CMD4508

5-CH BTL Driver for DVD Player

* All specs and applications shown above subject to change without prior notice.

1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN

Email: server@ceramate.com.tw

Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052

Page 1 of 6

Rev

1.0 Dec. 15,2004

Features Descriptions

2-CH BTL driver
2-CH BTL driver with current feedback
1-CH forward/reverse control DC motor
Built-in motor speed control circuit
Built-in TSD (thermal shut down) circuit
Built-in mute mode
Operating supply voltage(4.5V~13.2V)

The CMD450

8 is a 5-CH motor driver for

CD-p/VCD/DVD systems. It is composed of
2-CH BTL driver, 2-CH driver with current
feedback and 1-CH forward/reverse control
DC motor driver.

Internal Block Diagram

10K

25K

15K

25K

10K

Spindle

Driver

Actuator

Driver

Actuator

Driver

Sled

Driver

TRAY

DRIVER

Pre-DRV

MUTE

Thermal

Shut down

VCC1

VCC2

VCC1

VINFC

TR B

REGO2VINSL+

FWD

REV

REGO1

VCC1

VOTR- VOTR+ VOSL+ VOSL- VOFC- VOFC+

MUTE BIAS

VINTK

TRB 2

VINLD

GND

VCTL

VCC2

VOLD-

VOLD+ VOTK- VOTK+

PGND

GND

CMD4508

5-CH BTL Driver for DVD Player

* All specs and applications shown above subject to change without prior notice.

1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN

Email: server@ceramate.com.tw

Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052

Page 2 of 6

Rev

1.0 Dec. 15,2004

Pin Assignments

Pin Definitions

NO SYMBOL FUNCTION NO SYMBOL FUNCTION

1 VINFC Input for focus driver 15 VOTK+ Tracking driver output (+)

2 TRB

Connect to external transistor
base

16 VOTK- Tracking driver output (-)

3 REGO2

Regulator voltage output,
connect to external transistor
collector

17 VOLD+ Spindle driver output (+)

4 VINSL+ Input for the sled driver 18 VOLD- Spindle driver output (-)

5 REGO1

Regulator voltage output,
connect to external transistor
collector

19 Vcc2

Vcc for power block of spindle,
tracking and focus

6 FWD Tray driver forward input 20

NC No connection

7 REV Tray driver reverse input 21 VCTL Speed control input of tray driver

8 Vcc1

Vcc for pre-drive block and
power block of sled and tray

22 GND Ground

9 VOTP- Tray driver output (-) 23 VINLD Input for spindle driver

10 VOTR+ Tray driver output (+) 24

No connection

11 VOSL+ Sled driver output (+) 25 TRB 2 Connect to external transistor base

12 VOSL- Sled driver output (-) 26 VINTK Input for tracking driver
13 VOFC- Focus driver output (-) 27 BIAS Input for reference voltage
14 VOFC+ Focus driver output (+) 28 MUTE Input for mute control

CMD4508

5-CH BTL Driver for DVD Player

* All specs and applications shown above subject to change without prior notice.

1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN

Email: server@ceramate.com.tw

Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052

Page 3 of 6

Rev

1.0 Dec. 15,2004

Absolute Maximum Rating(Ta=25

)

CHARACTERISTICS SYMBOL LIMITS UNIT

Supply voltage

Vcc1
Vcc2

13.5 V

Power dissipation Pd *1.7 W
Operate Temp range Topr -35~+85

Storage Temp range Tstg -55~+150

Note:
1. When mounted on 50mm x 50mm x 1mm PCB ( Phenolic resin material).
2. Power dissipation reduces 20mW/

for using above Ta=25 .

3. Do not exceed Pd and SOA

Power Dissipation Curve

Recommended Operating Conditions

CHARACTERISTICS SYMBOL LIMITS UNIT

Vcc1 4.3~13.2 V

Supply voltage

Vcc2 4.3~Vcc1 V

100

125

150

Ambient Temperature ( )

175

issipa

tion

(mW)

CMD4508

5-CH BTL Driver for DVD Player

* All specs and applications shown above subject to change without prior notice.

1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN

Email: server@ceramate.com.tw

Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052

Page 4 of 6

Rev

1.0 Dec. 15,2004

Electrical Characteristics

(VCC1=8V, VCC2=5V, BIAS=2.5V, f=1kHz, RL=8

, RS=0.5

, Ta=25

unless otherwise specified)

Limit

Characteristics

Symbol

Conditions

Min Typ. Max

Unit

Quiescent current Icc - 30 - mA

Voltage for mute ON Vston 0 - 0.5 V

Voltage for mute OFF Vstoff 2.0 - 5 V

[Actuator Part]

Output offset voltage Voo - - +50 mV
Maximum output voltage Vom @10Load 3.6

4.0

Voltage gain Gv VIN=BIAS+0.2Vpp ac @1KHz 21.5 23.5 25.5 dB

[Sled Part]

Output offset voltage Voofsl - - +100 mV

Maximum output voltage Vomsl @20Load 7.5

9.0

Closed loop voltage gain Gvsl VIN=BIAS+0.2Vpp ac @1KHz 18 20 22 dB

[Spindle Part]

Output offset voltage Voofld - - +50 mV

Maximum output voltage Vomax @8Load -

3.5

Voltage gain Gvld VIN=BIAS+0.2Vpp ac @1KHz 13.3 15.5 17.5 dB

Gain error by polarity Gvld

VIN=BIAS+0.2Vpp ac @1KHz 0 1 2 dB

[Tray Driver Part]

Output saturation voltage 1 Vsat1 Upper + Lower saturation, IL=200mA 0.7 1.1 1.5 V
Output saturation voltage

between F&R

Vsat1

Output saturation voltage 1 between

FWD and REV

- - 0.1 V

Output saturation voltage 2 Vsat2 Upper + Lower saturation, IL=500mA 1.0 1.55 2.2 V
Output adjustable gain on "H"

side voltage

Vvtr

VCTL=2V 7.4 9.2 11 dB

High level input voltage V

1.5 - Vcc V

Low level input voltage V

-0.3 - 0.5 V

High level input current I

VFWD=VREV=5V - 180 270 �A

[Regulator]

Output voltage Vreg IL=500mA 1.5 4.0

Output load differential V

IL=500mA -50

Power supply voltage

differential

VCC

(Vcc=4.5~8V) IL=500mA -25 0 25 mV

CMD4508

5-CH BTL Driver for DVD Player

* All specs and applications shown above subject to change without prior notice.

1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN

Email: server@ceramate.com.tw

Tel:886-3-3214525 Http: www.ceramate.com.tw
Fax:886-3-3521052

Page 5 of 6

Rev

1.0 Dec. 15,2004

Application Circuit

10K

25K

15K

25K

10K

Spindle

Driver

Actuator

Driver

Actuator

Driver

Sled

Driver

TRAY

DRIVER

Pre-DRV

MUTE

Thermal

Shun Down

VCC1

VCC2

VCC1

PGND

GND

12V

Motor Loading

MUTE

SERVO

U-COM

5V/12V

Tray

Voltage

Control

Focus Coil

Sled Motor

Spindle Motor

Tracking Coil

Spindle

Tacking

Vcenter

Focus

Sled

FWD

REV

ADJ 2.5V

REGOUT

10K

16.4K

47uF

Электронный компонент: CMD4508