APEX PA62

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FEATURES
DESCRIPTION
The amplifier design is a dual power op amp on a single
monolithic die. The quad output PA62 combines two dual op
amp die in a single PSOP package. This approach provides
a cost-effective solution to applications where multiple amplifiers are required or a bridge configuration is needed. Four
independent amplifiers coupled with low quiescent current and
very low THD makes this an ideal low-distortion 4-channel
audio amplifier for applications such as laptops and computer
speakers.
The quad output PA62DK is available in a surface mount
20-pin PSOP, JEDEC MO-166-AB package. The heat slug
of the DK package is tied to -Vs.
Built-in thermal shutdown allows the devices to self-protect
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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.
FIGURE 3. External Connections
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• HALF AND FULL BRIDGE MOTOR DRIVERS
• AUDIO POWER AMPLIFIER
Stereo
- 11.3W RMS per amplifier
Bridge
- 22.6W RMS per two amplifiers
Two Bridges - 45.2W RMS per package
• 3 PHASE MOTOR DRIVER
3 Channels - 33.9W RMS per package
• IDEAL FOR SINGLE SUPPLY SYSTEMS
5V
- Peripherals
12V
- Automotive
28V
- Avionic
• PACKAGING OPTIONS
20-Pin PSOP, JEDEC MO-166-AB (PA62DK)
against thermal overloads. Care must be exercised to observe
the Safe Operating Area (SOA) curve and proper heatsinking
will ensure maximum reliability.
The wide common mode input range includes the negative rail, facilitating single supply applications. This makes it
possible to have a ground-based input driving a single supply
amplifier with ground acting as the second or bottom supply
of the amplifier.
FIGURE 2. Bi-directional speed control from a single supply
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APPLICATIONS
20-PIN PSOP
PACKAGE STYLE DK
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• 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
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FIGURE 1. Equivalent schematic (one channel)
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
1
PA62
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS (PER AMPLIFIER)
PARAMETER
SUPPLY VOLTAGE, total
OUTPUT CURRENT
POWER DISSIPATION, internal (1 amplifier)
POWER DISSIPATION, internal (2 amplifiers)4
POWER DISSIPATION, internal (3 amplifiers)4
POWER DISSIPATION, internal (4 amplifiers)4
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
JUNCTION TEMPERATURE, max1
TEMPERATURE, pin solder - 10 secs max.
TEMP RANGE STORAGE
OPERATING TEMP RANGE, case1
TEST CONDITIONS1,2
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
Full temp range
IOUT = 500mA, ƒ = 1kHz
RS = 100Ω, ƒ = 1 to 100kHz
GAIN
OPEN LOOP GAIN
GAIN BANDWIDTH PRODUCT
PHASE MARGIN
POWER BANDWIDTH
VO = ±10V, RL = 2.0KΩ
ƒ = 100kHz, CL = 100pF, RL = 2.0KΩ
Full temp range
VO(P-P) = 28V
OUTPUT
CURRENT, peak
SLEW RATE
VOLTAGE SWING
VOLTAGE SWING
HARMONIC DISTORTION
POWER SUPPLY
VOLTAGE, Vss3
CURRENT, quiescent +Vs (A/B)
CURRENT, quiescent +Vs (C/D)
CURRENT, quiescent total
THERMAL
RESISTANCE, junction to case
DC, 1 amplifier
DC, 2 amplifiers4
DC, 3 amplifiers4
DC, 4 amplifiers4
AC, 1 amplifier
AC, 2 amplifiers4
AC, 3 amplifiers4
AC, 4 amplifiers4
RESISTANCE, junction to air6
Notes
MIN
Full temp range
Full temp range
Full temp range, IO = 100mA
Full temp range, IO = 1A
AV = 1, RL = 50Ω,
VO = .5VRMS, ƒ = 1kHz
-Vs
60
60
50
89
5V to 40V
SOA
15.88W
24.21W
36.90W
45.20W
±Vs
+Vs,-Vs-.5V
150°C
220°C
-55°C to 150°C
-40°C to 125°C
TYP
MAX
UNTS
1
20
100
15
mV
µV/°C
nA
V
dB
dB
dB
nV/√Hz
500
+Vs
90
90
68
22
100
0.9
65
13.6
1.4
dB
MHz
°C
kHz
1.0
A
V/µS
V
V
%
30
8
8
16
40
10
10
20
V
mA
mA
mA
7.16
4.69
3.08
2.51
7.87
5.16
3.39
2.77
°C/W
°C/W
°C/W
°C/W
5.37
3.52
2.31
1.89
5.90
3.87
2.54
2.07
°C/W
°C/W
°C/W
°C/W
1.0
|Vs| -1.1
|Vs| -1.8
1.4
|Vs| -0.8
|Vs| -1.4
.02
5
25
°C/W
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, T C =25°C.
3. +VS and -VS denote the positive and negative rail respectively. VSS denotes total rail-to-rail supply.
4. Rating applies when power dissipation is equal in each of the amplifiers. Power and thermal ratings are based on two separate
dual monolithic power op-amps on one integrated copper heatslug. Amplifiers A and B are combined on one monolithic die while
amplifiers C and D are on the other.
5. If -VS is disconnected before +VS, a diode between -VS and ground is recommended to avoid damage.
6. Rating applies when the heatslug of the DK package is soldered to a minimum of 1 square inch foil area of a printed circuit
board.
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
2
PA62
TYPICAL PERFORMANCE
GRAPHS
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
3
PA62
GENERAL
CONSIDERATIONS
TYPICAL APPLICATION (CONT.)
SAFE OPERATING AREA (SOA)
The PA62 can be used in a three amplifier configuration for
a three phase inverter or motor as shown in Figure 4.
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
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FIGURE 4. 3 Phase Inverter
GENERAL
Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heatsinking, mounting,
SOA interpretation, and specification interpretation. Visit www.
apexmicrotech.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
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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 for the op amp manufacturer to
optimize compensation for all operating conditions.
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The PA62DK has a large exposed integrated copper heatslug
to which the monolithic is directly attached. The solder connection of the heatslug to a minimum of 1 square inch foil area of
the printed circuit board will result in thermal performance of
25°C/W junction to air rating of the PA62DK. Solder connection to an area of 1 to 2 square inches of foil is required for
minimal power applications
Where the PA62DK is used in higher power applications,
it is necessary to use surface mount techniques of heatsinking. Surface mount techniques include the use of a surface
mount fan in combination with a surface mount heatsink on
the backside of the FR4/ PC board with through hole thermal
vias. Other highly thermal conductive substrate board materials
are available for maximum heat sinking.
The Power Derating graph shown below assumes that the
power dissipation is equal in each of the amplifiers. Power and
thermal ratings are based on two separate dual monolithic
power op amps on one integrated copper heat slug. Amps A
and B are combined on one monolithic die while amps C and
D are combined on the other. This multi chip configuration
provides superior thermal performance by isolating each of
the dual amplifiers. When loading either of the dual amplifiers
it is possible to achieve better thermal performance by loading
any combination of amplifiers (A or B) + (C or D).
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MOUNTING PRECAUTIONS
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1. Always use a heat sink. Even unloaded the PA62DK can
dissipate up to .8 watts.
2. Avoid bending the leads. Such action can lead to internal
damage.
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This data
sheet has been carefullyCORPORATION
checked and is believed
to be NORTH
reliable, however,
no responsibility
is assumed for
possible inaccuracies
omissions.
All specificationsHOTLINE:
are subject to1change
notice.
APEX
MICROTECHNOLOGY
• 5980
SHANNON
ROAD • TUCSON,
ARIZONA
85741 •orUSA
• APPLICATIONS
(800)without
546-2739
4
PA62U REV C OCTOBER 2005 © 2005 Apex Microtechnology Corp.