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Structure
Product Series
Type
Features
Silicon Monolithic Integrated Circuit
4ch Sensorless System Motor Driver for MD
BD6640KVT
・Operates
at low power supply voltage (2.1V min)
・Power
DMOS output with low ON resistance (0.8Ω Typ.)
・Incorporates
a charge pump circuit for VG boost.
・3-phase
full-wave soft-switching sensorless driver for spindle
・3-value
control 3-phase driver for sled (built-in comparator for BEMF voltage detection)
・2ch,
3-value control H-bridges for focus/tracking
・PWM
half-bridge for spindle VM power supply
○Absolute
maximum ratings(Ta=25℃)
Parameter
Power supply voltage for control circuit
Power supply voltage for driver block
Power supply voltage for pre-driver block
Input voltage
Output current
Power dissipation
Operating temperature range
Storage temperature range
Junction temperature
＊Must
not exceed Pd or ASO, Tjmax=150℃.
＊＊Reduced
by 10mW/°C over Ta=25°C, when mounted on a glass epoxy board (70mm70 mm1.6mm).
Symbol
VCC
VM
VG
VIN
Iomax
Pd
Topr
Tstg
Tjmax
Limit
7
7
14
0½VCC
*500
**1250
-25½+75
-55½+150
+150
Unit
V
V
V
V
mA
mW
℃
℃
℃
○Operating
conditions (Ta=-25½+75°C)
Parameter
Power supply voltage
Pulse input frequency
Symbol
VCC1,2
VM
VG
fin
Min.
2.1
-
3
-
Typ.
2.2
-
6.5
-
Max
6.5
5.0
13
500
Unit
V
V
V
kHz
This product described in this specification is not judged whether it applies to COCOM regulations.
Please confirm in case of export.
This product is not designed for protection against radioactive rays.
REV. C
2/4
○Electrical
characteristics
(Unless otherwise specified, Ta=25°C, VCC1, 2=2.2V, VM=1.0V, fin=176kHz)
Parameter
Circuit current
Output ON resistance
½Boost
circuit½
Output voltage
½Oscillation
circuit½
Self-propelled oscillating frequency
External clock synchronous range
Position
detection
comparator
fOSC
fSYNC
VCO
VCD
ICTO
ICTI
ICLO
ICLI
VCLH
IBR
VBO
VBD
RBF
VOLF
VRO
VRP
VMCK
VINH
VINL
IINH1
IINH2
IINL
TRISE
TFALL
tmin
50
－
100
－
160
500
+10
VCC-
-0.9
7.5
-13
6.5
0.9
2.0
+15
VCC-1
30
0.3
30
850
600
VCC
0.4
1
600
－
1
0.7
－
kHz
kHz
mV
V
μA
mA
μA
μA
V
μA
mV
V
kΩ
V
mV
mV
mV
V
V
μA
μA
μA
μsec
μsec
nsec
input pulse width 200 ns
VIN=2.2V
VIN=2.2V EXTCLK pin
VIN=0V
Io=300μA
VM=0V
RIB=500Ω
BRK=VCC
CST=1V
CST=1V
CSL=0.5V
CSL=0.5V
input from EXTCLK pin
VG1
VG2
5.5
4.4
6.5
5.2
6.7
－
V
V
each input L
at operation in all blocks
Symbol
ICC
IST
RON
Limit
Min.
-
-
-
Typ.
4.4
1
0.8
Max.
7.0
10
1.2
Unit
mA
μA
Ω
Conditions
at operation in all blocks
at standby in all blocks
upper and lower ON
resistance in total VG=10V
½Spindle
(3-phase full-wave sensorless driver) block½
-10
0
-3.5
1.0
-3.5
1.2
0.7
－
-15
0
10
－
10
500
400
VCC-0.4
0
－
－
-1
－
－
120
－
－
-2.1
3.6
-7.5
3.0
0.8
－
－
－
20
0.2
18
650
500
－
－
－
350
－
0.2
0.1
－
Detection comparator input range
CST charge current
CST discharge current
CSL charge current
CSL discharge current
CSL clamp H voltage
Brake comparator input current
Brake comparator input offset
Brake comparator input range
FG output pull-up resistance
FG output L voltage
RIB offset voltage
Pre-drive loop gain
M-phase check
Logic H level input voltage
Logic L level input voltage
Logic H level input current
Logic L level input current
Output propagation delay time
Short pulse response
½Sled,
focus, tracking, PWM power supply (stepping, H-bridge, and half-bridge driver) block½
◎This
product is not designed for protection against radioactive rays.
REV. C
IN2F
(2)
H2VM
(56)
H2ROUT H2PG1,2
(55)
(58,54)
VCC1, 2
(46,45)
C1M
(50)
C2M
(48)
STHB
(5)
STALL
(4)
FG CST
(26) (23)
IN2R
(3)
H2FOUT
(57)
C1P
(51)
C2P
(49)
○Block
diagram
SGND
(30)
ASGND
(29)
H1VM
IN1R
IN1F
(61)
(1)
(64)
H1FOUT H1ROUT H1PG1,2
(62)
(60)
(63,59)
Brake
comparator
BRK+(27)
BRK-(28)
○Package
outlines
TSD
N.C.
(9,53)
PreDrive
PreDrive
Charge Pump
ー
SPVIN
(19)
SPWIN
(20)
SPCOM
(21)
BD6640KVT
S1(31)
Pre Drive
ー
Pre
Drive
S2(32)
Decoder
Pre Drive
S3(33)
Lot No.
TQFP64V outlines (Unit：mm)
gain
control
SLOPE
SIGNAL
SLCOM
(37)
SPPG1,2
(8,13
)
SPVM1,2
(6,11)
BEFMU
SLVOUT
SLWO
BEFMW
(34)
(41)
(36)
UT
BEFMV
SLUOUT
SLVM1,2 (39)
(35)
(43)
(40,44)
PW1
OUT
(15)
EXT
CLK
(52)
SLPG1,2
(42,38)
RIB
(22)
CSL2 CSL1
(25) (24)
PW
IN1
(17)
PWVM
(14)
PWPG
(16)
VG
(47)
SPUOUT SPVOUT SPWOUT
(7)
(10)
(12)
+
M A T R IX
VG
Oscillator
ー
Logic
+
Stand-by
+
+
ー
SPUIN
(18)
Type
+
－
+
－
+
－
REV. C
○Pin
No./Pin name
NO.
Pin name
NO.
Pin name
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
29
30
31
32
IN1R
IN2F
IN2R
STALL
STHB
SPVM1
SPUOUT
SPPG1
N.C
SPVOUT
SPVM2
SPWOUT
SPPG2
PWVM
PWOUT
PWPG
PWIN1
SPUIN
SPVIN
SPWIN
SPCOM
RIB
CST
CSL1
CSL2
FG
BRK+
BRK-
ASGND
SGND
S1
S2
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
S3
BEMFU
BEMFV
BEMFW
SLCOM
SLPG2
SLWOUT
SLVM2
SLVOUT
SLPG1
SLUOUT
SLVM1
VCC2
VCC1
VG
C2M
C2P
C1M
C1P
EXTCLK
N.C
H2PG2
H2ROUT
H2VM
H2FOUT
H2PG1
H1PG2
H1ROUT
H1VM
H1FOUT
H1PG1
IN1F
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○Notes
on the use
(1)
Absolute maximum ratings
If the input voltage or the operating temperature range exceeds absolute maximum ratings, IC may be damaged. No
destruction mode (e.g., short-circuiting or open) can be specified in that case. If such special mode as will exceed
absolute maximum ratings is assumed, take the physical safety measures, such as a fuse.
(2)
Power supply lines
The regenerated current by BEMF of the motor will return. Therefore, take measures, such as the insertion of a capacitor
between the power supply and GND as the pass of the regenerated current. Determine the capacitance in full consideration
of all the characteristics of the electrolytic capacitor, because the electrolytic capacitor may loose some capacitance at low
temperatures. If the connected power supply does not have sufficient current absorption capacity, regenerative current will
cause the voltage of the power supply line to rise, which the product and its peripheral circuit may exceed the absolute
maximum ratings. It is recommended to implement physical safety measures such as the insertion of a voltage clamp diode
between the power supply and GND pins.
(3)
Ground potential
Ensure a minimum GND pin potential in all operating conditions.
(4)
Design for heat
Use the design for heat that allows for a sufficient margin in light of the power dissipation (Pd) in actual using conditions.
(5)
Operation in strong magnetic field
Use caution when using the IC in the strong magnetic field as doing so may cause the IC to malfunction.
(6)
ASO
When using the IC, make settings so that the output transistors for the motor will not be used under conditions in excess
of the absolute maximum ratings and ASO.
(7)
Thermal shutdown circuit
This IC incorporates thermal shutdown circuit(TSD circuit).
When the chip temperature becomes the one shown in below, TSD circuit operates and makes the coil output to motor
open. It is designed to shut the IC off from runaway thermal operation. It is not designed to protect the IC or guarantee its
operation. Do not continue to use the IC after operating this circuit or use the IC in an environment where the operation of
this circuit is assumed.
TSD ON temperature[℃]
175
(8)
Ground wiring pattern
When having both small signal and large current GND, it is recommended to isolate the two GND patterns, placing a
single ground point at the application's reference point so that the pattern wiring resistance and voltage variations caused
by large currents do not cause voltage variations of the small signal GND. Be careful not to change the GND wiring
pattern of any external parts, either.
(typ.)
Hysteresis temperature
20
[℃]
(typ.)
REV. C
Notice
Notes
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The content specified herein is for the purpose of introducing ROHM's products (hereinafter
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which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
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Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
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The technical information specified herein is intended only to show the typical functions of and
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