Ordering number : EN7192B
LA6581T
Monolithic Linear IC
Fan Motor Driver
http://onsemi.com
BTL Driver Single-Phase Full-Wave
Overview
The LA6581T 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.
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 (3 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.
•
Ultraminiature package (MSOP8: 3.0mm×4.9mm×0.93mm typ) : Small substrate while allowing larger blades.
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Parameter
Supply voltage
Output current
Output withstand voltage
FG output withstand
FG output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
IOUT max
VOUT max
VFG max
IFG max
Pd max
Topr
Tstg
Conditions
Ratings
18
0.30
18
18
5
400
-20 to +90
-55 to +150
Unit
V
A
V
V
mA
mW
°C
°C
* Specified board: 20.0mm
×
10.1mm
×
0.8mm, Paper phenol, wiring density 20%.
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.
Semiconductor Components Industries, LLC, 2013
May, 2013
30409 MS / 60607 MS IM B8-5218 / N2502AS (OT) No.7192-1/4
LA6581T
Recommended Operating Ratings
at Ta = 25°C
Parameter
Supply voltage
Common-phase input voltage range
of Hall input
Symbol
VCC
VICM
Conditions
Ratings
2.5 to 16
0.3 to VCC-1.5
Unit
V
V
Electrical Characteristics
at Ta
=
25°C, VCC = 12.0V, unless especially specified.
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
Ratings
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
* Design guarantee : Design target. Measurement with a single unit not made.
Package Dimensions
unit : mm (typ)
3245B
500
Pd max - Ta
Specified board
3.0
8
Allowable power dissipation, Pd max - mW
400
300
3.0
4.9
0.5
200
192
1
(0.53)
2
0.65
0.25
1.1MAX
(0.85)
100
0.125
0
--20
Mounted on a board:
20×10×0.8mm
3
, paper phenol
0
20
40
60
80
90
100
Ambient temperature, Ta -
°C
SANYO : MSOP8(150mil)
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
0.08
No.7192-2/4
LA6581T
Application Circuit Example
Di
*1
Cr
VCC
*4
R2
HB
FG
HB
*3
IN
−
LA6581T
*2
H
IN
−
IN+
*5
R2
GND
OUT1
H
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.
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of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at
www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no
warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the
application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental
damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual
performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical
experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use
as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in
which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for
any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors
harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or
death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the
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PS No.A0706-4/4
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