Rohm BA5956FM Silicon monolithic integrated circuit Datasheet

1/11
STRUCTURE
PRODUCT SERIES
TYPE
PACKAGE OUTLINES
POWER DISSIPATION
BLOCK DIAGRAM
APPLICATION
TEST CIRCUIT
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Silicon Monolithic Integrated Circuit
Power driver for CD/DVD player
BA5956FM
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
◎ Features
○ 2 channel current feedback type driver, 3 channel BTL driver.
○ Employs the HSOP-M36 power package for compaction.
○ Has a wide dynamic range.
○ The thermal shutdown circuit is built.
○ Mute circuit is built in. ( except for loading driver )
○ A power supply is divided into 4 systems.
【PreVcc, PowVcc1=actuator, PowVcc2=loading motor, PowVcc3=sled motor, spindle motor】
◎Absolute Maximum Rating (Ta=25℃)
Item
Supply voltage
Power dissipation
Maximum output current
Operating temperature range
Storage temperature range
Symbol
PreVcc,PowVcc
Pd
Iomax
Topr
Tstg
Rating
18
2.2*1
1*2
-35~85
-55~150
Unit
V
W
A
℃
℃
*1 Rating for 70 ㎜×70 ㎜(size), 1.6 ㎜(thickness), copper foil occupation ratio less than 3%,
And use of glass-epoxy substrate.
When this IC is used above Ta=25℃, note that this rating decreases 17.6mW each time
the temperature increases 1℃.
*2 This rating of permissible dissipation must not exceed ASO.
◎Operating Supply Range
PreVcc
4.5 ~ 14 (V)
PowVcc
4.5 ~ PreVcc(V)
REV. B
2/11
● ELECTRICAL CHARACTERISTICS
(Unless otherwise noted, Ta=25℃, PreVcc=PowVcc3=12V, PowVcc1=PowVcc2=5V, BIAS=1.65V, RL=8Ω,
Rd=0.5Ω,C=100pF)
Parameter
symbol
MIN
TYP
MAX
Unit
IQ
-
Figure.5
VMON
V
Figure.5
Voltage for mute OFF
VMOFF
0
2.0
44
0.5
-
mA
Voltage for mute ON
34
-
-
V
Figure.5
-6
3.6
1.5
0
4.0
1.8
6
-
mA
Figure.5
2.1
A/V
0.4
-6
-
0
-
10.5
6
300
0.5
-
-
V
Figure.5
mV
Figure.5
nA
Figure.5
V
Figure.5
mA
Figure.5
mA
Figure.5
Quiescent current
Condition
Test circuit
< Actuator driver >
Output offset current
IOOF
Maximum output voltage
VOM
Trans conductance
Gvc
V
VIN=±1.65V
Figure.5
VIN=BIAS±0.2V
Figure.5
< Sled motor driver pre OPAMP & OPAMP>
Common mode input range
Input offset voltage
Input bias current
Low level output voltage
VICM
VIOFOP
IBOP
VOLOP
Output source current
ISO
Output sink current
ISI
-
-
0.5
0.5
0.2
-
-
-50
8.0
17.6
0
9.5
19.6
-50
3.5
15.7
0
4.0
17.7
-50
8.0
15.7
0
9.5
17.7
< Sled motor driver >
Output offset voltage
VOOFSL
Maximum output voltage
VOMSL
Closed loop voltage gain
GVSL
50
-
mV
V
VIN=±1.65V
Figure.5
21.6
dB
VIN=±0.2V
Figure.5
50
-
mV
V
VIN=±1.65V
Figure.5
19.7
dB
VIN=BIAS±0.2V
Figure.5
50
-
mV
V
VIN=±1.65V
Figure.5
19.7
dB
VIN=BIAS±0.2V
Figure.5
Figure.5
< Loading motor driver >
Output offset voltage
VOOFLD
Maximum output voltage
VOMLD
Gain error by polarity
GVLD
Figure.5
< Spindle motor driver >
Output offset voltage
VOOFSP
Maximum output voltage
VOMS
Gain error by polarity
GVSP
○ This product is not designed for protection against radioactive rays.
REV. B
Figure.5
3/11
REV. B
4/11
Electrical characteristic curves
Pd / W
3
2
1
0
0
25
50
75
100
125
150
AMBIENT TEMPERATURE, Ta /℃
Pd;Power Dissipation
Rating for 70mm×70mm(size), 1.6mm(thickness), copper foil occupation ratio less than 3%, and use of
glass-epoxy substrate.
Figure 2 POWER DISSIPATION
REV. B
5/11
36
35
34
33
32
31
30
29
28
27
PVcc3
26
25
PVcc2
PreVcc
24
23
22
21
20
19
PGND
10K
Sled
Driver
Loading
Driver
25K
- +
- +
- +
10K
Spindle
Driver
- +
10K
Thermal
shut down
20K
PVcc2
15K
PVcc3
- +
PVcc1
+ ×2
7.5K
20K
+ -
Det. Amp.
+ 7.5K
10K
×2
MUTE
7.5K
20K
+ 10K
1
2
3
4
5
6
7.5K
7
8
PreGND
PVcc1
10
11
9
Actuator
Driver
Actuator
Driver
15
17
PGND
12
13
14
16
18
Unit of resistance: 
Figure 3 BLOCK DIAGRAM
● Pin description
No
No
Pin name
1
2
3
4
5
6
7
LDBIAS
BIAS
FCIN
CFCerr1
CFCerr2
MUTE
TKIN
Pin name
Input for bias voltage (Loading driver)
Input for bias: voltage
Input for focus driver
Connection with capacitor for error amplifier 1
Connection with capacitor for error amplifier 2
Input for mute control
Input for tacking driver
Pin description
19
20
21
22
23
24
25
VOLD (-)
VOLD (+)
VOSL (-)
VOSL (+)
VOSP (-)
VOSP (+)
PGND2
8
9
10
11
12
13
14
15
16
17
18
CTKerr1
CTKerr2
PreGND
PVcc1
VNFFC
PGND1
VNFTK
VOTK(-)
VOTK (+)
VOFC(-)
VOFC (+)
Connection with capacitor for error amplifier 1
Connection with capacitor for error amplifier 2
GND for pre-drive block
Vcc for power block of actuator
Feedback for focus driver
GND for power block of actuator
Feedback for tracking driver
Inverted output of tracking
Non inverted output of tracking
Inverted output of focus
Non inverted output of focus
26
27
28
29
30
31
32
33
34
35
36
PVcc2
PVcc3
PreVcc
SPIN
OPOUTSL
OPINSL(-)
OPINSL (+)
LDIN
OPOUT
OPIN(-)
OPIN (+)
notes) Symbol of + and ‐ (output of drivers) means polarity to input pin.
(For example if voltage of pin3 is high , pin18 is high.)
REV. B
Pin descrition
Inverted output of loading
Non inverted output of loading
Inverted output of sled
Non inverted output of sled
Inverted output of spindle
Non inverted output of spindle
GND for power block of loading, sled and
spindle driver
Vcc for power block of loading driver
Vcc for power block of sled and spindle driver
Vcc for pre-drive block
Input for spindle driver
Sled Pre OP amplifier output
Sled Pre OP amplifier invert input
Sled Pre OP amplifier non invert input
Input for loading driver
OP amplifier output
OP amplifier invert input
OP amplifier non invert input
1
36
-com
Figure 4 APPLICATION
REV. B
2
+ -
Thermal
shut down
35
3
10K
20K
+ -
34
4
33
7.5K
7.5K
5
32
MUTE
6
31
+ -
7
10K
20K
+ -
30
8
29
7.5K
7.5K
9
PreVcc
28
SERVO
10
10K
10K
10K
26
11
PVcc1
PVcc2
PreGND
×2
Det. Amp.
×2
PVcc3
27
- +
Tracking
10k
- +
Focus
0.1m
- +
BIAS
Sled
Spindle
MUTE
Loading
3 state type
- +
10k
- +
Power Supply for
-com
12
15K
25K
Spindle
Driver
24
13
14
23
Rd
22
21
16
Tracking
Coil
15
Actuator
Driver
Sled
Driver
M
M
PGND
PGND
20K
25
Sled
Motor
Spindle
Motor
Rd
17
Focus
Coil
Actuator
Driver
18
PVcc1
PVcc3
PVcc2
19
Loading
Driver
20
M
Loading
Motor
6/11
Loading BIAS
7/11
8
OPAMP
34
OUT
OUT
35
INM
INM
36
32
31
30
VIN3
33
12V
INP
INP
OPAMP
8
8
5V
12V
VIN5
IQ
29
Vo5
28
27
PreVcc
26
25
PVcc3 PVcc2
PGND
10K
20K
10K
25K
10K
15K
Thermal
shut down
24
Vo4
23
Spindle
Driver
Vo3
21
22
20
Sled
Driver
19
Loading
Driver
PVcc2
PVcc3
PVcc1
7.5K
×2
7.5K
20K
7.5K
×2
20K
10K
MUTE
1
2
3
4
5
VIN1
Det. Amp.
7.5K
PreGND
10K
7
6
8
9
11
Actuator
Driver
15
17
PGND
PVcc1
10
Actuator
Driver
12
VIN2
13
14
16
0.5
Io
Io
8
1.65V
1.65V
100pF
100pF
MUTE
5V
Vo1
100H
18
0.5
8
100H
INP
INM
OUT
VOOF
VBOP
4
3
SW1
1M
2
2
1
1M
VBOP
1
10k
10k
SW3
1
1
BIAS
SW2
2
2
SW4
VINOP
IOP
OPAMP
Figure5 TEST CIRCUIT
● Measurement circuit switch table
REV. B
VOOP
Vo2
8/11
Symbol
Switch
SW1
SW2
SW3
Input
SW4
VIN1
IQ
1
1
2
1
1.65V
VMON
1
1
2
1
1.65V
VMOFF
1
1
2
1
1.65V
<Actuator driver>
IOOF
1
1
2
1
1.65V
VOM
±1.65V
1
1
2
1
Gvc
±0.2V
1
1
2
1
<Sled motor driver pre OPAMP & OPAMP>
IBOP
2
1
3
1
1.65V
VIOFOP
1
1
2
1
1.65V
VOLOP
1
2
1
1
1.65V
ISO
1
1
2
2
1.65V
ISI
1
1
2
2
1.65V
<Sled motor driver>
VOOFSL
1
1
2
1
1.65V
VOMSL
1
2
1
1
1.65V
GVSL
1
2
1
1
1.65V
<Loading driver>
VOOFLD
1
1
2
1
1.65V
VOMLD
1
1
2
1
1.65V
GVLD
1
1
2
1
1.65V
<Spindle driver>
VOOFSP
1
1
2
1
1.65V
VOMS
1
1
2
1
1.65V
GVSP
1
1
2
1
1.65V
Condition
VIN2
VIN3
VIN5
VINOP
MUTE
1.65V
1.65V
1.65V
-
2.0V
1.65V
1.65V
1.65V
-
2.0V
1.65V
1.65V
1.65V
-
0.5V
IQ
IQ
IQ
1.65V
1.65V
1.65V
-
2.0V
±1.65V
1.65V
1.65V
-
2.0V
VIN1,2=0, 3.3V
±0.2V
1.65V
1.65V
-
2.0V
VIN=1.45, 1.85V
1.65V
1.65V
1.65V
-
2.0V
1.65V
1.65V
1.65V
-
2.0V
1.65V
1.65V
1.65V
12V
2.0V
1.65V
1.65V
1.65V
-
2.0V
1.65V
1.65V
1.65V
-
2.0V
1.65V
1.65V
1.65V
-
2.0V
1.65V
1.65V
1.65V
±1.65V
2.0V
VINOP=0, 3.3V
1.65V
1.65V
1.65V
±0.2V
2.0V
VINOP=1.45, 1.85V
1.65V
1.65V
1.65V
-
2.0V
±1.65V
1.65V
-
2.0V
VIN3=0, 3.3V
1.65V
±0.2V
1.65V
-
2.0V
VIN3=1.45, 1.85V
1.65V
1.65V
1.65V
-
2.0V
1.65V
1.65V
±1.65V
-
2.0V
VIN5=0, 3.3V
1.65V
1.65V
±0.2V
-
2.0V
VIN5=1.45, 1.85V
REV. B
IO
VO1,2
IO
VBOP
VOOF
VOOP
VOOP
VOOP
1.65V
● EQUIVALENT CIRCUIT OF TERMINALS
Measureme
nt point
VO4
VO4
VO4
VO3
VO3
VO3
VO5
VO5
VO5
9/11
31,32 PIN
Pre OP amplifier input for sled
driver
10k
OP amplifier output for sled driver
( & driver input
)
10k
inverted output for focus and tracking
driver
10k
Driver input
10k
REV. B
VREF
10k
15,17 PIN
3,7,29,33 PIN
30 PIN
OP amplifier output
34 PIN
2k
35,36 PIN
OP amplifier input
2k
10/11
10k
75k
Mute
7.5k
Connection with capacitor for error amplifier 2
4,8 PIN
REV. B
15k
Connection with capacitor for error amplifier 1
●Notes on use
5,9 PIN
7.5k
6 PIN
50k
20k
Feedback for focus and tracking driver
12,14 PIN
25k
Output for driver
(-)
19,21,23PIN
50k
10k
1,2 PIN
Bias input
10k
(+)
16,18,20,22,24 PIN
10k
11/11
1.
Thermal-shut- down circuit built-in. In case IC chip temperature rise to 175℃ (typ.) thermalshut-down circuit operates and output current is muted. Next time IC chip temperature falls below
150℃ (typ.)
2.
In case mute-pin voltage under 0.5V or opened, quiescent current is muted. Mute-pin voltage should
be over 2.0V for normal application.
3.
In case supply voltage falls below 3.5V (typ.), output current is muted. Next time supply voltage rises
to 3.7V(typ.), the driver blocks start.
4.
Bias-pin (pin1 and pin2) should be pulled up more than 1.2V. In case bias-pin voltage is pulled down
under 1.0V (typ.), output current is muted.
5.
In case a capacitance load is connected to the OP amplifier output, the amplifier phase margin
decreases, which causes the peak or oscillator.
When connecting such load, insert a resistance in series between the output and the capacitance load
and take a full consideration for frequency characteristics, to prevent problems during practical use.
6.
Insert the by-pass capacitor between Vcc-pin and GND-pin of IC as possible as near (approximately
0.1F).
7.
Heat dissipation fins are attached to the GND on the inside of the package. Make sure to connect
these to the external GND
8.
Avoid the short-circuits between:
Output pin and Vcc
Output pin and GND
Output pins
If this caution is ignored, IC damage may cause smokes.
9.
Examine in consideration of operating margin, when each driver output falls below sub-voltage of
IC (GND) due to counter-electromotive-force of load.
< Supplement >
Current feedback driver
Trans conductance (output current/input voltage) is shown as follws.
gm 
1
Rd  RWIRE
( A/V )
RWIRE: ≒0.075(±0.05)
(Typ.):Au wire
REV. B
Notice
Notes
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Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
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R1120A
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