PA119CE Cirrus Logic Inc, PA119CE Datasheet - Page 4

• Manufacturer Part Number: PA119CE
• Description: IC PWR AMP VIDEO PWR 80V 5A TO3
• Manufacturer: Cirrus Logic Inc
• Series: Apex Precision Power™r

Specifications of PA119CE

• Applications: General Purpose
• Number Of Circuits: 1
• Slew Rate: 900 V/µs
• Current - Supply: 100mA
• Current - Output / Channel: 4A
• Voltage - Supply, Single/dual (±): 30 V ~ 80 V, ±15 V ~ 40 V
• Mounting Type: Surface Mount
• Package / Case: TO-3-8
• Number Of Channels: 1
• Voltage Gain Db: 111 dB
• Common Mode Rejection Ratio (min): 70 dB
• Input Offset Voltage: 3 mV
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Maximum Dual Supply Voltage: +/- 40 V
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 598-1311

PA119CE • PA119CEA
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; heat sink selection; Apex Precision
Power’s complete Application Notes library; Technical Seminar
Workbook; and Evaluation Kits.
CURRENT LIMIT
ing gate drive when voltage on pin 2 (pin 7) exceeds .65V dif-
ferential from the positive (negative) supply rail. With internal
resistors equal to 1.2Ω, current limits are approximately 0.5A
with no external current limit resistors. With the addition of
external resistors current limit will be:
PHASE COMPENSATION
required to insure stability. In addition to the resistive feedback
network, roll off or integrating capacitors must also be consid-
ered when determining gain settings. The capacitance values
listed in the external connection diagram, along with good
high frequency layout practice, will insure stability. Interpolate
values for intermediate gain settings.
SAFE OPERATING AREA (SOA)
fier has two distinct limitations:
4
INTERNAL VOLTAGE DROP SUPPLY TO OUTPUT, V
Please read Application Note 1 "General Operating Con-
Q2 (and Q25) limit output current by turning on and remov-
At low gain settings, an external compensation capacitor is
The MOSFET output stage of this power operational ampli-
To determine values of external current limit resistors:
10
3
2
1
5
4
10
T
C
I
R
=25°C
LIM
CL
=
=
20
.65V
R
I
CL
CL
.65V
– .54A
+.54A
30
SOA
40 50
80
S
-V
O
100
(V)
P r o d u c t I n n o v a t i o n F r o m
1. The current handling capability of the MOSFET geometry
2. The junction temperature of the output MOSFETs.
for internal thermal delays. For a given application, the direc-
tion 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:
1. Capacitive and inductive loads up to the following maximums
2. Safe short circuit combinations of voltage and current are
3. The output stage is protected against transient flyback.
SUPPLY CURRENT
discharge gate capacitance of Q7 and Q19. As these currents
approach 0.5A, the savings of quiescent current over that of a
class A driver stage is considerable. However, supply current
drawn by the PA119, even with no load, varies with slew rate
of the output signal as shown below.
OUTPUT LEADS
frequency range, even a few inches of wire have significant
inductances, raising the interconnection impedance and limit-
ing the output current slew rate. Furthermore, the skin effect
increases the resistance of heavy wires at high frequencies.
Multistrand Litz Wire is recommended to carry large video
currents with low losses.
The SOA curves combine the effect of these limits and allow
±V
40V
30V
20V
15V
The PA119 features a class A/B driver stage to charge and
Keep the output leads as short as possible. In the video
and the wire bonds.
are safe:
limited to a power level of 100W.
However, for protection against sustained, high energy
flyback, external fast-recovery diodes should be used.
S
400
300
200
100
0
30K
CAPACITIVE LOAD
V
100K 300K
OUT
SUPPLY CURRENT
2500µF
FREQUENCY, F (Hz)
500µF
R
.1µF
= 60V
L
= 500 Ω
∞
P-P
SINE
1M
3M
INDUCTIVE LOAD
10M
100mH
24mH
75mH
11mH
PA119U