Apex PA05A, PA05 Datasheet

MICROTECHNOLOGY

POWER OPERATIONAL AMPLIFIERS

PA05 • PA05A

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

FEA TURES

• 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 EK04

APPLICATIONS

• LINEAR AND ROTARY MOTOR DRIVES

• SONAR TRANSDUCER DRIVER

• YOKE/MAGNETIC FIELD EXCITATION

• PROGRAMMABLE POWER SUPPLIES TO ±45V

• AUDIO UP TO 500W

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.

PA05A

∆

USA BeO

TE949311

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”.

TYPICAL APPLICATION

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.

R

f

CONTROL

LOGIC

ULTRA-

SONIC
DRIVE

R

i

1

12

7

R

11

CL

TRANSFORMER

TUNED

2

PA05

10

EQUIVALENT SCHEMATIC

SHUTDOWN
12

9

+V

BOOST

Q1

Q12 Q13

Q16

–IN

1

D19

+IN

2

Q17

D20

Q30

D1

4

Q8

COMP

3

D27
D31

D6
D9

Q10

Q22

Q25

Q33

Q4

Q14

BIAS

Q24

+Vs

D5

Q21

Q18

8

Q5
OUT

I

LIM

I

LIM

Q29

7

11
10

EXTERNAL CONNECTIONS

–INPUT
+INPUT

COMP

R

C

C

COMP

–V

BOOST

–SUPPLY

*

Gain C
1 470pF 120Ω
>3 220pF 120Ω

1
2
3

TOP

C

TOP

VIEW

VIEW

4
5
6

PHASE COMPENSATION

SHUTDOWN

12
11
10

CURRENT LIMIT
CURRENT LIMIT

9
8
7

+V

BOOST

*

+SUPPLY

OUTPUT

C

R

C

≥10 82pF 120Ω

–V

BOOST

5

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

D4

C

RATED FOR FULL SUPPLY VOLTAGE

6

–Vs

C

*See

BOOST OPERATION

paragraph.

P A05 • P A05A

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

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

S

100V

OUTPUT CURRENT, continuous within SOA 30A
POWER DISSIPATION, internal 250W
INPUT VOLTAGE, differential ±20V
INPUT VOLTAGE, common mode ±V
TEMPERATURE, pin solder - 10s 300°C
TEMPERATURE, junction

2

B

175°C
TEMPERATURE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –55 to +125°C

SPECIFICATIONS

PARAMETER TEST CONDITIONS

PA05

1

MIN TYP MAX MIN TYP MAX UNITS

PA05A

INPUT

OFFSET VOLTAGE, initial 5 10 2 5 mV
OFFSET VOLTAGE, vs. temperature Full temperature range 20 50 10 30 µV/°C
OFFSET VOLTAGE, vs. supply 10 30 * * 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 90 100 * * dB
INPUT NOISE 100KHz BW, RS = 1KΩ 10 * µVrms

GAIN

OPEN LOOP, @ 15Hz Full temperature range, CC = 82pF 94 102 * * dB
GAIN BANDWIDTH PRODUCT RL = 10Ω 3 * MHz
POWER BANDWIDTH RL = 4Ω, VO = 80V

CC = 82pF, RC = 120Ω

, AV = –10 400 * kHz

P-P

PHASE MARGIN Full temperature range, CC = 470pF 60 * °

OUTPUT

VOLTAGE SWING IO = 20A ±VS–9.5 ±VS–8.7 * * V
VOLTAGE SWING V
CURRENT, peak 30 * A

= Vs + 5V, IO = 30A ±VS–5.8 ±VS–5.0 * * V

BOOST

SETTLING TIME to .1% AV = +1, 10V step, RL = 4Ω 2.5 * µs
SLEW RATE AV = –10, CC = 82pF, RC = 120Ω 80 100 * V/µs
CAPACITIVE LOAD Full temperature range, AV = +1 2.2 * n F
RESISTANCE IO = 0, No load, 2MHz 5 * Ω

IO = 1A, 2MHz 2 * Ω

POWER SUPPLY

VOLTAGE Full temperature range ±15 ±45 ±50 * * * V
CURRENT, quiescent, boost supply 46 56 * * mA
CURRENT, quiescent, total 90 120 * * mA
CURRENT, quiescent, total, shutdown 46 56 * * mA

THERMAL

RESISTANCE, AC, junction to case
RESISTANCE, DC, junction to case Full temperature range, F<60Hz .4 .5 * * °C/W
RESISTANCE, junction to air

3

Full temperature range, F>60Hz .3 .4 * * °C/W

4

Full temperature range 12 * °C/W

TEMPERATURE RANGE, case Meets full range specification –25 85 * * °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. ±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 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: [phone]

TYPICAL PERFORMANCE
GRAPHS

P A05 • PA05A

250

POWER DERATING

200

150

100

50

0

0 25 50 75 100 125 150

INTERNAL POWER DISSIPATION, P(W)

CASE TEMPERATURE, T(°C)

SMALL SIGNAL RESPONSE

100

R = 8

Ω

L

80

R = 120

Ω

C

CC = 82pf

60

CC = 220pf

40

CC = 470pf

20

OPEN LOOP GAIN, A(dB)

0

100 10M

10 1K 10K 100K 1M

FREQUENCY, f (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)

PHASE RESPONSE

CC = 82pf

–45

–90

Φ

CC = 470pf

–135

PHASE, (°)

–180

R = 8

L

R = 120

–225

C

100 10M10 1K 10K 100K 1M

CC = 220pf

Ω

Ω

CC = 470pf

CC = 220pf

CC = 82pf

FREQUENCY, f (Hz)

SLEW RATE VS. COMP.

100

80

60

40

SLEW RATE, SR (V/µs)

20

100 200

EXT. COMPENSATION CAPACITOR C (pF)

OUTPUT VOLTAGE SWING

(V)

O

12

–V

S

10

8

6

4

2

0 5 20 30

OUTPUT CURRENT, I (A)

VOLTAGE DROP FROM SUPPLY, V

300 400 500

S

BOOST

V = V

+ 5V

V = V

15

10 25

S

BOOST

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 = 2

Ω

L

C = 82pF, R = 120

C

±Vs = 31V

.02
.01

.005

DISTORTION, THD (%)

.002
.001

30 300 30K

100 1K 3K 10K

FREQUENCY, f (Hz)

10K 100K

C

P = 1W

O

Ω

O

P = 300W

O

P = 200W

7.5

PULSE RESPONSE

A = +1

5

O

2.5

0

–2.5

–5

OUTPUT VOLTAGE, V (V)

1M100 1K 0 10 15

–7.5

TIME, t (µs)

QUIESCENT CURRENT

Q

1.2

1.1

1.0

.9

.8

NORMALIZED QUIESCENT CURRENT, I (X)

40 60 80

20 100

TOTAL SUPPLY VOLTAGE, V (V)

C = 470pF

CV

25

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)

50

C

POWER RESPONSE

100

)

60

PP

40

O

20

C = 470pF

C

10

6
4

OUTPUT VOLTAGE, V (V

2

100K

40K

FREQUENCY, f (Hz)

C = 220pF

C

.4M

C = 82pF

C

1M

4M

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

P A05 • PA05A

(V)

OPERATING

CONSIDERATIONS

GENERAL

Please read the
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

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.

General Operating Considerations

Accessory and Package Mechanical

section,

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:

R

INPUT

FIGURE 1. CURRENT LIMIT

10

i

1

PA05

2

CL

R

f

11

7

CL

I

= .7/R

LIMIT

R

R

CL

P

R

L

CL

SAFE OPERATING AREA (SOA)

The MOSFET output stage of this power operational ampli-

fier 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.

30

15
12

9
6

3

1.5

OUTPUT CURRENT (A)

1.2
.9

.6

.3

1

2510

34 20

SUPPLY TO OUTPUT DIFFERENTIAL

DC Tc = 125°C

t = 200ms

DC Tc = 25°C

DC Tc = 85°C

30

40 50

100

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 +V

. See Figure

S

2 for suggested circuits.

–LOGIC

A

–LOGIC

B

FIGURE 2. SHUTDOWN OPERATION

470Ω

K1

Q1

12

SHUTDOWN

12

SHUTDOWN

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.

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

BOOST

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

pins.

S

feature, the small signal stages of the

BOOST

(pin 9), and

BOOST

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

S

BOOST

and +V

BOOST

and –V

BOOST

pins

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 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 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.

PA05U REV. F DECEMBER 1997 © 1997 Apex Microtechnology Corp.