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PA60 PA60
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
R2 R3 R4 R1 INPUT 0-10V A 1/2 PA60 + M B 1/2 PA60 + _ _ R5 +28V
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
R6
DESCRIPTION
The amplifier design is a dual power op amp on a single monolithic die. This approach provides a cost-effective solution to applications where multiple amplifiers are required or a bridge configuration 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.
+V I BIA M NIT R
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.
-IN
+IN UT T RMA PR T T
SUB
3 4 5 6 7 8 9
-V
1
2
SUB
SUB
10
FIGURE 3. External connections
Copyright (c) Cirrus Logic, Inc. 2009 (All Rights Reserved)
PA60U
http://www.cirrus.com
+IN(A) -IN(A) NC -VS OUT(A) -VS +VS OUT(B) -VS NC -IN(B) +IN(B)
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.
PA60EU
JUL 2009 1 APEX - PA60UREVH
11 12
A
B
+
-
+
PA60
ABSOLUTE MAXIMUM RATINGS
P r o d u c t I n n o v a t i o nF r o m
SUPPLY VOLTAGE, total OUTPUT CURRENT POWER DISSIPATION, internal (PA60EU, 1 amplifier) POWER DISSIPATION, internal (PA60EU, 2 amplifiers)4 INPUT VOLTAGE, differential INPUT VOLTAGE, common mode JUNCTION TEMPERATURE, max.1 TEMPERATURE, pin solder - 10 secs max. TEMP RANGE STORAGE OPERATING TEMP RANGE, case1
5V to 40V SOA 19.89W 31.82W Vs +Vs,-Vs-.5V 150C 220C -55C to 150C -40C to 125C
SPECIFICATIONS (PER AMPLIFIER)
PARAMETER 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 GAIN OPEN LOOP GAIN GAIN BANDWIDTH PRODUCT PHASE MARGIN POWER BANDWIDTH OUTPUT CURRENT, peak SLEW RATE VOLTAGE SWING VOLTAGE SWING HARMONIC DISTORTION POWER SUPPLY VOLTAGE, Vss3 CURRENT, quiescent total THERMAL RESISTANCE, junction to case DC, 1 amplifier DC, 2 amplifiers4 AC, 1 amplifier AC, 2 amplifiers4 RESISTANCE, junction to air Notes: TEST CONDITIONS1,2 MIN TYP 1 20 100 -Vs 60 60 50 90 90 68 22 100 1.4 65 13.6 1.5 Full temp range, IO = 100mA Full temp range, IO = 1A AV = 1, RL = 50, VO = .5VRMS, = 1kHz 1.0 |Vs| -1.1 |Vs| -1.8 1.4 |Vs| -0.8 |Vs| -1.4 .02 MAX 15 500 +Vs - 1.3 UNTS mV V/C nA V dB dB dB nV/Hz dB MHz C kHz A V/S V V %
Full temp range Full temp range Full temp range IOUT = 500mA, = 1kHz RS = 100, = 1 to 100kHz VO = 10V, RL = 2.0K = 100kHz, CL = 100pF, RL = 2.0K Full temp range, CL = 100pF, RL = 2K VO(P-P) = 28V
89 0.9
5
30 8
40 10
V mA
5.71 3.57 4.29 2.68 30
6.29 3.93 4.71 2.95
C/W C/W C/W C/W 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 =25C. 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. 5. If -VS is disconnected before +VS, a diode between -Vs and ground is recommended to avoid damage.
2
PA60U
P r o d u c t I n n o v a t i o nF r o m
PA60
BIAS CURRENT OFFSET VOLTAGE
3 2.5 2 1.5 1 0.5 0 -100 0 50 100 150 -50 CASE TEMPERATURE, TC (C)
ANORMALIZED BIAS CURRENT, IB (mA)
24
160
2.5 2 1.5 1 0.5 0 -0.5 -100
20 16 12 8 4
120 80 40 0 -40
-80 0 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 NORMALIZED QUIESCENT CURRENT, IQ (mA)
0 50 150 -50 100 CASE TEMPERATURE, TC (C)
PHASE MARGIN vs. OUTPUT LOAD CAPACITANCE
65
VOLTAGE GAIN & PHASE vs. FREQUENCY
VOLTAGE DROP FROM SUPPLY, (V)
60 90
NORMALIZWD OFFSET VOLTAGE, VOS (mV)
QUIESCENT CURRENT
TOTAL SUPPLY VOLTAGE, VS (V)
CASE TEMPERATURE, TC (C)
2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2
OUTPUT VOLTAGE SWING
PHASE MARGIN, O ()
45
20
110
35
0
120
PHASE, O ()
GAIN, A (dB)
55
40
100
25 20 04 08 12 16 00 OUTPUT LOAD CAPACITANCE, CL (nF) 10 8
-20
1
100 1K 10 FREQUENCY, (KHz)
130 10K
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 OUTPUT CURRENT, IO (A)
PULSE RESPONSE
+VS = +15V A V = +1 VIN = 10Vp
10 8
PULSE RESPONSE
+VS = +15V A V = +1 VIN = 10Vp
OUTPUT VOLTAGE, VO (V)
6 4 2 0 -2 -4 -6 -8 -10 0 -VS = -15V RL = 20 fIN = 20kHz
OUTPUT VOLTAGE, VO (V)
6 4 2 0 -2 -4 -6 -8 -10 0 -VS = -15V fIN = 1kHz
10
20
30 40 50 TIME, t (s)
60
70
200 400 600 800 1000 1200 1400 TIME, t (s)
PA60U
3
PA60
GENERAL
P r o d u c t I n n o v a t i o nF r o m
OUTPUT CURRENT FROM +VS or -VS, (A)
Please read Application Note 1 "General Operating Considerations" 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 power dissipation, heatsink selection; Apex's complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits.
10
SOA PA60EU
DC, TC = 25C (A+B) AMPLIFIERS LOADED (A) AMPLIFIER LOADED
1
STABILITY CONSIDERATIONS
All monolithic power op amps use output stage + topologies that present special stability problems. - C SN This is primarily due to 0.01F non-complementary (both devices are NPN) output R SN stages with a mismatch in 10 gain and phase response for different polarities of output current. It is difficult for the op amp manufacturer FIGURE 4. R-C Snubber 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 = 10 and CSN = 0.01F. Please refer to Application Note 1 for further details.
DC, TC = 85C 0.1
1
10
100
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE, VS - VO, (V)
INTERNAL POWER DISSIPATION, P (W)
35 30 25 20 15 10 5 0 0
POWER DERATING
(A+B) AMPLIFIERS
(A) AMPLIFIER
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.
25 75 100 50 CASE TEMPERATURE, T C (C)
125
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 fixed terminals. 4. Strain relief must be provided if there is any probability of axial stress to the leads.
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 1C/W or greater.
4
PA60U

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