TECHNICAL NOTE
Motor Drivers for MDs
Sensorless
5ch System
Motor Drivers for MDs
BD6603KVT
●
Description
1chip system motor driver IC incorporating all kinds of drivers (spindle, sled, focus, tracking, head up/down) required for portable recording
and playback player. Incorporates a charge pump, and low ON resistance power DMOS driving contributes to a reduction in the power
consumption of application sets. The 1chip structure in a small, thin package realizes the small and thin application sets.
●Features
1) Operates at low power supply voltage (2.3V min.)
2) Power DMOS output with low ON resistance (0.8Ω typ.)
3) Incorporates a charge pump circuit for VG boost
4) 3-phase full-wave sensorless driving system for spindle
5) 4ch, 2-value control H-bridges for sled/focus/tracking/head up/down
6) 2ch half-bridges for spindle/sled VM power supply
●Applications
Recording and playback MD
Ver.B Oct.2005
●Absolute
maximum ratings(Ta=25°C)
Parameter
Power supply voltage for control circuit
Power supply voltage for driver block
Power supply voltage for pre-driver block
Output current
Power dissipation
Operating temperature range
Storage temperature range
Junction temperature
*Must
not exceed Pd or ASO.
**Reduced
by 10.0mW/°C over Ta=25°C, when mounted on a glass epoxy board (70mm×70mm×1.6mm).
Symbol
VCC
VM
VG
Iomax
Pd
Topr
Tstg
Tjmax
Limit
7
7
15
*500
**1250
-25½+75
-55½+150
+150
Unit
V
V
V
mA
mW
℃
℃
℃
●Operating
conditions
Parameter
Power supply voltage
Pulse input frequency
Symbol
VCC
VM
VG
fin
Min.
2.3
-
VM+3
-
Typ.
3.0
-
9
-
Max.
6.5
6.5
14
200
Unit
V
V
V
kHz
2/16
●Electrical
characteristics
(Unless otherwise specified, Ta=25°C, VCC=3V, VM=2.5V, fin=176kHz)
Limit
Min.
-
-
-
Typ.
5.6
16
0.8
Max.
8.0
50
1.2
Parameter
Circuit current
Output ON resistance
½Boost
circuit½
Output voltage
½Oscillation
circuit½
Self propelled oscillating frequency
External clock synchronous range
Position detection comparator
offset
Detection comparator input range
CST charge current
CST discharge current
CSL charge current
CSL discharge current
Brake comparator input current
Brake comparator input offset
Brake comparator input range
FG output L voltage
Logic H level input voltage
Logic L level input voltage
Logic H level input current
Logic L level input current
Output propagation delay time
Minimum input pulse width
Symbol
ICC
IST
RON
Unit
mA
µA
Ω
Conditions
at operation in all blocks
at standby in all blocks
upper and lower ON resistance
in total
VG=10V
VG1
VG2
fOSC
fSYNC
7.5
6.0
125
-
8.9
7.3
250
-
10.0
9.5
400
500
V
V
kHz
kHz
each input L
at operation in all blocks
input from EXTCLK pin
½Spindle
(3-phase full-wave sensorless driver) block½
VCO
VCD
ICTO
ICTI
ICLO
ICLI
IBR
VBO
VBD
VOLF
VINH
VINL
IINH1
IINH2
IINL
TRISE
TFALL
tmin
-10
0
-0.9
2.0
-4.0
2.0
-
-15
0
-
VCC-0.4
-
-
-
-1
-
-
200
-
-
-2.1
3.6
-8.0
5.5
-
-
-
0.2
-
-
-
350
-
0.2
0.1
-
+10
VCC-1.0
-3.3
5.3
-12
5.3
2.0
+15
VCC-1.5
0.3
-
0.4
1
600
-
1
0.7
-
mV
V
µA
mA
µA
µA
µA
mV
V
V
V
V
µA
µA
µA
µsec
µsec
nsec
output pulse width 2/3tmin
or more
VIN=3V
VIN=3V EXTCLK pin
VIN=0V
Io=500µA
CST=1V
CST=1V
CSL=VCC-0.4V
CSL=VCC-0.4V
BRK=VCC
½Sled,
focus, tracking, head up/down, PWM power supply (H-bridge, half-bridge driver) block½
◎This
IC is not designed to be radiation-resistant.
3/16
●Reference
data
30
25
Circuit current : ICC [μA]
75℃
Circuit current : ICC [mA]
16
25℃
14
12
10
8
6
4
2
Operating range (2.3 V to 6.5 V)
0
0
1
Operating range (2.3 V to 6.5 V)
2
3
4
VCC [V]
5
6
-25℃
25℃
75℃
20
18
16
25℃
20
15
10
-25℃
Boost voltage : VBST [V]
14
12
10
8
6
4
2
0
0
1
-25℃
75℃
5
0
0
1
Operating range (2.3 V to 6.5 V)
2
3
4
VCC [V]
5
6
2
3
4
VCC [V]
5
6
Fig.1 Circuit current
(at standby in all blocks)
20
18
16
25℃
-25℃
75℃
Fig.2 Circuit current
(at operation in all blocks)
1.2
1.1
ON Resistance : RON [Ω]
ON resistance : RON [Ω]
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0
75℃
25℃
-25℃
Fig.3 Boost circuit output voltage
(Each input L)
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
75℃
25℃
-25℃
Boost voltage : VBST [V]
14
12
10
8
6
4
2
0
0
1
Operating range (2.3 V to 6.5 V)
2
3
4
VCC [V]
5
6
Fig.4 Boost circuit output voltage
(at operation in all blocks)
Fig.5 Spindle output ON resistance
100
200
300
400
Output current : Io [mA]
500
0
Fig.6 H-bridge output ON resistance
100
200
300
400
Output current : Io [mA]
500
1.2
1.1
ON Resistance : RON [Ω]
ON Resistance : RON [Ω]
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0
75℃
25℃
-25℃
1.2
1.1
Output voltage : VFGO [V]
1.0
0.9
0.8
75℃
25℃
-25℃
-25℃
25℃
75℃
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.0
Fig.7 Sled output ON resistance
100
200
300
400
Output current : Io [mA]
500
0
Fig.8 Half-bridge output ON resistance
100
200
300
400
Output current : Io [mA]
500
Fig.9 FG output L voltage
0.5
1.0
1.5
Output current : Io [mA]
2.0
3.0
2.5
-25℃
FG voltage : VFGO [V]
2.0
1.5
1.0
0.5
0.0
0
25℃
75℃
50
100
150
Output current : Io [
μ
A]
200
Fig.10 FG pull-up resistance
4/16
DSP
DSP
DSP
Refer to
See P.9/16
DSP
HEAD up/down
DSP
FOCUS COIL
DSP
COIL
VM
0.1
µ
F
IN1R
C1P
C2P
C2M
R1
+
TRACKING COIL
0.1
µ
F
STH
STALL
FG
VCC1,2
VCC2
DSP DSP
DSP
2.3V
IN3F IN3R
C1P
C1M
BRK+
BRK-
R2
IN2F
IN2R IN1F
10kΩ½100kΩ
DSP
10kΩ½100kΩ
Refer to
●Block
diagram/Recommended circuit diagram
TSD
Stand-by
+
SPUIN
SPVIN
+
2200pF
2200pF
SPCO
+
P.9/16
Pre Drive
V
Pre Drive
Pre Drive
Charge Pump
Oscillator
Logic
Pre Drive
2200pF
Refer to
Fig. 11
Pre
Drive
5/16
Phase
Control
Slope
Signal
SPW
OUT
SPV SPV
OUT OUT
Pre Drive
SPCOM
P.8/16,P.9/16
Pre
Drive
RCOM
10kΩ½50kΩ
Refer to
P.8/16,P.9/16
PW
IN2
PW PW1
IN1 OUT
VG
0.1
µ
F
5.6~
47
µ
H
DSP
Refer to
P.9/16
PW2
OUT
EXT
CLK
IN4R
SLED
MOTOR
IN4F
CSL2 CST
0.22~0.47
µ
F
SPINDLE
MOTOR
CSL1
0.01~
0.033
µ
F
SLVM
10~
100
µ
F
DSP
DSP DSP
SPVM
Refer to
P.9/16
0.01~
0.033
µ
F
Refer to
P.9/16