ENA2044 D

Ordering number : ENA2044
LA6587FA
Monolithic Linear IC
Fan Motor Driver
http://onsemi.com
BTL Driver Single-Phase Full-Wave
Overview
The LA6587FA 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 (Micro10)
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Output voltage
Allowable power dissipation
Symbol
Conditions
VCC max
Pd max
Mounted on a specified board*
Ratings
Unit
15
V
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
IRD/FG max
10
mA
withstand voltage
RD/FG output current
HB output current
10
mA
Operating temperature
IB max
Topr
-30 to +90
°C
Storage temperature
Tstg
-55 to +150
°C
* Mounted on a specified board : 20mm×10mm×0.8mm3, paper phenol
Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current, high voltage, or
drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
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
42512 SY 20120323-S00011 No.A2044-1/5
LA6587FA
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
Circuit Current
Lock detection capacitor charge
ICC1
During drive (CT = L)
ICC2
During lock protection (CT = H)
typ
4
ICT1
max
6
8
mA
3
4.5
6
mA
0.9
1.2
1.5
μA
0.11
0.18
0.25
μA
5
6.5
8
-
current
Capacitor discharge current
ICT2
Capacitor charge and discharge
RCT
RCD = ICT1/ICT2
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
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
(including offset and hysteresis)
Truth Table
IN-
IN+
CT
OUT1
OUT2
FG
1/2FG
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.A2044-2/5
LA6587FA
Package Dimensions
unit : mm (typ)
3428
3.0
Pd max -- Ta
0.5
Allowable power dissipation, Pd max -- W
0.55
4.9
3.0
10
1 2
0.5
0.16
1.03
0.25
Specified board : 20mm×10mm×0.8mm3
paper phenol
0.4
0.3
0.2
0.1
0
-30
0.1
0.192
-10
10
30
50
70
90
110
Ambient temperature, Ta -- C
SANYO : Micro10
Pin Assignment
IN+
1/2FG
HB
FG
IN-
LA6587FA
VCC
OUT2
CT
GND
OUT1
(Top view)
No.A2044-3/5
LA6587FA
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.A2044-4/5
LA6587FA
Sample Application Circuit
Di
Cr
*4
VCC
*1
1/2FG
R1
FG
HB
*2
H
IN-
OUT1
IN+
OUT2
HB
*6
*5
CT
*3
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.
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PS No.A2044-5/5
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