ENA2125 D

Ordering number : ENA2125
LA6584JA
Monolithic Linear IC
Single-phase Full-wave Driver
For Fan Motor
http://onsemi.com
Overview
The LA6584JA is Single-phase bipolar fan motor is put into silent driving by means of BTL output linear drive,
offering high efficiency and power saving by suppressing the reactive current. Lock protection and rotation signal (FG,
RD) circuits are built in, ensuring optimum application to small fans for notebook PC, consumer equipment power
supply, car audio system, CPU cooler, etc. that require high reliability and low noise.
Functions and Applications
• Single-phase full-wave driver for fan motor
Specitications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Output voltage
VCC max
15
V
Output current
IOUT max
1.2
A
Output withstand voltage
VOUT max
15
V
RD/FG output pin output
VRD/FG max
15
V
5
mA
10
mA
Withstand voltage
RD/FG output current
IRD/FG max
HB output voltage
IB max
Allowable dissipation
Pd max
Operating temperature range
Storage temperature range
Mounted on a specified board*
0.8
W
Topr
-30 to +90
°C
Tstg
-55 to +150
°C
* Mounted on a specified board (114.3mm × 76.1mm × 1.6mm, Glass epoxy)
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
O1012NKPC 20120305-S00001 No.A2125-1/5
LA6584JA
Recommended Operating Range at Ta = 25°C
Parameter
Conditions
Supply voltage
VCC
Common-phase input voltage
VICM
Conditions
Ratings
Unit
2.8 to 14.0
V
0 to VCC-1.5
V
range of Hall input
Electrical Characteristics at Ta = 25°C VCC = 12V, unless otherwise specified.
Ratings
Parameter
Conditions
Circuit current
Conditions
min
typ
Unit
max
ICC1
During drive (CT = L)
4
6
9
mA
ICC2
During lock protection (CT = H)
2
4
6
mA
ICT1
2.0
2.8
3.5
μA
Capacitor discharge current
ICT2
0.15
0.23
0.30
μA
Capacitor charge and discharge
RCT
9
12
15
-
1.6
1.7
1.8
V
0.6
Lock detection capacitor charge
current
RCD = ICT1/ICT2
current ratio
CT charge voltage
VCT1
CT discharge voltage
VCT2
0.7
0.8
V
OUT output L saturation voltage
VOL
IO = 200mA
0.2
0.3
V
OUT output H saturation voltage
VOH
IO = 200mA
0.9
1.2
V
Hall input sensitivity
VHN
Zero peak value
7
15
mV
RD/FG output pin L voltage
VRD/FG
IRD/FG = 5mA
0.1
0.2
V
RD/FG output pin leak current
IRD/FGL
VRD/FG = 15V
1
30
μA
HB output L voltage
VHBL
IHB = 5mA
1.5
1.7
V
(including offset and hysteresis)
1.3
Package Dimensions
unit : mm (typ)
3179C
Pd max -- Ta
6.5
0.5
6.4
11
4.4
20
1
10
0.65
0.15
0.22
1.5max
(1.3)
(0.33)
Allowable power dissipation, Pd max -- W
1.0
Specified board: 114.3×76.1×1.6mm3
Material: Glass epoxy
0.8
0.6
0.4
0.38
0.2
0
--30 --20
0
20
40
60
80
90
100
0.1
Ambient temperature, Ta -- °C
SANYO : SSOP20(225mil)
No.A2125-2/5
LA6584JA
Truth Table
IN-
IN+
CT
OUT1
H
L
L
H
L
H
L
-
-
OFF
OFF
-
H
OUT2
FG
RD
Mode
L
L
L
During rotation
H
H
H
Lock protection
Pin Assignment
FGND
1
20
FGND
FGND
2
19
FGND
FGND
3
18
FGND
OUT2
4
17
OUT1
NC
5
16
NC
LA6584JA
VCC
6
15
CT
NC
7
14
IN-
FG
8
13
HB
RD
9
12
IN+
NC
10
11
NC
Top view
No.A2125-3/5
LA6584JA
Sample Application Circuit
Di
Cr
*4
*1
VCC
R2
FG
HB
H
*2
RD
OUT1
IN-
HB
OUT2
IN+
R1
R2
*5
CT
GND
*3
H
IN-
On board element
IN+
*1
*2
*3
*4
*5
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.
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.
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.)
Keep this open when not used.
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.A2125-4/5
LA6584JA
Internal Equivalent Circuit
VCC
1.5VRG
HB
H
IN+
OUT1
OUT2
IN-
GND
FG
Control
Circuit
Charge/discharge circuit
RD
Discharge
pulse
CT = 0.47 to 1µF
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PS No.A2125-5/5
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