Minilogic ML5954 Ml5954 4-channel btl driver for cd-rom driver & dvd player Datasheet

ML5954
_______________________________________________________________
ML5954 4-channel BTL driver for CD-ROM Driver & DVD Player
™ Application
™ Features
‹ CD-ROM Driver
‹ DVD player
z
Wide Dynamic Range (4.0V(Typ.) When
VCC=12V, PVCC=5V and RL=8Ω)
Level Shift Circuit on-chip
Thermal Shutdown Circuit on-chip
Internal Standby Mode.
HSOP-28 package
z
z
z
z
™ 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.
22
VOTK+
GND
23
VOTK-
VINLD
24
VOLD+
CTKerr2
25
VOLD-
CTKerr1
26
PGND
VINTK
27
VNFTK
BIAS
28
PVcc2
STBY
™ Block Diagram
21
20
19
18
17
16
15
PVcc2
10kΩ
7.5kΩ
+
20kΩ
Standby
7.5kΩ
10kΩ
-
x2
+
Thermal
Shut Down
-
15kΩ
Loading
Driver
PVcc1
+
Det Amp
Actuator
Driver
PVcc2
+
7.5kΩ
-
Vcc
Det Amp
+
x2
+
20kΩ
-
7.5kΩ
10kΩ
+
25kΩ
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VINSL+
VINSL-
VOSL
VNFFC
Vcc
PVcc1
PGND
VOSL-
VOSL+
VOFC-
VOFC+
PVcc1 PGND
CFCerr2
Vcc
CFCerr1
-
Actuator
Driver
VINFC
10kΩ
SLED
Driver
-
BTL Driver for CD-ROM Drivers & DVD Player
May, 2004 V1.0
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ML5954
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STBY
BIAS
VINTK
CTKerr1
CTKerr2
VINLD
GND
PVcc2
VNFTK
PGND
VOLD-
VOLD+
VOTK-
VOTK+
™ Pin Configuration
28
27
26
25
24
23
22
21
20
19
18
17
16
15
11
12
13
14
VOFC+
10
VOFC-
VNFFC
9
VOSL+
VOSL
8
VOSL-
7
PGND
6
PVcc1
5
Vcc
4
VINSL-
CFCerr1
3
VINSL+
2
CFCerr2
1
VINFC
ML5954
™ Pin Description
Pin
Pin Name
Function
Pin
Pin Name
Function
Focus driver input
15
VOTK+
Tracking driver output (+)
16
VOTK-
Tracking driver output (-)
17
VOLD+
Loading driver output (+)
1
VINFC
2
CFCerr1
3
CFCerr2
4
VINSL+
Op Amp input (+) for the sled driver
18
VOLD-
Loading driver output (-)
5
VINSL-
Op Amp input (-) for the sled driver
19
PGND
Ground for actuator driver block
6
VOSL
Op Amp output for the sled driver
20
VNFTK
7
VNFFC
Focus driver feedback pin
21
PVCC2
Power supply voltage for actuator driver
block
8
VCC
Ground
For connection of capacitor for the error
amp filter
For connection of capacitor for the error
amp filter
Supply voltage
22
GND
23
VINLD
Tracking driver feedback pin
9
PVCC1
Power supply voltage for sled driver
block
10
PGND
Ground for sled driver block
24
CTKerr2
11
VOSL-
Sled driver output (-)
25
CTKerr1
12
VOSL+
Sled driver output (+)
26
VINTK
13
VOFC-
Focus driver output (-)
27
BIAS
Bias input
14
VOFC+
Focus driver output (+)
28
STBY
Standby control
Loading driver input
For connection of capacitor for the error
amp filter
For connection of capacitor for the error
amp filter
Tracking driver input
Note 1: The indicated polarity for the output pins is defined under the inputs are (+) polarity. The output H bridge power
supply pins are PVCC2 for the focus & tracking channel, PVCC1 for the loading channel, and VCC for the pre-block and sled
channel. Always ensure that VCC ≤ PVCC1/2.
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ML5954
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™ Absolute Maximum Ratings
Parameter
Symbol
Ratings
Units
Supply Voltage
VCC, PVCC1/2
13.5
V
Power Dissipation
Storage Temperature
Pd
1.7 *
Tstg
1
W
o
-55 ~ +150
C
Note 1 : Power dissipation is reduced by 5mW for each increase in TA of 1°C over 25°C.
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
Operating Temperature
TOPR
0 ~ +70
VCC
4.3 ~ 13.2
V
PVCC1
4.3 ~ VCC
V
PVCC2
4.3 ~ VCC
V
Supply Voltage
BTL Driver for CD-ROM Drivers & DVD Player
Units
o
C
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ML5954
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™ Electrical Characteristics
(TA=25°C, VCC=12V, PVCC1=PVCC2=5V, VBIAS=2.5V, RL1=RL2=RL3=RL4=8Ω, unless otherwise specified.)
Parameter
Symbol
Conditions
Min Typ Max Units
Quiescent Current
ICC
18 27 mA
Standby Current
IST
0.5 mA
Standby on Voltage
VSTON
All channel on
0.5
V
Standby off Voltage
VSTOFF
All channel off
2.0
V
Actuator driver
Output Offset Current
IOO
-6
6 mA
3.6 4.0
V
Maximum Output Amplitude
VOM
VIN= VBIAS ± 1.5V
Transmission Gain
gm
1.3 1.5 1.7 A/V
VIN= VBIAS ± 0.2V
Sled Motor Driver / Pre Op-Amp
Common Input Voltage Range
VICM
-0.3
11.0 V
Input Bias Current
IIB
30 300 nA
Output Low Level Voltage
VOL
No Load
0.8 1.1
V
Output Source Current
ISO
0.3 0.5
mA
Output sink Current ISI
ISI
1
mA
Sled Motor Driver
Output Offset voltage
VOOFSL
-100 0 100 mV
Maximum Output Voltage
VOMSL
7.5 9.0
V
Closed-Loop Voltage Gain
GVSL
18.0 20.0 22.0 dB
VIN= VBIAS ± 0.2V
Loading Motor Driver
Output Offset Voltage
VOOFLD
-50 0
50 mV
Maximum Output Voltage
VOMLD
3.6 4.0
V
Closed-Loop
GVLD
13.5
15.5
17.5
dB
VIN= VBIAS ± 0.2V
Gain Error by Polarity
∆GVLD
0
1
2
dB
VIN= VBIAS ± 0.2V
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ML5954
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™ Application Circuit
Micro-controller
LOADING
STANDBY
VCENTER
SLED
FOCUS
TRACKING
DSP
TRACKING COIL
LOADING
MOTOR
Rd
M
5V or 12V
28
27
26
25
24
23
22
21
20
19
18
17
16
15
8
9
10
11
12
13
14
ML5954
1
2
3
4
5
6
7
12V
5V or 12V
M
Rd
SLED MOTOR
FOCUS COIL
Precautions for use
(1) This IC has a built-in thermal shutdown circuit that mutes the output current when the chip temperature reached
175oC (Typ). The hysteresis is set to 25 oC (Typ.), so the driver circuits start up again when the chip temperature falls
to 150 oC (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 VCC-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 :
gm =
1
( A /V )
( Rd + RWIRE )
,where RWIRE is the total gold wire resistance inside the package (0.15Ω ± 0.05Ω) (Typ.).
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ML5954
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™ Mechanical Dimensions
HSOP-28
Unit: mm (inch)
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and
reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use.
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