LB1998
No. 5979-1/9
LB1998
Three-Phase Brushless Motor Driver
for CD-ROM Spindle Drive
Monolithic Digital IC
The LB1998 is a three-phase brushless motor driver
especially suited for CD-ROM spindle motor drives.
Functions
Package Dimensions
unit: mm
3234-HSOP28HC
[LB1998]
Overview
SANYO : HSOP28HC
Ordering number : EN5979A
Current linear drive
Control V type amplifier
Top side current detection technique reduces loss
voltage of current detection resistor. Voltage effect of
this resistor reduces internal current drain of IC.
Built-in current limiter circuit
Built-in reverse blocking circuit
Hall FG output
Built-in 1 Hall FG/3 Hall FG switching circuit
Built-in short braking circuit
Built-in Hall bias cicuit
Built-in thermal shutdown circuit
Built-in S/S function
Built-in 3 mode gain switching function ensures
compatibility with 8/12 cm CAV and CLV discs
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
60499RM(KI)/30299RM(KI)
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
6.2
28
15
1
0.8
15.3
2.7
0.3
4.9
1.3
10.5
0.65
0.25
0.85
7.9
2.25
2.5max
0.1
0
25
25
50
75
100
0.4
0.8
1.2
1.6
1.8
2.0
0
Ambient temperature, Ta
C
Allowable power dissipation, Pd max W
Pd max Ta
IC only
0.79
0.474
1.08
With substrate (114.3 mm
76.1 mm
1.6 mm
3
)
LB1998
No. 5979-2/9
Maximum Ratings
at Ta = 25
C
Specifications
Operating Conditions
at Ta = 25
C
Sample Application
at Ta = 25
C
Parameter
Symbol
Conditions
Ratings
Unit
Power supply voltage
4 to 6
V
4 to 13.6
V
Parameter
Symbol
Conditions
Ratings
Unit
12V type
Regulated voltage
4 to 6
V
Unregulated voltage
4 to 13.6
V
V
CC
1 max
V
CC
2 max
V
CC
3 max
V
O
max
V
IN
max
I
O
max
V
CC
1
V
CC
1
V
CC
2
V
CC
1
V
CC
1
V
CC
2
Parameter
Symbol
Conditions
Ratings
Unit
Power supply voltage
7.0
V
14.4
V
14.4
V
Applied output voltage
14.4
V
Applied intput voltage
V
Output current
1.3
A
Allowable power dissipation
Pd max
IC only
0.79
W
1.80
W
Operating temperature
Topr
20 to +75
C
Storage temperature
Tstg
55 to +150
C
with substrate (114.3
76.1
1.6 mm
3
,
glass exposy)
LB1998
No. 5979-3/9
Electrical Characteristics
at Ta = 25
C, V
CC
1
= 5V, V
CC
2
= 12V
Note:
During S/S OFF (standby), the Hall comparator is at High.
Gain switching amplifier operated at a factor of 1.
Design target values are not measured.
I
CC
1
I
CC
2
I
CC
1OQ
I
CC
2OQ
V
CIN
= V
CREF
V
CIN
= V
CREF
V
S/S
= 0V
V
S/S
= 0V
V
OU
1
V
OD
1
V
CL
I
O
= 0.5A, V
CC
1 = 5V, V
CC
2 = 12V
I
O
= 0.5A, V
CC
1 = 5V, V
CC
2 = 12V
R
RF
= 0.25
V
HCOM
I
HIB
V
HIN
V
CC
11.0
mV
P-P
V
S/SH
V
S/SL
I
S/SI
I
S/SL
V
S/S
= 5V
V
S/S
= 0V
V
CIN
pin input current
V
CREF
pin input current
I
VC
I
VCREF
GV
CO
V
CTH
V
CTH
V
CIN
= V
CREF
= 1.65V
V
CIN
= V
CREF
= 1.65V
V
RF
/
V
C
, Note 1
V
CREF
= 1.65V, Note 1
V
CREF
= 1.65V, Note 1
V
GCOFFSET
G
VGC
V
GCOM
R
INL
FG
SEL
pin at Low level
R
INH
FG
SEL
pin at High level
I
H
V
H
T
TSD
T
TSD
V
BRH
V
BRL
V
FSH
V
FSL
V
CC
1
V
CC
0.5
V
CC
1
I
H
= 5 mA
min
typ
max
[Power supply current]
Power supply current
8 mA
250 300
mA
Output idle current
200
A
60
A
[Output]
Saturation voltage, upper side 1
V
Saturation voltage, lower side 1
0.3 V
Current limiter setting voltage
0.25 V
[Hall amplifier]
Common mode input voltage range
1.2 V
Input bias current
1
A
Minimum Hall input level
60
[S/S pin]
High level voltage
2.0
V
Low level voltage
0.7 V
Input current
200
A
Leak current
30
A
[Control]
1
A
1
A
Voltage gain
0.25
times
Startup voltage
1.55 1.85
V
Startup voltage width
100 200
mV
[Gain switching amplifier]
Input offset voltage
Design target value
8
+8
mV
OPEN LOOP voltage gain
f = 10 kHz, Design target value
43
dB
Same-phase input voltage range
0 3.5
V
[Hall power supply]
Hall power supply voltage
0.8 V
Allowable current
20 mA
[Thermal shutdown]
Operating temperature
Design target value
150 180 210
C
Hysterisis
Design target value
15
C
[Short braking]
Brake pin at High level
4 5
V
Brake pin at Low level
0 1
V
[1 Hall FG/3 Hall FG switching]
4 5
0 1
[Gain switching analog switch]
Analog switch at High level
Analog switch at Low level
0
0.2
Ratings
Parameter
Symbol
Conditions
Unit
1.0
LB1998
No. 5979-4/9
Truth Table
Pin Assignment
Brake Mode Switching Truth Table
Input:
H: Input 1 is higher in potential than input 2 by at least 0.2V.
L: Input 1 is lower in potential than input 2 by at least 0.2V.
BRAKE pin
L, OPEN
Foward
Reverse brake
H
Foward
Short brake
V
CIN
V
CIN
> V
CREF
V
CIN
< V
CREF
1
VCIN
28 ROUT3
2
RIN1
27 ROUT2
3
RIN2
26 ROUT1
4
RIN3
25 FGSEL
5
SIG GND
24 FC
6
S/S
PWR GND
23 VCREF
7
BRAKE
22 WOUT
PWR GND
8
FG
21 VOUT
9
RS
20 UOUT
10
VH
19 VCC2
11
WIN1
18 RF
12
WIN2
17 VCC1
13
VIN1
16 UIN2
14
VIN2
15 UIN1
A11194
Top view
LB1998
Hall input
Control
U
V
W
Phase W > Phase V
H
Phase V > Phase W
L
Phase W > Phase U
H
Phase U > Phase W
L
Phase V > Phase W
H
Phase W > Phase V
L
Phase U > Phase V
H
Phase V > Phase U
L
Phase V > Phase U
H
Phase U > Phase V
L
Phase U > Phase W
H
Phase W > Phase U
L
1
2
3
4
5
6
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
Source > Sink
LB1998
No. 5979-5/9
Block Diagram
+
U
IN
1
V
CC
1
V
CC
2
RF
U
OUT
U
IN
2
+
V
IN
1
+
V
IN
2
+
W
IN
1
W
IN
2
V
H
FG
+
V
OUT
W
OUT
PWR GND
BRAKE
V
CREF
+
+
V
CIN
R
OUT
1
R
IN
1
+
+
RS
FC
S/S
FRAME GND
FG
SEL
Matrix
Waveform distributor
Hall power
supply
Forward/
reverse
Current limiter
Short brake/
reverse brake switching
Thermal shutdown
Reference voltage
Gain switching amplifier
1 Hall FG/
3 Hall FG
Rotation direction detector
A11193
R
OUT
2
R
IN
2
R
OUT
3
R
IN
3
LB1998
No. 5979-6/9
Sample Application Circuit
1 VCIN
28
ROUT3
2 RIN1
27
ROUT2
3 RIN2
26
ROUT1
4 RIN3
25
FGSEL
5 SIG GND
24
FC
6 S/S
PWR GND
23
VCREF
7 BRAKE
22
WOUT
PWR GND
8 FG
21
VOUT
9 RS
20
UOUT
10 VH
19
VCC2
11 WIN1
18
RF
12 WIN2
17
VCC1
13 VIN1
16
UIN2
14 VIN2
15
UIN1
A11195
Control voltage
Gain switching SW(0V or VCC1)
Gain switching SW(0V or VCC1)
Gain switching SW(0V or VCC1)
Brake mode switching
FG output
0.033
F
0.033
F
0.033
F
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
Reverse detection
S/S
Applying VCC1 to each pin
activates load between
ROUT-VCIN
Power supply voltage
5V
Motor power supply voltage
12V
Hall
element
Control reference voltage
1/3 Hall FG switching
0V or Open:1 Hall FG
VCC1 :3 Hall FG
LB1998
LB1998
No. 5979-7/9
Pin number
Pin name
Pin voltage
Equivalent circuit
Pin function
19
4V to 13.6V
17
4V to 6V
9
R S
8
F G
10
6
S/S
5
SIG GND
24
F C
15
16
13
14
11
12
Pin Descriptions
Continued on next page
Source side predrive voltage and
constant current control amplifier
voltage supply pin
Power supply pin for all circuits
except output transistors, source
predriver, and low current control
amplifier
Reverse detector pin
Forward rotation: High
Reverse rotation: Low
1 Hall or 3 Hall element waveform
Schmitt comparator combined
output
U phase Hall element input and
reverse detector U phase Schmitt
comparator input pin
Logic High indicates U
IN
1 > U
IN
2.
V phase Hall element input and
reverse detector V phase Schmitt
comparator input pin
Logic High indicates V
IN
1 > V
IN
2.
W phase Hall element input and
reverse detector W phase Schmitt
comparator input pin
Logic High indicates W
IN
1 > W
IN
2.
Hall element lower side bias voltage
supply pin
When this pin is at 0.7V or lower, or
when it is open, all circuits are
inactive. When driving motor, set
this pin to 2V or higher.
Control loop frequency compensa-
tor pin. Connecting a capacitor
between this pin and GND prevents
closed loop oscillation in current
limiting circuitry.
GND pin for all circuits except
output
V
CC
2
V
CC
1
U
IN
1
U
IN
2
V
IN
1
V
IN
2
V
H
W
IN
1
W
IN
2
0V to W
CC
1
1.2V to
V
CC
11V
8
9
VCC1
100
A
10 k
A11196
13
11
15
25
A
14
12
16
25
A
25
A
200
200
VCC1
A11197
10
VCC1
75
A
30 k
2 k
A11198
6
VCC1
50 k
A11199
75 k
24
VCC1
2 k
20 k
5 k
A11200
LB1998
No. 5979-8/9
Pin number
Pin name
Pin voltage
Equivalent circuit
Pin function
23
0V to 3.5V
1
0V to 3.5V
22
PWR GND
21
20
18
R F
25
7
BRAKE
Continued from preceding page
Control reference voltage supply
pin. Determines control start
voltage.
Speed control voltage supply pin
V type control technique
V
C
> V
CREF
: Forward
V
C
< V
CREF
: Slowdown
(Reverse-blocking circuit
prevents reverse rotation.)
W phase output
Output transistor GND
V phase output
U phase output
Upper side output PNP transistor
collector pin (common for all 3
phases). For current detection,
connect resistor between V
CC
3
pin and RF pin. Constant current
control and current limiter works
by detecting this voltage.
1 Hall FG/3 Hall FG output,
switching pin:
High
>
3 Hall FG
Low/Open
>
1 Hall FG
Brake mode switching pin
BRAKE:
High
>
Short brake
Low/Open
>
Reverse brake
Brake mode changes when
V
CIN
> V
CREF
.
Continued on next page
V
CREF
V
CIN
W
OUT
V
OUT
U
OUT
FG
SEL
VCC1
23
25
A
15
A
25
A
15
A
68 k
200
A11201
VCC1
23
6
A
6
A
6
A
200
6 pF
A11202
1
18
PWRGND
VCC2
3.9
3.9
20 21 22
A11203
25
VCC1
50 k
75 k
A11204
100
A
3
VCC1
50 k
75 k
A11205
LB1998
No. 5979-9/9
VCC1
3
2
4
27
26
28
10 k
A11206
Pin number
Pin name
Pin voltage
Equivalent circuit
Pin function
2
3
0 to
Low: 0V
High:
4
26
27
28
V
CC
1
This catalog provides information as of June, 1999. Specifications and information herein are subject to change
without notice.
PS
Continued from preceding page
Gain switching selector pin
When set to High (V
CC
1), resistor
connected between R
OUT
1 and V
CIN
is selected as negative feedback
resistor.
Gain switching selector pin
When set to High (V
CC
1), resistor
connected between R
OUT
2 and V
CIN
is selected as negative feedback
resistor.
Gain switching selector pin
When set to High (V
CC
1), resistor
connected between R
OUT
3 and V
CIN
is selected as negative feedback
resistor.
Negative feedback resistor
connector pins
Connect negative feedback resistors
between these pins and V
CIN
.
R
IN
1
R
IN
2
R
IN
3
R
OUT
1
R
OUT
2
R
OUT
3
V
CC
1
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co. , Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.
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.
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