31109 MS 20080221-S00008 / 83100RM(KI ) No.6204-1/5
http://onsemi.com
Semiconductor Components Industries, LLC, 2013
May, 2013
LB1867M
Overview
The LB1867M is a 2-pha se u ni p ol ar br ushless motor dri ve r . Wit h only a few peripheral parts, loc ku p p rotect i o n a nd
automatic recovery can be implemented. The IC can be configured for 12V or 24V operation and a wide range of
variations, fr om Low spe ed t o H -High s pee d and f rom 60c m to 120cm sq uare usi ng the sam e PCB. This m akes it easy
to design highly reliable fan motor installations.
Features
• Output protection Zener diode with variable withstand voltage
Z1, Z2 pins open: VOLM = 57V (24V specification)
Z1, Z2 pins shorted: VOLM = 32V (12V specification)
External Zener diode connected across Z1 − VCC 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 out p ut t r a n si s t o r wi t h 1 . 0A o u t p ut c u r re n t ( s t re n g t h en e d n e ga t i v e - c ur r e n t support for core without auxiliary
electrode)
• Built-in rotation detection function: Low during rotation and High during stop
• Built-in lockup protection with au tomatic recovery
• Built-in thermal shutdown
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum input current ICC max t ≤ 20ms 200 mA
Maximum applied output voltage VOUT max Internal V
Maximum output current IOUT max 1.0 A
Maximum current flowing into RD pin IRD max 10 mA
Maximum RD applied voltage VRD max 30 V
Allowable power dissipation Pd max Mounted on a specified board * 800 mW
Operating temperature Topr -30 to +80 °C
Storage temperature Tstg -55 to +150 °C
* Specified board: 20mm × 15mm × 1.5mm, glass epoxy board.
Monolithic Digital IC
2-phase Brushless
Fan Motor Driver
Orderin
g
numbe
r
: EN6204A
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
C onditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
LB1867M
No.6204-2/5
Allowable Operating Ranges at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Input current range ICC 6.0 to 50 mA
Common mode input voltage range VICM 0.2 to VIN-1.5 V
Electrical Characteristics at Ta = 25°C, ICC = 10mA
Ratings
Parameter Symbol Conditions min typ max
Unit
VOLM1 Z1, Z2 open 54 57 60 V Output limiter withstand voltage
VOLM2 Z1, Z2 short 31 33 35 V
VOsat1 IO = 0.5A 0.95 1.2 V Output saturation voltage
VOsat2 IO = 1.0A 1.15 1.5 V
VIN voltage VIN I
CC = 7.0mA 6.4 6.7 7.0 V
Hall input sensitivity (at zero peak) VHN Including offset and hysteresis 20 mV
RD output saturation voltage VRDsat IRD = 5mA 0.1 0.3 V
CT drain current IC1 C = GND 2.7 3.8 4.9 μA
CT discharge current IC2 C = VIN 0.19 0.30 0.41 μA
VTH1 0.77 0.8VIN 0.83 V Comp input threshold voltage
VTH2 0.42 0.45VIN 0.48 V
Thermal protection operating
temperature TSD Design target value * 180 °C
Thermal protection circuit
hysteresis
ΔTSD Design target value * 40 °C
* Design target value, Do not measurement.
Package Dimensions
unit : mm (typ)
3111A
SANYO : MFP14S(225mil)
1
14
7
8
8.0
0.15
(1.0) 1.0 0.35
1.7MAX
(1.5)
0.1 4.4
0.63
6.4
-30 0 20 40 60 80 100
0
1.0
0.8
0.6
0.4
0.2
Pd max -- Ta
-20
Ambient temperature, Ta -- °C
Allowable power dissipation, Pd max -- W
Specified board: 20×15×1.5mm3
glass epoxy board.
LB1867M
No.6204-3/5
Pin Assignment
1IN−
2IN+
3CT
4NC
5OUT1
6NC
7GND
14
13
12
11
10
9
VIN
RD
Z2
Z1
OUT2
NC
8NC
Top view
LB1867M
Pin Function
Pin No. Pin name Function
1 IN− Hall input + pin. Hysteresis amplifier
2 IN+ Hall input − pin. Hysteresis amplifier
3 CT Lockup protection time setting capacitor pin (0.47 to 4.7μF).
5 OUT1 Output 1 pin.
10 OUT2 Output 2 pin.
7 GND GND pin.
11 Z1 External Zener diode pin (external Zener diode to be connected between power supply and Z1).
12 Z2 Kickback absorption voltage alteration pin (shorted to Z1: 12V operation).
13 RD Lockup detection pin (latch type).
14 VIN Regulated power supply input pin (limiting resistor to be inserted between power supply and VIN).
Truth Table
IN+ IN− CT OUT1 OUT2 RD
H L L H L L
L H L L H L
H L H H H H
L H H H H H
* RD is a latch type output
LB1867M
No.6204-4/5
Block Diagram
IN−
IN+
CT
OUT1
GND
VIN
RD
Z2
Z1
OUT2
L1 L2
H
VCC
R1
R2
0.47 to 10μF
C1
Thermal
shutdown
Control block
Constant
current
source
Application Circuit Example
(1) 12V supply voltage
1
IN−
2
IN+3
CT 4
NC 5
OUT1 6
NC 7
GND
14 13 12 11 10 9
VIN RD Z2 Z1 OUT2 NC 8
NC
LB1867M
H
330Ω
2kΩ
VCC
12V
0.47μF
LB1867M
PS No.6204-5/5
(2) 24V supply voltage
1
IN−
2
IN+3
CT 4
NC 5
OUT1 6
NC 7
GND
14 13 12 11 10 9
VIN RD Z2 Z1 OUT2 NC 8
NC
LB1867M
H
1.2kΩ
2kΩ
VCC
24V
0.47μF
(3) High-Power Fan (120mm-HH-Speed)
H
330Ω
(1.2kΩ)
2kΩ
VCC
12V
(24V)
0.47μF
VZ=12V
(24V)
1
IN−
2
IN+3
CT 4
NC 5
OUT1 6
NC 7
GND
14 13 12 11 10 9
VIN RD Z2 Z1 OUT2 NC 8
NC
LB1867M
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