Anachip AH284U-PL Hall-effect smart fan motor controller Datasheet

AH266
High Voltage Hall Effect Latch
„ Features
„ General Description
- On-chip Hall plate
- Operating voltage: 4V~28V
- Output current: 400mA(Continuous, 25oC)
- Reverse protection diode only for chip reverse
power connecting (Note)
- Output protection Zener breakdown Vz=62V(Typ)
- Package: SIP-4L
AH266 is an integrated Hall sensor with output
drivers designed for electronic commutation of
brush-less DC motor applications. The device
includes an on-chip Hall voltage generator for
magnetic sensing, a comparator that amplifies the
Hall voltage, and a Schmitt trigger to provide
switching hysteresis for noise rejection, and
complementary darlington open-collector drivers for
sinking large current loads. An internal bandgap
regulator is used to provide temperature
compensated supply voltage for internal circuits and
allows a wide operating supply range.
If a magnetic flux density (B) is larger than operate
point (Bop), DO turn on (low) and DOB turn off
(high). The outputs state is latched prior to reach
release point (Brp). if B< Brp, DO turn off and DOB
turn on. AH266 is rated for operation over
temperature range from -20oC to 85 oC and voltage
range from 4V to 28V. The devices are available in
low cost die forms or rugged 4 pin SIP packages.
(Note)
Protection diode only exists at power pin(1,4) output, not
including pin (2,3).
„ Application
- Dual-coil Brush-less DC Motor
- Dual-coil Brush-less DC Fan
- Revolution Counting
- Speed Measurement
„ Pin Configuration
„ Pin Assignment
Name
4. GND
3. DOB
VCC
2. DO
1. VCC
Description
Positive Power Supply
DO
Output Pin
DOB
Output Pin
GND
Ground
„ Ordering Information
AH266 X - X X X - X
Packing
Wafer Body
Package
Lead
Blank or
A~Z : if necessary
to specify
P: SIP-4L
L : Lead Free
Blank: Normal
Blank : Tube
A : Taping
Magnetic
Characteristics
A or B
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. 0.2 Jan 19, 2005
1/6
AH266
High Voltage Hall Effect Latch
„ Block Diagram
VCC
1
DO
REG.
Hall
Plate
Amp
DOB
„ Typical Application Circuit
266
1
2
coil1
3
coil2
4
Vcc
Brush-less DC Fan
Note: This application circuit can’t protect reverse coil current if power is connecting reverse.
Anachip Corp.
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Rev 0.2 Jan 19, 2005
2/6
AH266
High Voltage Hall Effect Latch
„ Absolute Maximum Ratings (at Ta = 250C )
Parameter
Supply voltage
Output “OFF ” voltage
Output “ON” current
Magnetic flux density
Operating temperature range
Storage temperature range
Power dissipation (Note 2)
Thermal Resistance
Symbol
Rating
Unit
VCC
Vout (off)
Io (con)
Io (hold)
Io (peak)
B
Top
Tstg
PD
θjc
28
28
400 (Note 1)
500
700
Unlimited
-20~+85
-65~+150
550
227
V
V
mA
mA
mA
Gauss
°C
°C
mW
°C/W
Note 1: Io(con) is 150 mA at 85°C
2: See Performance Characteristic for other conditions
„ Electrical Characteristics ( Ta = 25°C )
Characteristic
Symbol
Supply Voltage
Output Zener Breakdown
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Falling Time
Switch Time Differential
Vcc
Vz
Vce(sat)
Icex
Icc
tr
tf
∆t
Conditions
-
Output Turn off
Vcc=24V, Ic=400mA
Vce=24V, Vcc=24V
Vcc=24V, Output Open
Vcc=24V, RL=820Ω, CL=20pF
Vcc=24V, RL=820Ω, CL=20pF
Vcc=24V, RL=820Ω, CL=20pF
Min
Typ
Max
Unit
4
54
-
-
-
-
-
-
-
62
1.1
< 0.1
5
1.0
1.0
3.0
28
70
1.5
10
10
5
1.5
10
V
V
V
µA
mA
µs
µs
µs
„ Test Circuit
24V
266
Vout1(DO)
RL1
Vout2(DOB)
RL2
RL1=RL2=820 Ohm
CL1=CL2=20 pF
CL1
CL2
Anachip Corp.
www.anachip.com.tw
Rev 0.2 Jan 19, 2005
3/6
AH266
High Voltage Hall Effect Latch
„ Magnetic Characteristics (Ta=+25oC)
(1mT = 10 Gauss)
A grade
Characteristic
Operate Point
Release Point
Hysteresis
B grade
Characteristic
Operate Point
Release Point
Hysteresis
Symbol
Min.
Typ.
Max.
Unit
Bop
Brp
Bhy
10
-70
-
80
70
-10
-
Gauss
Gauss
Gauss
Symbol
Min.
Typ.
Max.
Unit
Bop
Brp
Bhy
-100
-
80
100
-
Gauss
Gauss
Gauss
Turn on
Bhy
DO
Output Voltage in Volts
Output Voltage in Volts
DOB
Turn off
Turn off
Vsat
Brp
Turn on
Vsat
Bop
0
Bhy
Brp
Magnetic Flux Density in Gauss
0
Bop
Magnetic Flux Density in Gauss
„ Performance Characteristics (SIP-4L)
25
550
105
198
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
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
Power Dissipation Curve
Pd (mW )
600
500
400
300
200
100
0
0
15
30
45
60
75
85 90
105
120
135
150
Ta (。C)
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Rev 0.2 Jan 19, 2005
4/6
AH266
High Voltage Hall Effect Latch
„ Operation Characteristics
S
Marking side
( Output Voltage )
DO
N
( SIP4 )
Vcc
Vd
High
Bhy
Low
Vsat
Brp
N
0
Bop
S
( Magnetic flux density )
„ Marking Information
( Front View )
Part Number
266
X XX X X
Blank: normal
L: Lead Free Package
ID Code: A ~ Z
Nth week: 01~52
Year: "1" = 2001
"2" = 2002
Anachip Corp.
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Rev 0.2 Jan 19, 2005
5/6
AH266
High Voltage Hall Effect Latch
„ Package Information
Active Area Depth
Package Sensor Location
Marking side
1.971mm
1.046mm
1
0.7mm
2
3
4
Package Dimension
o
5 -7
o
14.25mm
+/-1.25mm
1.55mm
+/-0.1mm
1.03mm
+/-0.1
o
3 -5
0.38mm
+/-0.03mm
o
3.65mm
+/-0.1mm
o
5 -7
o
o
3 -5
0.41mm
+/-0.03mm
3.81mm
+/-0.03mm
0.46mm +/-0.03mm
5.22mm
+/-0.1mm
4.20mm
+/-0.1mm
0.30mm
+/-0.1mm
o
0.2mm Max.
1.42mm+/-0.1mm
Anachip Corp.
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1.27mm
+/-0.03mm
Rev 0.2 Jan 19, 2005
6/6
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