Hall IC Fan Motor Driver
DESCRIPTION
SD1579 is a one-chip, two phase Hall IC fan driver use the advanced
BICDMOS process
.
Power output stage using LDMOS transistors, with
low Rdson, low power dissipation and capable of withstanding high
output drive current.
The driver of the motor circuit built-in Locked-rotor protection circuit,
with automatic restart function. Built-in voltage regulator circuit for the
Hall sensor and amplifier circuit to provide internal power supply;
The dynamic compensation circuit capable of providing good
consistency and very small magnetic shift of the window over the whole
temperature range,.
Built-in Zener output as the output protection management and in the
supply-side built-in reverse protection diodes, which can effectively
prevent damage when the power supply circuit is reverse.
TO - 94
APPLICATIONS
* Dual coils brush-less DC fan;
* Dual coils brush-less DC motor.
FEATURES
* Built-in lock protection circuit;
* Built-in Auto restart circuit;
* Built-in Hall sensor with high stability of the dynamic compensation
circuit;
* Built-in Hall amplifier with hysteresis;
* Built-in Zener Diodes protect outputs circuit;
* Built-in Voltage Regulator circuit.
* Built-in Reverse-voltage protection diode
* Hall magnetic window, consistency and temperature stability;
* Wide operating voltage range, small quiescent current;
* Low Rdson, high drive current capability;
ORDERING INFORMATION
Part No.
SD1579
Package
TO-94
Marking
1579
Material
Pb free
Package Type
Bulk
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.0
2009.11.11
Page 1 of 7
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Characteristics
V
CC
Maximum Supply Voltage
Maximum Output Current (Fault)
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
Symbol
V
CC
max
I
out(AVE)
I
out(PEAK)
Pd
T
amb
T
stg
T
j
Ratings
30
500
700
550
-40 ~ 125
-55 ~ 150
150
Unit
V
mA
mA
mW
°C
°C
°C
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum-rated
conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Unless specified particularly T
amb
=25°C, V
CC
=12V)
Characteristics
Supply Voltage
Supply Current
Output Saturation voltage
Output Saturation voltage
Thermal Resistance
Locked-Rotor Period
Locked-Rotor Period
Output Zener-breakdown Voltage
Symbol
V
CC
I
CC
V
DSS
V
DSS
R
th
t
on
t
off
Vz
35
Test Conditions
Operating
Operating
I
out
=300 mA
I
out
=500 mA
Operating
Min.
~
~
~
~
Typ.
12
2.0
210
350
227
0.5
3
42
60
Max.
28
*
Unit
V
mA
mV
mV
°C /W
S
S
V
4.0
300
500
*Note: Please used in power dissipation limitation for all coil with different efficiency.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.0
2009.11.11
Page 2 of 7
MAGNETIC CHARACTERISTICS
(Unless specified particularly T
amb
=25°C, V
CC
=12V, 1mT=10Gauss)
Characteristics
Operate Point
Release Point
Hysteresis
Symbol
Bop
BRP
BHYS
Test Conditions
Operating
Operating
Operating
Min.
10
-60
~
Typ.
30
-30
60
Max.
60
-10
~
Unit
GS
GS
GS
When flux B is over operation point Bop, Do is on and output low voltage, DOB is off and output high voltage.
Every output is locking until the flux B is less than release point Brp, then DO and DOB switch the states.
PIN CONFIGURATION
PIN DESCRIPTION
Pin No.
1
2
3
4
Pin Name
V
DD
DO
DOB
GND
I/O
--
O
O
--
Power supply
Driver Output pin
Driver Output pin
Ground
Description
HALL SENSOR LOCATION
Value
X
Y
2.3
1.09
Unit
mm
mm
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.0
2009.11.11
Page 3 of 7
FUNCTION DESCRIPTION
This IC detects the rotation of the motor by hall signal, and adjusts lock detection ON time (T
ON
) =0.5S and lock
detection OFF time (T
OFF)
=3.0S by internal counter. The time (T
NO
, T
OFF
) sequence is shown below.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.0
2009.11.11
Page 4 of 7
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