EK16 Cirrus Logic Inc, EK16 Datasheet - Page 5

• Manufacturer Part Number: EK16
• Description: KIT EVAL PA90,91,92,93,98 PINOUT
• Manufacturer: Cirrus Logic Inc
• Series: Apex Precision Power™r

Specifications of EK16

• Channels Per Ic: 1 - Single
• Amplifier Type: Power
• Output Type: Single-Ended
• Board Type: Bare (Unpopulated)
• Utilized Ic / Part: PA92, PA93, PA98
• Product: Amplifier Modules
• Description/function: Audio Amplifiers
• For Use With/related Products: PA90, PA91, PA92, PA93, PA98
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Operating Temperature: -
• Current - Output / Channel: -
• Voltage - Supply, Single/dual (±): -
• -3db Bandwidth: -
• Slew Rate: -
• Current - Supply (main Ic): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1390

TYPICAL APPLICATION
DYNAMIC FOCUSING
Dynamic focusing is the active correction of focusing voltage
as a beam traverses the face of a CRT. This is necessary in
high resolution flat face monitors since the distance between
cathode and screen varies as the beam moves from the center
of the screen to the edges. PA98 lends itself well to this func-
tion since it can be connected as a summing amplifier with
inputs from the nominal focus potential and the dynamic cor-
rection. The nominal might be derived from a potentiometer, or
perhaps automatic focusing circuitry might be used to generate this potential. The dynamic correction is generated
from the sweep voltages by calculating the distance of the beam from the center of the display.
PHASE COMPENSATION
C
3. 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.cirrus.com for design tools
that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selec-
tion; Apex Precision Power’s complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits.
CURRENT LIMIT
For proper operation, the current limit resistor (R
gram. The minimum value is 1.4 ohm, however for optimum reliability the resistor value should be set as high as
possible. The value is calculated as follows; with the maximum practical value of 30 ohms.
SAFE OPERATING AREA (SOA)
The MOSFET output stage of this power operational
amplifier has two distinct limitations:
1. The current handling capability of the MOSFET ge-
2. The junction temperature of the output MOSFETs.
NOTE: The output stage is protected against transient
flyback. However, for protection against sustained, high
energy flyback, external fast-recovery diodes should be
used.
SAFE OPERATING CURVES
The safe operating area curves define the maximum
additional internal power dissipation the amplifier can
tolerate when it produces the necessary output to drive
an external load. This is not the same as the absolute
maximum internal power dissipation listed elsewhere in
the specification since the quiescent power dissipation
is significant compared to the total.
PA98U
C
RATED FOR FULL SUPPLY VOLTAGE
ometry and the wire bonds.
Gain
100
20
1
3.3pF
68pF
10pF
R
C
CL
C
P r o d u c t T e c h n o l o g y F r o m
=
I
LIM
.7
100Ω
330Ω
- .016
0Ω
R
C
CL
) must be connected as shown in the external connection dia-
500
200
100
300
50
30
20
10
X SWEEP
Y SWEEP
25
SAMPLE
SAMPLE
SUPPLY TO OUTPUT DIFFERENTIAL, V
PULSE CURVES @ 10% DUTY CYCLE MAX.
z = x + y
FOCUS
DC
2
50
2
75 100 125
R
R
IN1
IN2
SOA
PA98 • PA98A
+225V
225V
PA98
R
F
R
250
CL
S
- V
O
(V)
TO
FOCUS
GRID
500
5