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AH285
Hall-Effect Smart Fan Motor Controller Features
- On chip Hall sensor - Rotor-locked shutdown - Automatically restart - Frequency generator (FG) output - Buil t-in Zener protection for output driver - Operating voltage: 3.8V~20V - Output current: IO(AVE) = 500mA for SIP-5/SOT89-5 - Output current: IO(AVE) = 400mA for SOT23-5 - Package: SIP-5L, SOT23-5L, SOT89-5L
General Description
AH285 is a monolithic fan motor controller with Hall sensor's capability. It contains two complementary open-drain transistors as motor coil drivers, automatic lock current shutdown, and recovery protections. Additional, frequency generator (FG) output is for speed detection relatively. To avoid coil burning, rotor-lock shutdown detection circuit shut down the output driver if the rotor is blocked and then the automatic recovery circuit will try to restart the motor. This function repeats while the rotor is blocked. Until the blocking is removed, the motor recovers running normally.
Pin Configuration
285 ( Front View )
1 : FG 2 : Vdd 3 : DO 4 : DOB 5 : GND
123 45
Pin Descriptions
Symbol FG Vdd DO DOB GND Description Frequency generation Input power Output pin Output pin Ground
SIP-5L
Vdd 5 Vdd 1 GND 2 DO 3 SOT89-5L 285 7 DOB 4 5 FG 285 DOB 4
1 FG
2
3
GND DO SOT23-5
Ordering Information
AH285 X - X X X
Wafer Body Blank or A~Z : if necessary to specify
Package P: SIP-5L W: SOT23-5L Y: SOT89-5L
Lead L : Lead Free
Packing Blank : Bulk A : Tape & Reel (for SOT Packages Only)
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
Rev. 1.0 Sep 29, 2005 1/9
AH285
Hall-Effect Smart Fan Motor Controller Block Diagram (SIP5)
Vdd 2
Lock shutdown and Automatic recovery Regulator
3
Hall Plate
DO
Amp.
Control Logic
4
DOB
5 GND
1 FG
Typical Application Circuit (SIP5)
D2 Vdd (12V) Rpu D1
1 2
285
Coil2
3 4 5
Coil1
FG
C3
GND
R1
Notes: R1, R2: typical 56 C1, C2, C3: typical 2.2 F The R, C value need to be fine tuned base on coils design.
R2 C2
C1
12V DC Brush-less Fan with FG output function
Anachip Corp. www.anachip.com.tw 2/9
Rev 1.0 Sep 29, 2005
AH285
Hall-Effect Smart Fan Motor Controller Absolute Maximum Ratings
Characteristics Supply Voltage Output Current IO(AVE) (Ta = 25C) Symbol Vdd SIP5/SOT89-5 SOT23-5 IO(PEAK) Power Dissipation Operating Temperature Storage Temperature Maximum Junction Temp. Thermal Resistance jc PD Topr Tstg Tj SIP5 SOT23-5 SOT89-5 SIP5 SOT23-5 SOT89-5 Rating 24 500 400 700 550 230 800 -40 ~ 100 -55 ~ 150 150 227 543 156 Unit V mA
mW C C C C/W
Electrical Characteristics (Ta = 25 C, Vdd = 12V, unless otherwise notice)
Characteristics Supply Voltage Supply current Output Leakage Current Locked Protection On Locked Protection Off Output saturation voltage Symbol Vdd Idd Ioff Tlrp-on Tlrp-off Conditions Operating Operating VOUT=24V Min. 3.8 0.4 2.4 35 Typ. 2 < 0.1 0.5 3 375 625 1.25 0.5 42 Max. 20 4 10 0.6 3.6 500 900 1.67 60 Unit V mA A Sec Sec
VOUT( sat ) Rds(on) Vol Vz
Output On resistance FG output Vds Output Zener-breakdown Voltage
IO=300mA IO=500mA IO=300mA IO=10mA
mV ohm V V
Magnetic Characteristics (Ta = 25 C, Vdd = 12V, unless otherwise specified)
(1mT=10 Gauss)
Characteristics Symbol Min. Typ. Max. Unit
Operate Point Release Point Hysteresis
Bop Brp Bhy
10 -60 -
30 -30 60
60 -10 -
Gauss Gauss Gauss
Anachip Corp. www.anachip.com.tw 3/9
Rev 1.0 Sep 29, 2005
AH285
Hall-Effect Smart Fan Motor Controller Operating Characteristics
DOB DO
Output Voltage in Volts
RP
OFF
Output Voltage in Volts
12 10 8 6 4 2
OFF
12 10 8 6 4 2
OP
ON
OP Vsat
RP
ON
Vsat Brp 0 Bop
Brp
0
Bop
Magnetic Flux Density in Gauss
Magnetic Flux Density in Gauss
S
S
Marking side
S
Marking side
Marking side
N
( SOT23-5 )
N
( SIP5 )
N
( SOT89-5 )
Performance Characteristics (SIP5)
Ta (C) Pd (mW) Ta (C) Pd (mW)
P d (m W ) 600 500 400 300 200 100 0 0 25 50 75 100 125 150 T a ( C )
25 550 105 198
50 440 110 176
60 396 115 154
70 352 120 132
80 308 125 110
85 286 130 88
90 264 135 66
95 242 140 44
100 220 150 0
P o w e r D is s ip a tio n C u rve
Anachip Corp. www.anachip.com.tw 4/9
Rev 1.0 Sep 29, 2005
AH285
Hall-Effect Smart Fan Motor Controller Performance Characteristics (SOT23-5)
Ta (C) 25 50 60 70 80 90 100 110 120 130 140 150
Pd (mW)
230
184
166
147
129
110
92
74
55
37
18
0
P d (m W )
P o w e r D is s ip a tio n C u rv e 300 200 100 0 0 25 50 75 100 125 150
T a ( C )
Performance Characteristics (SOT89-5)
Ta (C) 25 50 60 70 75 80 85 90 95 100
Pd (mW)
Ta (C)
800
105
640
110
576
115
512
120
480
125
448
130
416
135
384
140
352
145
320
150
Pd (mW)
P d (m W )
288
256
224
192
160
128
96
64
32
0
P o w e r D is s ip a tio n C u r v e
900 800 700 600 500 400 300 200 100 0 0 25 50 75 100 125 150
T a ( C )
Anachip Corp. www.anachip.com.tw 5/9
Rev 1.0 Sep 29, 2005
AH285
Hall-Effect Smart Fan Motor Controller Marking Information
(1)SIP-5L
( Front View ) Part Number
285
X XX X x
Wafer Lot ID: L & a~z is lead-free products ID Code: A ~ Z Nth week: 01~52 Year: "1" = 2001 "2" = 2002
(2)SOT23-5L
(Top View) ID code A~Z: Non-Lead Free a~z: Lead Free R5:AH285 Date code Y : Year M :Month(A~L)
XX YM X
(3)SOT89-5L
5
4
7
285 Y M X
ID code A~Z : Non-Lead Free a~z : Lead Free M : Month: A~L Y : Year: 0-9
1
2
3
Anachip Corp. www.anachip.com.tw 6/9
Rev 1.0 Sep 29, 2005
AH285
Hall-Effect Smart Fan Motor Controller Package Information
(1)Package type: SIP-5L
( unit: mm / [inch] )
5.22 0.1 [0.206 0.003 ]
2 ~ 3
2-0.3C [0.079-0.012C] 2 ~ 5 1.55 0.1 [0.061 0.003] 4.2 REF [0.165 REF] 2 ~ 5 3.65 0.1 [0.144 0.003] 0.48 0.1 [0.019 0.003] 14.3 0.3 [0.563 0.012] 0.41 0.03 [0.016 0.001] 0.73 0.1 [0.029 0.003] 2 ~ 3
0.95 0.03 [0.037 0.001]
0.38 0.03 [0.015 0.001]
Location of Sensing Point
2.006 mm [0.079 inch]
( Top View)
1.016 mm [0.04 inch]
1
2
3
4
5
Anachip Corp. www.anachip.com.tw 7/9
Rev 1.0 Sep 29, 2005
AH285
Hall-Effect Smart Fan Motor Controller
(2) SOT23-5L
D
HE
E
GAUGE PLANE L L1
Y
X e
e1
VIEW C
1(4x)
A2
A
2(4x)
b(5x)
Symbol
Dimensions In Millimeters Min. 1.05 0.05 1.00 0.25 0.08 2.70 1.50 2.60 0.30 0.50 1.80 0.85 0o 3o o 6 Nom. 1.10 2.90 1.60 2.80 0.60 1.90 0.95 5o 5o o 8 1.067 0.432 Max. 1.35 0.15 1.20 0.50 0.20 3.00 1.70 3.00 0.60 0.70 2.00 1.05 10o 7o o 10 -
A1
SEE VIEW C
Dimensions In Inches Min. 0.041 0.002 0.039 0.010 0.003 0.106 0.059 0.102 0.012 0.020 0.071 0.033 0o 3o o 6 Nom. 0.043 0.114 0.063 0.110 0.024 0.075 0.037 5o 5o o 8 0.042 0.017 Max. 0.053 0.006 0.047 0.020 0.008 0.118 0.067 0.118 0.024 0.028 0.079 0.041 10o 7o o 10 -
A A1 A2 b C D E HE L L1 e e1 1 2 X Y
Anachip Corp. www.anachip.com.tw 8/9
C
Rev 1.0 Sep 29, 2005
AH285
Hall-Effect Smart Fan Motor Controller
(3) Package type: SOT89-5L
A C D F
E
B K
J F L I H G
Package Sensor Location
Y
X
Symbol
A B C D E F G H I J K L X Y
Dimensions In Millimeters Min. Nom. Max. 4.40 4.50 4.60 4.05 4.15 4.25 1.50 1.60 1.70 1.30 1.40 1.50 2.40 2.50 2.60 0.80 3.00 Ref. 1.50 Ref. 0.40 0.46 0.52 1.40 1.50 1.60 0.35 0.39 0.43 5o Typ. 1.90 1.65 -
Dimensions In Inches Min. Nom. Max. 0.173 0.177 0.181 0.159 0.163 0.167 0.059 0.063 0.067 0.051 0.055 0.059 0.094 0.098 0.102 0.031 0.118 Ref. 0.059 Ref. 0.016 0.018 0.020 0.055 0.059 0.063 0.014 0.015 0.017 5o Typ. 0.075 0.065 -
Anachip Corp. www.anachip.com.tw 9/9
Rev 1.0 Sep 29, 2005

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