ATS276
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
Features
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
-20 C to 85 C 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)
General Description
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
DO DOB
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
Dual-Coil Brush-Less DC Motor
Dual-Coil Brush-Less DC Fan
Revolution Counting
Speed Measurement
Ordering Information
ATS276 X - P X - B - X
Version
G or H
Package
P : SIP-4L
Lead Free
L : Lead Free
G : Green
Packing
B : Bulk
Magnetic
Characteristics
A or B or C
(Note 3)
Magnetic
Characteristics
A
B
C
A
B
A
B
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
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).
ATS276 Rev. 1
1 of 9
www.diodes.com
DECEMBER 2008
©
Diodes Incorporated
ATS276
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
Pin Assignments
( Top View )
276
1 2
3
4
SIP-4L
Pin Descriptions
Name
V
cc
DO
DOB
GND
P/I/O
P
O
O
P
Pin #
1
2
3
4
Description
Power Supply Input
Output Pin
Output Pin
Ground
Block Diagram
1
V
CC
DO
2
REG.
Hall Plate
Amp
DOB
3
GND
4
ATS276 Rev. 1
2 of 9
www.diodes.com
DECEMBER 2008
©
Diodes Incorporated
ATS276
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
Typical Application Circuit
276
Coil 1
Coil 2
1
V
cc
2
3
4
R1 = R2 = 47O
C1 = C2 = 2.2 uF
The R , C value need to be fine tuned
based on coils design.
R1
C1
R2
C2
Brush-Less DC Fan
Absolute Maximum Ratings
Symbol
V
CC
V
RCC
B
Ic
T
S
P
D
T
J
(T
A
= 25 C)
Characteristics
Supply Voltage
Reverse V
CC
Polarity Voltage
Magnetic Flux Density
Output “on” Current
Storage Temperature Range
S
R
PackageT
Power Dissipation
P k
Di i i
MaximumP
Junction Temperature
M i
J
i T
Continuous
Hold
Peak (Start Up)
Values
20
-20
Unlimited
0.4
0.5
0.7
-65~+150
550
150
Unit
V
V
A
C
mW
C
Recommended Operating Conditions
Symbol
V
CC
T
A
Notes:
Characteristic
Supply Voltage (Note 4)
Operating Ambient Temperature
(Note 5)
Conditions
Operating
Operating
Min
3.5
-20
Max
20
85
Unit
V
C
4. The output DO/DOB is switching as magnetic field change (S>300G, N<-300G).
5. Shall not exceed P
D
and Safety Operation Area.
ATS276 Rev. 1
3 of 9
www.diodes.com
DECEMBER 2008
©
Diodes Incorporated
ATS276
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
Electrical Characteristics
Symbol
V
ce
Vz
V
ce(SAT)
I
cex
I
cc
tr
tf
t
Notes:
(T
A
= +25 C, Vcc = 4.0V to 20V)
Characteristic
Low Supply Voltage
Output Zener Breakdown
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Falling Time
Switch Time Differential
Conditions
V
cc
= 3.5V, I
L
= 100mA
(Note 6)
V
cc
= 14V, I
L
= 300mA
V
ce
= 14V, V
cc
= 14V
V
cc
= 20V, Output Open
V
cc
= 14V, R
L
= 820 , C
L
= 20pF
V
cc
= 14V, R
L
= 820 , C
L
= 20pF
V
cc
= 14V, R
L
= 820 , C
L
= 20pF
Min
Typ.
0.4
46
0.3
<0.1
16
3.0
0.3
3.0
Max
Units
V
V
V
μA
mA
μs
μs
μs
0.6
10
25
10
1.5
10
6. The Vz may vary with the inductance/resistance of DC Fan. In order to reduce the risk of dynamic operation, the capacitor/ resistor is
recommended to add below the DO/DOB as Application Circuit (see General Description on page 1).
Test Circuit
14 V
276
RL 1
DO
DOB
RL 2
RL 1 = RL 2 = 820 Ohm
CL 1 = CL 2 = 20 pF
CL 1 CL 2
ATS276 Rev. 1
4 of 9
www.diodes.com
DECEMBER 2008
©
Diodes Incorporated
ATS276
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
Magnetic Characteristics
A grade
Symbol
Bop
Brp
Bhy
B grade
Symbol
Bop
Brp
Bhy
C grade
Symbol
Bop
Brp
Bhy
(T
A
= +25 C, Vcc = 14V)
( 1mT = 10 Gauss )
Characteristic
Operation Point
Release Point
Hysteresis
Min
10
-50
-
Typ.
-
-
75
Max
50
-10
-
Unit
Gauss
Gauss
Gauss
Characteristic
Operation Point
Release Point
Hysteresis
Min
5
-70
-
Typ.
-
-
75
Max
70
-5
-
Unit
Gauss
Gauss
Gauss
Characteristic
Operation Point
Release Point
Hysteresis
Min
-
-100
-
Typ.
-
-
75
Max
100
-
-
Unit
Gauss
Gauss
Gauss
DO
( Output Voltage )
( Output Voltage )
DOB
V
cc
( off-state )
( off-state )
V
cc
Turn off
B
hy
Turn on
Turn on
B
hy
Turn oFF
( on-state )
VSAT
( on-state )
VSAT
B
rp
0
B
op
B
rp
0
B
op
( Magnetic Flux Density B )
( Magnetic Flux Density B )
ATS276 Rev. 1
5 of 9
www.diodes.com
DECEMBER 2008
©
Diodes Incorporated
