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PA46 Datasheet(PDF) 1 Page - Cirrus Logic

Part No. PA46
Description  HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER
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Maker  APEX [Cirrus Logic]
Homepage  http://www.cirrus.com
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PA46 Datasheet(HTML) 1 Page - Cirrus Logic

   
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
FEATURES
• MONOLITHIC MOS TECHNOLOGY
• PROGRAMMABLE I
Q (5 or 50 mA MAX)
• LOW COST
• HIGH VOLTAGE OPERATION—150V
• HIGH SLEW RATE—27V/
µs
• 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 program-
mable. 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.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATION
PA46
+80
RC
CC
RCL
RI
–20
CF
RD
RF
RS
YOKE
VI
±2.5A 7µSec Retrace
Horizontal Deflection Coil Amplifiers
10
4
1
2
6
8
9
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
µSec retrace time, half of which is
required for amplifier slewing. This circuit can perform 15.75
KHz deflection in up to 50
µH coils at up to 5A p-p.
CC1
CC2
8
7
3
9
Q19
Q17
Q16
Q15
Q14
Q9
Q10
Q7
D7
Q21
Q20
–VS
+IN
–IN
Q11
Q12
D4
D2
Q3
D3
D5
Q8
Q13
Q24
D1
Q2
SHDN
Q5
Q6
+VS
CURRENT
SENSE
OUTPUT
DRIVE
IQ
6
5
10
1
2
4
10
89
67
45
12
3
–IN
+IN SHDN –VS OUT +VS
IQ
CC1 CC2 ILIM
RC
RCL
CC
OUTPUT
CC is NPO rated for full suppy voltage.
Phase Compensation
Gain
CC
RC
≥10
10pF
1K
≥ 1
68pF
1K
HTTP://WWW.APEXMICROTECH.COM
(800) 546-APEX
(800) 546-2739
MICROTECHNOLOGY
HIGH VOLTAGE POWER OPERATIONAL AMPLIFIER
PA46
EXTERNAL CONNECTIONS
Package: SIP02


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