ATS177
SINGLE OUTPUT HALL EFFECT LATCH
Features
•
•
•
•
•
•
•
•
3.5V to 20V DC operation voltage
Temperature compensation
Wide operating voltage range
Open-Collector pre-driver
25mA maximum sinking output current.
Reverse polarity protection
Lead Free Finish/RoHS Compliant for Lead Free
products (Note 1)
Package: SIP-3L
General Description
ATS177 is an integrated Hall effect latched sensor 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 open-collector output. 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 larger than threshold Bop, DO is turned
on(low). The output state is held until a magnetic flux density
reversal falls below Brp causing DO to be turned off (high).
Applications
•
•
•
•
Brush-less DC Motor
Brush-less DC Fan
Revolution counting
Speed measurement
Ordering Information
ATS177 - X X X - X
Package
P:SIP-3L
Lead
L : Lead Free
Magnetic
Characteristics
-B : Bulk (Note 3)
A or B
-A : Ammo Box (Note 4)
Packing
Note:
1.
RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see
EU Directive Annex Notes 5 and 7.
Device
Lead-free
Package
Code
P
Packaging
(Note 2)
SIP-3L
ATS177-P
2.
Tube/Bulk
Quantity
Part Number
Suffix
1000
-B
7” Tape and Reel
Quantity
Part Number
Suffix
NA
NA
Ammo Box
Quantity
Part Number
Suffix
4000/Box
-A
Note:
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. Bulk is for SIP-3L Straight Lead.
4. Ammo Box is for SIP-3L Spread Lead.
ATS177 Rev. 1
1 of 8
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JANUARY 2007
©
Diodes Incorporated
ATS177
SINGLE OUTPUT HALL EFFECT LATCH
Typical Circuit
+12V
D1
R1
2K
U1
1
VCC OUTPUT
GND
2 ATS177
3
Q1
NPN
L1
L2
R2
3K
+
C1
0.47uF
Q2
NPN
+
C2
0.47uF
Brush-less DC Fan
Functional Block Diagrams
Vcc
1
Regulator
Hall
plate
3
2
DO
Amp
2
Vss
ATS177 Rev. 1
2 of 8
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JANUARY 2007
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Diodes Incorporated
ATS177
SINGLE OUTPUT HALL EFFECT LATCH
Pin Descriptions
177
1
2
3
SIP-3L
Name
Vcc
Vss
DO
P/I/O
P
P
O
Pin #
1
2
3
Description
Positive power supply
Ground
Digital output
Absolute Maximum Ratings
Characteristics
( at T
A
=25
o
C )
Supply Voltage
Reverse Vcc Polarity Voltage
Magnetic Flux Density
Output OFF Voltage
Output “ON” Current
Continuous
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temp.
Package Power Dissipation
SIP-3L
Symbol
V
CC
V
RCC
B
Vce
Ic
TA
Ts
Tj
P
D
Values
20
-20
Unlimited
30
25
-20~+85
-65~+150
150
550
Unit
V
V
V
mA
°C
°C
°C
mW
ATS177 Rev. 1
3 of 8
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JANUARY 2007
©
Diodes Incorporated
ATS177
SINGLE OUTPUT HALL EFFECT LATCH
Electrical Characteristics
Characteristic
Supply Voltage
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Falling Time
Symbol
Vcc
Vce(sat)
Icex
Icc
tr
tf
(T
A
=+ 25°C)
Test Conditions
—
Vcc=14V, Ic=20mA
Vce=14V, Vcc=14V
Vcc=20V, Output Open
Vcc=14V, RL=820Ω,
CL=20pF
Vcc=14V, RL=820Ω,
CL=20pF
Min
3.5
-
-
-
-
-
Typ
-
300
<0.1
5
0.3
0.3
Max
20
700
10
10
1.5
1.5
Units
V
mV
uA
mA
us
us
Test Circuit
14V
DO
RL
RL=820 Ohm
CL=20 pF
CL
Test Circuit
ATS177 Rev. 1
4 of 8
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JANUARY 2007
©
Diodes Incorporated
ATS177
SINGLE OUTPUT HALL EFFECT LATCH
Magnetic Characteristics
(T
A
=25
o
C)
1mT=10Gauss)
A grade
Parameter
Operate Point
Release Point
Hysteresis
B grade
Parameter
Operate Point
Release Point
Hysteresis
*B grade is for SIP-3L package only.
Symbol
Bop
Brp
Bhys
Min.
5
-70
-
Typ.
-
-
80
Max.
70
-5
-
Unit
Gauss
Gauss
Gauss
Symbol
Bop
Brp
Bhys
Min.
-
-100
-
Typ.
-
-
80
Max.
100
-
-
Unit
Gauss
Gauss
Gauss
DO
Output Voltage in Volts
OFF
12
10
8
6
4
OP
RP
Vsat
-200
-100
0
2
ON
100
200
Magnetic Flux Density in Gauss
Typical Magnetic Switch Point vs. Temperuture
100
50
0
Bop
Brp
Bhys
Flux Density (B)
-50
-20
25
80
o
100
Temperature ( C)
ATS177 Rev. 1
5 of 8
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JANUARY 2007
©
Diodes Incorporated
