PA51A APEX PRECISION POWER, PA51A Datasheet - Page 4

• Manufacturer Part Number: PA51A
• Description: IC, OP-AMP, 16KHZ, 2.6V/µs, TO-3-8
• Manufacturer: APEX PRECISION POWER

Specifications of PA51A

• Op Amp Type: High Current
• No. Of Amplifiers: 1
• Bandwidth: 16kHz
• Slew Rate: 2.6V/µs
• Supply Voltage Range: ± 10V To ± 40V
• Amplifier Case Style: TO-3
• No. Of Pins: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PA51 • PA51A
GENERAL
siderations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specification
interpretation. Visit www.Cirrus.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 con-
tain 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 Precision
Power product models, consult the "Evaluation Kit" section
for details. For the most current version of all Apex Precision
Power product data sheets, visit www.Cirrus.com.
SAFE OPERATING AREA (SOA)
limitations:
1. The current handling capability of the transistor geometry
2. The second breakdown effect which occurs whenever the
3. The junction temperature of the output transistors.
Power Op Amp. For a given application, the direction and
magnitude of the output current should be calculated or mea-
sured 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.
4
Please read Application Note 1 "General Operating Con-
The output stage of most power amplifiers has three distinct
The SOA curves combine the effect of of all limits for this
and the wire bonds.
simultaneous collector current and collector-emitter voltage
exceeds specified limits.
7.0
5.0
3.0
2.0
1.5
1.0
0.7
0.5
0.3
0.2
10
5
SUPPLY TO OUTPUT DIFFERENTIAL VOLTAGE V
7
10
15
SOA
20
30
40
50
S
– V
O
(V)
70 80
P r o d u c t I n n o v a t i o n F r o m
1. Under transient conditions, capacitive and dynamic* induc-
* If the inductive load is driven near steady state conditions,
** Second breakdown effect imposes no limitation but thermal
2. The amplifier can handle any EMF generating or reactive
These simplified limits may be exceeded with further analysis
using the operating conditions for a specific application.
3.The output stage is protected against transient flyback. How-
CURRENT LIMIT
tors, connected as shown in the external connection diagram.
The minimum value for R
reliability it should be set as high as possible. Refer to the
“General Operating Considerations” section of the handbook
for current limit adjust details.
40V
35V
30V
25V
20V
±V
15V
Proper operation requires the use of two current limit resis-
tive loads up to the following maximums are safe:
allowing the output voltage to drop more than 8V below the
supply rail with I
I
should be capacitively coupled or the current limit must be
lowered to meet SOA criteria.
limitations must still be observed.
load and short circuits to the supply rail or shorts to common
if the current limits are set as follows at T
ever, for protection against sustained, high energy flyback,
external fast-recovery diodes should be used.
LIM
S
45V
40V
35V
30V
25V
20V
15V
±V
= 5A while the amplifier is current limiting, the inductor
S
1,600µF
I
CAPACITIVE LOAD
LIM
400µF
800µF
5.0mF
10mF
20mF
= 5A
C, L, OR EMF LOAD
LIM
SHORT TO ±V
= 10A or 15V below the supply rail with
I
0.1A
0.2A
0.3A
0.5A
2.0A
CL
1.2A
1.5A
LIM
200µF
400µF
800µF
2.5mF
5.0mF
10mF
is .06 ohm, however for optimum
= 10A
S
I
INDUCTIVE LOAD
400mH
LIM
20mH
35mH
50mH
11mH
**
= 5A
C
= 85°C.
SHORT TO
COMMON
2.0A
2.4A
3.0A
4.0A
1.3A
1.5A
1.6A
I
LIM
100mH
4.3mH
5.0mH
6.2mH
20mH
15mH
PA51U
= 10A