APEX PA51

����������������������������
������������
��������������������������������������������������������������
� � � � � � � � � � � � � � �
FEATURES
•
•
•
•
WIDE SUPPLY RANGE — ±10 to ±40V
HIGH OUTPUT CURRENT — ±10A Peak
CLASS “C” OUTPUT — Low Cost
LOW QUIESCENT CURRENT — 2.6mA
APPLICATIONS
•
•
•
•
8-PIN TO-3
PACKAGE STYLE CE
DC SERVO AMPLIFIER
MOTOR/SYNCHRO DRIVER
VALVE AND ACTUATOR CONTROL
DC OR AC POWER REGULATOR
TYPICAL APPLICATION
��
DESCRIPTION
The PA51 and PA51A are high voltage, high output current
operational amplifiers designed to drive resistive, inductive
and capacitive loads. Their complementary common emitter
output stage is the simple class C type optimized for low frequency applications where crossover distortion is not critical.
These amplifiers are not recommended for audio, transducer
or deflection coil drive circuits. The safe operating area (SOA)
is fully specified and can be observed for all operating conditions by selection of user programmable current limiting
resistors. Both amplifiers are internally compensated for all
gain settings. For continuous operation under load, mounting
on a heatsink of proper rating is recommended. Do not use
isolation washers!
This hybrid integrated circuit utilizes thick film conductors,
ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. Ultrasonically
bonded aluminum wires provide reliable interconnections at
all operating temperatures. The 8-pin TO-3 package is electrically isolated and hermetically sealed. The use of compressible thermal washers and/or improper mounting torque will
void the product warranty. Please see “General Operating
Considerations”.
��
���
���
�
�����
��
����
��
����
���������������������������
EXTERNAL CONNECTIONS
� ���
���
�
�
���
�
������
��� �
��������
�
���
�
�
��
�
�
��
���
�
The linear relationship of torque output to current input of
the modern torque motor makes this simple control circuit
ideal for many material processing and testing applications.
The sense resistor develops a feedback voltage proportional
to motor current and the small signal properties of the Power
Op Amp insure accuracy. With this closed loop operation,
temperature induced impedance variations of the motor winding are automatically compensated.
����
�
��
�
���
�
����������������������������������
�
���
����
����
EQUIVALENT SCHEMATIC
���
��
����
�����
����
�
�
�
�
���
� ���
����
��
��
�
���
���
�
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
1
PA51 • PA51A
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +VS to –VS
OUTPUT CURRENT, within SOA
POWER DISSIPATION, internal
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, junction1
TEMPERATURE, pin solder -10s
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE RANGE, case
SPECIFICATIONS
PARAMETER
TEST CONDITIONS 2, 5
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE, vs. temperature
OFFSET VOLTAGE, vs. supply
OFFSET VOLTAGE, vs. power
BIAS CURRENT, initial
BIAS CURRENT, vs. temperature
BIAS CURRENT, vs. supply
OFFSET CURRENT, initial
OFFSET CURRENT, vs. temperature
INPUT IMPEDANCE, common mode
INPUT IMPEDANCE, differential
INPUT CAPACITANCE
COMMON MODE VOLTAGE RANGE3
COMMON MODE REJECTION, DC3
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
Full temperature range
TC = 25°C
TC = 25°C
TC = 25°C
Full temperature range
TC = 25°C, VCM = ±VS –6V
GAIN
OPEN LOOP GAIN at 10Hz
GAIN BANDWIDTH PRODUCT @ 1MHz
POWER BANDWIDTH
PHASE MARGIN
Full temp. range, full load
TC = 25°C, full load
TC = 25°C, IO = 8A, VO = 40VPP
Full temperature range
OUTPUT
VOLTAGE SWING3
VOLTAGE SWING3
VOLTAGE SWING3
CURRENT
SETTLING TIME to .1%
SLEW RATE
CAPACITIVE LOAD, unity gain
CAPACITIVE LOAD, gain > 4
TC = 25°C, IO = 10A
Full temp. range, IO = 4A
Full temp. range, IO = 68mA
TC = 25°C
TC = 25°C, 2V step
TC = 25°C, RL = 6Ω
Full temperature range
Full temperature range
POWER SUPPLY
VOLTAGE
CURRENT, quiescent
Full temperature range
TC = 25°C
THERMAL
RESISTANCE, AC, junction to case4
RESISTANCE, DC, junction to case
RESISTANCE, junction to air
TEMPERATURE RANGE, case
MIN
PA51
TYP
±VS–6
70
±5
±10
±35
±20
±15
±.05
±.02
±12
±.05
250
10
3
±VS–3
110
94
10
±VS–8
±VS–6
±VS–6
±10
1.0
±10
F > 60Hz
F < 60Hz
Meets full range specifications
–25
80V
10A
97W
±VS –3V
±VS
200°C
300°C
–65 to +150°C
–55 to +125°C
MAX
PA51A
TYP
*
80
±2
*
*
*
*
*
*
±5
*
*
*
*
*
*
±10
±65
±40
±30
115
1
16
45
*
*
±VS–5
±VS–4
2
2.6
MIN
*
*
*
*
1.5
SOA
±28
2.6
±36
10
1.0
1.5
30
1.2
1.8
+85
*
*
–55
MAX
UNITS
±5
±40
mV
µV/°C
µV/V
µV/W
nA
nA/°C
nA/V
nA
nA/°C
MΩ
MΩ
pF
V
dB
±20
±10
*
*
*
*
dB
MHz
kHz
°
*
*
V
V
V
A
µs
V/µs
nF
*
*
*
*
±34
*
±40
*
V
mA
*
*
*
*
*
°C/W
°C/W
°C/W
°C
+125
NOTES: * The specification of PA51A is identical to the specification for PA51 in applicable column to the left.
1. Lo
achieve high MTTF.
2. The power supply voltage specified under the TYP rating applies unless otherwise noted as a test condition.
3. +VS and –VS denote the positive and negative supply rail respectively. Total VS is measured from +VS to –VS.
4. Rating applies if the output current alternates between both output transistors at a rate faster than 60Hz.
5. Full temperature range specifications are guaranteed but not 100% tested.
CAUTION
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or
subject to temperatures in excess of 850°C to avoid generating toxic fumes.
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
2
TYPICAL PERFORMANCE
GRAPHS
��������������
��������������������
�
�
���
�����
��
��
�� ��� ���
�������������������
���
���������������������
�
���
���
���
������������������������
���
��
��� �� ��� ��� �� ���
�����������������
�������������������������������
�
�
��
��
��
��
�
��������������
�
�
� �
���������
��
�������������������
���
��
��
���
��
��
�
��
��
�
�
��
��
��
���
���
��
��
��
���
��
�� ���
�����������������
���
���
�
��
��� �� ��� ���
�����������������
��
�����������������
���
���
���
��
� ���������
� ��������
���
��
���
��
��
��
�
�
����������
�
��
��
�� ��� ���
�������������������������
��������
��
��
�������
��
��
��
�������
���
��� ���
��� ��� ���
�����������������
���������������������
��
�
�
�
���
��� �� ��� ��� �� ���
�����������������
��
�
��
���
��
��������
�������
���������
�
���
��
�
���
�
����������
��������������
��������������
����
����
�������������
�
�
���
��
����
������������������������������������
����������������������
�������
���������
�
��
�
�
�
�
�����������������������
���
��������������
�
�
�
����
�
���
�
��
�
��
��
��
���
����
����
���
���
��
�
���
���
� ��
���
���
��
�����������������������
����
��
���
�������������������������
��
�
�� �� �� �� �� �� �� ��
����������������������������
��������������������������������
��
���
������������
���
���
���
���
���
���
��
��
��� ���
�
��
��
��
��� ���
�������������������������
���
��������������������������������
��
����������������������������
���
������������
���������������������������������
PA51 • PA51A
�����������
��
��
��
��
��
��
��
���
��
���
�����������������
���
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
3
OPERATING
CONSIDERATIONS
PA51 • PA51A
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.
SAFE OPERATING AREA (SOA)
The output stage of most power amplifiers has three distinct
limitations:
1. The current handling capability of the transistor geometry
and the wire bonds.
2. The second breakdown effect which occurs whenever the
simultaneous collector current and collector-emitter voltage
exceeds specified limits.
3. The junction temperature of the output transistors.
���
�
��
����
���
���
���
���
�
���
���
���
���
��
� �
���
���
���
��
��
��
� �
���
��
��
� �
���
��
�
���
��
�
��
���
���
�����������������������������������
��
���
���
���
1. Under transient conditions, capacitive and dynamic* inductive loads up to the following maximums are safe:
±VS
40V
35V
30V
25V
20V
15V
CAPACITIVE LOAD
ILIM = 5A
ILIM = 10A
400µF
200µF
800µF
400µF
1,600µF
800µF
5.0mF
2.5mF
10mF
5.0mF
20mF
10mF
INDUCTIVE LOAD
ILIM = 5A
ILIM = 10A
11mH
4.3mH
20mH
5.0mH
35mH
6.2mH
50mH
15mH
400mH
20mH
**
100mH
* If the inductive load is driven near steady state conditions,
allowing the output voltage to drop more than 8V below the
supply rail with ILIM = 10A or 15V below the supply rail with
ILIM = 5A while the amplifier is current limiting, the inductor
should be capacitively coupled or the current limit must be
lowered to meet SOA criteria.
** Second breakdown effect imposes no limitation but thermal
limitations must still be observed.
2. The amplifier can handle any EMF generating or reactive
load and short circuits to the supply rail or shorts to common
if the current limits are set as follows at TC = 85°C.
±VS
45V
40V
35V
30V
25V
20V
15V
SHORT TO ±VS
C, L, OR EMF LOAD
0.1A
0.2A
0.3A
0.5A
1.2A
1.5A
2.0A
SHORT TO
COMMON
1.3A
1.5A
1.6A
2.0A
2.4A
3.0A
4.0A
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. However, for protection against sustained, high energy flyback,
external fast-recovery diodes should be used.
CURRENT LIMIT
�
�
��
��
��
��
�� ��
�� ��
�������������������������������������������������
The SOA curves combine the effect of 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.
Proper operation requires the use of two current limit resistors, connected as shown in the external connection diagram.
The minimum value for RCL is .06 ohm, however for optimum
reliability it should be set as high as possible. Refer to the
“General Operating Considerations” section of the handbook
for current limit adjust details.
This data
sheet has been carefullyCORPORATION
checked and is believed
to be NORTH
reliable, however,
no responsibility
is assumed for
possible inaccuracies
omissions.
All specifications HOTLINE:
are subject to1change
without
notice.
APEX
MICROTECHNOLOGY
• 5980
SHANNON
ROAD • TUCSON,
ARIZONA
85741 •orUSA
• APPLICATIONS
(800)
546-2739
4
PA51U REV N MARCH 2005 © 2005 Apex Microtechnology Corp.