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BD6669FV
Motor driver ICs
3Phase spindle motor driver for CD-ROM
BD6669FV
BD6669FV is a 3-phase spindle motor driver adopting 180 PWM direct driving system. Noise occurred from the motor driver when the disc is driven can be reduced. Low power consumption and low heat operation are achieved by using DMOS FET and driving directly.
Applications CD-ROM
Features 1) Direct-PWM-Linear driving system. 2) Built in power save circuit. 3) Built in current limit circuit. 4) Built in FG-output. 5) Built in hall bias circuit.
6) Built in reverse protection circuit. 7) Built in short brake circuit. 8) Low consumption by MOS-FET. 9) Built in capacitor for oscillator. 10) Built in rotation detect.
Absolute maximum ratings (Ta=25C)
Parameter Power supply voltage Supply voltage for motor VG pin voltage Output current Power dissipation Junction temperature Operating temperature range Storage temperature range Symbol VCC VM VG IOMAX Pd TjMAX Topr Tstg Limits 7 7 20 1000 1 1020 2 150 -20 to +75 -55 to +150 Unit V V V mA mW C C C
1 However, do not exceed Pd, ASO and Tj=150C. 2 70mmx70mmx1.6mm glass epoxy board. Reduce power by 8.16mW for each degree above 25C.
Recommended operating conditions
Parameter Power supply voltage Supply voltage for motor VG pin voltage Symbol VCC VM VG Min. 4.5 3 7.5 Typ. - - - Max. 5.5 6.5 14 Unit V V V
This product described in this specification isn't judged whether it applies to cocom regulations. Please confirm in case of export. This product is not designed for protection against radioactive rays.
Rev.A
1/16
BD6669FV
Motor driver ICs
Block diagram
A31
1 U-Pre
PS
28
RNF1
A32
2
Driver
27
PS
A21
3
26
FG
Driver
A22 4
Matrix
Torque AMP
+ -
25
EC
A11
5
L-Pre
24
ECR
Driver
A12 6
+
-
23
VM2
TSD
VM1 7
Current sense AMP CL
22
VCC
VH
8
Hall bias Hall comp
+ - +
21
RNF2
EXOR
+ -
OSC Matrix
20 SB
H1+
9
H1-
10
-
Hall Amp
H2+ 11
+ - +
PWM Comp
+ -
19
CNF
18
VPUMP
H2-
12
-
17
CP2
H3+
13
+ - +
Charge Pump
+ -
15
D CK Q
16
CP1
H3-
14
-
GND
Reverse Detect
Fig.1
Rev.A
2/16
BD6669FV
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 A31 A32 A21 A22 A11 A12 VM1 VH H1+ H1- H2+ H2- H3+ H3- GND CP1 CP2 VPUMP CNF SB RNF2 VCC VM2 ECR EC FG PS RNF1 Function Output3 for motor Output3 for motor Output2 for motor Output2 for motor Output1 for motor Output1 for motor Power supply fo driver Hall bias pin 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 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 Resistor connection pin for current sense Power supply for signal division Power supply for driver Torque control standard voltage input terminal Torque control voltage input terminal FG output pin Power save pin Resistor connection pin for current sense
Rev.A
3/16
BD6669FV
Motor driver ICs
Input output circuits
Output pins A1 : Pin1, 2, A2 : Pin3, 4, A3 : Pin5, 6 Hall input H1+ : Pin9, H1- : Pin10, H2+ : Pin11, H2- : Pin12, H3+ : Pin13, H3- : Pin14
VCC VM Hn+ 1k A1 A2 A3 1k 5k RNF1 1k 1k Hn VCC
Hall bias Pin8
CP1 output Pin16
CP2 / VPUMP output CP2 : Pin17, VPUMP : Pin18
VCC VCC VCC VPUMP (Pin18)
VM
VH (Pin8)
50
CP1 (Pin16) CP2 (Pin17)
100k
CNF Pin19
Short brake Pin20
RNF2 Pin21
VCC VCC CNF (Pin19) 50 SB (Pin20) 30k RNF2 (Pin21) 20k 2k 2k 1k VCC 355
Torque amplifier ECR : Pin24, EC : Pin25
FG output FG : Pin26
Power save Pin27
VCC VCC ECR (Pin24) EC (Pin25) 50 1k
VCC
VCC
FG (Pin26)
PS (Pin27)
30k
20k
Rev.A
4/16
BD6669FV
Motor driver ICs
Electrical characteristics (unless otherwise noted, Ta=25C, VCC=5V, VM=5V)
Parameter
Symbol Min.
Typ.
Max.
Unit
Conditions
Test Circuit Fig.2 Fig.2

Circuit current 1 Circuit current 2

ICC1 ICC2 VPSON VPSOFF VHB IHA VHAR VINH VHYS+ VHYS- EC, ECR Ecofs+ Ecofs- ECIN VSBON VSBOFF GEC RON VTL VFGH VFGL Vpump
- 5 - 2.5 0.6 -8.0 1.4 100 5 -40 0 5 -100 -12 2.5 - 0.8 0.3 0.16 4.6 - 6
- 11
- - 1.0 -2.0 - - 20 -20 - 50 -50 -2.5 - - 1.0 0.5 0.2 - - 10
5 17 1.0 - 1.4 - 3.6 - 40 -5 5 100 -5 - - 1.0 1.2 0.7 0.24 - 0.4 14
A mA V V V A V mVPP mV mV V mV mV A V V A/V V V V V
Sutand by mode
ON voltage range OFF voltage range

Sutand by mode
Fig.2 Fig.2
Hall bias voltage

IHB=10mA
Fig.2 Fig.4 Fig.4
Input bias current In-phase input voltage range Minimum input level Hall hysteresis level (+) Hall hysteresis level (-)

Hall input Amp
Fig.4 Fig.8 Fig.8
Input voltage range Offset voltage (+)
Offset voltage (-) Input current ON voltage range OFF voltage range Input / Output gain Output ON-resistance Torque limit voltage
High voltage
Linear range 0.5V3.3V
Fig.6 Fig.6 Fig.6
EC=ECR=1.65V Short brake
Fig.6 Fig.7 Fig.7 Fig.6
IO=600mA (Upper+Lower)
Fig.5 Fig.3
IFG=-100A
Fig.6
Low voltage Charge pump output voltage
IFG=+100A VCC=VM=5V
Fig.6 Fig.9
Measuring circuit 1. Value of resistor (Fig.2Fig.9)
A1 5, 6pin A2 3, 4pin A3 1, 2pin 13, 16pin
RNF RL
GND RL=5, RNF=0.33
Rev.A
5/16
BD6669FV
Motor driver ICs
2. Input-output table
Input condition Pin No. Condition1 Condition2 Condition3 Condition4 Condition5 Condition6 23 H1+ L H M M H L 24 H1- M M M M M M 25 H2+ H L L H M M 26 H2- M M M M M M 27 H3+ M M H L L H 28 H3- M M M M M M Output condition ECECR A2 H L L H H L A3 H L H L L H 17.18 14.15 11.12 17.18 14.15 11.12
Input voltage H=2.8V M=2.5V L=2.2V
Output logic H : Upper Tr ON L : Lower Tr ON
3. Measuring circuit
10k
VPS 0.01F RNF 1.65V
A
5V
10
ICC1 : Value of A1 VPS=0 [V] Hall input condition : condition1
CP2 GN CP
VCC
CNF
VPUM
RNF1
ECR
RNF2
EC
FG
PS
SB
VM
ICC2 : Value of A1 VPS=5 [V] Hall input condition : condition1
VHB : Value of V1 VPS=5 [V] IHB=10 [mA]
H1+
H1-
H2+
H2-
H3+
A3
A3
A2
A2
A1
A1
VM
H3
VH
-
RL
RL
RL
5V H1
V
VPSON : Range of Vps output pins become input-output table.
H1 H2 H2 H3 H3
IHB
VPSOFF : Range of Vps output pins become open.
Fig.2
Rev.A
6/16
BD6669FV
Motor driver ICs
VRNF2
5V
1.65V
5V
VTL : Range of VRNF2 that VM current (IM) become 0A. VPS=5 [V]
VCC CNF VPUM CP2 RNF1 ECR RNF2 GN H3
-
FG
EC
H1+
H1-
H2+
H2-
RL
RL
RL
A1
H1+ H1- H2+ H2- H3+ H3- 5V
Fig.3
10k
0.01F
H3+
A3
A3
A2
A2
A1
A1
VM
VH
CP
PS
VM
SB
RNF
5V
1.65V
5V
10V
IHA : Value of 'A1' (Hn =2.5V, Hn =2.0V) + - Value of 'A2' (Hn =2.0V, Hn =2.5V) n=1, 2, 3
GN CP
+
-
VCC
CNF
VPUM
ECR
RNF2
CP2
FG
RNF1
EC
PS
SB
VM
VHAR : HALL voltage range that output pins become input-output table.
H1-
H2-
H3+
H3-
H1
H2
A3
A3
A2
A2
A1
A1
VM
VH
VINH : HALL input level that output pins become input-output table.
VINH : Hn -Hn - Hn =2.5 V
+ -
+
+
A1
A2
A1
A2
A1
A2
RL
RL
RL
5V H1+ H1- H2+ H2- H3+ H3-
Fig.4
Rev.A
7/16
BD6669FV
Motor driver ICs
5V
1.65V
5V
VCC
CNF
VPUM
CP2
ECR
RNF1
RNF2
GN
EC
FG
CP
PS
SB
VM
VOH : In case output measurement pin='H' by input condition and IO=-600mA, value of 'VOH' VOL : In case output measurement pin='L' by input condition and IO=600mA, value of 'VOL'
H1+
H1-
H2+
H2-
H3+
A3
A3
A2
A2
A1
A1
VM
H3
VH
-
Ron=(VOH + VOL) / 0.6
5V
H1+ H1- H2+ H2- H3+ H3-
A1 5, 6pin A2 3, 4pin A3 1, 2pin
VOH
600mA
A1 5, 6pin A2 3, 4pin A3 1, 2pin
VOL
600mA
VM
RNF1
Fig.5
A1
IFG
10k
VEC VECR
EC, ECR : Torque control operating range. ECOFS : EC voltage range that VM current (IM) is 0A. ECIN : Value of 'A2' (EC=ECR=1.65V) Value of 'A3' (EC=ECR=1.65V)
VCC VPUM CNF
0.01F
RNF
5V
A2
A3
5V
10V
ECR
RNF2
CP2
RNF1
GN
FG
EC
CP
PS
VM
SB
VFGH : Value of V1 (IFG=-100A) Hall input condition 3. VFGL : Value of V1 (IFG=+100A) Hall input condition 4.
H1+
-
H2+
H2-
H3+
H1
H3
A3
A3
A2
A2
A1
A1
VM
VH
-
RL
RL
RL
A1
GEC= { (V1-V2) / (1.5-1.2) } / 0.5 When ECR=1.65V value of V1 (EC=1.2V) value of V2 (EC=1.5V)
5V H1 H1 H2 H2 H3 H3
Fig.6
Rev.A
8/16
BD6669FV
Motor driver ICs
10k
VSB 0.01F RNF
5V
1.65V
5V
10V
VSBON : Volatge range of 'VSB' that output pins become 'L'.
VCC CNF VPUM CP2 ECR RNF1 RNF2 GN FG EC CP PS SB VM
VSBOFF : Range of 'VSB' that output pins become input-output table.
H1+
H1-
H2+
H2-
+
RL
RL
RL
5V H1+ H1- H2+ H2- H3+ H3-
Fig.7
10k
0.01F
RNF
5V
1.65V
5V
10V
H3-
H3
A3
A3
A2
A2
A1
A1
VM
VH
VHYS : Voltage difference H3+ to H3- that FG voltage change V1.
VCC CNF VPUM CP2 ECR RNF1 RNF2 GN
V1
FG
EC
H1+
H1-
H2+
H2-
H3+
CP
PS
SB
VM
RL
RL
RL
5V H1+ H1- H2+ H2- H3+ H3-
Fig.8
H3-
A3
A3
A2
A2
A1
A1
VM
VH
Rev.A
9/16
BD6669FV
Motor driver ICs
10k
0.01F
RNF 5V 1.65V 5V
V1
0.1F 0.1F
VPUMP : Value of V1.
VCC CNF VPUM CP2 ECR RNF1 RNF2 GN H3
-
FG
EC
H1+
H1-
H2+
H2-
RL
RL
RL
5V H1+ H1- H2+ H2- H3+ H3-
Fig.9
H3+
A3
A3
A2
A2
A1
A1
VM
VH
CP
PS
SB
VM
Rev.A
10/16
BD6669FV
Motor driver ICs
Circuit operation 1. Application (1) Hall input Hall element can be used with both series and parallel connection. Determining R1 and R2, make sure to leave an adequate margin for temperature and dispertion in order to satisfy in-phase input voltage range and minimum input level. A motor doesn't reach the regular number of rotation, if hall input level decrease under high temperature.
VCC R1
H1
VCC
R1
H1
H2
H3
H2
H3
R2 VH Parallel connection
R2 VH
Series connection
Fig.10
2.Torque voltage By the voltage difference between EC and ECR, the current driving motor changes as shown in Fig.11 below.
IM [A] ITL
Forward torque
Reverse torque
0 ECR EC [V]
Fig.11
The gain of the current driving motor for the voltage of EC can be changed by the resistance of RNF.
Rev.A
11/16
BD6669FV
Motor driver ICs
(3) Current limit The maximum value of the current driving motor can be changed by the resistance of RNF. ITLL=0.2 / RNF (A) (4) Short brake The short brake is switched by SB pin and its operation is shown in table below.
SB L H EC < ECR Rotating forward Short brake EC > ECR Reverse brake Short brake
Output upper (3phase) FET turn off and lower (3phase) FET turn on in short brake mode, as shown Fig.12.
VM
OFF
OFF
OFF
ON
ON
ON
RNF
MOTOR
Fig.12
(5) Reverse detection Reverse detection is constructed as shown in Fig.13. Output is opened when EC>ECR and the motor is rotating reverse.
H2+ H2-
+ -
+ -
D
Q
OUT
H3+ H3-
CK
EC ECR
+ -
Fig.13
Rev.A
12/16
BD6669FV
Motor driver ICs
Motor rotation at reverse detection
Forward rotation (forward torque) when EC < ECR
Deceleration (reverse torque) when EC > ECR
Reverse detection is triggered and set outputs to open, when motor rotates in the reverse direction.
Motor idles in the reverse direction by inertia.
Stop
Rev.A
13/16
BD6669FV
Motor driver ICs
(6) Timing chart
H1+
H2+
H3+ 30 A1 Output current
A1 Output voltage
A2 Output current
A2 Output voltage
A3 Output current
A3 Output voltage
Fig.14
Rev.A
14/16
BD6669FV
Motor driver ICs
Application example
A31
RNF1
PS
A32
U-Pre
PS
0.33 VCC
Driver
A21
FG
A22
Driver
Matrix
Torque AMP
EC
+ -
ECR
Servo signal
A11 L-Pre
Driver
A12
VM2
1.65V
+
-
VM1
TSD
VCC
10F
Current sense AMP
1F
RNF2
VH
100
H1+
Hall bias Hall comp
+ -
CL
EXOR
+ -
OSC
SB
10k
VCC
Matrix
CNF
H1
H1-
+ -
H2+
Hall Amp
+ -
PWM Comp
+ -
VPUMP
100pF
H2
H2-
+ -
CP2
0.1F
H3+
+ -
Charge Pump
+ -
D Q
CP1
0.1F
H3
H3-
+ -
GND
100
CK
Reverse Detect
Fig.15
Operation notes 1. Absolute maximum ratings Absolute maximum ratings are those values which, if exceeded, may cause the life of a device to become significantly shorted. Moreover, the exact failure mode cannot be defined, such as a short or an open. Physical countermeasures, such as a fuse, need to be considered when using a device beyond its maximum ratings. 2. GND potential The GND terminal should be the location of the lowest voltage on the chip. All other terminals should never go under this GND level, even in transition.
Rev.A
15/16
BD6669FV
Motor driver ICs
3. Thermal design The thermal design should allow enough margin for actual power dissipation. 4. Mounting failures Mounting failures, such as misdirection or mismounts, may destroy the device. 5. Electromagnetic fields A strong electromagnetic field may cause malfunctions. 6. Coil current flowing into VM A coil current-flows from motor into VM when torque control input changes from ECECR, and VM voltage rises if VM voltage source doesn't have an ability of current drain. Make sure that surrounding circuits work correctly and aren't destroyed, when VM voltage rises. Physical countermeasures, such as a diode for voltage clamp, need to be considered under these conditions. 7. CNF pin An appropriate capacitor (100pF (typ.)) at CNF pin make motor current smooth. Make sure the motor current doesn't oscillate, even in transition.
Electrical characteristics curve
Pd (W) 1.02
0.50
0
0
25
50
75
100
125
150 Ta (C)
70mmx70mmx1.6mm glass epoxy board. Reduce power by 8.16mW for each degree above 25C.
Fig.16 Power dissipation curve
External dimensions (Units : mm)
10.00.2
28 15
7.60.3 5.60.2
1
14
1.150.1 0.1
0.150.1
0.1
0.65
0.220.1
SSOP-B28
0.3Min.
Rev.A
16/16
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.1

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