Page 1
Ordering number: EN5225
Monolithic Digital IC
LB1896
3-phase Brushless Motor Driver for
CD-ROM Spindle Drive Use
Overview
The LB1896 is a 3-phase brushless motor driver IC that is
ideal for driving CD-ROM spindle motors.
Functions and Features
v 120°voltage linear technique
v V-type control voltage
v Switchable control gain
v Control, noncontrol, acceleration/deceleration mode select
pins built in.
v Start/Stop pin built in, Hall bias built in.
Specifications
Package Dimensions
unit : mm
3219-QFP34H-C
[LB1896]
SANYO : QFP34H – C
Absolute Maximum Ratings atTa=25°C
Parameter Symbol Conditions Ratings Unit
V
1 max 20 V
Maximum supply voltage
Applied output voltage V
Output current I
Allowable power dissipation Pd max Independent IC 0.77 W
Operating temperature Topr –20 to +75
Storage temperature Tstg –55 to +150
CC
V
2 max 7.0 V
CC
OU, V, W
OUT
1.2 A
20 V
Operating Conditions atTa=25°C
Parameter Symbol Conditions Ratings Unit
V
1 5 to 18 V
Supply voltage
V
input voltage V
Cref
V
input voltage V
NS
CC
V
2VCC1 ^ VCC2 4.3 to 6.5 V
CC
Cref
NS
VCC2/2 ±1.0 V
0toVCC2 –1.0 V
C
°
C
°
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13096HA(II) No.5225-1/8
Page 2
LB1896
Allowable power dissipation, Pd max — W
Ambient temperature, Ta — °C
Electrical Characteristics atTa=25°C, VCC1=12V,VCC2=5V
Parameter Symbol Conditions min typ max Unit
V
= open, V
Supply current 1 I
Supply current 2 I
Supply current 3 I
1
CC
2V
CC
3
CC
C
V
=5V
S/S
= open, V
C
= open, V
V
C
V
=0V,(ICCof VCC1)
S/S
[Drive block]
Output saturation voltage
V
V
Output TRS sustaining voltage V
Output static voltage V
Hall amplifier input offset voltage V
Hall amplifier input bias current I
Hall amplifier common-mode input
voltage range
Hall input/output voltage gain G
Control/output drive gain 1 G
Control/output channel difference 1 ∆G
Control/output drive gain 2 G
Control/output channel difference 2 ∆G
1I
O(sat)
2I
O(sat)
O(sus)
OQ
H offset
H bias
V
Hch
VHO
1 RZ1 = RZ2, GC1 = L, GC2 = L 26 29 dB
VCO
1 RZ1 = RZ2, GC1 = L, GC2 = L –1.5 +1.5 dB
VCO
2 RZ1 = RZ2, GC1 = L, GC2 = H 32 35 dB
VCO
2 RZ1 = RZ2, GC1 = L, GC2 = H –1.9 +1.9 dB
VCO
= 0.4 A, sink + source 1.6 2.2 V
OUT
= 0.8 A, sink + source 2.0 3.0 V
OUT
I
=20mA 20 V
OUT
VC= 2.5 V, V
RZ1 = RZ2, GC1 = L, GC2 = L
Input dead zone voltage V
Input bias current 1 I
B SERVOVC
Input bias current 2 I
S/S pin high voltage V
S/S pin low voltage V
Gain control 1 high voltage V
Gain control 1 low voltage V
Gain control 2 high voltage V
Gain control 2 low voltage V
S/S pin input current I
Gain control 1, 2 current I
Rotation output saturation voltage V
Rotation output saturation sustaining
voltage
(sat) H.FGIO
V
(sus) H.FG
Hall bias voltage V
CTRL pin high voltage V
CTRL pin low voltage V
CTRL input current I
DZ
B n.s
S/S H
S/S L
GC1 H
GC1 L
GC2 H
GC2 L
S/S
GC
H
CTRL H
CTRL L
CTRL
V
(voltage between out and out) =
O
0.1 V
= 1.0 V 500 nA
VNS= 1.0 V 500 nA
Input is CMOS level 4 V
Note) S/S pin Vth = VCC2/2 1 V
Input is at CMOS level. 4 V
Note) GC1 pin Vth = 2.0 V 1 V
Input is at CMOS level. 4 V
Note) GC2 pin Vth = 2.0 V 1 V
Input voltage=5V 50 100 µA
Input voltage=5V 53 110 µA
= –5 mA 0.24 0.5 V
± IO= 5 mA, RH= 200 Ω 0.7 0.97 1.2 V
Common for CTRL1 and CTRL2
input CMOS level
Note) CTRL pin Vth = 2.5 V 1.0 V
Input voltage=5V 53 110 µA
TSD operation voltage TSD Design target 150 180 210 °C
TSD hysteresis ∆TSD Design target 15 °C
= open, RL= ∞,
Cref
= open 7.5 10.5 mA
Cref
= open, RL= ∞,
Cref
= 2.5 V 5.7 6.0 6.3 V
Cref
17 30 mA
0.9 3 mA
–5 +5 mV
15µA
1.3 2.2 V
40 43 46 dB
±13 ±38 ±55 mV
4V
7V
Note) Vth is a design target and not measured.
No.5225-2/8
Page 3
Mode Switching Truth Table
CTRL0 CTRL1 Mode
L L Control
L H Noncontrol
H L Acceleration
H H Deceleration
L = 0 to 1.0 V
H = 4.0 V or more
Hall Logic Truth Table
LB1896
Source → Sink
1
2
3
4
5
6
W → V
V → W
W → U
U → W
V → W
W → V
U → V
V → U
V → U
U → V
U → W
W → U
U
IN
HHL
HLL
LLH
LHL
HLH
LHH
Hall input
V
IN
W
IN
An input is considered to be HIGH when UIN1 > UIN2, VIN1 > VIN2, and WIN1 > WIN2 by 0.2 V or more.
Forward when V
Reverse when VC< V
> V
C
Cref
Cref
Pin Assignment
F/R Control
Forward
Reverse
Forward
Reverse
Forward
Reverse
Forward
Reverse
Forward
Reverse
Forward
Reverse
No.5225-3/8
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Pin Functions
LB1896
Pin No.
3, 4
20, 21
Pin Name Pin Voltage Equivalent Circuit Diagram Pin Function
Frame
GND
Frame GND.
GND must be shared.
2 GND GND
23
U
V
22
W
19
17 Rf
OUT
OUT
OUT
Output pins.
Motor connection
Output Tr GND.
A resistor can be connected between this pin
and GND to sense the output current as a
voltage drop to provide for overcurrent
protection.
18, 24 NC Idle pins.
16 V
2 4.3 to 6.5 V v Power supply for blocks other than the
CC
output block.
v This supply should be kept stable to
prevent ripple and noise from entering this
pin.
1514Z1
Z2
v First-stage amplifier gain setting resistors.
v Z1 and Z2 normally range from several
tens of kΩ to several hundreds of kΩ.
v The gain is about 6 dB.
1312V
C
V
Cref
1110GC1
GC2
VCC2/2
±1.0
0toV
v VCis the speed control pin.
Forward when V
Reverse when V
V
is used to control the output voltage.
C
v V
determines the motor control stop
Cref
voltage.
V
2/2 in normal use.
CC
2 v Input/output gain switching pins.
CC
v GC1 is for first-stage amplifier Z1/Z2
> V
C
Cref
< V
C
Cref
switching.
When GC1 is LOW, Z1 is selected;
when HIGH, Z2 is selected. GC2 is for
next-stage amplifier switching.
Continued on next page.
.
.
No.5225-4/8
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Continued from preceding page.
LB1896
Pin No.
Pin Name Pin Voltage Equivalent Circuit Diagram Pin Function
9
CTRLφ
8
CTRL1
7 NS+ 0 to
6 S/S 0toV
0toV
V
2−1V
CC
2 v Operation mode switching pins.
CC
v Refer to the Mode Switching Truth Table
for selection of control, acceleration, or
deceleration.
v Input pin at noncontrol mode.
v The input-output gain is 14 dB.
(GC2: LOW)
v Motor stops when V
2 v When the S/S pin is HIGH, START;
CC
when LOW, STOP.
v The threshold is V
CC
NS
=0V.
2/2.
5FC
1
W
2
IN
W
34
33
32
31
30
1
IN
V
2
IN
V
1
IN
U
2
IN
U
1
IN
1.3 to 2.2 V
vConnect a capacitor between this pin and
GND to reduce the input/output gain
frequency response and to stop the
oscillator.
W-phase Hall device input pins.
Logic ‘‘H’’ represent W
V-phase Hall device input pins.
Logic ‘‘H’’ represent V
U-phase Hall device input pins.
Logic ‘‘H’’ represent U
1 > WIN2
IN
1 > VIN2
IN
1 > UIN2
IN
Continued on next page.
No.5225-5/8
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Continued from preceding page.
LB1896
Pin No.
2928VH+
27 H.FG 0 to V
26 CL 0 to V
Pin Name Pin Voltage Equivalent Circuit Diagram Pin Function
VH–
2.4 V
1.4 V
v Hall device power supply pins.
A voltage difference of 1.0 V is developed
between VH+ and VH–.
2 v Hall FG pin.
CC
2 v When the Rf pin voltage becomes equal to
CC
v The Hall waveform is converted into a
pulse signal and then used as the FG
pulse signal.
the C
pin voltage, the current limiter
L
operate. The C
externally.
voltage is determined
L
25 V
1 5 to 18 V v Power supply for output block.
CC
v This supply should be kept stable to
prevent ripple and noise from entering this
pin.
No.5225-6/8
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Block Diagram
Start/Stop
LB1896
detection
Absolute value
Gain
switching
Sample Application Circuit
Mode
switching
Hall amplifier
&
Matrix
&
F/R switching
Hall bias
No.5225-7/8
Page 8
LB1896
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors
and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:
2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume
production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use
or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of January, 1996. Specifications and information herein are subject to change without notice.
No.5225-8/8
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