_______________________________________________________________

e
r
r
1

CFCe

r
r
2

VOS

VNF

F
C

c
c
1

S
L

VOS

VOF

Thermal
Shut Down

Vcc

PGND

10k

20k

10k

25k

Det Amp

7.5k

VINT

CTK

e
r
r
1

CTK

e
r
r
2

c
c
2

VNF

P
GND

VOL

D-

VOL

D+

VOT

K-

VOT

K+

PVcc1

20k

10k

7.5k

Det Amp

PVcc2

Standby

SLED

Driver

Actuator

Driver

Actuator

Driver

10k

15k

PVcc2

PVcc1

Vcc

7.5k

BTL Driver for CD-ROM Drivers & DVD Player

May, 2004 V1.0

1/6

ML5954

ML5954 4-channel BTL driver for CD-ROM Driver & DVD Player

Application

CD-ROM Driver
DVD player

Features

Wide Dynamic Range (4.0V(Typ.) When

=12V, PV

=5V and R

)

Level Shift Circuit on-chip
Thermal Shutdown Circuit on-chip
Internal Standby Mode.
HSOP-28 package

General Description

The ML5954 is a four-channel BTL driver IC for driving the motors and actuators in products such as
CD-ROM and DVD. Two channels use current feedback to minimize the current phase shift caused by the
influence of load inductance. The IC is used in CD-ROM drivers and DVD players.

Block Diagram

_______________________________________________________________

ML5954

BTL Driver for CD-ROM Drivers & DVD Player

May, 2004 V1.0

Pin Configuration

e
r
r
1

e
r
r
2

ML5954

c
c
2

VNF

VOL

D-

VOL

D+

VOT

K-

VOT

K+

CFCe

r
r
1

CFCe

VOS

VNF

F
C

c
c
1

VOS

VOF

Pin Description

Pin Pin Name

Function

Pin Pin Name

Function

VINFC

Focus driver input

VOTK+

Tracking driver output (+)

CFCerr1

For connection of capacitor for the error
amp filter

VOTK-

Tracking driver output (-)

CFCerr2

For connection of capacitor for the error
amp filter

VOLD+

Loading driver output (+)

VINSL+

Op Amp input (+) for the sled driver

VOLD-

Loading driver output (-)

VINSL-

Op Amp input (-) for the sled driver

PGND

Ground for actuator driver block

VOSL

Op Amp output for the sled driver

VNFTK

Tracking driver feedback pin

VNFFC

Focus driver feedback pin

CC2

Power supply voltage for actuator driver
block

Supply

voltage

GND Ground

CC1

Power supply voltage for sled driver
block

VINLD

Loading driver input

PGND

Ground for sled driver block

CTKerr2

For connection of capacitor for the error
amp filter

VOSL-

Sled driver output (-)

CTKerr1

For connection of capacitor for the error
amp filter

VOSL+

Sled driver output (+)

VINTK

Tracking driver input

VOFC-

Focus driver output (-)

BIAS Bias

input

VOFC+

Focus driver output (+)

STBY

Standby control

Note 1: The indicated polarity for the output pins is defined under the inputs are (+) polarity. The output H bridge power
supply pins are PV

CC2

for the focus & tracking channel, PV

CC1

for the loading channel, and V

for the pre-block and sled

channel. Always ensure that V

CC1/2.

2/6

_______________________________________________________________

ML5954

BTL Driver for CD-ROM Drivers & DVD Player

May, 2004 V1.0

Absolute Maximum Ratings

Parameter

Symbol

Ratings

Units

Supply Voltage

VCC, PV

CC1/2

13.5

Power Dissipation

1.7 *

Storage Temperature

Tstg

-55 ~ +150

Note 1 : Power dissipation is reduced by 5mW for each increase in T

of 1

�

C over 25

�

Note 2 : Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.

These are stress ratings only, and functional operation of the device at these or any other conditions beyond those

indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for

extended periods may affect device reliability.

Recommended operating conditions

Parameter

Symbol

Ratings

Units

Operating Temperature

OPR

0 ~ +70

4.3 ~ 13.2

CC1

4.3

Supply Voltage

CC2

4.3

3/6

_______________________________________________________________

ML5954

BTL Driver for CD-ROM Drivers & DVD Player

May, 2004 V1.0

Electrical Characteristics

=25

�C, V

=12V, PV

CC1

=PV

CC2

=5V, V

BIAS

=2.5V, R

, unless otherwise specified.)

Parameter

Symbol

Conditions

Min Typ Max Units

Quiescent Current

Standby Current

0.5

Standby on Voltage

STON

All channel on

0.5

Standby off Voltage

STOFF

All channel off

2.0

Actuator driver

Output Offset Current

-6

Maximum Output Amplitude

= V

BIAS

� 1.5V

3.6 4.0

Transmission Gain

= V

BIAS

� 0.2V

1.3 1.5 1.7 A/V

Sled Motor Driver / Pre Op-Amp

Common Input Voltage Range

ICM

-0.3

11.0

Input Bias Current

300

Output Low Level Voltage

Load

0.8

1.1

Output Source Current

0.3

0.5

Output sink Current I

Sled Motor Driver

Output Offset voltage

OOFSL

-100

100 mV

Maximum Output Voltage

OMSL

7.5

9.0

Closed-Loop Voltage Gain

VSL

= V

BIAS

� 0.2V

18.0 20.0 22.0 dB

Loading Motor Driver

Output Offset Voltage

OOFLD

-50

Maximum Output Voltage

OMLD

3.6

4.0

Closed-Loop G

VLD

= V

BIAS

� 0.2V

13.5 15.5 17.5 dB

Gain Error by Polarity

VLD

= V

BIAS

� 0.2V

0 1 2 dB

4/6

_______________________________________________________________

ML5954

BTL Driver for CD-ROM Drivers & DVD Player

May, 2004 V1.0

Application Circuit

ML5954

DSP

5V or 12V

FOCUS COIL

KING

TRACKING COIL

SLED MOTOR

LOADING
MOTOR

12V

5V or 12V

Micro-controller

ANDB

Precautions for use

(1) This IC has a built-in thermal shutdown circuit that mutes the output current when the chip temperature reached

175

C (Typ). The hysteresis is set to 25

C (Typ.), so the driver circuits start up again when the chip temperature falls

to 150

C (Typ.).

(2) The driver buffer is switched off when the supply voltage falls below 3.5V (Typ.), and is switched back on when the

voltage reaches 3.7V (Typ.) again.

(3) In case standby pin voltage under 1.4V or opened, quiescent current is muted. Standby pin voltage should be over

1.8V for normal application.

(4) Insert the by-pass capacitor between V

-pin and GND-pin of the IC as near as possible (approximately 0.1uF)

(5) Heat dissipation fins are attached to the GND on the inside of the package. Make sure to connect these to the external

GND.

Supplement: (Current-feedback driver)

The transmission gain (output current/input voltage) is given by :

)

(

)

(

WIRE

,where R

WIRE

is the total gold wire resistance inside the package (0.15 � 0.05) (Typ.).

5/6

Электронный компонент: ML5954