ATS276
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
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General Descriptionʳ
Features
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On-Chip Hall Sensor with Two Different Sensitivity and
Hysteresis Settings for ATS276
3.5V to 20V Operating Voltage
400mA (avg.) Output Sink Current
Built-in Protecting Diode Only for Chip Reverse Power
Connecting
-20qC to 85qC Operating Temperature
Low Profile 4 Pin SIP Package
Lead Free package: SIP-4L
SIP-4L: Available in “Green” Molding Compound
(No Br, Sb)
Lead Free Finish/RoHS Compliant (Note 1)
ATS276 are integrated Hall sensors with output drivers, mainly
designed for electronic commutation of brush-less DC Fan. This
IC internally includes the regulator, protecting diode, Hall plate,
amplifier, comparator, and a pair of complementary
open-collector outputs (DO, DOB).
While the magnetic flux density (B) is larger than operate point
(Bop), DO will turn on (low), and meanwhile DOB will turn off
(high). Each output is latched until B is lower than release point
(Brp), and then DOᇬDOB transfer each state.
For DC fan application, sometimes need to test power reverse
connection condition. Internal diode only protects chip-side but
not for coil-side. If necessary, add one external diode to block the
reverse current from coil-side.
Applications
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Dual-Coil Brush-Less DC Motor
Dual-Coil Brush-Less DC Fan
Revolution Counting
Speed Measurement
Ordering Information
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ATS276 X - P X - B - X
Version
Package
Lead Free
Packing
G or H
P : SIP-4L
L : Lead Free
G : Green
B : Bulk
Device
Lead-free
Lead-free
Lead-free
Lead-free
Lead-free
ATS276G-PL-B-A
S276G-PL-B-B
ATS276G-PL-B-C
ATS276H-PL-B-A
ATS276H-PL-B-B
ATS276H-PG-B-A
TS276H-PG-B-B
Notes:
Package
Code
P
P
P
P
P
P
P
Packaging
(Note 2)
SIP-4L
SIP-4L
SIP-4L
SIP-4L
SIP-4L
SIP-4L
SIP-4L
Quantity
1000
1000
1000
1000
1000
1000
1000
Bulk
Part Number Suffix
-B
-B
-B
-B
-B
-B
-B
Magnetic
Characteristics
A or B or C
(Note 3)
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Magnetic
Characteristics
A
B
C
A
B
A
B
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
3. Please refer to page 5 (Magnetic Characteristics table).
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ATS276 Rev. 1
1 of 9
www.diodes.com
DECEMBER 2008
© Diodes Incorporatedʳ
ATS276
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
ʳ
Pin Assignments
( Top View )
276
1 2
3
4
SIP-4L
Pin Descriptions
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Name
P/I/O
Pin #
Description
Vcc
P
1
Power Supply Input
DO
O
2
Output Pin
DOB
O
3
Output Pin
GND
P
4
Ground
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Block Diagram
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1
VCC
DO
2
REG.
Hall Plate
DOB
Amp
3
GND
4
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ʳ
ATS276 Rev. 1
2 of 9
www.diodes.com
DECEMBER 2008
© Diodes Incorporatedʳ
ATS276
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
ʳ
Typical Application Circuit
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276
1
2
3
Coil 1
Coil 2
R1
R2
C1
C2
4
V cc
R1 = R2 = 47O
C1 = C2 = 2.2 uF
The R , C value need to be fine tuned
based on coils design.
Brush-Less DC Fan
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Absolute Maximum Ratings
Symbol
VCC
VRCC
B
Ic
TS
PD
TJ
(TA = 25qC)ʳ
Characteristics
Values
Supply Voltage
Reverse VCC Polarity Voltage
Magnetic Flux Density
20
-20
Unlimited
0.4
0.5
0.7
-65~+150
550
150
Continuous
Hold
Peak (Start Up)
Output “on” Current
Unit
Storage Temperature Range
S
R
PackageTPower Dissipation
P
k
P
Di
i
i
Maximum Junction Temperature
M i
J
i T
V
V
A
qC
mW
qC
Recommended Operating Conditions
Symbol
Characteristic
VCC
Supply Voltage (Note 4)
Operating Ambient Temperature
(Note 5)
TA
Notes:
Min
Max
Unit
Operating
Conditions
3.5
20
V
Operating
-20
85
qC
4. The output DO/DOB is switching as magnetic field change (S>300G, N
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