PA60 Datasheet, PDF (1/4 Pages) Cirrus Logic – HIGH VOLTAGE POWER OPERATIONAL AMPLIFIERS

P r o d u c t IInnnnoovvaa t i o n FFrroomm
PAP6A600
High Voltage Power Operational Amplifiers
FEATURES
• RoHS COMPLIANT
• LOW COST
• WIDE BANDWIDTH - 1.1 Mhz
• HIGH OUTPUT CURRENT - 1A per amplifier
• 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
12-pin SIP
PACKAGE STYLE EU
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
R2
R3
R4
+28V
R1
_
_
A
1/2 PA60
M
B
1/2 PA60
R5
INPUT +
+
0-10V
R6
DESCRIPTION
The amplifier design is a dual power op amp on a single
monolithic die. This approach provides a cost-effective solu-
tion to applications where multiple amplifiers are required or a
bridge configuration 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.
+Vs
I BIAS
MONITOR
-IN
+IN
THERMAL
PROTECT
OUT
FIGURE 2. Bi-directional speed control from a single supply
TYPICAL APPLICATION
R1 and R2 set up Amplifier A as non-inverting. Amplifier
B is set up as a unity gain inverter driven from the output of
Amplifier A. Note that Amplifier 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 Amplifier A. Since this is also equivalent to the reference
node voltage, the output of Amplifier B is the same resulting
in 0V across the motor. Inputs more positive than 5V result in
motor current flow from left to right (see Figure 2). Inputs less
than 5V drive the motor in the opposite direction.
The amplifiers 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.
+
A
B-
SUB
SUB
SUB
1 2 3 4 5 6 7 8 9 10 11 12
PA60EU
FIGURE 3. External connections
PA60_hU_{ttp://www.cirrus.com}
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
JUL 2009₁
APEX - PA60UREVH