datasheet for PA60DK by Apex Microtechnology

+Vs

-IN

High Voltage Power Operational Amplifiers

FEATURES

• RoHS COMPLIANT

• LOW COST

• WIDE BANDWIDTH - 1.1 Mhz

• HIGH OUTPUT CURRENT - 1A per ampliier

• WIDE COMMON MODE RANGE Includes negative supply

• WIDE SUPPLY VOLTAGE RANGE Single supply: 5V to

40V Split supplies: ± 2.5V to ± 20V

• LOW QUIESCIENT CURRENT

• VERY LOW DISTORTION

APPLICATIONS

• HALF AND FULL BRIDGE MOTOR DRIVERS

• AUDIO POWER AMPLIFIER

Stereo - 15.91W RMS per channel

Bridge - 31.82W RMS per 2 channels

• IDEAL FOR SINGLE SUPPLY SYSTEMS

5V - Peripherals

12V - Automotive

28V - Avionic

DESCRIPTION

The ampliier design is a dual power op amp on a single monolithic die. This approach provides a cost-effective solution to applications where multiple ampliiers are required or a bridge coniguration is needed. Very low harmonic distortion of 0.02% THD and low I

Q

makes the PA60 a good solution for low power audio applications such as laptops and computer speakers.

+IN

I BIAS

MONITOR

THERMAL

PROTECT

OUT

R1

INPUT

0-10V

R2

_

+

A

1/2 PA60 M

12-PIN SIP

PACKAGE STYLE EU

R3

R4

B

_

1/2 PA60

+

+28V

R5

R6

FIGURE 2. Bi-directional speed control from a single supply

TYPICAL APPLICATION

R1 and R2 set up Ampliier A as non-inverting. Ampliier

B is set up as a unity gain inverter driven from the output of

Ampliier A. Note that Ampliier B inverts the signals about the reference node, which is set at mid-supply by R5 and

R6. When the command input is midrange, so is the output of Ampliier A. Since this is also equivalent to the reference node voltage, the output of Ampliier B is the same resulting in 0V across the motor. Inputs more positive than 5V result in motor current low from left to right (see Figure 2). Inputs less than 5V drive the motor in the opposite direction.

The ampliiers are especially well-suited for applications such as this. The extended common mode range allows command inputs as low as 0V. The output swing lets it drive within 2V of the supply at an output of 1A. This means that a command input that ranges from 0 to 10V will drive a 24V motor from full scale CCW to full scale CW at ±1A.

-Vs

FIGURE 1. Equivalent schematic (one channel)

The dual output PA60EU, is available in a 12-Pin Molded

Plastic SIP with standard 100 mil spacing. The heat tab of EU package is tied to -VS.

PA60U http://www.cirrus.com

+

- A

+

B -

SUB

SUB SUB

1 2 3 4 5 6 7 8 9 10 11 12

PA60EU

FIGURE 3. External connections

Copyright © Cirrus Logic, Inc. 2009

(All Rights Reserved)

JUL 2009

1

APEX - PA60UREVH

PA60

P r o d u c t I n n o v a t i o n F r o m

ABSOLUTE MAXIMUM RATINGS

SUPPLY VOLTAGE, total

OUTPUT CURRENT

POWER DISSIPATION, internal (PA60EU, 1 ampliier)

POWER DISSIPATION, internal (PA60EU, 2 ampliiers) 4

INPUT VOLTAGE, differential

INPUT VOLTAGE, common mode

JUNCTION TEMPERATURE, max.

1

TEMPERATURE, pin solder - 10 secs max.

TEMP RANGE STORAGE

OPERATING TEMP RANGE, case 1

5V to 40V

SOA

19.89W

31.82W

±Vs

+Vs,-Vs-.5V

150°C

220°C

-55°C to 150°C

-40°C to 125°C

SPECIFICATIONS (PER AMPLIFIER)

PARAMETER TEST CONDITIONS 1,2

INPUT

OFFSET VOLTAGE, initial

OFFSET VOLTAGE, vs. temperature

BIAS CURRENT, initial

COMMON MODE RANGE

COMMON MODE REJECTION, DC

POWER SUPPLY REJECTION

CHANNEL SEPARATION

INPUT NOISE VOLTAGE

GAIN

OPEN LOOP GAIN

GAIN BANDWIDTH PRODUCT

PHASE MARGIN

POWER BANDWIDTH

OUTPUT

CURRENT, peak

SLEW RATE

VOLTAGE SWING

VOLTAGE SWING

HARMONIC DISTORTION

POWER SUPPLY

VOLTAGE, Vss 3

CURRENT, quiescent total

THERMAL

RESISTANCE, junction to case

DC, 1 ampliier

DC, 2 ampliiers 4

AC, 1 ampliier

AC, 2 ampliiers 4

RESISTANCE, junction to air

Full temp range

Full temp range

Full temp range

I

OUT

= 500mA, ƒ = 1kHz

R

S

= 100Ω, ƒ = 1 to 100kHz

V

O

= ±10V, R

L

= 2.0KΩ

ƒ = 100kHz, C

L

= 100pF, R

L

= 2.0KΩ

Full temp range, C

L

= 100pF, R

L

= 2KΩ

V

O

(P-P) = 28V

Full temp range, I

O

Full temp range, I

O

A

V

V

O

= 1, R

L

= 50Ω,

= 100mA

= 1A

= .5VRMS, ƒ = 1kHz

MIN

-Vs

60

60

50

89

0.9

1.0

|Vs| -1.1

|Vs| -1.8

5

TYP

1

20

100

90

90

68

22

100

1.4

65

13.6

1.4

|Vs| -0.8

|Vs| -1.4

.02

30

8

MAX

15

500

+Vs - 1.3

1.5

40

10

UNTS

mV

µV/°C

nA

V

dB

dB

dB nV/√Hz

dB

MHz

°C

kHz

A

V/µS

V

V

%

V

mA

5.71

3.57

4.29

2.68

30

6.29

3.93

4.71

2.95

°C/W

°C/W

°C/W

°C/W

°C/W

Notes: 1. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF.

2. Unless otherwise noted, the following conditions apply: ±V

3. +V

S

and -V

S

S

= ±15V, T

C

denote the positive and negative rail respectively. V

SS

=25°C.

denotes total rail-to-rail supply.

4. Rating applies when power dissipation is equal in each of the ampliiers.

5. If -V

S

is disconnected before +V

S

, a diode between -V

S

and ground is recommended to avoid damage.

2 PA60U

P r o d u c t I n n o v a t i o n F r o m

PA60

24

QUIESCENT CURRENT

160

12

8

20

16

40

0

120

80

4 -40

0

0.5 0.7 0.9 1.1 1.3

1.5 1.7 1.9

NORMALIZED QUIESCENT CURRENT, I

Q

-80

(mA)

PHASE MARGIN vs. OUTPUT LOAD CAPACITANCE

65 60

BIAS CURRENT

2.5

2

1.5

1

0.5

0

-0.5

-100 -50 0 50 100 150

CASE TEMPERATURE, T

C

(°C)

VOLTAGE GAIN & PHASE vs. FREQUENCY

90

55 100 40

20 110 45

35

25

00 04 08 12 16

OUTPUT LOAD CAPACITANCE, C

20

L

(nF)

PULSE RESPONSE

10

8

6

4

2

+V

V

S

A

V

IN

= +15V

= +1

= 10Vp

0

-2

-4

-6

-8 f

-V

S

= -15V

R

IN

L

= 20

= 20kHz

-10

0 10 20 30 40 50

TIME, t (μs)

60 70

0 120

-20

1 10 100 1K

FREQUENCY, ƒ (KHz)

130

10K

PULSE RESPONSE

10

8

6

4

2

+V

V

IN

S

= +15V

A

V

= +1

= 10Vp

0

-2

-4

-V

S f

IN

= -15V

= 1kHz

-6

-8

-10

0 200 400 600 800 1000

TIME, t (μs)

1200 1400

OFFSET VOLTAGE

3

2.5

2

1.5

1

0.5

0

-100 -50 0 50 100

CASE TEMPERATURE, T

C

(°C)

150

OUTPUT VOLTAGE SWING

2

1.8

1.6

1.4

1.2

1

0.8

0.6

0.4

0.2

0

0.1 0.2 0.3 0.4 0.5 0.6

0.7

OUTPUT CURRENT, I

0.8

O

(A)

0.9

1.0

PA60U 3

PA60

P r o d u c t I n n o v a t i o n F r o m

GENERAL

Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heatsinking, mounting,

SOA interpretation, and speciication interpretation. Visit www.

Cirrus.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, heatsink selection; Apex's complete Application Notes library; Technical

Seminar Workbook; and Evaluation Kits.

STABILITY CONSIDERATIONS

All monolithic power op amps use output stage topologies that present special stability problems.

This is primarily due to non-complementary (both devices are NPN) output stages with a mismatch in gain and phase response for different polarities of output current. It is difficult

+

–

C

SN

0.01µF

R

SN

1

0Ω for the op amp manufacturer to optimize compensation

FIGURE 4 . R-C Snubber for all operating conditions. For applications with load current exceeding 300mA, oscillation may appear. The oscillation may occur only with the output voltage swing at the negative or positive half cycle. Under most operating and load conditions acceptable stability can be achieved by providing a series RC snubber network connected from the output to ground (see

Figure 4). The recommended component values of the of the network are,R

SN

= 10Ω and C

SN

= 0.01µF. Please refer to Application Note 1 for further details.

SAFE OPERATING AREA (SOA)

The SOA curves combine the effect of all limits for this power op amp. For a given application, the direction and magnitude of the output current should be calculated or measured and checked against the SOA curves. This is simple for resistive loads but more complex for reactive and EMF generating loads.

The following guidelines may save extensive analytical efforts.

THERMAL CONSIDERATIONS

The PA60EU has a large exposed copper heat tab to which the monolithic is directly attached. The PA60EU may require a thermal washer, which is electrically insulating since the tab is directly tied to -VS. This can result in a thermal impedance

RCS of up to 1˚C/W or greater.

10

SOA PA60EU

(A+B) AMPLIFIERS LOADED

1

(A) AMPLIFIER LOADED

DC, T

C

= 25°C

DC, T

C

= 85°C

0.1

1 10 100

SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE, V

S

- V

O

, (V)

POWER DERATING

35

(A+B) AMPLIFIERS

30

25

20

15

10

(A) AMPLIFIER

5

0

0 25 50 75

CASE TEMPERATURE, T

100

C

(C)

125

MOUNTING PRECAUTIONS

1. Always use a heat sink. Even unloaded the PA60EU can dissipate up to .4 watts.

2. Avoid bending the leads. Such action can lead to internal damage.

3. Always fasten the tab of the EU package to the heat sink before the leads are soldered to ixed terminals.

4. Strain relief must be provided if there is any probability of axial stress to the leads.

4 PA60U