KA3011BDTF [FAIRCHILD]
3-Phase BLDC Motor Driver; 三相BLDC电机驱动器
| 型号： | KA3011BDTF |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | 3-Phase BLDC Motor Driver |
| 文件： | 总16页 (文件大小：320K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
KA3011BD
3-Phase BLDC Motor Driver
Features
Description
• 3-phase, full-wave, linear BLDC motor driver
The KA3011BD is a monolithic IC, suitable for a 3-phase
spindle motor driver of a CD-media system.
• Power save at stop mode
• Built-in current limiter
• Built-in TSD (Thermal shutdown) circuit
• Built-in 3X or 1X hall FG output
• Built-in hall bias circuit
28-SSOPH-375
• Built-in rotational direction detector
• Built-in reverse rotation preventer
• Built-in short braker
• Corresponds to 3.3V or 5V DSP
Typical Applications
Ordering Information
• Compact disk ROM (CD-ROM) spindle motor
• Compact disk RW (CD-RW) spindle motor
• Digital video disk ROM (DVD-ROM) spindle motor
• Digital video disk RAM (DVD-RAM) spindle motor
• Digital video disk Player (DVDP) spindle motor
• Other compact disk media spindle motor
• Other 3-phase BLDC motor
Device
Package
Operating Temp.
−25°C ~ +75°C
−25°C ~ +75°C
KA3011BD
28-SSOPH-375
KA3011BDTF 28-SSOPH-375
Rev. 1.0.1
February. 2000.
©2000 Fairchild Semiconductor International
1
KA3011BD
Pin Assignments
FIN(GND)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
KA3011BD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
FIN(GND)
Pin Definitions
Pine Number
Pin Name
I/O
-
Pin Function Description
1
NC
No connection
Output (A3)
2
A3
O
-
3
NC
No connection
Output (A2)
4
A2
O
-
5
NC
No connection
No connection
Output (A1)
6
NC
-
7
A1
O
-
8
GND
H1+
H1−
H2+
H2−
H3+
H3−
VH
Ground
9
I
Hall signal (H1+)
Hall signal (H1−)
Hall signal (H2+)
Hall signal (H2−)
Hall signal (H3+)
Hall signal (H3−)
Hall bias
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
I
I
I
I
I
I
NC
-
No connection
PC1
SB
-
Phase compensation capacitor
Short brake
I
FGS
DIR
ECR
EC
I
Frequency generation selection
Rotational direction output
Output current control reference
Output current control voltage
Power save (Start/Stop switch)
O
I
I
S/S
FG
I
O
-
Frequency generation waveform (3X or 1X hall frequency)
Supply voltage (Signal)
VCC
NC
-
No connection
VM
-
Supply voltage (Motor)
CS1
-
Output current detection
2
KA3011BD
Internal Block Diagram
GND
28
27
26
25
24
23
22
21
20
19
18
17
16
15
−
+
Absolute
Values
Current sense
Amp
Output
Current limit
TSD
Hall amp
12
1
2
3
4
5
6
7
8
9
10
11
13
14
GND
3
KA3011BD
Equivalent Circuits
Hall input
Driver output
27
28
9
10
12
14
1kΩ
1kΩ
50Ω
50Ω
11
13
2
4
7
Torque control input
Hall bias input
50Ω
5Ω
21
22
+
15
50Ω
−
50kΩ
Current detector
Start / Stop
50Ω
50kΩ
50Ω
50kΩ
23
18
30kΩ
30kΩ
Dir or FG output
FGS input
V
CC
20kΩ
50Ω
24
50Ω
50kΩ
30kΩ
20
19
4
KA3011BD
Absolute Maximum Rating (Ta=25°C)
Parameter
Symbol
VCCmax
VMmax
PD
Value
7
Unit
V
Maximum supply voltage (Signal)
Maximum supply voltage (Motor)
Power dissipation
18
1.7 note
V
W
A
Maximum output current
Operating temperature range
Storage temperature range
NOTE:
IOmax
TOPR
1.3
−25 ~ +75
−55 ~ +150
°C
°C
TSTG
1. When mounted on 76.2mm × 114mm × 1.57mm PCB (Phenolic resin material)
2. Power dissipation is reduced 13.6 mW / °C for using above Ta=25°C
3. Do not exceed P and SOA (Safe operating area).
D
Power Dissipation Curve
Pd (mW)
3,000
2,000
1,000
SOA
0
0
25
50
75
100
125
150
175
Ambient temperature, Ta [°C]
Recommended Operating Conditions (Ta=25°C)
Parameter
Symbol
VCC
Min.
4.5
Typ.
5
Max
5.5
15
Units
Supply voltage
Motor supply voltage
V
V
VM
3.0
12
5
KA3011BD
Electrical Characteristics
(Unless otherwise specified, Ta=25°C, V =5V, V =12V)
CC
M
Parameter
Quiescent circuit current
START / STOP
Symbol
Condition
Min.
Typ.
Max.
Units
ICC
–
2
5
8
mA
On voltage range
Off voltage range
HALL BIAS
VSSon
VSSoff
Output drive on
Output driver off
2.5
0.0
-
-
V
V
V
CC
1.0
Hall bias voltage
VHB
IHB=20mA
0.4
1.0
1.8
V
HALL AMP
Hall bias current
IHA
–
–
–
-
0.5
2
4.0
-
µA
V
Common mode input range
Minimum input level
TORQUE CONTROL
VHAR
VINH
1.5
100
-
-
mVpp
E
E
input voltage range
ECR
EC
–
–
0.2
0.2
−80
20
-
4.0
4.0
−20
80
V
V
CR
input voltage range
-
C
Offset voltage (–)
Offset voltage (+)
ECoff–
ECoff+
ECin
EC=2.5V
−50
50
mV
mV
µA
EC=2.5V
E
E
input current
EC=2.5V
−5
0.5
0.5
0.51
5
C
input current
ECRin
GEC
ECR=2.5V
ECR=2.5V, RCS=0.5Ω
−5
5
µA
CR
In/output gain
0.41
0.61
A / V
FG
FG output voltage (H)
FG output voltage (L)
Input voltage range
OUTPUT BLOCK
VFGh
VFGl
IFG= –10µA
IFG=10µA
–
3.0
-
-
V
V
V
CC
-
-
0.5
-
50
%
Saturation voltage (upper TR)
Saturation voltage (lower TR)
Torque limit current
DIRECTION DETECTOR
Dir output voltage (H)
Dir output voltage (L)
FG SELECTION
VOh
VOl
ITL
IO= –300mA
IO=300mA
RCS=0.5Ω
-
-
0.9
0.2
700
1.6
0.6
840
V
V
560
mA
VDIRh
VDIRl
IFG=–10µA
IFG=10µA
3.0
-
-
-
V
CC
V
V
0.5
3X frequency selection
1X frequency selection
SHORT BRAKE
VFG3X
VFG1X
FGS > 2.5V
FGS < 1.0V
2.5
-
-
-
V
V
V
CC
1.0
On voltage range
VSBon
VSBoff
-
-
2.5
0
-
-
V
V
V
CC
Off voltage range
1.0
6
KA3011BD
Electrical Characteristics (Continued)
Calculation of Gain & Torque Limit Current
VM
VM
−
I
O
Output
Current sense
V
S
+
R
S
CS1 (Pin 28)
Current / Voltage
Convertor
Negative
Feedback loop
−
I
O
Vin
+
R1
U
V
−
Power
Transistors
+
EC
+
+
Driver
Gm
W
−
ECR
Absolute
Values
Commutation
Distributor
+
Vmax
−
H1
H2
H3
VM
Max. output current limiting
0.255 from GM times R1 is a fixed value within IC.
Vmax (see above block diagram) is setted to 350mV.
0.255
RS
Gain = --------------
Vmax
RS RS
350[mV]
Itl[mA] = --------------- = -----------------------
7
KA3011BD
Application Information
1. TORQUE & OUTPUT CURRENT CONTROL
V
+
M
R
O
CS
V
CS
V
M
−
Current Sense AMP
I
Torque AMP
−
Gain
Controller
E
Driver
+
+
CR
M
−
ECR-EC
TSD
E
C
• By amplifying the voltage difference between E and Ecr from servo IC, the torque sense amp produces the input (V
)
C
AMP
for the current sense amp.
• The output current (I ) is converted into the voltage (V ) through the sense resistor (R ) and compared with the V
.
O
CS CS AMP
By the negative feedback loop, the sensed output voltage, V is equal to the input V
.
CS AMP
Therefore, the output current (I ) is linearly controlled by the input V
.
O
AMP
• As a result, the signals, E and E can control the velocity of the Motor by controlling the output current (I ) of the
CR
C
O
Driver.
• The range of the torque voltage is as shown below.
V
RNF
[V]
Reverse
Forward
Rotation
E
CR
> E
Forward rotation
C
Ecoff−
Ecoff+
E
CR
< E
Stop after detecting
reverse rotation
C
0.51[A/V]
3 mV
−50mV
50mV
0
E
-E
C
CR
The input range of E
CR,
E is 0.2V ~ 4V.
C
2. SHORT BRAKE
MOTOR
OFF
V
CC
2
18
ON
4
50kΩ
7
OFF
ON
30kΩ
Pin # 18
Short brake
8
KA3011BD
High
Low
On
Off
When the pick-up mechanism moves from the inner to the outer spindle of the CD, the brake function of the reverse voltage is
commonly employed to decrease the rotating velocity of the spindle motor.
However, if the spindle motor rotates rapidly, the brake function of the reverse voltage may produce more heat at the Drive IC.
To remove this shortcoming and to enhance the braking efficiency, the short brake function is added to KA3011BD. When the
short brake function is active, all upper power TRs turn off and all lower power TRs turn on, and the Motor slows down. But
FG and DIR functions continue to operate normally.
3. POWER SAVE
MOTOR
OFF
V
CC
2
23
4
50kΩ
Start
Stop
7
OFF
30kΩ
Pin # 23
High
Start/Stop
Operate
Stop
Low
When power save function is active, all power TRs turn off but FG and DIR functions continue to operate normally.
4. TSD (THERMAL SHUTDOWN)
Gain
Controller
BIAS
Q2
When the chip temperature rises above 175°C, the Q2 turns on and the output driver shuts down. When the chip temperature
falls off to about 150°C, then the Q2 turns off and the driver operates normally. TSD has the temperature hysteresis of about
25°C.
9
KA3011BD
5. ROTATIONAL DIRECTION DETECTION
V
CC
DIR
20
+
H2+
−
H2−
Rotation
Forward
Reverse
DIR
Low
20
D
Q
High
CK
+
H3+
−
D-F/F
H3−
• The forward and the reverse rotations of the CD are detected by the D-F/F and the truth table is shown above.
• The rotational direction of the CD can be explained by the output waveform of the hall sensors. The three outputs of hall
sensors be H1, H2 and H3 respectively.
When the spindle rotates in reverse direction, the hall sensor output waveforms are shown in Fig.(a). The phases order are
in H1→H2→H3 with a 120°C phase difference.
H1
H2
H3
( a) Reverse rotation
On the other hand, if the spindle rotates in forward rotation, the phase relationship is H3→H2→H1 as shown in Fig.(b).
H1
H2
H3
( b) Forward rotation
The output of the rotational direction detector is low, when the spindle rotates forward, and high in the reverse rotation.
10
KA3011BD
6. REVERSE ROTATION PREVENTION
Current
Sense
Amp
E
+
C
E
−
CR
H2+
+
Low Active
A
H2−
−
D
Q
CK
H3+
+
Gain
Controller
Driver
M
−
H3−
D-F/F
• When the output of the OR Gate, A is LOW, it steers all the output current of the current sense Amp to the Gain Controller
zero. The output current of the Driver becomes zero and the motor stops.
• As in the state of the forward rotation, the D-F/F output, Q is HIGH and the motor rotates normally. At this state, if the
control input is changed such that EC>ECR, then the motor rotates slowly by the reverse commutation in the Driver. When
the motor rotates in reverse direction, the D-F/F output becomes Low and the OR Gate output, becomes LOW. This
prevents the motor from rotating in reverse direction. The operation principle is shown in the table and the flow chart.
Rotation
H2
H3
D-F/F
(Q)
Reverse rotation preventer
E <E
E >E
C CR
C
CR
Forward
Reverse
H
L
H→L
H→L
H
L
Forward
-
-
Brake and stop
Forward rotation at E < E
CR
C
Rotating speed is decreased due to reverse torque at E >E . (Motor still rotates forward)
CR
C
At the moment that the motor rotates in reverse, the reverse rotation preventer makes the output power transistor open.
Rotating reverse at short time due to motor inertia
Stop within 1/6 turn reverse rotating
11
KA3011BD
7. FG OUTPUT
H1−
H1+
FG1X
FG3X
FG
Mux
H2−
H2+
H3−
FGS
H3+
FGS
FG
GND or Open
FG1X (1X hall frequency)
FG3X (3X hall frequency)
V
CC
8. HALL SENSOR CONNECTION
V
V
CC
CC
HALL 1
HALL 2
HALL 3
HALL 1
HALL 2
HALL 3
15
15
VH
VH
9. Connect a by-pass capacitor, 0.1mF between the supply voltage source.
25
Vcc
0.1µF
10. The heat radiation fin is connected to the internal GND of the package.
Connect that fin to the external GND.
12
KA3011BD
11. INPUT-OUTPUT TIMING CHART
H1 +
H2 +
H3 +
A1 output current
(H1 −)+(H2 +)
A1 output voltage
A2 output current
(H2 −)+(H3 +)
A2 output voltage
A3 output current
(H3 −)+(H1 +)
A3 output voltage
13
KA3011BD
Test Circuits
10µA
20mA
V
V
VM3
14
VM5
13
5V
12V
VR1
IM3 A
IM2
A
VR3
IM2
VR2
IM1
VR5
10uA
15
A
A
R
CS
0.5Ω
VM7
V
V
VM4
VM6
VR4
0.1µF
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VH
CS1
VM
NC
VCC
FG
SS
EC
ECR
DIR
FGS
SB
PC1
NC
KA3011BD
NC
1
A3
2
NC
3
A2
4
NC
5
NC
6
A1
7
GND
8
H1+
9
H1−
H2+
11
H2−
H3+ H3−
10
12
13
14
IM9
IM4
IM5
IM6
IM7
IM8
SW1
SW2
SW3
A
A
A
A
A
A
V
V
V
VM8
c
c
c
a
a
a
VR8 VR9
VR10 VR11 VR12 VR13
b
b
b
RL=5Ω
RL=5Ω
RL=5Ω
SW13
a
b
V
VM1
12V
V
VM2
300mA
300mA
14
KA3011BD
Typical Application Circuits
0.5Ω
28
27
26
25
1
2
3
4
5
6
7
CS1
VM
NC
A3
V
(12V)
(5V)
M
NC
NC
VCC
A2
NC
NC
A1
V
CC
FG 24
SS 23
ST
SP
22
EC
1.675V
OR
2.1V
KA3011BD
8
9
21
20
19
18
17
16
15
ECR
GND
DIR
H1+
Servo
Signal
HALL 1
HALL 2
HALL 3
FGS
10
11
H1−
SB
H2+
R2
PC1
12 H2−
0.1µF
13
NC
VH
H3+
14
H3−
R1
15
KA3011BD
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
INTERNATIONAL. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
12/1/00 0.0m 001
Stock#DSxxxxxxxx
2000 Fairchild Semiconductor International
相关型号：
KA301AD
Operational Amplifier, 1 Func, 10000uV Offset-Max, BIPolar, PDSO8, 0.225 INCH, SOP-8
SAMSUNG
©2020 ICPDF网 联系我们和版权申明