Monolithic Digital IC
Ordering number : EN4455B
O3097HA (OT)/30395TH (OT) No. 4455-1/6
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Three-Phase Brushless Motor Driver IC
LB1881M
Overview
The LB1881M is a three-phase brushless motor driver IC
designed for use as a camcorder capstan or drum motor
driver, or as a digital audio tape player/recorder motor
driver.
Features
120 voltage linear system
Appropriate for portable applications, since the
LB1881M reduces system power requirements by using
motor voltage control for speed control.
Built-in torque ripple compensation circuit
Small external capacitances due to the adoption of a soft
switching technique (chip capacitor).
Built-in thermal shutdown circuit
Built-in FG amplifier
Package Dimensions
unit: mm
3073A-MFP30S
SANYO: MFP30S
[LB1881M]
Specifications
Absolute Maximum Ratings
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
V
CC
1 max
7
V
Supply voltage
V
CC
2 max
12
V
V
S
max
V
CC
2
V
Output applied voltage
V
O
max
V
S
+ 2
V
Input applied voltage
V
I
max
All input pins
V
CC
1
V
Output current
I
O
max
1.0
A
Allowable power dissipation
Pd max
1.0
W
Operating temperature
T
opr
20 to +75
C
Storage temperature
T
stg
55 to +150
C
Allowable Operating Ranges
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
V
CC
1
V
CC
1
V
CC
2
4.0 to 6.0
V
Supply voltage
V
CC
2
4 to 10
V
V
S
Up to V
CC
2
V
No. 4455-2/6
LB1881M
Electrical Characteristics
at Ta = 25C, V
CC
1 = 5 V, V
CC
2 = 7 V, V
S
= 3 V
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
I
CC
1
V
BR
= 5 V
3.0
5.0
mA
Supply current
I
CC
2
V
BR
= 5 V
6.5
10.0
mA
I
S
V
BR
= 5 V, R
L
=
5.0
mA
Output quiescent current
I
CCOQ
V
STBY
= 0 V
100
A
I
SOQ
V
STBY
= 0 V, R
L
=
150
A
Output saturation voltage
V
O(sat)
I
OUT
= 0.6 A, sink + source
1.7
V
Output TRS withstand voltage
V
O(sus)
I
OUT
= 20 mA
*
1
12
V
Output quiescent voltage
V
OQ
V
BR
= 5 V
1.45
1.55
1.65
V
Hall amplifier input offset voltage
V
HOFFSET
*
1
5
+5
mV
Hall amplifier common mode input
V
HCOM
1.4
2.8
V
voltage range
Hall I/O voltage gain
GV
HO
Rangle = 8.2 k
34.0
37.0
40.0
dB
Brake pin high level voltage
V
BRH
2.0
V
Brake pin low level voltage
V
BRL
0.8
V
Brake pin input current
I
BRIN
120
A
Brake pin leakage current
I
BRLEAK
30
A
FRC pin high level voltage
V
FRCH
2.8
V
FRC pin low level voltage
V
FRCL
1.2
V
FRC pin input current
I
FRCIN
100
A
FRC pin leakage current
I
FRCLEAK
30
A
Upper side residual voltage
V
XH
I
OUT
= 100 mA, V
CC
2 = 6 V, V
S
= 2 V
0.285
0.455
V
Lower side residual voltage
V
XL
I
OUT
= 100 mA, V
CC
2 = 6 V, V
S
= 2 V
0.350
0.440
V
Residual voltage inflection point
V
S
VX
I
OUT
= 100 mA, V
CC
2 = 6 V
*
1
0.9
V
Overlap level
OL
V
CC
2 = 6 V, V
S
= 3 V, R
L
= 100
(Y)
60
70
80
%
Overlap vertical difference
OL
V
CC
2 = 6 V, V
S
= 3 V, R
L
= 100
(Y)
10
0
+10
%
Standby on voltage
V
STBYL
*
2
0.2
+0.8
V
Standby off voltage
V
STBYH
2
5
V
Standby pin bias current
I
STBYIN
100
A
Thermal protection circuit operating
T
TSD
*
1
150
180
210
C
temperature
Thermal protection circuit hysteresis
T
TSD
*
1
15
C
FG amplifier input offset voltage
V
FG OFFSET
8
+8
mV
Open loop voltage gain
GV
FG
f = 10 kHz
43
dB
Source output saturation voltage
V
FG OU
I
O
= 2 mA
3.7
V
Sink output saturation voltage
V
FG OD
I
O
= 2 mA
1.3
V
Common mode signal exclusion ratio
G
HR
*
1
80
dB
FG amplifier common mode input
V
FG CH
0
3.5
V
voltage range
Phase margin
M
*
1
20
deg
Schmitt amplifier threshold voltage
V
FGS SH
V
FGIN
+
= 2.5 V,
2.45
2.50
2.55
V
when V
FGOUT
2 goes from high to low
Schmitt amplifier hysteresis width
V
FGS HIS
V
FGIN
+
= 2.5 V
20
40
60
mV
Note: 1. These are target settings, and are not measured. The overlap ratings are taken as test ratings without change.
2. When the standby pin is open the IC will be in the standby state.
No. 4455-3/6
LB1881M
Pin Assignment
Block Diagram
Top view
Allowable power dissipation, Pd max W
No. 4455-4/6
LB1881M
Pin Functions
Pin No.
Symbol
Pin voltage
Equivalent circuit
Pin function
4
V
S
V
CC
2
Power supply input that determines the output
amplitude. It must be set to a voltage equal or
lower than V
CC
2.
5
V
CC
2
4 to 10 V
Power supply for power amplifier systems other
than motor drive transistors. Power supply pin
that provides voltage for blocks other than control
blocks supplied by V
CC
1.
6
V
CC
1
4 to 6 V
Power supply that provides voltage for the Hall
amplifier, the forward/reverse circuit, the FG
amplifier, and the thermal shutdown circuit.
8
ANGLE
Connect a resistor between this pin and GND.
Changing the value of this resistor will change the
Hall input-output gain (motor waveform slope).
10
FG
IN
0 V min
FG signal input pin
11
FG
IN
+
3.5 V max
(When V
CC
1 is 5 V)
12
FG
OUT
1
FG amplifier output pin
7
ST. BY
(H): 2.0 V max
All circuits can be made inoperative either by
(L): 0.8 V min
connecting this pin to GND, or by leaving it open.
(When V
CC
1 is 5 V)
In that state the supply current will be
approximately 0 A. Hold at 2 V or higher during
normal operation.
Continued on next page
Unit (resistance:
)
Continued from preceding page.
Pin No.
Symbol
Pin voltage
Equivalent circuit
Pin function
No. 4455-5/6
LB1881M
19
BR
(H): 2.0 V min
Motor brake pin
(L): 0.8 V max
Low level: Motor drive
(under 0.8 V)
High level: Motor brake
(over 2.0 V)
20
W
IN
2
1.4 V min
W phase Hall element input pins.
21
W
IN
1
2.8 V max
Logic high is defined to be states where
22
V
IN
2
(When V
CC
1 is 5 V)
W
IN
1 > W
IN
2.
23
V
IN
1
V phase Hall element input pins.
24
U
IN
2
Logic high is defined to be states where
25
U
IN
1
V
IN
1 > V
IN
2.
U phase Hall element input pins.
Logic high is defined to be states where
U
IN
1 > U
IN
2.
13
FG
OUT
2
FG Schmitt amplifier output pin
27
U
OUT
Output pin
28
V
OUT
3
W
OUT
26
R
f
Output transistor GND
1, 2,
FRAME
GND for all circuits other than output transistors.
14, 15,
(GND)
16, 17,
29, 30
18
FRC
(H): 2.8 V min
Pin for setting the motor to forward or reverse
(L): 1.2 V max
rotation
(When V
CC
1 is 5 V)
Low level: Forward rotation
(under 1.2 V: when V
CC
1 is 5 V)
High level: Reverse rotation
(over 2.8 V: when V
CC
1 is 5 V)
Unit (resistance:
)
Sample Application Circuit
Logic Value Table
Inputs:
High: For each phase, the input 1 potential is at least 0.2 V higher than the input 2 potential.
Low: For each phase, the input 1 potential is at least 0.2 V lower than the input 2 potential.
Forward/reverse control:
High: 2.8 V to V
CC
1
Low: 0 to 1.2 V
No. 4455-6/6
LB1881M
This catalog provides information as of November, 1997. Specifications and information herein are subject to
change without notice.
s
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.
s
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
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:
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.
s
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.
Source
Input
Forward and reverse control
Sink
U
V
W
F/RC
1
W phase
V phase
H
H
L
L
V phase
W phase
H
2
W phase
U phase
H
L
L
L
U phase
W phase
H
3
V phase
W phase
L
L
H
L
W phase
V phase
H
4
U phase
V phase
L
H
L
L
V phase
U phase
H
5
V phase
U phase
H
L
H
L
U phase
V phase
H
6
U phase
W phase
L
H
H
L
W phase
U phase
H
Units (resistance:
, capacitance: F)
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