Ordering number : EN5657D
LB1862M
LB1962M
Overview
Monolithic Digital IC
For Fan Motor
Single-Phase Full-Wave Driver
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).
Functions
•
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
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Maximum output current
Maximum output withstand voltage
RD/FG maximum output withstand voltage
RD/FG maximum output current
HB maximum output current
ST maximum input voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
IOUT max
VOUT max
VR/F max
IR/F max
IB max
VST max
Pd max
Topr
Tstg
Mounted on a specified board *
Conditions
Ratings
17
0.5
17
17
5
10
15
850
-30 to +90
-55 to +150
Unit
V
A
V
V
mA
mA
V
mW
°C
°C
* Specified board: 114.3mm
×
76.2mm
×
1.5mm, glass epoxy board.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. 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.
80509 SY/21809 MS/O2599RM(KI) No.5657-1/7
LB1862M,LB1962M
Allowable Operating Conditions
at Ta = 25°C
Parameter
Power supply voltage
ST input High level voltage
ST input Low level voltage
Hall input common mode voltage
Symbol
VCC
STH
STL
VICM
Conditions
Ratings
3.8 to 16.8
3 to 14
-0.3 to +0.4
0.2 to VCC-1.5
Unit
V
V
V
V
Electrical Characteristics
at Ta
=
25°C, VCC = 5V
Parameter
Current drain
Symbol
ICC
Conditions
min
In drive mode (CT = “L”, ST = “L”)
In lockup protection mode (CT = “H”, ST = “L”)
In standby mode (ST = “H”)
Lockup detection
capacitor charge current
Capacitor discharge current
Capacitor charge/discharge
current ratio
CT charge voltage
CT discharge voltage
Output Low level voltage
Output High level voltage
Hall input sensitivity
RD/FG output pin Low voltage
RD/FG output pin leakage current
HB output Low voltage
ST pin input current
VCT1
VCT2
VOL
VOH
VHN
VRD(FG)
IRD(FG)
VHBL
IST
IO = 200mA
IO = 200mA
Zero peak value (Including offset and hysteresis)
IRD(FG) = 5mA
VRD(FG) = 15V
IHB = 5mA
VST = 5V
1.0
75
3.9
2.55
1.6
2.75
1.8
0.2
4.1
7
0.1
15
0.3
30
1.3
100
2.95
2.0
0.3
V
V
V
V
mV
V
μA
V
μA
ICT2
RCT
RCT = ICT1/ICT2
0.32
5.0
0.46
6.0
0.60
7.0
μA
ICT1
1.9
Ratings
typ
6.5
2.2
110
2.8
max
9.1
3.1
150
3.7
mA
mA
μA
μA
Unit
Package Dimensions
unit : mm (typ)
3086B
1
Pd max -- Ta
Specified board: 114.3×76.2×1.5mm
3
glass epoxy board.
0.63
5.0
10
6
Allowable power dissipation, Pd max -- mW
0.85
0.8
4.4
6.4
0.6
0.4
0.41
1.7max
1
5
0.15
0.2
0.1 (1.5)
0.35
1.0
(0.5)
0
-30 -20
0
Ambient temperature, Ta --
°C
20
40
60
80
90 100
SANYO : MFP10S(225mil)
PS No.5657-2/7
LB1862M,LB1962M
Pin Assignment
IN
−
1
IN+ 2
CT 3
OUT1 4
GND 5
Top view
10
RD
(FG)
9 HB
LB1862M
(LB1962M)
8 ST
7 VCC
6 OUT2
Block Diagram
CT
0.47 to 1μF
Charge / Discharge
circuit
RD
(LB1862M)
FG
Discharge
pulse
(LB1962M)
VCC
IN+
IN
−
Delay circuit
OUT2
Hysteresis amplifier
HB
Delay circuit
OUT1
Control
circuit
M
HALL
Thermal protection
circuit
START/STOP
ST
GND
Truth Table
ST
H
IN-
-
H
L
L
-
IN+
-
L
H
-
H
CT
-
L
OUT1
OFF
H
L
OFF
OUT2
OFF
L
H
OFF
OFF
RD
OFF
L
FG
OFF
L
H
-
L
Lockup protection activated
HB
OFF
L
Mode
Standby
Rotating
Latch-type RD output is Low during rotation and High during stop.
PS No.5657-3/7
LB1862M,LB1962M
Startup
Power-ON
VCC
OUT
CT
RD
FG
Lockup protection/automatic recovery
Locked
Output ON
Released
OUT
Output OFF
Output OFF
RD
FG
CT
Start/stop
ST
OUT
Output OFF
RD
FG
PS No.5657-4/7
LB1862M,LB1962M
Design Reference
(1) VCC 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 ±3.5mV (typ.).
The Hall input signal amplitude should be 70mV 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 mF 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.
PS No.5657-5/7
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