K 10K100K 1M

10 10M

FREQUENCY,Ff (Hz)

POWER SUPPLY REJECTION

100

80

60

40

20

0

100 1K 10M

10 10K 100K 1M

POWER SUPPLY REJECTION, PSR (dB)

0

FREQUENCY F (Hz)

SMALL SIGNAL PHASE

RC = 120Ω
R

= 4Ω

L

–45

–90

CC = 470pF

= 220pF

C

–135

OPEN LOOP PHASE, (°)Φ

–180

C

C

= 100pF

C

100 10M1 10 1K 10K100K 1M

FREQUENCY, F (Hz)

60

SLEW RATE

40

4Ω LOAD

20

SLEW RATE, SR (V/µs)

RC = 120Ω

0

100 200

EXT. COMPENSATION CAPACITOR C (pF)

OUTPUT VOLTAGE SWING

(V)

O

12

–V

S

10

8

6

4

2

0 5 15 20

OUTPUT CURRENT, I (A)

VOLTAGE DROP FROM SUPPLY, V

300 400 500

S

V = V

BOOST

+ 5V

V = V

S

BOOST

10

O

C

COMMON MODE REJECTION

100

80

60

40

20

0

10

COMMON MODE REJECTION, CMR (dB)

.2
.1

.05

FREQUENCY, F (Hz)

HARMONIC DISTORTION

A = 10

V

R =4

Ω

L

C = 100pF, R = 120

C

±Vs = 62V

10K 100K

C

Ω

O

P = 300W

.02
.01

P = 1W

O

.005

DISTORTION, THD (%)

.002
.001

100 1K 3K 10K

30 300 30K

O

P = 200W

FREQUENCY, F (Hz)

7.5

O

2.5

–2.5

–5

OUTPUT VOLTAGE, V (V)

1M100 1K 0 10 15

–7.5

Q

1.2

1.1

1.0

NORMALIZED QUIESCENT CURRENT, I (X)

PULSE RESPONSE

5

0

A = +1

V

TIME, t (µs)

C = 470pF

C

25

QUIESCENT CURRENT

.9

.8

50 100 150

30 200

TOTAL SUPPLY VOLTAGE, V (V)

S

30520

130

CURRENT LIMIT

120
110
100

90
80

70
60

NORMALIZED CURRENT LIMIT, (%)

–50 0 75 125

–25 25 100

CASE TEMPERATURE, T (°C)

POWER RESPONSE

C = 470pF

C

)

200
180

150

PP

120

O

100

80

50

C

C = 220pFCC = 100pF

C

60

40

R =120

Ω

OUTPUT VOLTAGE, V (V

C

R = 4.0

Ω

L

20

20K .6M

10K 50K 1M

.2M

FREQUENCY, F (Hz)

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE [phone] • FAX [phone] • ORDERS [phone] • EMAIL [e-mail]

P A04 • PA04A

OPERATING

CONSIDERATIONS

GENERAL

Please read the “General Operating Considerations” sec­tion, which covers stability, supplies, heatsinking, mounting,
current limit, SOA interpretation, and specification interpreta­tion. Additional information can be found in the application
notes. For information on the package outline, heatsinks, and
mounting hardware, consult the “Accessory and Package
Mechanical Data” section of the handbook. The EK04 Evalu­ation Kit makes prototype circuits a snap by providing an
EK04PC proto circuit board, MS05 mating socket, HS11
heatsink and hardware kit.

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, R

connection will bypass any parasitic resistances, Rp, formed

, as shown in Figure 1. This

CL

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.

The value of the current limit resistor can be calculated as
follows:

.76

R

=

CL

I

LIMIT

R

f

Figure 1.
Current Limit.

R

INPUT

10

i

1

11

CL

2

PA04

R

R

CL

P

7

CL

R

L

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.

20

10

5.0

2.0

1.0

OUTPUT CURRENT (A)

.5

.2

2

5 10 20 50 200

SUPPLY TO OUTPUT DIFFERENTIAL (V)

DC Tc = 85°C

DC Tc = 125°C

t = 1ms

t = 10ms

DC Tc = 25°C

100

SLEEP MODE OPERATION

In the sleep mode, pin 12 (sleep) is tied to pin 9 (+V
This disables the amplifier’s internal reference and the ampli­fier shuts down except for a trickle current of 3 mA which flows
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 +V

BOOST

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 ±V

LOGIC

Figure 2A. Sleep mode circuit.

+

-

Figure 2B.
Sleep mode circuit.

BOOST

LOGIC
INPUT

470

470

.

K1

Ω

560

Ω

Q1

Ω

1K

Ω

Q2

–V

BOOST

9

12

9

12

+V

BOOST

SLEEP

+V

BOOST

SLEEP

BOOST

BOOST OPERATION

With the V
amplifier are operated at higher supply voltages than the
amplifier’s high current output stage. +V
–V

(pin 5) are connected to the small signal circuitry of the

BOOST

amplifier. +V
current output stage. An additional 5V on the V
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 +V
pins must be strapped together as well as the –V
pins. The boost voltage pins must not be at a voltage lower than

pins.

the V

S

feature the small signal stages of the

BOOST

(pin 9) and

BOOST

(pin 8) and –VS (pin 6) are connected to the high

S

BOOST

BOOST

BOOST

pins is

and +V

and –V

COMPENSATION

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 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 C

and RC for the application.

C

).

S
S

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. I DECEMBER 1997 © 1997 Apex Microtechnology Corp.