Fairchild Semiconductor KA3011BD Datasheet
KA3011BD
3-Phase BLDC Motor Driver
www.fairchildsemi.com
Features
• 3-phase, full-wave, linear BLDC motor driver
• 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
• Built-in rotational direction detector
• Built-in reverse rotation preventer
• Built-in short braker
Corresponds to 3.3V or 5V D
•
SP
Description
The KA3011BD is a monolithic IC, suitable for a 3-phase
spindle motor driver of a CD-media system.
28-SSOPH-375
Typical Applications
• 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
©2000 Fairchild Semiconductor International
Ordering Information
Device Package Operating Temp.
KA3011BD 28-SSOPH-375 −25°C ~ +75°C
KA3011BDTF 28-SSOPH-375 −25°C ~ +75°C
Rev. 1.0.1
February. 2000.
1
Pin Assignments
KA3011BD
CS1
VM
NC
VCC
FG
S/S
EC
FIN(GND)
ECR
DIR
FGS
SB
PC1
KA3011BD
1 2 3 4 5 6 7 8 9 10 11 12 13 14
NC
A3
NC
A2
NC
NC
A1
FIN(GND)
GND
H1+
−
H1
H2+
−
H2
Pin Definitions
Pine Number Pin Name I/O Pin Function Description
1 NC - No connection
2 A3 O Output (A3)
3 NC - No connection
4 A2 O Output (A2)
5 NC - No connection
6 NC - No connection
7 A1 O Output (A1)
8 GND - Ground
9 H1+ I Hall signal (H1+)
10 H1− I Hall signal (H1−)
11 H2+ I Hall signal (H2+)
12 H2− I Hall signal (H2−)
13 H3+ I Hall signal (H3+)
14 H3− I Hall signal (H3−)
15 VH I Hall bias
16 NC - No connection
17 PC1 - Phase compensation capacitor
18 SB I Short brake
19 FGS I Frequency generation selection
20 DIR O Rotational direction output
21 ECR I Output current control reference
22 EC I Output current control voltage
23 S/S I Power save (Start/Stop switch)
24 FG O Frequency generation waveform (3X or 1X hall frequency)
25 VCC - Supply voltage (Signal)
26 NC - No connection
27 VM - Supply voltage (Motor)
28 CS1 - Output current detection
NC
H3+
VH
1516171819202122232425262728
−
H3
2
KA3011BD
Internal Block Diagram
GND
EC
S/S
FG
VCC
NC
VM
CS1
−
+
FG
1 2 3 4 5 6 7 8 9 1011121314
NC
A3
NC
A2
NC
Stop
Start
Generator
Current sense
Amp
A1
NC
Output
Current limit
GND
Absolute
Values
Upper
Distributor
Lower
Distributor
ECR
GND
DIR
Logic
Reverse rotati on
Selector
Commutation
H1+
FG
FGS
Selector
H1−
SB
PC1
Brake
Short
Detector
Detection
Hall amp
H2−
H2+
NC
TSD
H3+
VH
1516171819202122232425262728
Hall
H3−
3
Equivalent Circuits
Hall input Driver output
KA3011BD
28
9
50Ω
11
13
1kΩ
1kΩ
50Ω
10
12
14
2274 7
Torque control input Hall bias input
50Ω
21
50Ω
22
+
−
15
5Ω
50kΩ
Current detector Start / Stop
50Ω
23
50kΩ
18
30kΩ
Dir or FG output FGS input
V
CC
20kΩ
50Ω
24
20
19
50Ω
50Ω
50kΩ
30kΩ
50kΩ
30kΩ
4
KA3011BD
Absolute Maximum Rating (Ta=25°°°°C)
Parameter Symbol Value Unit
Maximum supply voltage (Signal) V
Maximum supply voltage (Motor) V
Power dissipation P
Maximum output current I
Operating temperature range T
Storage temperature range T
NOTE:
1. When mounted on 76.2mm × 114mm × 1.57mm PCB (Phenolic resin material)
2. Power dissipation is reduced 13.6 mW / °C for using abov e Ta= 25 °C
3. Do not exceed P
and SOA (Safe operating area).
D
CCmax
Mmax
D
Omax
OPR
STG
7V
18 V
note
1.7
1.3 A
−25 ~ +75 °C
−55 ~ +150 °C
Power Dissipation Curve
Pd (mW)
3,000
2,000
W
1,000
0
0 25 50 75 100 125 150 175
SOA
Recommended Operating Conditions (Ta=25°°°°C)
Parameter Symbol Min. Typ. Max Units
Supply voltage V
Motor supply voltage V
CC
M
Ambient temperature, Ta [°C]
4.5 5 5.5 V
3.0 12 15 V
5
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