ON LA6581T-TE-L-H Btl driver single-phase full-wave Datasheet

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
Symbol
Conditions
Ratings
Unit
Supply voltage
VCC max
18
V
Output current
IOUT max
0.30
A
Output withstand voltage
VOUT max
18
V
FG output withstand
VFG max
18
V
FG output current
IFG max
5
mA
Allowable power dissipation
Pd max
400
mW
Operating temperature
Topr
-20 to +90
°C
Storage temperature
Tstg
-55 to +150
°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
Symbol
Supply voltage
VCC
Common-phase input voltage range
VICM
Conditions
Ratings
Unit
2.5 to 16
V
0.3 to VCC-1.5
V
of Hall input
Electrical Characteristics at Ta = 25°C, VCC = 12.0V, unless especially specified.
Parameter
Symbol
Ratings
Conditions
min
Unit
typ
max
IN- = 5.8V, IN+ = 6.0V, RL = ∞
14
19
mA
VOL
IO = 100mA
0.1
0.2
V
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
-10
-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
180
200
°C
Circuit current
ICC
OUT output low voltage
OUT output high voltage
150
* Design guarantee : Design target. Measurement with a single unit not made.
Package Dimensions
unit : mm (typ)
3245B
Pd max - Ta
Allowable power dissipation, Pd max - mW
500
3.0
0.5
3.0
4.9
8
1
(0.53)
2
0.65
1.1MAX
0.125
300
200
192
100
Mounted on a board:
20×10×0.8mm3, paper phenol
0
--20
0
20
40
60
80
90
100
Ambient temperature, Ta - °C
0.08
(0.85)
0.25
Specified board
400
SANYO : MSOP8(150mil)
Truth Table
IN-
IN+
OUT1
H
L
H
L
L
L
H
L
H
off
−
−
off
off
−
OUT2
FG
Mode
During rotation
During overheat protection
No.7192-2/4
LA6581T
Pin Assignment
IN+ 1
8 FG
7 VCC
HB 2
LA6581T
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.7192-3/4
LA6581T
Application Circuit Example
Di
Cr
*4
VCC
*1
R2
*3
LA6581T
*2
H
HB
FG
HB
IN−
OUT1
IN+
OUT2
H
IN−
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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