LB1862M, LB1962M
No. 5657-1/7
Overview
Single-phase full-wave drive design and a compact package
make these ICs optimal for small fans (especially CPU
cooling fans). Low switching noise and effective motor
drive are further advantages. The LB1862M features a
lockup detection output (RD) and the LB1962M features a
rotation detection output (FG).
Features
Support for 5V/12V dual power supply voltage
Built-in regenerative circuit allows use of reverse-
connection protection diode
Built-in Hall amplifier with hysteresis (supports core
without auxiliary electrode)
Built-in lockup protection and automatic recovery circuits
Latch-type lockup detection output (RD) is Low during
rotation and High during stop (LB1862M)
Rotation detection output (FG) (LB1962M)
Hall bias pin and start/stop pin allow reduced current drain
in standby mode
Built-in thermal protection circuit
LB1862M, 1962M
Package Dimensions
unit: mm
3086A-MFP10S
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.
O2599RM(KI)
Ordering number : ENN5657A
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Monolithic Digital IC
Fan Motor Single-Phase Full-Wave Drivers
[LB1862M/LB1962M]
SANYO : MFP10S
Specifications
Absolute Maximum Ratings
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
17
V
Maximum output current
I
OUT
max
0.5
A
Maximum output withstand voltage
V
OUT
max (LB1862M)
15
V
(LB1962M)
15
V
RD/FG maximum output
V
R
max
(LB1862M)
15
V
withstand voltage
V
F
max
(LB1962M)
17
V
RD/FG maximum output current
I
R
max
5
mA
I
F
max
5
mA
HB maximum output current
I
B
max
10
mA
ST maximum input voltage
V
ST
max
15
V
Allowable power dissipation
Pd max
With specified substrate*
850
mW
Operating temperature
Topr
(LB1862M)
20 to +75
C
(LB1962M)
30 to +85
C
Storage temperature
Tstg
55 to +150
C
*Specified substrate: 114.3
76.2
1.5 mm
3
glass epoxy
1
10
5
6
0.55
1.8
max
1.0
0.35
5.1
0.15
6.4
1.5
0.1
4.4
5.15
0.625
LB1862M, LB1962M
No. 5657-2/7
Truth Table
ST
IN
IN
+
CT
OUT1
OUT2
RD
FG
HB
Mode
H
off
off
off
off
off
Standby
H
L
L
H
L
L
L
L
Rotating
L
L
H
L
H
H
H
off
off
off
L
Lockup protection activated
Latch-type RD output is Low during rotation and High during stop.
Allowable Operating Ranges
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Power supply voltage
V
CC
3.8 to 16.8
V
ST input High level voltage
ST
H
3 to 14
V
ST input Low level voltage
ST
L
0.3 to +0.4
V
Hall input common mode voltage
V
ICM
0.2 to V
CC
1.5
V
range
Electrical Characteristics
at Ta = 25C, V
CC
= 5V
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Current drain
I
CC
In drive mode (CT = [L], ST = [L])
6.5
9.1
mA
In lockup protection mode (CT = [H], ST = [L])
2.2
3.1
mA
In standby mode (ST = [H])
110
150
A
Lockup detection
I
CT
1
1.9
2.8
3.7
A
capacitor charge current
Capacitor discharge current
I
CT
2
0.32
0.46
0.60
A
Capacitor charge/discharge current ratio
R
CT
R
CD
= I
CT
1/I
CT
2
5.0
6.0
7.0
CT charge voltage
V
CT
1
2.55
2.75
2.95
V
CT discharge voltage
V
CT
2
1.6
1.8
2.0
V
Output Low level voltage
V
OL
I
O
= 200 mA
0.2
0.3
V
Output High level voltage
V
OH
I
O
= 200 mA
3.9
4.1
V
Hall input sensitivity
V
HN
Zero peak value
7
15
mV
(Including offset and hysteresis)
RD/FG output pin Low voltage
V
RD,
V
FG
I
RD,
I
FG
= 5 mA
0.1
0.3
V
RD/FG output pin leakage current
I
RDL,
I
FGL
V
RD,
V
FG
= 15V
30
A
HB output Low voltage
V
HBL
I
HB
= 5 mA
1.0
1.3
V
ST pin input current
I
ST
V
ST
= 5V
75
100
A
Pin Assignment
IN
RD(FG)
HB
ST
VCC
OUT2
Top view
IN+
CT
OUT1
GND
A07357
1
2
3
4
5
10
9
8
7
6
LB1862M
LB1962M
LB1862M, LB1962M
No. 5657-3/7
Block Diagram
Sample Application Circuit
A07358
H
IN
IN+
HB
ST
CT
GND
VCC
OUT1
OUT2
C1 = 0.47 to 1
F
C2
RD
(FG)
CT
VCC
0.47 to 1
F
HALL
IN+
IN
HB
Discharge
pulse
Hysteresis amplifier
Thermal protection
circuit
Charge/discharge
circuit
Delay circuit
Delay circuit
Control
circuit
START/STOP
ST
GND
OUT1
OUT2
RD
(LB1862M)
(LB1962M)
FG
M
A07359
LB1862M, LB1962M
No. 5657-4/7
Startup
Lockup protection/automatic recovery
Start/stop
A07360
A07361
VCC
OUT
CT
RD
FG
OUT
RD
FG
CT
ST
OUT
RD
FG
Locked
Released
Output OFF
Output OFF
Output OFF
Output ON
Power-on
LB1862M, LB1962M
No. 5657-5/7
Design reference
(1) V
CC
pin
Power supply pin for control block and motor drive.
Accepts a wide operation voltage range from 3.8 to 16.8V, for 5V/12V dual power supply support.
(2) OUT1, OUT2 pins
Single-phase coil output pins.
Bipolar drive output with upper side inverted and lower side single output. Built-in regenerative circuit regenerates
kickback current between lower side NPN outputs when a diode is used for protection against reverse connection.
(3) IN
, IN
+
pins
Hall input signal pins
The Hall signal is amplified into a square wave by the Hall amplifier with hysteresis characteristics of
3.5 mV
(typ.). The Hall input signal amplitude should be 70 mV or more.
(4) CT pin
This pin serves for connecting a capacitor between CT and GND.
The capacitor determines the characteristics of the built-in lockup protection circuit for preventing coil burnout in
the case of motor restraint. Once normal motor load is restored, the automatic recovery circuit resets itself.
Changing the capacitance alters the lockup detection time.
When a 0.47
F capacitor is connected between CT and GND
Lockup detection time
: approx. 0.5s
Lockup protection time/automatic recovery time
: approx. 0.16s (output ON)
approx. 1s (output OFF)
When not using lockup protection function, this pin should be connected to ground.
(5) RD pin (LB1862M)
Open-collector output pin that is Low during rotation and OFF when lockup is detected.
The output is a latch type which stays OFF also when the automatic recovery circuit has restored drive mode unless
the rotation actually resumes.
(6) FG pin (LB1962M)
Open-collector output pin for rotation frequency detection.
When IN
= High and IN
+
= Low, then FG = Low
When IN
= Low and IN
+
= High, then FG = High
(7) ST pin and HB pin
ST pin : When input to this pin is High, motor drive is stopped (OUT is high impedance).
At this time, RD output indicates lockup protection mode OFF.
HB pin : Hall bias switching pin. At ST pin High input, Hall bias is switched to reduce current drain in fan standby
mode.
If not used, both pins should be open.
(8) Thermal protection circuit
When internal temperature Tj of IC reaches 180
C, output current limiter is activated to protect against damage.
LB1862M, LB1962M
No. 5657-6/7
1.0
0.8
0.6
0.4
0.2
0
0
2
4
8
6
14
12
10
Allowable power dissipation, Pd max mW
Ambient temperature, Ta
C
Pdmax Ta
Current drain, I
CC
mA
Power supply voltage, VCC V
ICC VCC
Output current, IO A
VO(sat)L IO
Input current, I
IN
A
Input voltage, VIN V
IIN VIN
Upper side output saturation voltage, V
O(sat)
H V
Output current, IO mA
VO(sat)H IO
VCC=5V
VCC=3.8V
Ta=25
C
VCC=3.8V
Ta=25
C
VCC=3.8V
Ta=25
C
IN
-
= L
IN
+
= L
CT = H
ST = H
HB
RD
510
Specified substrate (114.3
76.2
1.5 mm
3
glass epoxy)
V
RD
,V
HB
V
IRD, IHB mA
VRD,VHB - IRD,IHB
-20
0
80
60
40
20
1000
800
850
600
400
200
0
100
12
8
10
6
4
2
0
0
2
6
4
8
10
16
18
14
12
22
20
300
400
200
100
0
0.5
0.4
0.3
0.2
0.1
0
500
400
300
200
100
0
0
2
6
4
8
10
16
18
14
12
20
300
500
400
200
100
0
1.0
0.8
0.6
0.4
0.2
0
Lower side output saturation voltage, V
O(sat)
L V
LB1862M, LB1962M
No. 5657-7/7
This catalog provides information as of October, 1999. 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
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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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