LB1868M
No. 6203-1/5
LB1868M
Package Dimensions
unit: mm
3111-MFP14S
Overview
The LB1868M is a 2-phase unipolar brushless motor
driver. With only a few peripheral parts, lockup protection
and automatic recovery can be implemented. The IC can
be configured for 12V or 24V operation and a wide range
of variations, from LOW speed to H-High speed and from
60 cm to 120 cm square using the same PCB. This makes
it easy to design highly reliable fan motor installations.
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.
83100RM(KI)
Ordering number : ENN6203
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Monolithic Digital IC
Two-Phase Brushless Fan Motor Driver
[LB1868M]
SANYO : MFP14S
1
14
7
8
8.0
0.15
1.0 1.0
0.35
1.8max
1.5
0.1
4.4
6.4
5.15
0.625
Functions and Features
Output protection Zener diode with variable withstand
voltage
Z1, Z2 pins open: V
OLM
= 57V (24V specification)
Z1, Z2 pins shorted: V
OLM
= 32V (12V specification)
External Zener diode connected between Z1 and V
CC
pins: support for fans with large drive current
External resistor allows configuration for 12V or 24V.
Direct Hall element connection possible (built-in Hall
amplifier with hysteresis supports core without auxiliary
electrode)
Built-in output transistor with 1.0A output current
(strengthened negative-current support for core without
auxiliary electrode)
Built-in rotation detection function:
Low during rotation and High during stop
Built-in lockup protection with automatic recovery
ST pin for motor stop/drive (for standby mode of copiers
etc.)
FG output pin for rotation detection
BC pin for kickback noise reduction (with 2 external
capacitors)
Built-in thermal shutdown
LB1868M
No. 6203-2/5
Specifications
Absolute Maximum Ratings
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum input current
I
CC
max
t
20 ms
200
mA
Maximum applied output voltage
V
OUT
max
Internal
V
Maximum output current
I
OUT
max
1.0
A
Current flowing into RD, FG
IRD max
10
mA
RD, FG applied voltage
V
RD
max
30
V
ST applied voltage
V
ST
max
7.5
V
Allowable power dissipation
Pd max
*With specified substrate
800
mW
Operating temperature
Topr
30 to +80
C
Storage temperature
Tstg
55 to +150
C
*Printed circuit board: 20
15
1.5 mm
3
glass epoxy
Electrical Characteristics
at Ta = 25C, Icc = 10 mA
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Output limiter withstand voltage
V
OLM
1
Z1, Z2 open
54
57
60
V
V
OLM
2
Z1, Z2 short
31
33
35
V
Output saturation voltage
Vosat 1
Io = 0.5A
0.95
1.2
V
2
Io = 1.0A
0.15
1.5
V
VIN voltage
V
IN
I
CC
= 7.0 mA
6.4
6.7
7.0
V
Hall input sensitivity (at zero peak)
V
HN
Including offset and hysteresis
20
mV
RD, FG output saturation voltage
VRDsat
IRD = 5 mA
0.1
0.3
V
CT drain current
IC1
C = GND
2.7
3.8
4.9
A
CT discharge current
IC2
C = VIN
0.19
0.30
0.41
A
Comp input threshold voltage
VTH1
0.77
0.8V
IN
0.83
V
VTH2
0.42 0.45V
IN
0.48
V
ST input current
I
ST
V
ST
= 5V
80
120
A
Thermal protection circuit operating
temperature
TSD
Design target value*
180
C
Thermal protection circuit hysteresis
TSD
Design target value*
40
C
Allowable Operating Ranges
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Input voltage range
I
CC
6.0 to 50
mA
Common mode input voltage range
VICM
0.2 to V
IN
1.5
V
ST High voltage
VSTH
4.5 to 7.0
V
ST Low voltage
VSTL
0 to 0.5
V
100
80
60
40
20
0
20
30
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Pd max Ta
Ambient temperature, Ta
C
With 20
15
1.5 mm3 glass epoxy
Allowable power dissipation, Pd max W
* Design target values are not measured.
LB1868M
No. 6203-3/5
Truth Table
ST
IN+
IN
CT
OUT1
OUT2
RD
FG
H
H
L
L
H
H
L
L
L
H
L
H
H
L
H
L
H
L
L
H
L
L
L
or
L
H
L
L
H
L
H
OPEN
H
L
H
H
H
H
L
L
H
H
H
H
H
H
*RD is a latch type output.
Block Diagram and Sample Application Circuit
0.47 to 10
F
D
VIN
L2
L1
OUT1
OUT2
BC
Z1
Z2
FG
RD
GND
C1
CT
ST
IN
IN+
R2
H
R1
Control block
Thermal
shutdown
Constant
current
source
LB1868M
No. 6203-4/5
Pin Assignment
Pin Description
Pin name
Function
IN
Hall input + pin Hysteresis amplifier
IN+
Hall input pin Hysteresis amplifier
CT
Lockup protection time setting capacitor pin (0.47 to 4.7
F)
Z1
External Zener diode pin (external Zener diode to be connected between power supply and Z1)
Z2
Kickback absorption voltage alteration pin (shorted to Z1: 12V operation)
OUT1
Output 1 pin
OUT2
Output 2 pin
VIN
Regulated power supply input pin (limiting resistor to be inserted between power supply and VIN)
GND
GND pin
RD
Lockup detection pin (latch type)
FG
Rotation frequency detector pin
ST
Start/stop pin
BC
Output transistor common base pin
3
2
1
7
6
5
4
8
14
13
12
11
10
9
IN
IN+
CT
ST
BC
OUT1
GND
Top view
LB1868M
OUT2
NC
Z1
Z2
FG
RD
VIN
Sample Application Circuits
(1) 12V supply voltage
14
13
12
11
10
9
8
6
4
5
3
2
1
7
VIN
H
RD
FG
Z2
Z1
OUT2
IN
IN+
CT
ST
BC
OUT1
GND
LB1868M
0.47
F
2 k
Vcc
12V
330
LB1868M
No. 6203-5/5
(2) 24V supply voltage
(3) High-Power Fan (120 mm-HH-speed)
14
13
12
11
10
9
8
6
7
4
5
3
2
1
VIN
RD
FG
Z2
Z1
OUT2
IN
H
IN+
CT
ST
BC
OUT1
GND
0.47
F
2 k
Vcc
24V 1.2 k
14
13
12
11
10
9
8
6
4
5
3
2
1
H
7
VIN
RD
FG
Z2
Z1
OUT2
IN
IN+
CT
ST
BC
OUT1
GND
0.47
F
2 k
Vcc
12V
(24V)
330
(1.2 k
)
VZ = 12V
(24V)
LB1868M
LB1868M
This catalog provides information as of August, 2000. Specifications and information herein are subject to change
without notice.
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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