View PA46_1293417.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER
PA46
MICROTECHNOLOGY
HTTP://WWW.APEXMICROTECH.COM
(800) 546-APEX
(800) 546-2739
FEATURES
* * * * * * MONOLITHIC MOS TECHNOLOGY PROGRAMMABLE IQ (5 or 50 mA MAX) LOW COST HIGH VOLTAGE OPERATION--150V HIGH SLEW RATE--27V/s HIGH POWER--5A, 75W DISSIPATION
APPLICATIONS
* * * * MAGNETIC DEFLECTION PA AUDIO MOTOR DRIVE NOISE CANCELLATION
DESCRIPTION
The PA46 is a high power monolithic MOSFET operational amplifier that achieves performance levels unavailable even in many hybrid amplifier designs. Inputs are protected from excessive common mode and differential mode voltages as well as static discharge. The safe operating area (SOA) has no second breakdown limitations and can be observed with all type loads by choosing an appropriate current limiting resistor. External compensation provides the user flexibility in choosing optimum gain and bandwidth for the application. Class C operation with resulting low quiescent current is pin programmable. A shutdown input turns off the output stage. This circuit utilizes a beryllia oxide (BeO) substrate to minimize thermal resistance. The 10-pin power SIP package is electrically isolated.
TYPICAL APPLICATION
+80 RC
6 2 8 9
CC RCL CF YOKE -20 RD RF
VI RI
1
PA46
10 4
5
2.5A 7Sec Retrace Horizontal Deflection Coil Amplifiers
RS
EQUIVALENT SCHEMATIC
6 +VS D1 Q24 3 SHDN Q2 Q5 Q6 Q7 Q3 Q8 D2 D4 -IN 1 2 +IN Q20 -VS 4 Q21 D7 D5 Q11 Q12 CC1 8 9 CC2 D3 Q13 Q14 Q15 Q16 Q17 Q19 7 IQ Q9 Q10 OUTPUT DRIVE 5
Horizontal deflection amplifiers require both high speed and low distortion. The speed at which current can be changed in a deflection coil is a function of the voltage available from the op amp. In this application an 80 volt power supply is used for the retrace polarity to provide a 7 Sec retrace time, half of which is required for amplifier slewing. This circuit can perform 15.75 KHz deflection in up to 50H coils at up to 5A p-p.
EXTERNAL CONNECTIONS
RCL RC 1 -IN 2 3 4 5 6 7 IQ 8 CC1
Package: SIP02
OUTPUT
10 CURRENT SENSE
CC 9 CC2 10 ILIM
+IN SHDN -VS OUT +VS
CC is NPO rated for full suppy voltage. Phase Compensation RC Gain CC 10 10pF 1K 1 68pF 1K
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
PA46
ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
SUPPLY VOLTAGE, +VS to -VS OUTPUT CURRENT, continuous within SOA POWER DISSIPATION, continuous @ TC = 25C INPUT VOLTAGE, differential INPUT VOLTAGE, common mode TEMPERATURE, pin solder - 10 sec TEMPERATURE, junction TEMPERATURE, storage TEMPERATURE RANGE, powered (case)
150V 5A 75W 16 V VS 220C 150C -65 to +150C -55 to +125C
SPECIFICATIONS
PARAMETER INPUT OFFSET VOLTAGE, initial OFFSET VOLTAGE, vs. temperature OFFSET VOLTAGE, vs supply OFFSET VOLTAGE, vs time BIAS CURRENT, initial BIAS CURRENT, vs supply OFFSET CURRENT, initial INPUT IMPEDANCE, DC INPUT CAPACITANCE COMMON MODE, voltage range COMMON MODE REJECTION, DC NOISE, broad band GAIN OPEN LOOP at 15Hz GAIN BANDWIDTH PRODUCT @ 1MHz POWER BANDWIDTH PHASE MARGIN OUTPUT VOLTAGE SWING CURRENT, continuous SETTLING TIME to .1% SLEW RATE CAPACITIVE LOAD RESISTANCE , no load POWER SUPPLY VOLTAGE3 CURRENT, quiescent CURRENT, quiescent, class C THERMAL2 RESISTANCE, AC junction to case RESISTANCE, DC junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case TEST CONDITIONS1 MIN TYP MAX UNITS
Full temperature range
5 10 8 20
10 50 15 2 100 2 200
VS-10 90 10kHz BW, RS = 1K
1011 5 106 10
mV V/C V/V V kh pA pA/V pA pF V dB V RMS
94 RL = 500, CC = 10pF CC = 10pF, 130V p-p, RL = 8 Full temp range, CC = 68pF, RL = 10 VS-10 5
106 4.5 66 60 VS-8 2 27
dB MHz kHz
IO = 5A 10V step, AV = -10 CC = 10pF, RL = 8 AV = +1, CC = 68pF RCL = 0
10 150 15 50 30 75 50 5
V A s V/s nF
See Note 3
V mA mA C/W C/W C/W C
F > 60Hz F < 60Hz Full temperature range Meets full range specifications
1.3 1.7 30 -25 +85
NOTES: 1. 2. 3.
Unless otherwise noted TC = 25C, CC = 10pF, RC = 1K. DC input specifications are value given. Power supply voltage is typical rating. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. For guidance, refer to heatsink data sheet. Derate maximum supply voltage .5 V/C below case temperature of 25C. No derating is needed above TC = 25C. The PA46 is constructed from MOSFET transistors. ESD handling procedures must be observed. The exposed substrate is beryllia (BeO). Do not crush, machine, or subject to temperatures in excess of 850C to avoid generating toxic fumes.
CAUTION
APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739
TYPICAL PERFORMANCE GRAPHS
PA46
NORMALIZED CURRENT LIMIT, ILIM (X)
INTERNAL POWER DISSIPATION, P(W)
POWER DERATING
100 80 60 40 20 0 0 25 50 75 100 125 CASE TEMPERATURE, TC (C)
CURRENT LIMIT DRIFT
1.2 1.1 1.0 0.9 0.8 0.7 -50 -25 0 25 50 75 100 125 CASE TEMPERATURE, TC (C) 0 4
ABSOLUTE CURRENT LIMIT
CURRENT LIMIT, I (A)
+I LIM
0
-I LIM -4 1.0 0.1 10 CURRENT LIMIT RESISTOR, R CL ()
SMALL SIGNAL RESPONSE
120
PHASE RESPONSE
200
POWER RESPONSE
OUTPUT VOLTAGE, VO (VPP )
OPEN LOOP GAIN, A(dB)
-45 80
CC = 10pF
PHASE, ()
CC = 10pF
100 80 60 40 CC = 68pF 20
CC = 10pF
-90 CC = 68pF -135 RL = 500 -180 .1 1 10 100 1K 10K 100K 1M 10M FREQUENCY, f (Hz)
40
CC = 68pF RL = 1K RL = 500 1 10 100 1K 10K 100K 1M 10M FREQUENCY, f (Hz)
0 .1
R L = 8 10 8 6 4 10K 20K 40K 100K 200K 400K FREQUENCY, f (Hz)
1M
HARMONIC DISTORTION
1.000 .400 AV = 10 CC = 10pf RL = 8 50
SLEW RATE
VOLTAGE DROP FROM SUPPLY, VS - VO (V) NORMALIZED QUIESCENT CURRENT, IQ(X)
QUIESCENT CURRENT
2.0
DISTORTION, THD (%)
T
C
.100 .040 .020 .010 .004 1W 85W
1.5
=
= TC 25
TC = +12
85C - OUT
-5
C
5C
.200
SLEW RATE, SR(V/s)
40 No Load
30
1.0
20 8 Load 10
.002 5W .001 10 20 40 100 400 1K 2K 4K 10K 20K FREQUENCY, f (Hz)
0 20 40 60 80 COMPENSATION CAPACITANCE, C C (pF)
0.5 10 30 50 70 90 110 130 150 TOTAL SUPPLY VOLTAGE, VS (V)
COMMON MODE REJECTION, CMR (dB)
POWER SUPPLY REJECTION, PSR (dB)
COMMON MODE REJECTION
100
POWER SUPPLY REJECTION
120 100 +VS 80 60 40 -VS 20 0 10
OUTPUT VOLTAGE SWING
10
80
8
60
85C +OUT
6
40
4
25C +OUT 25C - OUT
20 10
100 1K 10K 100K FREQUENCY, f (Hz)
1M
100 1K 10K 100K FREQUENCY, f (Hz)
1M
2 0 2 4 OUTPUT CURRENT, I O (A)
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
5 C
PA46
GENERAL
Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexmicrotech.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit and heat sink selection. The "Application Notes" and "Technical Seminar" sections contain a wealth of information on specific types of applications. Package outlines, heat sinks, mounting hardware and other accessories are located in the "Packages and Accessories" section. Evaluation Kits are available for most Apex product models, consult the "Evaluation Kit" section for details. For the most current version of all Apex product data sheets, visit www.apexmicrotech.com.
OPERATING CONSIDERATIONS
and bypass capacitor combination should match the time constant of the sum-point resistance and sum-point capacitance. The PA46 is externally compensated and performance can be tailored to the application. The compensation network CCRC must be mounted closely to the amplifier pins 8 and 9 to avoid noise coupling to these high impedance nodes.
SAFE OPERATING AREA (SOA)
The MOSFET output stage of this power operational amplifier has limitations from its channel temperature. NOTE: The output is protected against transient flyback. However, for protection against sustained, high energy flyback, external fast-recovery diodes should be used. SAFE OPERATING AREA
6.0
CURRENT LIMIT
Current limiting is achieved by developing 0.83V on the amplifiers current sense circuit by way of an internal tie to the output drive (pin 5) and an external current sense line (pin 10). A sense resistor RCL is used to relate this sense voltage to a current flowing from output drive. 0.83 - 0.05 * ICL RCL = ICL ICL = 0.83 RCL + 0.05
OUTPUT CURRENT FROM +VS OR -VS, (A)
4.0
2.0
DC
DC ,T
DC
20
10 0
m
0m
S
,T
S
C
=
85
1.0 0.8 0.6 0.4
C
=
C
12
with a maximum practical value of 16. RCL is added to the typical value of output resistance and affects the total possible swing since it carries the load current. The swing reduction, VR can be established VR = IOUT * RCL.
5 C
INPUT PROTECTION
The PA46 inputs are protected against common mode voltages up to the supply rails, differential voltages up to 16 volts and static discharge. Differential voltages exceeding 16 volts will be clipped by the protection circuitry. However, if more than a few milliamps of current is available from the input drive source, the protection circuitry could be destroyed. The protection circuitry includes 300 ohm current limiting resistors at each input. This security may be insufficient for severe overdrive of the input. Adding external resistors to the application which limits severe input overdrive current to 1mA, will prevent damage.
0.2 PULSE CURVES @ 10% DUTY CYCLE MAX 4 6 8 10 20 40 60 100 200 SUPPLY TO OUTPUT DIFFERENTIAL, VS -VO (V)
0.1
SHUTDOWN
Pin 3 (SHDN) will shut off the output stage when at least 90A is pulled from pin 3 to any voltage at least 3 volts less than +Vs (ground, for example).
STABILITY
The PA46 has sufficient phase margin when compensated for unity gain to be stable with capacitive loads of at least 10nF. However, the low pass circuit created by the sum-point (-in) capacitance and the feedback network may add phase shift and cause instabilities. As a rule, the sum-point load resistance (input and feedback resistors in parallel) should be 1k ohm or less. Alternatively, use a bypass capacitor across the feedback resistor. The time constant of the feedback resistor
BIAS CLASS OPTION FOR LOWER QUIESCENT CURRENT
Normally pin 7 (IQ ) is left open. When pin 7 is tied to pin 8 (CCI ) the quiescent current in the output stage is disabled. This results in lower quiescent current, but also class C biasing of the output stage.
This data sheet has been carefully CORPORATION * to be NORTH SHANNON ROAD * assumed for possible inaccuracies or omissions. All specifications HOTLINE: 1 (800) 546-2739 APEX MICROTECHNOLOGY checked and is believed 5980reliable, however, no responsibility isTUCSON, ARIZONA 85741 * USA * APPLICATIONS are subject to change without notice. PA46U REV. C FEBRUARY 2001 (c) 2001 Apex Microtechnology Corp.

▲Up To Search▲

Price & Availability of PA46

	To Download PA46 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .