BA6665FM
Optical disc ICs
Motor driver for CD-ROMs
BA6665FM
The BA6665FM is a CD-ROM spindle motor driver supporting reverse-rotation preventing circuit. It incorporates power
save circuit, thermal shut down circuit, FG output, hall bias, etc. The 3-phasefall-wave pseudo linear driving system
achieves high-performance and multi-function.
zApplications
CD-ROM / RW, DVD-ROM
zFeatures
1) 3-phase, full-wave pseudo linear driving system
2) Built in power save
3) Built in thermal shut down circuit
4) Built in current limit circuit
5) Built in Hall Bias circuit
6) Built in FG-output ( 3 phase parallel output )
7) With switching function of regular / reverse rotations
zAbsolute maximum ratings (Ta=25°C)
Parameter
Supply voltage
Symbol
Limits
Unit
VCC
7
V
Supply voltage
VM
15
V
Power dissipation
Pd
2200∗1
mW
Topr
−20~+75
˚C
Operate.temp.range
Strage.temp.range
Juncition temp.
Maximum o.current
Tstg
−55~+150
˚C
Tjmax
150
˚C
IOUT
1300∗2
mA
70mm×70mm×1.6mm glass epoxy board.
∗1 Derating in done at 17.6mW / ˚C for operating above Ta=25˚C.
∗2 Do not, however exceed Pd, ASO and Tj=150˚C.
zRecommended operating conditions (Ta=25°C)
Parameter
Symbol
Min.
Typ.
Max.
Operating supply voltage
range
VCC
4.5
−
5.5
VM
3.0
−
14.0
Unit
V
BA6665FM
Optical disc ICs
zBlock diagram
28
FIN
DRIVER
RNF
27
TSD
VM
3
25
GAIN
CONTROL
REV
−
5
+
CURRENT
SENSE AMP
7
24
VCC
23
PS
8
+
TL
−
9
+
22
+
TORQUE
SENSE AMP
−
21
−
Hall 1
20
10
+
−
11
−
Hall 2
12
+
13
+
Hall 3
Hall Bias
+
−
−
1.6kΩ
19
VCC
(Typ.)
18
1.6kΩ
VCC
(Typ.)
1.6kΩ
VCC
(Typ.)
17
16
14
FIN
SERVO
SIGNAL
BA6665FM
Optical disc ICs
zPin descriptions
Pin No.
Pin Name
1
N.C.
N.C.
2
N.C.
N.C.
3
A3
4
N.C.
5
A2
6
N.C.
7
A1
8
GND
+
Function
Output3 for motor
N.C.
Output2 for motor
N.C.
Output1 for motor
GND
9
H1
Hall input Amp1. positive input
10
H1−
Hall input Amp1. negative input
11
H2
+
Hall input Amp2. positive input
12
H2−
Hall input Amp2. negative input
13
+
H3
−
Hall input Amp3. positive input
14
H3
Hall input Amp3. negative input
15
N.C.
N.C.
16
FG3
FG3 signal output terminal
17
FG2
FG2 signal output terminal
18
FG1
FG1 signal output terminal
19
VH
Hall bias
20
CNF
Capacitor connection pin for phase compensation
21
ECR
Torque control standard voltage input terminal
22
EC
Torque control voltage input terminal
23
PS
START / STOP switch
24
REV
Reverse terminal
25
VCC
Power supply for signal division
26
N.C.
N.C.
27
VM
Power supply for driver
28
RNF
Terminal connection for current sensing resistor
FIN
FIN
GND
BA6665FM
Optical disc ICs
zElectrical characteristics (unless otherwise noted, Ta=25°C, VCC=5V, VM=12V)
Parameter
Symbol
Typ.
Max.
Unit
−
0
0.2
mA
At power save ON
Fig.1
−
4.7
7.1
mA
At power save OFF
Fig.1
−
−
V
Fig.2
−
1.0
V
Fig.2
0.5
0.9
1.5
V
Min.
TOTAL
Circuit current1
ICC1
Circuit current2
ICC2
POWER SAVE
ON voltage range
VPSON
2.5
OFF voltage range
VPSOFF
−
VHB
HALL BIAS
Hall bias voltage
HALL AMP
Input bias current
Conditions
Test Circuit
IHB=10mA
IHA
−
0.7
3.0
µA
Fig.3
In−phase input voltage range
VHAR
1.5
−
4.0
V
Fig.3
Minimum input level
VINH
50
−
−
mVpp
Fig.3
H3 hysteresis level
VHYS
10
20
40
mV
Fig.6
TORQUE CONTROL
Input voltage range
EC , ECR
0
−
5
V
Offset voltage −
ECOFF −
−70
−40
−10
mV
ECR=1.65V
Fig.5
Offset voltage +
ECOFF +
10
40
70
mV
ECR=1.65V
Fig.5
Input current
ECIN
−
0.5
2.0
µA
Input−output Gain
GEC
0.56
0.7
0.84
A/V
EC=ECR=1.65V
EC=1.3 , 1.5V 1.8 , 2.0V
RNF=0.5Ω
FG
FG output voltage H
VFGH
4.5
4.9
5.0
V
IFG=−20µA
Fig.6
FG output voltage L
VFGL
0
0.25
0.4
V
IFG=3mA
Fig.6
OUTPUT
Saturation voltage H
VOH
−
1.0
1.5
V
IO=−600mA
Fig.4
Saturation voltage L
VOL
−
0.4
0.8
V
IO=600mA
Fig.4
Pre−drive current
IVMP
−
35
70
mA
EC=5V output open
Fig.6
ITL
560
700
840
mA
RNF=0.5Ω
Fig.2
REVERSE
ON voltage range
VRSON
2.5
−
−
V
OFF voltage range
VRSOFF
−
−
1.0
V
Torque limit current
EC , ECR=0.5V~3.3V
Fig.5
BA6665FM
Optical disc ICs
zMeasurement circuit
V2
5V
IHB
5V
A1
12V
1.65V
RNF
ICC1 : Value of 'A1'
VPS=0 [V]
H1+~H3+=(1/2)×VCC+0.1 [V]
H1−~H3−=(1/2)×VCC [V]
A2
ICC2 : Value of 'A1'
VPS=5 [V]
H1+~H3+=(1/2)×VCC+0.1 [V]
H1−~H3−=(1/2)×VCC [V]
VHB : Value of 'V2'
VPS=5 [V]
IHB=10 [mA]
RL
H1+
H2+
H1−
H3+
H2−
H3−
Fig.1 Circuit current ) Test Circuit
Hall bias voltage
12V
5V
1.65V
VPS
VREV
EC
VPSON : Range of 'VPS' that output pins
become input-output table.
(Input condition 1~6)
V1
RNF
VPSOFF : Range of 'VPS' that output pins
become open.
(Input condition 1~6)
VRSON : Range of 'VREV' that output pins
become input-output table.
(Input condition 1~6)
VPS=5 [V] EC=0 [V]
RL
H1+
H2+
H1−
PS ON/OFF range
Fig.2 REV ON/OFF range Test Circuit
Torque limit current
)
H3+
H2−
H3−
VRSOFF : Range of 'VREV' that output pins
become open.
(Input condition 1~6)
VPS=5 [V] EC=0 [V]
ITL
: (Value of 'V1') / 0.5
VPS=5 [V] EC=0 [V]
(Input condition 1~6)
BA6665FM
Optical disc ICs
Input-output table
Output
Input conditions
Regular
Pin No.
9
10
11
12
13
14
7
H1+ H1− H2+ H2− H3+ H3− A1
Reverse
5
3
7
5
3
Test point
(Regular)
A2
A3
A1
A2
A3
Condition 1
L
M
H
M
M
M
H
L
L
L
H
H
7pin HI
Condition 2
H
M
L
M
M
M
L
H
H
H
L
L
7pin Low
Condition 3
M
M
L
M
H
M
L
H
L
H
L
H
5pin HI
Condition 4
M
M
H
M
L
M
H
L
H
L
H
L
5pin Low
Condition 5
H
M
M
M
L
M
L
L
H
H
H
L
3pin HI
Condition 6
L
M
M
M
H
M
H
H
L
L
L
H
3pin Low
Cautions 1 : Regular EC<ECR REV = L, EC>ECR REV=H
Reverse EC<ECR REV = L,
Input voltage : Hi = 2.6V
Mid = 2.5V
Low = 2.4V
12V
5V
1.65V
RNF
IHA : Value of 'A1' (Hn+=4.0V, Hn−=2.5V)
Value of 'A2' (Hn+=2.5V, Hn−=4.0V)
n=1, 2, 3
VHAR : Hall voltage range that output pins
become input-output table.
VINH : Hall input level that output pins
become input-output table.
Hn+−Hn−
Hn−=2.5V (n=1, 2, 3)
RL
A
A
A
H1+
A
H2+
H1−
Input bias current
Fig.3 In-phase input voltage range
Hall minimum input level
)
A
A
H3+
H2−
H3−
Test Circuit
BA6665FM
Optical disc ICs
5V
12V
1.65V
RNF
VOH : In case output measurement pin='H'
by input condition and IO=−600mA,
value of 'VOH'. (VM-RNF short)
VOL : In case output measurement pin='L'
by input condition and IO=600mA,
value of 'VOL'.
H1+
H2+
H1−
H3+
H2−
600mA
3, 5, 7pin
H3−
600mA
3, 5, 7pin
VOH
VOL
VM
GND
Fig.4 Output saturation voltage H ) Test Circuit
Output saturation voltage L
12V
5V
V
EC
1.65V
A
RNF
EC : Torque control operating. range.
ECOFF+, ECOFF− : Offset voltage at ECR=1.65V that
value of 'V' become 3mV.
ECIN : Value of 'A' at EC=ECR=2.5V
GEC : Value of 'V' at EC=1.3V→V1
Value of 'V' at EC=1.5V→V2
Value of 'V' at EC=1.8V→V3
Value of 'V' at EC=2.0V→V4
GEC={(V1−V2) / (1.5−1.3)} / RNF
GEC={(V4−V3) / (2.0−1.8)} / RNF
RNF=0.5Ω
RL
H1+
H2+
H1−
Fig.5 Torque offset voltage
Input-output gain
)
H3+
H2−
Test Circuit
H3−
BA6665FM
Optical disc ICs
VL
IFG
12V A
5V
1.65V
EC
VHYS : Difference Hn+ from Hn− that
FG1 / FG2 / FG3 voltage change. (n=1, 2, 3)
EC=ECR=1.65V
RNF
IVMp : value of 'A'
Output open
(Input condition 1~6)
EC=5V, ECR=2.5V
VFGL : Value of 'FG-OUTPUT-VOLTAGE'
at IFG=3mA (Hn+=L)
VFGH : Value of 'FG-OUTPUT-VOLTAGE'
at IFG=−20µA (Hn+=H)
RL
H1+
H2+
H1−
Hall hysteresis level
Pre-drive current
Fig.6 FG output voltage H
FG output voltage L
)
H3+
H2−
H3−
Test Circuit
zElectrical characteristic curves
7.5
5
5
2.5
HALL BIAS VOLTAGE : VH (V)
CIRCUIT CURRENT : ICC (mA)
CIRCUIT CURRENT : ICC (mA)
9
8
7
6
5
4
3
2
4
3
2
1
1
0
1
2
3
4
5
6
7
0
1
2
3
4
0
5
10 20 30 40 50 60 70 80 90 100
SUPPLY VOLTAGE : VCC (V)
PS VOLTAGE : VPS (V)
HALL BIAS CURRENT : IVH (mA)
Fig.7 Circuit Current
Fig.8 PS Threshold voltage
Fig.9 Hall Bias voltage
ITL (mA)
7
6
5
4
3
2
TORQUE LIMIT CURRENT : ITL
8
900
20
TORQUE LIMIT CURRENT (mA)
FG3 VOLTAGE : VFG3 (V)
9
10
1
800
700
600
500
400
300
200
100
−50 −40 −30 −20 −10 0
10 20 30 40
−
50
−50
0
+50
EC−ECR (mV)
0
1
2
3
4
H3 HYSTERESIS VOLTAGE ; H3 −H3 (mV)
OFFSET VOLTAGE ; EC−ECR (mV)
TORQUE VOLTAGE : EC (V)
Fig.10 H3 Hysteresis Level
Fig.11 Torque Control Offset voltage
Fig.12 Torque Limit Current
+
5
BA6665FM
Optical disc ICs
2.0
1.0
1.0
2.0
1.0
2.0
PRE-DRIVE CURRENT : IVM (mA)
OUTPUT SATURATION VOLTAGE HIGH : VOH (V)
OUTPUT SATURATION VOLTAGE LOW : VOL (V)
OUTPUT CURRENT : IO (A)
1.0
2.0
1.0
2.0
OUTPUT CURRENT : IO (A)
Fig.13 Output Saturation voltage HI
zExternal dimensions (Units : mm)
18.5 ± 0.2
0.11
2.2 ± 0.1
5.15 ± 0.1
0.8
0.25 ± 0.1
9.9 ± 0.3
7.5 ± 0.2
15
1
50
10
20
VM SUPPLY VOLTAGE : VM (V)
Fig.14 Output Saturation voltage Low
28
100
14
0.35 ± 0.1
0.3Min.
0.15
HSOP-M28
Fig.15 Predrive Current
30