PA76A Cirrus Logic Inc, PA76A Datasheet

PA76A

Manufacturer Part Number

PA76A

Description

IC PWR AMP DUAL 40V 3A 8PIN TO3

Manufacturer

Cirrus Logic Inc

Series

Apex Precision Power™r

Datasheet

1.PA76.pdf (5 pages)

Specifications of PA76A

Amplifier Type

Power

Number Of Circuits

Slew Rate

1.4 V/µs

Gain Bandwidth Product

1.4MHz

Current - Input Bias

100nA

Voltage - Input Offset

500µV

Current - Supply

18mA

Current - Output / Channel

Voltage - Supply, Single/dual (±)

5 V ~ 40 V, ±2.5 V ~ 20 V

Operating Temperature

-25°C ~ 85°C

Mounting Type

Through Hole

Package / Case

TO-3-8

Number Of Channels

Voltage Gain Db

100 dB

Common Mode Rejection Ratio (min)

60 dB

Input Offset Voltage

7 mV

Operating Supply Voltage

9 V, 12 V, 15 V, 18 V

Maximum Operating Temperature

+ 85 C

Mounting Style

Through Hole

Maximum Dual Supply Voltage

+/- 20 V

Minimum Operating Temperature

- 25 C

Lead Free Status / RoHS Status

Contains lead / RoHS compliant by exemption

Output Type

-3db Bandwidth

Lead Free Status / Rohs Status

Details

Other names

598-1350

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

PA76A

Manufacturer:

SEMTECH

Quantity:

451 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

PA76A

Manufacturer:

APEX

Quantity:

20 000

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PA74-76U

FEATURES

• LOW COST

• WIDE COMMON MODE RANGE —

• WIDE SUPPLY VOLTAGE RANGE

• HIGH EFFICIENCY — |Vs–2.2V| at 2.5A typ

• HIGH OUTPUT CURRENT — 3A

• LOW DISTORTION

APPLICATIONS

• HALF & FULL BRIDGE MOTOR DRIVERS

• AUDIO POWER AMPLIFIER

• IDEAL FOR SINGLE SUPPLY SYSTEMS

DESCRIPTION

stages to achieve the desired input and output characteristics

of the PA74 and PA76. The input stage utilizes a dual power op

amp on a single chip monolithic that drives the output stages.

The output stages are configured in a non inverting unity gain

buffer configuration. The output stages of the amplifier are also

compensated for stability. The PA74 and PA76 dual amplifiers are

designed with both monolithic and hybrid technologies providing

a cost effective solution for applications requiring multiple ampli-

fiers per board or bridge mode configurations. Both amplifiers

are internally compensated but are not recommended for use

as unity gain followers.

film resistors, ceramic capacitors and monolithic amplifiers to

maximize reliability and power handling capability, minimize size

and give top performance. Ultrasonically bonded aluminum wires

provide reliable interconnections at all operating temperatures.

The 8-Pin TO-3 package is hermetically sealed and electrically

isolated. The use of compressible isolation washers voids the

warranty.

EQUIVALENT SCHEMATIC

-IN

-V

The amplifier design consists of dual monolithic input and output

This dual hybrid circuit utilizes a beryllia (BeO) substrate, thick

http://www.cirrus.com

Includes negative supply

Single supply: 5V to 40V

Split supplies: ±2.5V to ±20V

STEREO — 30W RMS per channel

BRIDGE — 60W RMS per package

5V — Peripherals, 12V — Automotive

28V — Avionic

PA74, PA76, PA74A, PA76A

+IN

Power Dual Operational Amplifiers

P r o d u c t

I n n o v a t i o n

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

F r o m

MONITOR

THERMAL

PROTECT

I BIAS

ONE CHANNEL

CURRENT

GAIN

CURRENT

GAIN

OUT

TYPICAL APPLICATION

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

of amp A. Note that amp B inverts signals about the reference

node, which is set at mid-supply (14V) by R5 and R6. When

the command input is 5V, the output of amp A is 14V. Since

this is equal to the reference node voltage, the output of amp

B is also 14V, resulting in 0V across the motor. Inputs more

positive than 5V result in motor current flow from left to right

(see Figure 1). Inputs less positive than 5V drive the motor in

the opposite direction.

The extended common mode range allows command inputs

as low as 0V. Its superior output swing abilities let it drive

within 2V of supply at an output current of 2A. This means

that a command input that ranges from 0.714V to 9.286V will

drive a 24V motor from full scale CCW to full scale CW at up

to ±2A. A single power op amp with an output swing capability

of Vs –6 would require ±30V supplies and would be required to

swing 48V p-p at twice the speed to deliver an equivalent drive.

EXTERNAL CONNECTIONS (TOp viEws)

PA74

+IN, A

COMMAND

+IN, B

R1 and R2 set up amplifier A in a non-inverting gain of 2.8.

The amplifiers are especially well-suited for this application.

INPUT

0/10V

–IN, A

–IN, B

PA74/PA76 • PA74A/76A

FIGURE 1: BIDIRECTIONAL

SPEED CONTROL FROM A

SINGLE SUPPLY.

+28V

–V

1/2 PA74

OUT, A

PA74/76 • PA74A/76A

OUT, B

PA76

APEX − PA74-76UREVE

OUT, A

–IN, A

10K

1/2 PA74

+IN, A

–V

PACKAGE STYLE CE

– +

10K

+IN, B

8-PIN TO-3

MAY 2009

10K

–

OUT, B

+28V

–IN, B

Related parts for PA76A

PA76A Summary of contents

Page 1

... PA74, PA76, PA74A, PA76A Power Dual Operational Amplifiers FEATURES • LOW COST • WIDE COMMON MODE RANGE — Includes negative supply • WIDE SUPPLY VOLTAGE RANGE Single supply 40V Split supplies: ±2.5V to ±20V • HIGH EFFICIENCY — |Vs–2.2V| at 2.5A typ • HIGH OUTPUT CURRENT — 3A • LOW DISTORTION APPLICATIONS • HALF & FULL BRIDGE MOTOR DRIVERS • AUDIO POWER AMPLIFIER STEREO — 30W RMS per channel BRIDGE — ...

Page 2

... TEMPERATURE RANGE, case Meets full range specifications NOTES: * The specification of PA74A/PA76A is identical to the specification for PA74/PA76 in applicable column to the left. 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: ±VS = ±15V 25°C. ...

Page 3

NORMALIZED QUIESCENT CURRENT vs. CASE TEMPERATURE 2.0 1.8 1.5 1.4 1.2 1.0 0.8 0.6 0.4 -80 - ...

Page 4

PA74/76 • PA74A/76A GENERAL Please read Application Note 1 "General Operating Consider- ations" which covers stability, supplies, heatsinking, mounting, SOA interpretation, and specification interpretation. Visit www. Cirrus.com for design tools that help automate tasks such as calculations for stability, internal ...

Page 5

ContACting CiRRUs LogiC sUPPoRt For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North ...

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