Ordering number : ENA0603
Monolithic Linear IC
LA6587T Fan Motor Driver
BTL Driver Single-Phase Full-Wave
Overview
The LA6587T is single-phase bipolar fan motor is driven, through BTL output linear drive, at high efficiency, low power,
and low sound by suppressing the reactive power. Lock protection, rotary signal (FG, 1/2FG) circuits are incorporated,
which is optimum for the notebook PC, consumer equipment power supply, car audio system, CPU cooler, etc. that require
high reliability and low noise.
Functions
• Single-phase full-wave linear drive by BTL output (gain resistance 1kΩ-360kΩ, 51dB)
: No switching noise, which is optimum for equipment requiring silence, such as consumer equipment power supply, car
audio system, etc.
• Low-voltage operation possible, with wide operating voltage range (2.2 to 14.0V)
• Low saturation output (Upper + lower saturation voltage : VOsat (total) = 1.1Vtyp, IO = 100mA)
: High coil efficiency with low current drain. Additionally, IC itself generates only small heat.
• Built-in lock protection and automatic reset circuits
• Built-in FG & 1/2FG outputs
• Built-in Hall bias (VHB = 1.5V)
• Thermal protection circuit
: When the large current flows due to output short-circuit and the IC chip temperature exceeds 180°C, this protective
circuit suppresses the drive current to prevent burn and damage to IC.
• Extra-small package (MSOP10)
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Output voltage VCC max 15 V
Allowable power dissipation Pd max Mounted on a specified board* 400 mW
Output current IOUT max 0.6 A
Output withstand voltage VOUT max 15 V
RD/FG output pin output VRD/FG max 15 V
withstand voltage
RD/FG output current IRD/FG max 10 mA
Continued on next page.
Any and all SANYO Semiconductor 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 Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor 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 Semiconductor
products described or contained herein.
D0606 MS PC B8-7868 No.A0603-1/5
LA6587T
Continued from preceding page.
Parameter Symbol Conditions Ratings Unit
HB output current IB max 10 mA
Operating temperature Topr -40 to +85 °C
Storage temperature Tstg -40 to +150 °C
* Mounted on a specified board : 114.3×76.2×1.5mm3, glass epoxy board.
Operating Conditions at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Supply voltage VCC 2.2 to 14.0 V
Common-phase input voltage VICM 0 to VCC-1.5 V
range of Hall input
Electrical Characteristics at Ta = 25°C, VCC = 12V, unless especially specified.
Ratings
Parameter Symbol Conditions Unit
min typ max
Circuit Current ICC1 During drive (CT = L) 4 6 8 mA
ICC2 During lock protection (CT = H) 3 4.5 6 mA
Lock detection capacitor charge ICT1 0.9 1.2 1.5 μA
current
Capacitor discharge current ICT2 0.11 0.18 0.25 μA
Capacitor charge and discharge RCT RCD = ICT1/ICT2 5 6.5 8 -
current ratio
CT charge voltage VCT1 1.3 1.5 1.6 V
CT discharge voltage VCT2 0.3 0.5 0.6 V
OUT output L saturation voltage VOL IO = 200mA 0.25 0.45 V
OUT output H saturation voltage VOH IO = 200mA 1.0 1.2 V
Hall input sensitivity VHN Zero peak value 7 15 mV
(including offset and hysteresis)
FG/1/2FG output pin L voltage VFG IFG = 5mA 0.15 0.3 V
FG/1/2FG output pin leak current IFGL VFG = 15V 1 30 μA
Truth Table
IN- IN+ CT OUT1 OUT2 FG RD Mode
H L L H L L * During rotation
L H L H H
- - H off off - - During overheat protection
* 1/2FG provides the output equivalent to the divided FG output.
No.A0603-2/5
LA6587T
Package Dimensions
unit : mm (typ)
3236A
3.0
10 6
3.0
4.9
0.5
1 5
(0.5) 0.5 0.2 0.125
(0.85)
1.1 max
0.08
SANYO : MSOP10(150mil)
Pin Assignment
IN+ 1/2FG
HB FG
IN- LA6587T VCC
CT OUT2
OUT1 GND
Top view
No.A0603-3/5
LA6587T
Block Diagram
VCC
AMP power supply
1.5VRG
HB
IN+
H OUT1
OUT2
IN-
GND
FG
1/2FG
Control
circuit
Charge discharge
Discharge pulse
CT = 0.47 to 1μF
No.A0603-4/5
LA6587T
Sample Application Circuit
Di Cr *4
*1 VCC
1/2FG
R1 FG
HB
*2 H OUT1
IN-
HB
IN+ OUT2
*6
*5 *3
CT GND
H IN-
IN+
On board element
*1 : When the breakdown protective DI at reverse connection is to be used, it is necessary to insert the capacitor Cr to
secure the regenerative current route. Similarly, Cr must be provided to enhance the reliability when there is no
capacitor near the fan power line.
*2 : To obtain Hall bias from VCC, carry out 1VCC 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 : To obtain Hall bias from the HB pin, carry out constant-voltage bias at about 1.5V, which enables the Hall
element to generate the stable Hall output satisfactory in temperature characteristics.
*4 : Keep this open when not using.
*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.
Specifications of any and all SANYO Semiconductor 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 Semiconductor 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.
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Any and all information described or contained herein are subject to change without notice due to
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for the SANYO Semiconductor product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
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This catalog provides information as of December, 2006. Specifications and information herein are subject
to change without notice.
PS No.A0603-5/5
