P r o d u c t I n n o v a t i o n F r o m PA60
PA60U 1
FEATURES
• RoHS COMPLIANT
• LOW COST
• WIDE BANDWIDTH - 1.1 Mhz
• HIGH OUTPUT CURRENT - 1A per amplier
• 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 amplier design is a dual power op amp on a single
monolithic die. This approach provides a cost-effective solu-
tion to applications where multiple ampliers are required or a
bridge conguration is needed. Very low harmonic distortion
of 0.02% THD and low IQ makes the PA60 a good solution for
low power audio applications such as laptops and computer
speakers.
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.
FIGURE 2. Bi-directional speed control from a single supply
TYPICAL APPLICATION
R1 and R2 set up Amplier A as non-inverting. Amplier
B is set up as a unity gain inverter driven from the output of
Amplier A. Note that Amplier 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 Amplier A. Since this is also equivalent to the reference
node voltage, the output of Amplier B is the same resulting
in 0V across the motor. Inputs more positive than 5V result in
motor current ow from left to right (see Figure 2). Inputs less
than 5V drive the motor in the opposite direction.
The ampliers 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
INPUT
0-10V
A
M
B
R2 R3
R4
R5
R6
R1
1/2 PA60 1/2 PA60
+28V
+
_
+
_
OUT
+Vs
-IN +IN
-Vs
I BIAS
MONITOR
THERMAL
PROTECT
12-PIN SIP
PACKAGE STYLE EU
+IN(A)
-IN(A)
NC
-VS
OUT(A)
-VS
+VS
OUT(B)
-VS
NC
-IN(B)
+IN(B)
PA60EU
+
-
A
-
+
B
SUB
SUB SUB
1 2 3 4 5 6 7 8 9 10 11 12
High Voltage Power Operational Amplifiers
PA60
Product Innovation From
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
http://www.cirrus.com
JUL 2009
APEX - PA60UREVH
P r o d u c t I n n o v a t i o n F r o m
PA60
2 PA60U
PARAMETER TEST CONDITIONS1,2 MIN TYP MAX UNTS
INPUT
OFFSET VOLTAGE, initial 1 15 mV
OFFSET VOLTAGE, vs. temperature Full temp range 20 µV/°C
BIAS CURRENT, initial 100 500 nA
COMMON MODE RANGE Full temp range -Vs +Vs - 1.3 V
COMMON MODE REJECTION, DC 60 90 dB
POWER SUPPLY REJECTION Full temp range 60 90 dB
CHANNEL SEPARATION IOUT = 500mA, ƒ = 1kHz 50 68 dB
INPUT NOISE VOLTAGE RS = 100Ω, ƒ = 1 to 100kHz 22 nV/√Hz
GAIN
OPEN LOOP GAIN VO = ±10V, RL = 2.0KΩ 89 100 dB
GAIN BANDWIDTH PRODUCT ƒ = 100kHz, CL = 100pF, RL = 2.0KΩ 0.9 1.4 MHz
PHASE MARGIN Full temp range, CL = 100pF, RL = 2KΩ 65 °C
POWER BANDWIDTH VO(P-P) = 28V 13.6 kHz
OUTPUT
CURRENT, peak 1.5 A
SLEW RATE 1.0 1.4 V/µS
VOLTAGE SWING Full temp range, IO = 100mA |Vs| -1.1 |Vs| -0.8 V
VOLTAGE SWING Full temp range, IO = 1A |Vs| -1.8 |Vs| -1.4 V
HARMONIC DISTORTION AV = 1, RL = 50Ω, .02 %
VO = .5VRMS, ƒ = 1kHz
POWER SUPPLY
VOLTAGE, Vss3 5 30 40 V
CURRENT, quiescent total 8 10 mA
THERMAL
RESISTANCE, junction to case
DC, 1 amplier 5.71 6.29 °C/W
DC, 2 ampliers4 3.57 3.93 °C/W
AC, 1 amplier 4.29 4.71 °C/W
AC, 2 ampliers4 2.68 2.95 °C/W
RESISTANCE, junction to air 30 °C/W
ABSOLUTE MAXIMUM RATINGS
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: ±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 ampliers.
5. If -VS is disconnected before +VS, a diode between -Vs and ground is recommended to avoid damage.
SUPPLY VOLTAGE, total 5V to 40V
OUTPUT CURRENT SOA
POWER DISSIPATION, internal (PA60EU, 1 amplier) 19.89W
POWER DISSIPATION, internal (PA60EU, 2 ampliers)4 31.82W
INPUT VOLTAGE, differential ±Vs
INPUT VOLTAGE, common mode +Vs,-Vs-.5V
JUNCTION TEMPERATURE, max.1 150°C
TEMPERATURE, pin solder - 10 secs max. 220°C
TEMP RANGE STORAGE -55°C to 150°C
OPERATING TEMP RANGE, case1 -40°C to 125°C
SPECIFICATIONS (PER AMPLIFIER)
P r o d u c t I n n o v a t i o n F r o m PA60
PA60U 3
-50 0 50 100 150
-0.5
0.5
1.5
2.5
CASE TEMPERATURE, T
C
(°C)
ANORMALIZED BIAS CURRENT, I
B
(mA)
BIAS CURRENT
-50 0 50 100 150
0
1
2
3
CASE TEMPERATURE, T
C
(°C)
NORMALIZWD OFFSET VOLTAGE, V
OS
(mV)
OFFSET VOLTAGE
00 04 08 12 16
35
45
55
65
OUTPUT LOAD CAPACITANCE, C
L
(nF)
PHASE MARGIN, Ø (°)
PHASE MARGIN vs. OUTPUT LOAD CAPACITANCE
20
25
0
-20
20
40
60
110 100 1K 10K
90
100
110
120
130
VOLTAGE GAIN & PHASE vs. FREQUENCY
FREQUENCY, ƒ (KHz)
GAIN, A (dB)
PHASE, Ø (°)
PULSE RESPONSE
TIME, t (μs)
OUTPUT VOLTAGE, V
O
(V)
010 20 30 40 50
-4
8
4
0
-8
-2
10
6
2
-6
-10
60 70
+V
S
= +15V
A
V
= +1
V
IN
= 10Vp
-V
S
= -15V
R
L
= 20Ω
f
IN
= 20kHz
QUIESCENT CURRENT
0.5 0.7 0.9 1.1 1.3
NORMALIZED QUIESCENT CURRENT, I
Q
(mA)
TOTAL SUPPLY VOLTAGE, V
S
(V)
20
16
12
0
4
8
-80
-40
0
40
80
120
CASE TEMPERATURE, T
C
(C)
OUTPUT VOLTAGE SWING
OUTPUT CURRENT, I
O
(A)
VOLTAGE DROP FROM SUPPLY, (V)
0.1 0.2 0.3 0.4 0.5 0.6
0.6
1.8
1.4
1
0.2
0.8
2
1.6
1.2
0.4
0
0.7 1.0
0.9
0.8
PULSE RESPONSE
TIME, t (μs)
OUTPUT VOLTAGE, V
O
(V)
0200 400 600 800 1000
0
1200 1400
+V
S
= +15V
A
V
= +1
V
IN
= 10Vp
-V
S
= -15V
f
IN
= 1kHz
-4
8
4
-8
-2
10
6
2
-6
-10
-100
0.5
1.5
2.5
-100
0
1
2
1.5 1.7 1.9
16024
P r o d u c t I n n o v a t i o n F r o m
PA60
4 PA60U
GENERAL
Please read Application Note 1 "General Operating Consider-
ations" which covers stability, supplies, heatsinking, mounting,
SOA interpretation, and specication 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
for the op amp manufacturer
to optimize compensation
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,RSN = 10Ω and CSN = 0.01µF. Please refer to Ap-
plication 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.
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 xed terminals.
4. Strain relief must be provided if there is any probability of
axial stress to the leads.
1 10 100
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE, V
S
- V
O
, (V)
0.1
1
10
OUTPUT CURRENT FROM +V
S
or -V
S
, (A)
SOA PA60EU
DC, T
C
= 25°C
DC, T
C
= 85°C
(A) AMPLIFIER LOADED
(A+B) AMPLIFIERS LOADED
POWER DERATING
CASE TEMPERATURE, T C (C)
INTERNAL POWER DISSIPATION, P (W)
0 25 50 75 100 125
25
20
15
10
5
(A) AMPLIFIER
30 (A+B) AMPLIFIERS
0
35
–
+
C
SN
0.01µF
R
SN
10Ω
FIGURE 4. R-C Snubber