Sanyo LA6581M Fan motor driver btl driver single-phase full-wave Datasheet

Ordering number : EN8774B
LA6581M
Monolithic Linear IC
Fan Motor Driver
BTL Driver Single-Phase Full-Wave
Overview
The LA6581M 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.
• Small package (MFP8 : 5.0mm×6.4mm×1.6mm typ) : Small substrate while allowing larger blades.
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Supply voltage
VCC max
OUT output current
IOUT max
OUT output withstand voltage
FG output withstand
FG output current
Conditions
Ratings
Unit
18
V
0.50
A
VOUT max
18
V
VFG max
18
V
IFG max
5
mA
T<200ms
Continued on next page.
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
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customer who is considering such use and/or outside the scope of our intended standard applications, please
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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.
30409 MS / 32807 TI IM B8-8743 No.8774-1/4
LA6581M
Continued from preceding page.
Parameter
Symbol
Conditions
Ratings
Allowable power dissipation
Pd max
Mounted on a specified board *1
Operating temperature
Topr
*2
Storage temperature
Tstg
Unit
800
mW
-30 to +100
°C
-55 to +150
°C
*1: Specified board: 114.3mm × 76.1mm ×1.6mm, glass epoxy board
*2: Tj = 150°C max must not be exceeded.
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Supply voltage
VCC
Common-phase input voltage range of
VICM
Conditions
Ratings
Unit
2.2 to 16
V
0.3 to VCC-1.5
V
Hall input
Electrical Characteristics at Ta = 25°C, VCC = 12.0V, unless especially specified.
Parameter
Symbol
Ratings
Conditions
min
Unit
Typ
Max
Circuit Current
ICC
IN- = 5.8V, IN+ = 6.0V, RL = ∞
14
19
mA
OUT output low voltage
VOL
IO = 100mA
0.1
0.2
V
OUT output high voltage
VOH
IO = 100mA
0.1
0.2
V
Hall bias voltage
VHB
RH = 360Ω +91Ω
1.85
1.95
2.05
V
Hall amplifier gain
Vg
52
55
58
dB
Hall amplifier input current
VINR
-2
+10
µA
FG output low voltage
VFG
IFG = 3mA
0.2
0.3
V
FG output leakage current
IFGL
VFG = 7V
30
µA
Thermal protection circuit
Th
* Design guarantee
200
°C
-10
150
180
*: These values are design guarantee values, and are not tested.
Truth Table
IN-
IN+
OUT1
OUT2
FG
H
L
H
L
L
L
H
L
H
Off
-
-
Off
Off
-
mode
During rotation
During overheat protection
Package Dimensions
unit : mm (typ)
3032D
0.63
4
0.15
1.7max
0.35
(1.5)
1.27
Mounted on a specified board:
114.3mm×76.1mm×1.6mm,
glass epoxy
800
700
600
500
400
320
300
200
100
0
-30
0.1
1
(0.65)
Allowable power dissipation, Pd max - mW
5
4.4
6.4
8
Pd max - Ta
900
5.0
0
30
60
Ambient temperature, Ta - °C
90 100
120
ILA07055
SANYO : MFP8(225mil)
No.8774-2/4
LA6581M
Pin Assignment
IN+ 1
8 FG
7 VCC
HB 2
LA6581M
IN− 3
6 OUT2
OUT1 4
5 GND
Top view
Block Diagram
VCC
FG
2.0VRG
HB
IN+
H
OUT1
OUT2
IN-
GND
Timing Chart
Hall Signal
OUTPUT
Coil Current
FG Pulse
No.8774-3/4
LA6581M
Application Circuit Example
Di
Cr
*4
VCC
*1
R2
*3
LA6581M
*2
H
HB
FG
HB
IN−
OUT1
IN+
OUT2
IN−
H
IN+
*5
R2
GND
R1
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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products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
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products described or contained herein.
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This catalog provides information as of March, 2009. Specifications and information herein are subject
to change without notice.
No.8774-4/4
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