AN41908A Lens DriverAN41919A DC Iris Driver

NEW! Special Function Motor Drivers

Panasonic Special Function Motor Drivers For Panasonic Special Function Motor Drivers For Network and Security CamerasNetwork and Security Cameras

1ch Iris controller (Iris servo for dumping coil 1chAN41919ADC Iris Driver

for Box type

UnderMP

QFN44(6mm×6mm)

5ch motor drive controller(Zoom 2ch + Focus 2ch

+ Iris servo for hall sensor 1ch)AN41908ALens Driver

for Dome type

StatusPackage(Chip size)FunctionType

Dome Type Cameras(Iris Servo for Hall Sensor)

Box Type Camera(Iris Servo for Dumping Coil)

Panasonic AN41908ALens Driver for

Dome Type Camera((Iris Servo for Hall Sensor ))

Block Diagram of Network Camera Block Diagram of Network Camera (Hall Sensor)(Hall Sensor)

Image sensor（Including Analog Front End）

Motor2ch

Motor1ch

Motor2ch

Motor1ch

Motor1ch

Pan/Tilt Driver IC

MicroComputer

NetworkRecorder

Block diagram

Zoom/Focus Controller

Iris Controller

Single chip solutionLens Driver AN41908A

Single chip solutionLens Driver AN41908A

IrisZoomFocus

Position SensingElement

(Hall sensor)

MicroComputer

MIris

Zoom

Focus

CSCSKSIN

CS: Chip SelectCSK: Serial ClockSIN: Serial Data Input

Serial

I/F

Micro Step Control circuit

PWMDriver

IrisAnalog circuit

PWMDriver

Iris Digital circuit

(Digital PID)

PID: Proportional Integral Derivative

MMPWM

Driver

Micro Step Control circuit

Panasonic AN41908A Block DiagramPanasonic AN41908A Block DiagramTo Integrate Iris Control Function on Zoom & Focus DriverTo Integrate Iris Control Function on Zoom & Focus Driver

Panasonic AN41908A Single Chip AdvantagesPanasonic AN41908A Single Chip Advantages

PCB Space Reduction

Reduced Design-In Time

Low Acoustic Noise

Low Power Consumption

Zoom Focus

MIris

Hall

Senso

r

M MTotal Area = 381mm2

SOP24158.6mm2

SOP24158.6mm2

Company A

Total Area = 36mm2

(About 80-90% reduction!!)

AN41908AAN41908A

Total Area = 162mm2

Zoom Focus

MIris

Hall

Sensor

M MSSOP3297.8mm2 7878%%

ReductionReductionTSSOP14

32mm2TSSOP14

32mm2

TSSOP1432mm2

TSSOP1432mm2

M

Zoom Focus

IrisM M

HallSens

or

Hall Amp

Hall Bias

Hall Bias

Error AmpP I D M

Iris

8 OP Amps and external parts are needed for Iris function…

90.590.5%%ReductionReduction

1Chip LSI of Zoom,Focus and Iris function

- Small Camera design- PCB cost reduction

Company B

PCB PCB SpaceSpace RReductioneduction

HallSensor

AN41908A

Advantage for

MIris

Hall

Senso

r

SOP24SOP24

TSSOP14TSSOP14

Resistance/Capacitance

AN41908AAN41908A

MIris

DigitalPID

Characteristic adjustment

SIF：Serial Inter FacePID：Proportion / integral calculus / differential

calculus 3 elements digital control system

HallSens

or

Analogposition

Detect circuit

ExistingExisting systemsystem

Microcom

puter

(Serial setting）

SIF

ReducReduced Designed Design--In TimeIn Time

You needed to adjust Iris circuitwhen you start to design camera…

You needed to change external resistance and capacitance for Iris adjustment…

Inconvenient… Improved !!

Easy Adjustment of Iris CircuitEasy Adjustment of Iris Circuit

Software can arrangethe 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

Noi

se L

evel

(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)

Noi

se L

evel

(dB)

Correction

Low Low NNoise oise MMicro icro SStep tep DDrive for Zoom and Focusrive for Zoom and Focus

-10dB !!

Less Acoustic Noise by Motor Tolerance Correction FunctionLess Acoustic Noise by Motor Tolerance Correction Function

Low Power ConsumptionLow Power Consumption

Hall sensor

Iris

MPWMDrive

Digital control part

+/-

Analog position detecting circuit

Position signal from

microcomputer

50% power reduction 50% power reduction by PWM driving system by PWM driving system !!!!(C(Compared with Linear driving system)ompared with Linear driving system)

PID

Iris analog circuitADC

PWM noise cutby digital filter part Iris digital Circuit

low pass low pass

OverviewAN41908A is a lens motor driver IC for camcorder and security-camera featuring the functions of Iris control. Voltage drive system and several torque ripple correction techniques enable super- low noise microstep drive.

Features—Voltage drive system 256-step

microstep drivers (2 systems)—Built-in Iris controller —Motor control by 4-line serial data communication—2 systems of open-drain for driving LED

Applications—Camcorders, Security Cameras

Package—44 pin Plastic Quad Flat Non-leaded Package

Type—Bi-COMS IC

Application circuitV+

V–

1

2

3

4

5

6

7

8

9

10

11

OP3INP

SENS

OP3OUT

REF

AVDD3

ADTESTIN

TEST

OUTE2

VDD5

GND5

OUTE1

12 13 14 15 16 17 18 19 20 21 22

N.C

.

OU

TD2

OU

TD1

MG

ND

B

OU

TC2

OU

TC1

MV

CC

B

OU

TB2

OU

TB1

OU

TA2

MV

CC

A

44 43 42 41 40 39 38 37 36 35 34

PLS1

SIN

VD

_FZ

VD

_IS

RST

B

OP4

OU

T

OP4

INN

VR

EF

GN

DA

CR

EFIN

PLS2

23

33

32

31

30

29

28

27

26

25

24 MGNDA

OUTA1

N.C.

SCK

SOUT

CS

GNDD

LED2

LED1

OSCIN

DVDD

HallSensorH– H+

0

0.1 F

100

pF

0.1 F

10kAVDD3(3.1 V)

MVDD5(4.8 V)

MVCCB(4.8 V)

MVCCA(4.8 V)

DVDD(3.1 V)

0.01 F

V+

V–

1

2

3

4

5

6

7

8

9

10

11

OP3INP

SENS

OP3OUT

REF

AVDD3

ADTESTIN

TEST

OUTE2

VDD5

GND5

OUTE1

12 13 14 15 16 17 18 19 20 21 22

N.C

.

OU

TD2

OU

TD1

MG

ND

B

OU

TC2

OU

TC1

MV

CC

B

OU

TB2

OU

TB1

OU

TA2

MV

CC

A

44 43 42 41 40 39 38 37 36 35 34

PLS1

SIN

VD

_FZ

VD

_IS

RST

B

OP4

OU

T

OP4

INN

VR

EF

GN

DA

CR

EFIN

PLS2

23

33

32

31

30

29

28

27

26

25

24 MGNDA

OUTA1

N.C.

SCK

SOUT

CS

GNDD

LED2

LED1

OSCIN

DVDD

1

2

3

4

5

6

7

8

9

10

11

OP3INP

SENS

OP3OUT

REF

AVDD3

ADTESTIN

TEST

OUTE2

VDD5

GND5

OUTE1

1

2

3

4

5

6

7

8

9

10

11

OP3INP

SENS

OP3OUT

REF

AVDD3

ADTESTIN

TEST

OUTE2

VDD5

GND5

OUTE1

12 13 14 15 16 17 18 19 20 21 22

N.C

.

OU

TD2

OU

TD1

MG

ND

B

OU

TC2

OU

TC1

MV

CC

B

OU

TB2

OU

TB1

OU

TA2

MV

CC

A

12 13 14 15 16 17 18 19 20 21 22

N.C

.

OU

TD2

OU

TD1

MG

ND

B

OU

TC2

OU

TC1

MV

CC

B

OU

TB2

OU

TB1

OU

TA2

MV

CC

A

44 43 42 41 40 39 38 37 36 35 34

PLS1

SIN

VD

_FZ

VD

_IS

RST

B

OP4

OU

T

OP4

INN

VR

EF

GN

DA

CR

EFIN

PLS2

44 43 42 41 40 39 38 37 36 35 34

PLS1

SIN

VD

_FZ

VD

_IS

RST

B

OP4

OU

T

OP4

INN

VR

EF

GN

DA

CR

EFIN

PLS2

23

33

32

31

30

29

28

27

26

25

24 MGNDA

OUTA1

N.C.

SCK

SOUT

CS

GNDD

LED2

LED1

OSCIN

DVDD

23

33

32

31

30

29

28

27

26

25

24 MGNDA

OUTA1

N.C.

SCK

SOUT

CS

GNDD

LED2

LED1

OSCIN

DVDD

HallSensorH– H+

0

0.1 F

100

pF

0.1 F

10kAVDD3(3.1 V)

MVDD5(4.8 V)

MVCCB(4.8 V)

MVCCA(4.8 V)

DVDD(3.1 V)

0.01 F

Panasonic AN41908A Application CircuitPanasonic AN41908A Application CircuitPanasonic can prepare evaluation board and more specific applicaPanasonic can prepare evaluation board and more specific application notes.tion notes.

Evaluation BoardEvaluation Board

Panasonic AN41919ADC Iris Driver for

Box Type Camera(Iris Servo for Dumping Coil)

Block Diagram of Network Camera Block Diagram of Network Camera (DC(DC--Iris)Iris)

Image sensor（Including Analog Front End）

Motor1ch

MicroComputer

NetworkRecorder

Block diagram

DC Iris Control(OP-Amp)

Single chip solutionDC Iris Driver AN41919A

Single chip solutionDC Iris Driver AN41919A

Integration,

Industry’s first !!

DCIris

ManualManual

Panasonic AN41919A Block DiagramPanasonic AN41919A Block Diagram

AN41919A

MicroComputer M

CS

SCK

SIN

CS: Chip SelectSCK: Serial ClockSIN: Serial Data Input

SerialI/F PWM

Driver

Parameter setting

IrisAnalogcircuit

IrisDigitalCircuit

(Digital PID)

Luminance target signal Damping Coil

Signal

Target Signal

Single Chip Solution of DC Iris Function

Contributes to SetsContributes to Sets’’ Miniature Design.Miniature Design.

Panasonic AN41919A AdvantagesPanasonic AN41919A Advantages

Reduced Design-In Time

Low Power Consumption

SIF：Serial Inter Face

ExistingExisting SystemSystem

PID：Proportion / integral calculus / differentialcalculus 3 elements digital control system

ReducReduced Designed Design--In TimeIn Time

AN41919AAN41919A

Iris

DigitalPID

Characteristic adjustment

Microcom

puter

(Serial setting）

SIFM

Analogposition

Detect circuit

Easy Adjustment of Iris CircuitEasy Adjustment of Iris Circuit

You needed to adjust Iris circuitwhen you start to design camera…

You needed to change external resistance and capacitance for Iris adjustment…

Inconvenient… Improved !!

Software can arrangethe circuit by SIF

because of built-in digital PID

MIris

TSSOP14TSSOP14

Resistance/Capacitance

IrisDigital control part

＋/－

Analog position detecting circuit

PID

Iris analog circuitADC

Iris digital circuit

low pass low pass

M

Luminance target Signal

PWMDriver

Luminance signal from

microcomputer

Low Power ConsumptionLow Power Consumption

50% Power Reduction 50% Power Reduction by PWM Driving Systemby PWM Driving System(C(Compared with Linear driving system)ompared with Linear driving system)

PWM noise cutby digital filter part

DR

V_O

UT1

DR

V_O

UT2

1

2

3

4

5

6

7

8

9

10

11

12 13 14 15 16 17 18 19 20 21 22

44 43 42 41 40 39 38 37 36 35 34

23

33

32

31

30

29

28

27

26

25

24

100 pFAVDD3(3.1 V)

VDD5(4.8 V)

DVDD(3.1 V)

0.1 FVREF

CREF

AVDD3

ADCIN

N.C.

N.C.

VD

D5

N.C

.

SOU

T

CS

SIN

N.C

.

SCK

OSCIN

OSCOUT

N.C.

N.C.

TEST

N.C.

MONI_2

MONI_1

DVDD

VD_IN

GNDD

TESTOUT

AMPINP

AMPINN

AMPOUT

N.C.

N.C

.

GN

D5

N.C

.

N.C

.

RST

ENA

BLE

N.C

.

AM

P2O

UT

PWM

_IN

N.C

.

GN

DA

AM

P2IN

P

N.C

.

Drive Coil

Damping Coil

CD

S si

gnal

PWM

sign

al

VD signal

OverviewAN41919A is a iris control LSI

for IP-camera and security-camera.

Features—Built-in Iris controller—Iris control by 4-line

serial data communication

Applications—IP-camera, Security-camera

Package—44 pin Plastic Quad Flat Non-leaded Package

Type—Bi-COMS IC

Application Circuit

Panasonic AN41919A Application CircuitPanasonic AN41919A Application CircuitPanasonic can prepare evaluation board and more specific applicaPanasonic can prepare evaluation board and more specific application notes.tion notes.

Evaluation BoardEvaluation Board

AN41908A Lens DriverAN41919A DC Iris Driver

NEW! Special Function Motor Drivers