LB1981V
No. 5917-1/9
Specifications
Absolute Maximum Ratings
at Ta = 25
C
Parameter
Symbol
Conditions
Ratings
Unit
Power supply voltage
V
CC
1 max
7
V
V
CC
2 max
12
V
V
S
max
V
CC
2
V
Applied output voltage
V
O
max
V
S
+2
V
Applied input voltage
V
IN
1 max
Control circuits
0.3 to V
CC
1+0.3
V
V
IN
2 max
U, V, W, COM
V
S
+2
V
Output current
I
O
max
1.0
A
Allowable power dissipation
Pd max
0.5
W
Operating temperature
Topr
20 to +75
C
Storage temperature
Tstg
55 to +150
C
Monolithic Digital IC
Overview
Features
LB1981V
Three-Phase Brushless Motor Driver
Package Dimensions
unit: mm
3191-SSOP30
Three-phase full-wave drive brushless sensorless motor
drive
Soft switching drive
Power-saving speed control function due to motor
voltage
Use with 3V power supply possible
Output residual voltage can be set in 4 ways
Forward/reverse switching possible
Built-in standby function (FG and PG amplifier only
remain operative)
Built-in braking circuit
Built-in thermal shutdown circuit
Built-in FG and PG amplifiers
Built-in saturation prevention amplifier and midpoint
control circuit
The LB1981V is a three-phase brushless motor driver
especially suited for use mainly with drum motors of
portable VCRs.
81299RM(KI)
Ordering number : ENN5917
[LB1981V]
1
15
16
7.6
0.65
9.95
0.5
5.6
0.1
1.6max
1.0
30
0.22
0.43
0.15
SANYO : SSOP30
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.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
LB1981V
No. 5917-2/9
Electrical Characteristics
at Ta = 25
C, V
CC
1 = 3V, V
CC
2 = 4.75V, V
S
= 3V
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Power supply current
I
CC
1
I
O
= 76 mA
5
7.5
mA
I
CC
2
I
O
= 76 mA
1.2
2.5
mA
Output idle current
I
CC
10Q
V
STBY
= 0V
1.0
1.5
mA
I
CC
20Q
V
STBY
= 0V
10
A
I
S30
Q
V
STBY
= 0V
60
120
A
Output saturation voltage, upper side 1
V
OU
1
I
O
= 0.1A
0.2
0.5
V
Output saturation voltage, lower side 1
V
OD
1
I
O
= 0.1A
0.2
0.5
V
Output saturation voltage, upper side 2
V
OU
2
I
O
= 0.4A
0.4
0.8
V
Output saturation voltage, lower side 2
V
OD
2
I
O
= 0.4A
0.4
0.8
V
COM pin common mode input voltage
V
IC
0.3
V
CC
20.9
V
range
Standby pin High level voltage
V
STBYH
2
V
CC
1
V
Standby pin Low level voltage
V
STBYL
0.2
+0.7
V
Standby pin input current
I
STBYH
V
STBY
= 3V
50
A
Standby pin leakage current
I
STBYL
V
STBY
= 0V
10
A
FRC pin High level voltage
V
FRCH
2
V
CC
1
V
FRC pin Low level voltage
V
FRCL
0.2
+0.7
V
FRC pin input current
I
FRCI
V
FRC
= 3V
50
A
FRC pin leakage current
I
FRCL
V
FRC
= 0V
10
A
Slope pin source current ratio
R
SOURCE
I
CSLP
1 source/I
CSLP
2 source
12
+12
%
Slope pin sink current ratio
R
SINK
I
CSLP
1 sink/I
CSLP
2 sink
12
+12
%
CSLP1 source - sink current ratio
R
CSLP
1
I
CSLP
1 source/I
CSLP
1 sink
35
+15
%
CSLP2 sink - source current ratio
R
CSLP
2
I
CSLP
2 source/I
CSLP
2 sink
35
+15
%
Startup frequency
Freq
C
OSC
= 0.1
F, OSC frequency *1
11.5
Hz
Phase delay width
Dwidth
*1
30
deg
Thermal shutdown operating
T
TSD
*1
150
180
210
C
temperature
Thermal shutdown hysteresis
T
TSD
*1
15
C
SELCSLP pin High level voltage
V
SEL
H
2
V
CC
V
SELCSLP pin Low level voltage
V
SEL
L
0.2
+0.7
V
SELCSLP input current
I
SEL
H
V
SELCSLP
= 3V
50
A
SELCSLP pin leakage current
I
SEL
L
V
SELCSLP
= 0V
10
A
[FG amplifier]
Input offset voltage
V
IO
*1
1
5
mV
Input bias current
I
BIN
250
nA
Common mode input voltage range
V
ICOM
*1
1
2
V
Open loop gain
G
VFG
f = 1 kHz *1
55
dB
Input ON voltage
V
OL
I
O
= 10
A
0.4
V
Input OFF voltage
V
OH
I
O
= 10
A
V
CC
10.5
V
Schmitt amplifier hysteresis width
V
SHIS
*1
20
mV
Output duty
Duty
f = 720 Hz, V
IN
= 20 mVp-p
30
70
%
Reference voltage
V
REF
1.15
1.30
1.45
V
[PG amplifier]
Input offset voltage
V
IO
*1
1
5
mV
Input bias voltage
I
BIN
*1
250
nA
Common mode input voltage range
V
ICOM
*1
1
2
V
Open loop gain
G
VPG
f = 1 kHz *1
55
dB
Output ON voltage
V
OL
I
O
= 10
A
0.4
V
Output OFF voltage
V
OH
I
O
= 10
A
V
CC
10.5
V
Schmitt amplifier hysteresis width
V
SHIS
*1
50
mV
Allowable Operating Ranges
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Power supply voltage
V
CC
1
2.7 to 6.0
V
V
CC
2
2.7 to 10.0
V
V
S
0 to V
CC
2
V
Note: Items shown to be "*1" are not measured.
LB1981V
No. 5917-3/9
Pin Assignment
1
UOUT
30 RF
2
VOUT
29 WOUT
3
STBY
28 COM
4
SELCSLP
27 VIN
5
FRC
26 UIN
6
VS
25 WIN
7
VCC2
24 GND
8
VCC1
23 BFGO
9
CSLP1
22 FC2
10
CSLP2
21 FILTER
11
PGOUT
20 FC1
12
PGC
19 OSC
13
PGIN
18 FGOUT
14
VREF
17 FGIN2
15
FGIN
16 FGIN1
LB1981V
Top view
A10857
Pd max - Ta
Allowable power dissipation, Pd max W
0.1
0.2
0.3
0.6
0.5
0.4
0
20
40
60
80
100
0
20
Ambient temperature, Ta C
LB1981V
No. 5917-4/9
Pin Descriptions
Pin number
3
4
5
6
7
8
9
10
Pin name
STBY
SEL CSLP
FRC
V
S
V
CC
2
V
CC
1
CLSP1
CLSP2
Pin voltage
V
CC
1 max
0.2V min
V
CC
1 max
0.2V min
V
CC
1 max
0.2V min
0V to V
CC
2
2.7V to 10V
2.7V to 6V
Equivalent circuit
Pin function
When this pin is at 0.7V or
less or when it is open, only
the FG/PG amplifier operates.
In the motor drive state, the
pin should be at 2V or higher.
CSLP pin charge/discharge
current switching pin.
Setting this pin to 2V or higher
switches the triangular wave
slope that determines soft
switching.
Motor forward/reverse
switching pin.
Low: reverse
(0.2V to +0.7V or open)
High: forward
(2V to V
CC
1)
Power supply pin for
determining output amplitude
by supplying motor voltage.
Must be lower than V
CC
2
voltage.
Power supply pin for supplying
source side predriver voltage
and coil waveform detect
comparator voltage.
Power supply pin for circuits
except motor voltage, source
side predriver voltage, and coil
waveform detect comparator
voltage.
Pins for connecting triangular
wave oscillator capacitor. This
triangular wave coil output
performs waveform soft
switching.
Continued on next page
3
100k
100k
VCC1
A10858
4
100k
100k
VCC1
A10859
5
50k
50k
VCC1
A10860
20
A
9
10
4
A
20
A
8
A
1k
VCC1
A10861
LB1981V
No. 5917-5/9
Pin number
11
12
13
14
15
16
17
Pin name
PG
OUT
PGC
PGIN
V
REF
FG
IN
FG
IN
1
FG
IN
2
Pin voltage
2.0V max
1.0V min
(V
CC
= 3V)
2.0V max
1.0V min
(V
CC
1 = 3V)
Equivalent circuit
Pin function
PG amplifier output pin.
PG amplifier peak hold
capacitor connection pin.
PG amplifier input pin.
Connect PG coil between this
pin and V
REF
.
Internal 1.3V reference
voltage.
Used as reference voltage for
FG and PG amplifiers.
FG amplifier input pin.
Connect FG coil between this
pin and V
REF
.
FG amplifier input signal noise
filter capacitor connection pin.
FG amplifier input signal noise
filter capacitor pin.
Continued from preceding page
Continued on next page
11
VCC1
30
A
30k
A10862
12
200
VCC1
75k
1.5k
10
A
10
A
6
A
A10863
13
500
500
1.3V
100k
VCC1
A10864
6
A
14
1.3V
70k
35k
VCC1
A10865
17
VCC1
16
15
6
A
10k
1.3V
200
9k
1k
A10866
LB1981V
No. 5917-6/9
Pin number
18
19
20
22
21
Pin name
PG
OUT
Pin voltage
Equivalent circuit
Pin function
FG amplifier output pin.
Pin for connecting triangular
wave oscillator capacitor.
Serves for forced startup
waveform generation.
Frequency characteristics pin.
Connecting a capacitor
between this pin and ground
serves to prevent closed-loop
oscillation in the current
control circuitry.
(Lower-side output transistor
drive current)
Frequency characteristics pin.
Connecting a capacitor
between this pin and ground
serves to prevent closed-loop
oscillation in the current
control circuitry.
(Lower-side output transistor
drive current)
Connecting a capacitor
between this pin and ground
activates the coil output
saturation prevention function.
In this condition, the VS pin is
controlled for motor voltage
control.
By adjusting the external
capacitor, torque ripple
compensation can be varied.
Continued from preceding page
OSC
FC1
FC2
FILTER
Continued on next page
18
VCC1
30
A
30k
A10867
19
VCC1
5
A
2.5
A
10
A
1k
A10868
20
VCC1
2k
2k
5k
10k
2s
A10869
22
VCC1
10k
FC2
A10870
21
2
VCC1
1k
30k
1k
1
1k
29
1k
25
A
A10871
LB1981V
No. 5917-7/9
Pin function
Motor counterelectromotive
voltage FG pulse pin.
Outputs a pulse using W
phase counterelectromotive
voltage as FG.
Connect to ground if not used.
Ground for all circuits except
output.
Coil waveform detect
comparator input pins.
Motor coil midpoint input pin.
Using this voltage as a
reference, the coil voltage
waveform is detected.
W phase coil output pin.
U phase coil output pin.
V phase coil output pin.
Output transistor ground.
Constant current drive is
performed by detecting the
voltage at this pin.
Pin number
23
24
25
26
27
28
29
1
2
30
Pin name
BFG0
Pin voltage
Equivalent circuit
Continued from preceding page
GND
W
IN
U
IN
V
IN
COM
W
OUT
U
OUT
V
OUT
RF
23
VCC1
50
A
50
A
30k
A10872
28
26
27
25
10
A
2k
200
200
200
VCC2
A10873
30
29
1
2
3.9
3.9
VCC1
VS
A10874
LB1981V
No. 5917-8/9
Block Diagram (Constants for external components depend on motor.)
+
+
+
+
+
+
+
V
CC1
FC2
BFG
STBY
OSC
FRC
CSLP1
CSLP2
SELCSLP
FC1
FILTER
FG
OUT
FG
IN2
FG
IN1
FG
IN
V
REF
PG
IN
PGC
PG
OUT
GND
RF
W
OUT
V
OUT
U
OUT
V
S
W
IN
V
IN
U
IN
COM
V
CC2
0.1
F
0.1
F
0.1
F
30k
200
200
50k
10k
V
CC1
30k
200
200
9k
1k
500
100k
500
200
1.5k
75k
200
200
V
CC1
30k
V
CC1
Thermal shutdown circuit
Startup control
circuit
Timing control
circuit
Forward/reverse
Rotor position detect circuit
Soft switching
drive circuit
Midpoint control
Output drive circuit
A10875
Reference voltage
1M
1
F
0.25
30k
30k
30k
LB1981V
No. 5917-9/9
This catalog provides information as of August, 1999. Specifications and information herein are subject to change
without notice.
PS
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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