Ordering number : ENN7192
Monolithic Digital IC
LA6581T
BTL Driver Single-Phase Full-Wave Fan Motor Driver
Overview Package Dimensions
The LA6581T is a low-saturation BTL output linear unit: mm
driving motor driver for single-phase bipolar fan motors. It 3245A-MSOP8
features quite, low power, high efficiency drive that
suppresses reactive current. It is optimal for use in [LA6581T]
applications that require miniaturization and low noise, 3.0
such as CPU cooling fan motors and 5 to 12 V electronic 8 5
game products.
0.5
3.0
4.9
Functions and Features
• Single-phase full-wave linear drive with BTL output
(gain resistance 500-284k, 55dB): Suitable for the 1 4
0.65
(0.53) 0.125
equipment requiring silent operation, such as game 0.25
1.1max
equipment, CPU cooler, etc. because of its freedom from
(0.85)
switching noise
• Low-voltage operation possible, with wide operable
voltage range (3 to 16 V)
0.08
• Low saturation output (Upper + lower saturation SANYO: MSOP8
voltage: VOsat(total) = 0.3 Vtyp, IO = 100 mA): 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 (MSOP-8: 3.0 × 4.0 × 0.93 mm
typ): Small substrate while allowing larger blades.
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using 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 products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
N2502AS (OT) No. 7192-1/5
LA6581T
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Output voltage VCC max Mounted on a specified board* 18 V
Allowable dissipation Pd max VCC2 pin 400 mW
Output current IOUT Pins UL, VL, WL, UH, VH, WH 0.30 A
Output withstand voltage VOUT max 18 V
FG output withstand VFG max 18 V
FG output current IFG max 5 mA
Operating temperature Topr –20 to +90 °C
Storage temperature Tstg –55 to +150 °C
Note*: Mounted on a board (20.0 × 10.1 × 0.8 mm: Paper Phenol, wiring density 20%)
Recommended Operating Range at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Supply voltage VCC 2.5 to 16 V
Common-phase input voltage range of Hall input VICM 0.3 to VCC – 1.5 V
Electrical Characteristics at Ta = 25°C, VCC = 12.0 V, unless especially specified.
Ratings
Parameter Symbol Conditions Unit
min typ max
Circuit Current ICC IN– = 5.8 V, IN+ = 6.0 V, RL = ∞ 14 19 mA
OUT output low voltage VOL IO = 100 mA 0.1 0.2 V
OUT output high voltage VOH IO = 100 mA 0.1 0.2 V
Hall bias voltage VHB RH = 360 Ω + 91 Ω 1.85 1.95 2.05 V
Hall amplifier gain Vg 52 55 58 dB
Hall amplifier input current VINR –10 –2 10 µA
FG output low voltage VFG IFG = 3 mA 0.2 0.3 V
FG output leakage current IFGL VFG = 7 V 30 µA
Thermal protection circuit Th *Design guarantee 150 180 200 °C
Note*: Design guarantee: Design target. Measurement with a single unit not made.
Pd max — Ta
500
Allowable power dissipation, Pd max — mW
Specified board
400
300
200
192
100
Mounted on a board:
20 × 10 × 0.8mm3 paper phenol
0
--20 0 20 40 60 80 100
Ambient temperature, Ta — °C ILA00921
No. 7192-2/5
LA6581T
Truth Table
IN– IN+ OUT1 OUT2 FG Mode
H L H L L
During rotation
L H L H Off
— — Off Off — During overheat protection
Pin Assignment
IN+ FG
HB VCC
LA6581T
IN– OUT2
OUT1 GND
Top View
Block Diagram
VCC
FG
2.0VRG
IN+
OUT1 OUT2
H
IN–
GND
No. 7192-3/5
LA6581T
Timing Chart
Hall Signal
OUTPUT
Coil Current
FG Pulse
Sample Application Circuit
Di Cr *4
VCC
*1
R2 FG HB
HB *3
LA6581T H IN–
*2 H IN– OUT1
IN+
IN+ OUT2
*5 R1
R2 GND
Elements in
substrate
Notes 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 2.0 V. Therefore, the Hall element can provide the output
satisfactory in temperature characteristics. Adjustment of the Hall output amplitude is made with R1. (When VCC = 12 V, 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.
No. 7192-4/5
LA6581T
Specifications of any and all SANYO 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.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products must
not be exported without obtaining the export license from the authorities concerned in accordance with the
above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
This catalog provides information as of November, 2002. Specifications and information herein are
subject to change without notice.
PS No. 7192-5/5
