SANYO LB1862M_09

Ordering number : EN5657D
Monolithic Digital IC
LB1862M
LB1962M
For Fan Motor
Single-Phase Full-Wave Driver
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).
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
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max
17
V
Maximum output current
IOUT max
0.5
A
Maximum output withstand voltage
VOUT max
17
V
RD/FG maximum output withstand voltage
VR/F max
17
V
RD/FG maximum output current
IR/F max
5
mA
HB maximum output current
IB max
10
mA
ST maximum input voltage
VST max
15
V
850
mW
Allowable power dissipation
Pd max
Operating temperature
Topr
Mounted on a specified board *
-30 to +90
°C
Storage temperature
Tstg
-55 to +150
°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
Symbol
Conditions
Ratings
Unit
Power supply voltage
VCC
3.8 to 16.8
V
ST input High level voltage
STH
3 to 14
V
ST input Low level voltage
STL
-0.3 to +0.4
V
Hall input common mode voltage
VICM
0.2 to VCC-1.5
V
Electrical Characteristics at Ta = 25°C, VCC = 5V
Parameter
Symbol
Ratings
Conditions
min
Current drain
ICC
Lockup detection
typ
Unit
max
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
μA
1.9
2.8
3.7
μA
0.32
0.46
0.60
μA
5.0
6.0
7.0
ICT1
capacitor charge current
Capacitor discharge current
ICT2
Capacitor charge/discharge
RCT
RCT = ICT1/ICT2
current ratio
CT charge voltage
VCT1
2.55
2.75
2.95
V
CT discharge voltage
VCT2
1.6
1.8
2.0
V
Output Low level voltage
VOL
IO = 200mA
0.2
0.3
V
Output High level voltage
VOH
IO = 200mA
Hall input sensitivity
VHN
Zero peak value (Including offset and hysteresis)
7
15
mV
RD/FG output pin Low voltage
VRD(FG)
IRD(FG) = 5mA
0.1
0.3
V
RD/FG output pin leakage current
IRD(FG)
VRD(FG) = 15V
30
μA
HB output Low voltage
VHBL
IHB = 5mA
1.0
1.3
V
ST pin input current
IST
VST = 5V
75
100
μA
3.9
4.1
V
Package Dimensions
unit : mm (typ)
3086B
Pd max -- Ta
10
0.63
5.0
4.4
6.4
6
0.15
0.1 (1.5)
1.7max
5
1
0.35
1.0
Allowable power dissipation, Pd max -- mW
1
Specified board: 114.3×76.2×1.5mm3
glass epoxy board.
0.85
0.8
0.6
0.2
0
-30 -20
(0.5)
0.41
0.4
0
20
40
60
Ambient temperature, Ta -- °C
80
90 100
SANYO : MFP10S(225mil)
PS No.5657-2/7
LB1862M,LB1962M
Pin Assignment
RD
(FG)
IN− 1
10
IN+ 2
9 HB
CT 3
LB1862M
(LB1962M)
8 ST
OUT1 4
7 VCC
GND 5
6 OUT2
Top view
Block Diagram
CT
Charge / Discharge
circuit
0.47 to 1μF
RD
(LB1862M)
FG
(LB1962M)
Discharge
pulse
VCC
HALL
IN+
Delay circuit
IN−
OUT2
Hysteresis amplifier
Control
circuit
M
HB
Delay circuit
OUT1
Thermal protection
circuit
START/STOP
ST
GND
Truth Table
ST
IN-
IN+
CT
OUT1
OUT2
RD
FG
HB
Mode
H
-
-
-
OFF
OFF
OFF
OFF
OFF
Standby
L
Rotating
L
Lockup protection activated
L
H
L
L
H
-
-
L
H
H
L
L
H
OFF
OFF
L
L
H
OFF
-
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
Output ON
Locked
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
LB1862M,LB1962M
Application Circuit Example
7
C2
VCC
1 IN−
H
RD
10
(FG)
+
2 IN
9 HB
OUT1 4
LB1862M
LB1962M
OUT2 6
8 ST
3 CT
C1=0.47 to 1μF
GND
5
ICC -- VCC
12
VCC = 5V
10
400
IN− = L
8
Input current, IIN -- μA
Current drain, ICC -- mA
IIN -- VIN
500
IN+ = L
6
4
CT = H
300
200
100
2
ST = H
0
0
2
4
6
8
10
12
14
16
18
20
0
0
22
2
4
VO(sat)L -- IO
VCC = 3.8V
Ta = 25°C
0.4
0.3
0.2
0.1
0
0
100
200
Output current, IO -- A
300
400
Upper side output saturation voltage, VO(sat)H -- V
Lower side output saturation voltage, VO(sat)L -- V
0.5
6
8
10
12
14
16
18
20
Input voltage, VIN -- V
Power supply voltage, VCC -- V
VO(sat)H -- IO
1.0
VCC = 3.8V
Ta = 25°C
0.8
0.6
0.4
0.2
0
0
100
200
300
400
500
Output current, IO -- A
PS No.5657-6/7
LB1862M,LB1962M
VRD,VHB -- IRD,IHB
1.0
VCC = 3.8V
Ta = 25°C
HB
VRD, VHB -- V
0.8
0.6
0.4
0.2
RD
0
0
2
4
6
8
10
12
14
IRD, IHB -- mA
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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 Semiconductor Co.,Ltd.
products described or contained herein.
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This catalog provides information as of August, 2009. Specifications and information herein are subject
to change without notice.
PS No.5657-7/7