Datasheet

UNISONIC TECHNOLOGIES CO., LTD
SK1288
LINEAR INTEGRATED CIRCUIT
2-PHASE DC-FAN MOTOR
DRIVER
DESCRIPTION
SK1288 is a 2-Phase driver for DC-Fan motor . Build-in hall
amplifier with hysteresis. Low switching noise and effective motor
driver are further advantages . Support the function of motor lock
protection , auto-restart , rotation detection signal output .
SOP-8
FEATURES
* Wide supply voltage range of 2.5V to 20V
*Output current Io(max)=600mA
*Operate with Hall element
*Lock protection
*Auto-restart when the motor lock is undone
*FG(frequency generator) output
*SOP-8 package
*Pb-free plating product number: SK1288L
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
SK1288-S08-R
SK1288L-S08-R
SK1288-S08-T
SK1288L-S08-T
Package
Packing
SOP-8
SOP-8
Tape Reel
Tube
SK1288L-S08-R
(1)Packing Type
(2)Package Type
(3)Lead Plating
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Copyright © 2005 Unisonic Technologies Co., Ltd
(1) R: Tape Reel, T: Tube
(2) S08: SOP-8
(3) L: Lead Free Plating, Blank: Pb/Sn
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QW-R109-024,A
SK1288
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
CT
1
8
FG
VCC
2
7
HIN
A2
3
6
HIP
GND
4
5
A1
BLOCK DIAGRAM
Vcc
REGULATOR
FG output
H+
CONTROL
BLOCK
H-
A1
Hysteresis
amplifier
LOCK PROTECTION
AUTORESTART
BLOCK
CT
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A2
GND
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SK1288
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta = 25℃)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply voltage
VCC
2.5V ~ 20V
V
Supply current
ICC
20
mA
Circuit current
Io
600
mA
FG output current
IFG
20
mA
Power dissipation
PD
700
mW
Hall input common mode voltage range
VHIC
1.0 ~ VCC-0.5
V
Operating ambient temperature
TOPR
-20 ~ +85
℃
Storage temperature
TSTG
-55 ~ +150
℃
Note 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. The device is guaranteed to meet performance specification within 0℃~+70℃ operating temperature range
and assured by design from -20℃~+85℃.
ELECTRICAL CHARACTERISTICS (Ta=25℃ , VCC=3V)
PARAMETER
Current drain
SYMBOL
ICC
Lockup detection capacitor charge current
Capacitor discharge current
Capacitor charge/discharge current ratio
CT charge voltage
CT discharge voltage
Output low level voltage
ICT1
ICT2
RCT
VCT1
VCT2
VOL
Hall input sensitivity
VHIN
FG output pin low voltage
FG output pin leakage current
VFG
IFG(LEAK)
CONDITIONS
MIN
In drive mode (CT=L)
In lockup protection mode (CT=H )
V 1PIN = 1.3V
0.9
V 1PIN = 1.3V
0.5
IO=200mA
Zero peak value
(including offset and hysteresis)
IFG=5mA
VFG=15V
UNISONIC TECHNOLOGIES CO., LTD
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TYP MAX UNIT
13
mA
3
mA
1.2 1.5
uA
0.6 0.8
uA
2.5
1.3
V
0.3
V
0.3 0.7
V
3
15
0.11
1
mV
V
uA
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QW-R109-024,A
SK1288
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
VIN
10KΩ
Vcc
FG
FG output
Hall
element
A1
H+
A2
HCT
GND
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QW-R109-024,A
SK1288
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
1. Icc
0V
2V
FG
H-
H+
A1
CT
Vcc
A2
GND
CT "H" = 2V
CT "L" = 0V
5V
2. CT charge / discharge
0V
2V
CT(I)
discharge
0
FG
H-
H+
charge
A1
0
CT
Vcc
A2
GND
2
CT(V)
0
CT(V)
CT(I)
discharge
0
CT = 0V ~2 V
5V
charge
2
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QW-R109-024,A
SK1288
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT(Cont.)
3. VOL
0V
FG
CT
2V
H -
H+
A1
Vcc
A 2
GND
H+
H-
A1
A2
FG
H
L
L
H
H
L
H
H
L
L
200mA
Output
"L"
DC
V
5V
4. Hall input offset
2V
1.5V ~2.5V
10K
FG
H -
H+
A1
CT
Vcc
A 2
GND
5V
V
5V
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QW-R109-024,A
SK1288
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT (Cont.)
5. VFGL & I FGL
2V
0V
5mA
FG
DC
FG = L
VFGL
FG
CT
H -
Vcc
H+
V
A1
A 2
GND
2V
FG
I
IFGL
5V
6. FG leakage
0V
2V
15V
I
FG = H
FG
CT
H -
Vcc
H+
A 2
A1
GND
5V
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QW-R109-024,A
SK1288
LINEAR INTEGRATED CIRCUIT
LOCK DETECTION
H+
ON
OFF
A2
CT
Motor locked
ton
Reverts to normal operation
toff
Motor lock detected
Motor lock cleared
FG output
OFF
UTC 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 UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R109-024,A
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