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Low Cost, 1.1MHz, 2.5A, 40V Power Amplifier in 3 Package Styles0 pages
PA75
PA75
PA75
Dual Power Operational Amplifiers
FEATURES
• RoHS COMPLIANT
•t LOW COST
• WIDE BANDWIDTH - 1.1 Mhz
• HIGH OUTPUT CURRENT - 2.5A (Combined)
• 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
• IDEAL FOR SINGLE SUPPLY SYSTEMS
t 5V Peripherals, 12V Automotive, 28V Avionic
PACKAGING OPTIONS
7 PIN DDPAK
PACKAGE STYLE CC
7 PIN TO220
STAGGERED LEADS
PACKAGE STYLE CX
TYPICAL APPLICATION
Ref: APPLICATION NOTES 8, 20, 26
RI
• 7 TO-220 Plastic Package (PA75CD)
• 7 TO-220 with Staggered Lead Form (PA75CX)
• 7 DDPAK Surface Mount Package (PA75CC)
DESCRIPTION
+VS
1/2
PA75
EQUIVALENT SCHEMATIC ONE CHANNEL
PARALLEL CONNECTION
yields a single 2.5A amplifier
RF
RS
A
VO
2I
I
VIN
The amplifier design consists of dual power op amp on a single
monolithic die. Side B of the dual monolithic is configured as a
unity gain buffer to increase the current capability of the master
side A. The use of two PA75 amplifiers provides a cost-effective
solution to applications where multiple amplifiers are required or
a bridge configuration is needed. Very low harmonic distortion
of .02% THD and low IQ makes the PA75 a good solution for
power audio applications.
The PA75 is available in three standard package designs. The
surface mount version of the PA75, the PA75CC, is an industry
standard non-hermetic plastic 7-pin DDPAK. The through hole
version of the PA75, the PA75CD and PA75CX, are industry
standard non-hermetic plastic 7-pin TO-220 packages. The
PA75CX is staggered lead formed and offers standard 100 mil
spacing. This allows for easier PC board layout. (Please refer to
the CX lead form package drawing for dimension of the PA75CX).
The monolithic amplifier is directly attached to the metal tabs
of the PA75CC, PA75CD, and PA75CX. The metal tabs of the
packages are directly tied to -Vs.
7 PIN TO220
PACKAGE STYLE CD
1/2
PA75
LOAD
RS
B
I
–VS
Combining the power op amp (master channel A) and the
unity gain buffer (slave channel B) in a parallel connection
yields a single 2.5A amplifier. RI and RF can set up channel A
for the required gain for the overall circuit. Small values of RS
(sense resistors) are used on the outputs to improve current
sharing characteristics.The master amplifier can be configured
in inverting or non-inverting gain configurations.
EXTERNAL
CONNECTIONS
PA75CD
PA75CX
PA75CC
SUB
SUB
A
B
A
SUB
B
A
B
+Vs
CHANNEL A
CHANNEL B
-Vs
www.apexanalog.com
PA75U
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
OUT AMP A
-IN AMP A
+IN AMP A
-VS
+IN AMP B
+VS
OUT AMP B
OUT
THERMAL
PROTECT
OUT AMP A
-IN AMP A
+IN AMP A
-VS
+IN AMP B
+VS
OUT AMP B
+IN
-IN
OUT AMP A
-IN AMP A
+IN AMP A
-VS
+IN AMP B
+VS
OUT AMP B
I BIAS
MONITOR
OCT 2012
1
PA75U REVH
