The LA6581DM is a low-saturation BTL output linear
driving motor driver for single-phase bipolar fan motors.
It features quite, low power, high efficiency drive that
suppresses reactive current. It is optimal for use in
applications that require miniaturization and low noise,
such as CPU cooling fan motors and 5 to 12V electronic
game products.
Micro8
Functions
•
Single-phase full-wave linear drive with BTL output (gain resistance 500Ω to 284kΩ, 55dB) : Suitable for the
equipment requiring silent operation, such as game equipment, CPU cooler, etc. because of its freedom from
switching noise.
•
Low-voltage operation possible, with wide operable voltage range (2.2 to 16V)
•
Low saturation output (Upper + lower saturation voltage : VOsat (total) = 0.3V typ, IO = 100mA) : High coil
efficiency with low current drain. IC itself does not generate much heat.
•
High impedance of Hall input pin
•
FG output (rotation speed detection output : open collector output)
•
Heat protection circuit : When the large current flows because of output short-circuit, raising the IC chip temperature
above 180°C, the heat protection circuit suppresses the drive current, preventing IC burn and breakdown.
•
Extra-small package (Micro8)
Small substrate while allowing larger blades
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Output voltage
Allowable power dissipation
Output current
Symbol
VCC max
Pd max
IOUT1 max
IOUT2 max
Output withstand voltage
FG output withstand
FG output current
Operating temperature
Storage temperature
VOUT max
VFG max
IFG max
Topr
Tstg
Mounted on a specified board *1
*2
T<200ms
Conditions
Ratings
18
400
0.36
0.50
18
18
5
-30 to +100
-55 to +150
Unit
V
mW
A
A
V
V
mA
°C
°C
*1: Mounted on a board (20.0mm 10.0mm 0.8mm: Paper Phenol, wiring density 20%)
*2: This specifies the starting current. Tj=15°C max must not be exceeded..
Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,
high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
ORDERING INFORMATION
See detailed ordering and shipping information on page 5 of this data sheet.
Semiconductor Components Industries, LLC, 2014
January, 2014
10814NK 20131203-S00001 No.A2264-1/5
LA6581DM
Recommended Operating Conditions
at Ta = 25°C
Parameter
Supply voltage
Common-phase input voltage range of
Hall input
Symbol
VCC
VICM
Conditions
Ratings
2.2 to 16
0.3 to VCC-1.5
Unit
V
V
Electrical Characteristics
at Ta = 25°C, VCC = 12.0V, unless especially specified.
Ratings
Parameter
Circuit Current
OUT output low voltage
OUT output high voltage
Hall bias voltage
Hall amplifier gain
Hall amplifier input current
FG output low voltage
FG output leakage current
Thermal protection circuit
Symbol
ICC
VOL
VOH
VHB
Vg
VINR
VFG
IFGL
Th
IFG = 3mA
VFG = 7V
* Design guarantee
150
180
Conditions
min
IN- = 5.8V, IN+ = 6.0V, RL =
∞
IO = 100mA
IO = 100mA
RH = 360Ω +91Ω
1.85
52
-10
Typ
14
0.1
0.1
1.95
55
-2
0.2
Max
19
0.2
0.2
2.05
58
+10
0.3
30
200
mA
V
V
V
dB
μA
V
μA
°C
Unit
*: These values are design guarantee values, and are not tested.
Truth Table
IN-
H
L
-
IN+
L
H
-
OUT1
H
L
Off
OUT2
L
H
Off
FG
L
During rotation
Off
-
During overheat protection
mode
Pd-Ta
500
Pd max -- Ta
400
With specified board
300
200
160
100
0
90
120
No.A2264-2/5
LA6581DM
Package Dimensions
unit : mm (typ)
Micro8
CASE 846A-02
ISSUE J
Pin Assignment
Micro8
IN+ 1
HB 2
3
OUT1 4
Top view
8 FG
7 VCC
6 OUT2
5 GND
No.A2264-3/5
LA6581DM
Block Diagram
VCC
FG
2.0VRG
HB
H
IN-
IN+
OUT1
OUT2
GND
Timing Chart
Hall Signal
OUTPUT
Coil Current
FG Pulse
No.A2264-4/5
LA6581DM
Application Circuit Example
Di
*1
Cr
VCC
*4
R2
HB
FG
HB
*3
H
LA6581DM
*2
H
OUT1
IN+
*5
R2
GND
OUT2
R1
IN+
Elements in substrate
*1 : When Di to prevent breakdown in case of reverse connection is used, it is necessary to insert a capacitor Cr to
secure the regenerative current route. Similarly, Cr is necessary to enhance the reliability when there is no
capacitor near the fan power line.
*2 : To obtain Hall bias from VCC, carry out 1/2
×
VCC bias as shown in the figure. Linear driving is made through
voltage control of the coil by amplifying the Hall output. When the Hall element output is large, the startup
performance and efficiency are improved. Adjustment of the Hall element can reduce the noise further.
*3 : When the Hall bias is taken from the HB pin, constant-voltage bias is made with about 2.0V. Therefore, the Hall
element can provide the output satisfactory in temperature characteristics. Adjustment of the Hall output
amplitude is made with R1. (When VCC = 12V, the step *2 above proves advantageous for IC heat generation.)
*4 : Keep this open when not used.
*5 : When the wiring from the Hall output to IC Hall input is long, noise may be carried through the wiring.
In this case, insert the capacitor as shown in the figure.
ORDERING INFORMATION
Device
LA6581DMR2G
Package
Micro8
(Pb-Free / Halogen Free)
Shipping (Qty / Packing)
4000 / Tape & Reel
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application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental
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