ROHM BD6665FM, BA7795LS, BA7795FS Datasheet
Spindle motor driver IC for CD-ROM/RW
BD6665FM
Description Dimension (Units : mm)
The BD6665FM has achieved high-efficiency and
low power consumption due to the adoption of
MOSFET output and direct PWM drive.
Power save circuit, current limit circuit, FG threephase synthesis output, hall bias, reverse protection
circuit, short brake SW, and rotation direction
detection terminal are incorporated. The result is a
multi-function and high-performance IC.
Features
1) Direct PWM drive
2) Built-in power save circuit
3) Built-in current limit circuit
4) Built-in FG three-phase synthesis output
5) Built-in hall bias
6) Built-in reverse protection circuit
7) Low power consumption due to MOSFET output
8) Built-in short brake SW
9) Built-in rotation direction detection terminal
9.9±0.3
7.5±0.2
1
0.1
1
±
.
0
2.2
18.5±0.2
1528
1
0.8 0.3Min.
5.15±0.1
14
0.35±0.1
HSOP-M28
00W095A
0.25±0.1
0.15
Applications
CD-ROM/RW
Absolute Maximum Ratings (Ta=25˚C)
Parameter Symbol
Applied voltage (5V for power supply)
Applied voltage (for motor supply)
Power dissipation
Operating temperature range
Storage temperature range
Output current
∗1 Mounted on a glass epoxy board (70mm×70mm×1.6mm)
∗1 Derating:17.6mW/˚C for operation above Ta=25˚C.
∗2 Do not exceed Pd, ASO and Tj=150˚C.
Vcc
VM
Pd
Topr
Tstg
IOMAX
Limits
7
15
2200
~
~
3000
Unit
V
V
∗1
+75–20
+150–55
*2
mW
˚C
∗2
˚C
mA
November, 2000
Recommended Operating Conditions (Ta=25˚C)
Parameter Min. Max. UnitTyp.Symbol
Operating power supply
voltage range
VCC
VM —3 14 V
—4.5 5.5
V
Electrical characteristics (Unless otherwise noted ;Ta=25˚C, Vcc=5V, VM=12V)
Symbol Min. Max. Unit ConditionsTyp.Parameter
Circuit current 1
Circuit current 2
Power save ON voltage
Power save OFF voltage
Input bias current
Minimum input level
Offset voltage (+)
Offset voltage (–)
Output ON resistance
Output limit voltage
Icc1
Icc2
VPSON
VPSOFF
IHA
VINH
Ecofs+
Ecofs–
RON
VTL
—
3.0
—
2.5
–8.0
60
10
–70
—
0.15
—
7.5
—
— —
–1.8
—
40
–40
0.7
0.21
0.2
14
1.0
—
—
70
–10
1.0
0.27
mA
mA
V
V
µA
mVpp
mV
mV
Ω
V
Application Circuit
5
CURRENT
LIMIT
AMP.
100pF
–
+
SERVO
SIGNAL
ECR
EC
470pF
PWM
COMP.
CNF
OSC
20
OSC
+
22
–
21
Torque
Amp.
+
–
Stand-by mode
Stand-by mode
Io=±600mA (Upper+Lower)
RNF=0.33Ω
VM
10
19
6
7
VM
RNF2
GND
+
100 µ F
10 µF
+
VCC
VCC
1
Hall Amp
H1+
23
H1
H2
H3
FG3
H1-
H2+
H2-
H3+
H3-
PS
VH
+
–
24
25
+
–
26
27
+
–
28
PS
4
2
3
H1
H2
H3
EXOR
FIN
MATRIX
D Q
CK Q
D-FF
REVERSE
DETECT
TSD
U–PRE
DRIVER
D–PRE
DRIVER
SB
A1
17
18
A1
A2
VCC
14
15
11
12
13
16
9
A2
A3
A3
RNF1
RNF1
FR
10K Ω
0.33 Ω
0.01 µF
DRIVER
8
BD6665FM
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