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AN41908A-VB

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21
Zoom
Focus
M
Iris
Hal
l
Se
nso
r
M M
Total Area = 381mm
2
SOP24
158.6mm
2
SOP24
158.6mm
2
Company A
Total Area = 36mm
2
(About 80-90% reduction!!
)
AN41908A
AN41908A
Total Area = 162mm
2
Zoom
Focus
M
Iris
Ha
ll
Se
ns
or
M M
SSOP32
97.8mm
2
78
78
%
%
Reduction
Reduction
TSSOP14
32mm
2
TSSOP14
32mm
2
TSSOP14
32mm
2
TSSOP14
32mm
2
M
Zoom Focus
Iris
M M
Hall
Sens
or
Hall Amp
Hall Bias
Hall Bias
Error Amp
P
I
D
M
Iris
8 OP Amps and external parts are needed for Iris function…
90.5
90.5
%
%
Reduction
Reduction
1Chip LSI of Zoom,
Focus and Iris function
- Small Camera design
- PCB cost reduction
Company B
PCB
PCB
Space
Space
R
R
eduction
eduction
Hall
Sen
sor
AN41908A
Advantage for
M
Iris
Hal
l
Se
nso
r
SOP24SOP24
TSSOP14
TSSOP14
Resistance
/Capacitance
AN41908A
AN41908A
M
Iris
Digital
PID
Characteristic adjustment
SIF：Serial Inter Face
PID：Proportion / integral calculus / differential
calculus 3 elements digital control system
Hall
Sens
or
Analog
position
Detect circuit
Existing
Existing
system
system
Microcomputer
(Serial setting）
SIF
Reduc
Reduc
ed Design
ed Design
-
-
In Time
In Time
You needed to adjust Iris circuit
when you start to design camera…
You needed to change external resistance
and capacitance for Iris adjustment…
Inconvenient… Improved !!
Easy Adjustment of Iris Circuit
Easy Adjustment of Iris Circuit
Software can arrange
the circuit by SIF
because of built-in digital PID
Ideal motor current
waveform
Back electromotive
force unbalance
Phase gap
Motor tolerance
* Equal amplitude
* Phase difference 90deg
Amplitude
correction
circuit
Phase
correction
circuit
90
°
Unbalance
Gap
Noise Level (dB)
No correction
-15
-10
-5
0
5
10
15
20
25
30
35
2.50Hz
32.50Hz
62.50Hz
92.50Hz
122.50Hz
152.50Hz
182.50Hz
212.50Hz
242.50Hz
272.50Hz
302.50Hz
332.50Hz
362.50Hz
392.50Hz
422.50Hz
452.50Hz
482.50Hz
512.50Hz
542.50Hz
572.50Hz
602.50Hz
632.50Hz
662.50Hz
692.50Hz
722.50Hz
752.50Hz
782.50Hz
812.50Hz
842.50Hz
872.50Hz
902.50Hz
932.50Hz
962.50Hz
992.50Hz
-15
-10
-5
0
5
10
15
20
25
30
35
2.50Hz
35.00Hz
67.50Hz
100.00Hz
132.50Hz
165.00Hz
197.50Hz
230.00Hz
262.50Hz
295.00Hz
327.50Hz
360.00Hz
392.50Hz
425.00Hz
457.50Hz
490.00Hz
522.50Hz
555.00Hz
587.50Hz
620.00Hz
652.50Hz
685.00Hz
717.50Hz
750.00Hz
782.50Hz
815.00Hz
847.50Hz
880.00Hz
912.50Hz
945.00Hz
977.50Hz
Frequency (Hz)
Frequency (Hz)
Noise Level (dB)
Correction
Low
Low
N
N
oise
oise
M
M
icro
icro
S
S
tep
tep
D
D
rive for Zoom and Focus
rive for Zoom and Focus
-10dB !!
Less Acoustic Noise by Motor Tolerance Correction Function
Less Acoustic Noise by Motor Tolerance Correction Function
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21

AN41908A-VB

Mfr. #:
Buy AN41908A-VB
Manufacturer:
Panasonic
Description:
Display Drivers & Controllers 5Chan Mtr Drvr Zoom 2ch,Focus 2ch, Iris
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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