BD6670FM.pdf 데이터시트 (총 17 페이지) - 파일 다운로드 BD6670FM 데이타시트 다운로드

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Motor driver ICs
BD6670FM
3Phase spindle motor driver for CD-RW
BD6670FM
BD6670FM is a 3-phase spindle motor driver adopting 180° PWM direct driving system. Noise occurred from the motor
driver when the disc is driver can be reduced. Low power consumption and low heat operation are achieved by using
DMOS FET in output and driving directly.
!Applications
mCD-RW
o!Features
.c1) 180 degree Direct-PWM driving system.
2) Built in power save circuit.
3) Built in current limit circuit.
U4) Built in FG-output.
5) Built in 3phase synthesized FG-output.
t46) Built in hall bias circuit.
7) Built in reverse protection circuit.
e8) Built in short brake circuit.
9) Low consumption by MOS-FET.
e10) Built in capacitor for oscillator.
h11) Built in gain switch and current limit switch.
S!Absolute maximum ratings (Ta=25°C)
taParameter
Symbol
Limits
Power supply voltage
aSupply voltage for motor
VCC
VM
7
15
VG pin voltage
.DOutput current
Power dissipation
VG
IOMAX
Pd
20
2500 1
2200 2
wJunction temperature
TJMAX
150
Operating temperature range
Topr
20~+75
wStorage temperature range
Tstg
55~+150
1 However, do not exceed Pd, ASO and Tj=150°C.
wThe current is guaranteed 3.0A in case of the current is turn on / off
Unit
V
V
V
mA
mW
°C
°C
°C
in a duty-ratio of less than 1/10 with a maximum on-time of 5msec.
2 70mm×70mm×1.6mm glass epoxy board.
Debating in done at 17.6mW / °C for operating above Ta=25°C.
!Recommended operating conditions
Parameter
Symbol Min. Typ. Max.
Power supply voltage
VCC 4.5 5.5
Supply voltage for motor
VG pin voltage
VM
VG
4.0 13.2
8.5
19
Unit
V
V
V
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Motor driver ICs
!Block diagram
BD6670FM
H1+ 1
H12
H2+ 3
H24
Hall comp
+
+
Hall Amp
+
+
H3+ 5
H36
+
+
GSW 7
Gain
control
EXOR
PWM
Comp
+
+
+
OSC
TSD
Matrix
U-Pre
Driver
Hall
bias
Driver
28 FG3
27 FG
26 VH
25 VM
24 A1
23 RNF1
22 A2
GND 8
CP1 9
CP2 10
VG 11
CNF 12
SB 13
VCC 14
Charge
pump
Matrix
L-Pre
Driver
DQ
CK QB
Current
sense
+
CL
Reverse
detect
PS
Torque
AMP +
21 RNF1
20 A3
19 RNF2
18 PS
17 EC
16 ECR
15 VM
Fig.1
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Motor driver ICs
!Pin descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Pin name
H1+
H1
H2+
H2
H3+
H3
GSW
GND
CP1
CP2
VG
CNF
SB
VCC
VM
ECR
EC
PS
RNF2
A3
RNF1
A2
RNF1
A1
VM
VH
FG
FG3
Function
Hall input AMP 1 positive input
Hall input AMP 1 negative input
Hall input AMP 2 positive input
Hall input AMP 2 negative input
Hall input AMP 3 positive input
Hall input AMP 3 negative input
Gain switch pin
GND
Capacitor pin 1 for charge pump
Capacitor pin 2 for charge pump
Capacitor connection pin for charge pump
Capacitor connection pin for phase compensation
Short brake pin
Power supply for signal division
Power supply for driver
Torque control standard voltage input terminal
Torque control voltage input terminal
Power save pin
Resistor connection pin for current sense
Output 3 for motor
Resistor connection pin for current sense
Output 2 for motor
Resistor connection pin for current sense
Output 1 for motor
Power supply for driver
Hall bias pin
FG output pin
FG3 output pin
BD6670FM
3/17

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Motor driver ICs
!Input output circuits
Hall input
H1+ : Pin1, H1: Pin2, H2+ : Pin3,
H2: Pin4, H3+ : Pin5, H3: Pin6
VCC
Hn+
1k
1k
1k 1k
5k
Gain switch
Pin7
VCC
Hn
VCC
VCC 100k
1k 75k 10k
Gain
Switch
(Pin7)
10k
25k
BD6670FM
CP1 output
Pin9
VCC
VCC
50 CP1 (Pin9)
CP2 / VG output
CP2 : Pin10, VG : Pin11
CNF
Pin12
Short brake
Pin13
VCC
VM VG (Pin11)
CNF (Pin12)
50
VCC
SB (Pin13)
30k
CP2 (Pin10)
2k 2k
20k
Torque amplifier
ECR : Pin16, EC : Pin17
ECR (Pin16)
EC (Pin17)
VCC
1k
Power save
Pin18
PS (Pin18)
VCC
30k
20k
RNF2
Pin19
RNF2 (Pin19)
VCC
1k
355
Output pins
A1 : Pin24, A2 : Pin22, A3 : Pin20
Hall bias
Pin26
VM
A1 A2 A3
RNF1
100k
FG / FG3 output
FG : Pin27, FG3 : Pin28
VCC
VH (Pin26)
VCC
VCC
FG (Pin27)
50 FG3 (Pin28)
4/17

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Motor driver ICs
BD6670FM
!Electrical characteristics (unless otherwise noted, Ta=25°C, VCC=5V, VM=12V)
Parameter
<Total>
Circuit current 1
Circuit current 2
<Power save>
ON voltage range
OFF voltage range
<Hall bias>
Hall bias voltage
<Hall AMP>
In-phase input voltage range
Minimum input level
Hall hysteresis level (+)
Hall hysteresis level ()
<Gain switch>
Low voltage range
High voltage range
Open voltage range
<Torque control>
Input voltage range
Offset voltage (+)
Offset voltage ()
Input current
Input / Output gain L
Input / Output gain M
Input / Output gain H
<Output>
Output ON-resistance
Torque limit current L
Torque limit current M
Torque limit current H
<FG / FG3 output>
High voltage
Low voltage
<Charge pump voltage>
Charge pump output voltage
<CP1 output>
Upper saturation voltage
Lower saturation voltage
<CP2 output>
Upper saturation voltage
Lower saturation voltage
Symbol
ICC1
ICC2
VPSON
VPSOFF
VHB
VHAR
VINH
VHYS+
VHYS
VGSWL
VGSWH
VGSWOP
EC, ECR
Ecofs+
Ecofs
ECIN
GECL
GECM
GECH
RON
ITLL
ITLM
ITLH
VFGH
VFGL
VPUMP
VCP1H
VCP1L
VCP2H
VCP2L
Min. Typ. Max. Unit
Conditions
Test Circuit
1 10 µA Stand by mode
7 12 17 mA
Fig.2
Fig.2
− − 1.0 V Stand by mode
2.5
V
Fig.2
Fig.2
0.7 1.0 1.3 V IHB=10mA
Fig.2
1.4 3.6 V
80
mVPP Oneside input level
5 20 40 mV
40 20
5 mV
Fig.3
Fig.3
Fig.3
Fig.3
− − 0.6 V
2.0
V
1.3 V
Fig.4
Fig.4
Fig.4
0
5
100
11
0.28
0.56
1.12
50
50
2.5
0.35
0.70
1.40
5
100
5
0
0.42
0.84
1.68
V Linear range : 0.5V3.0V
mV
mV
µA EC=ECR=1.65V
A/V GSL=L, RNF=0.5
A/V GSL=M, RNF=0.5
A/V GSL=H, RNF=0.5
Fig.6
Fig.6
Fig.6
Fig.6
Fig.7
Fig.7
Fig.7
340
680
1020
1.0
400
800
1200
1.35
460
920
1380
IO600mA (Upper+Lower)
mA GSW=L, RNF=0.5
mA GSW=M, RNF=0.5
mA GSW=H, RNF=0.5
Fig.8
Fig.4
Fig.4
Fig.4
4.6
V IFG=−100µA
− − 0.4 V IFG=+100µA
Fig.5
Fig.5
12.5 17
19 V VCC=5V, VM=12V, CP1=CP2=0.1µF Fig.9
0.25 0.45 0.65
0.2 0.4 0.6
V ICP1=−4mA
V ICP1=+4mA
Fig.10
Fig.10
0.4 0.6 0.8
0.15 0.35 0.55
V ICP2=−4mA
V ICP2=+4mA
Fig.11
Fig.11
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