Not Recommended for New Design
Actual Package is SC-59, not SOT-23
ATC
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
- Package: SIP3, SOT23
ATS177
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 - X
Wafer Body
Blank or
A~Z : if necessary
to specify
Package
P: SIP3
W: SOT23
Lead
L : Lead Free
Packing
Blank : Bulk
A : Tape & Reel
(for SOT23 Only)
Magnetic
Characteristics
A or B
Typical Application 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
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 Oct 13, 2005
1/7
Not Recommended for New Design
Actual Package is SC-59, not SOT-23
ATC
Single Phase Hall Effect Latch
Functional Block Diagrams
ATS177
Vcc
1
Regulator
Hall
plate
3
2
DO
Amp
2
Vss
Pin Descriptions
177
2
Top view
177
1 : Vcc
1
3
2 : Vss
3 : DO
1
2
3
Name
Vcc
Vss
DO
P/I/O
P
P
O
Pin #
1
2
3
Description
Positive power supply
Ground
Digital output
Anachip Corp.
www.anachip.com.tw
2/7
Rev.1.0 Oct 13, 2005
Not Recommended for New Design
Actual Package is SC-59, not SOT-23
ATC
Single Phase Hall Effect Latch
Absolute Maximum Ratings
Characteristics
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.
SIP-3L
Package Power Dissipation
SOT23-3L
( at Ta=25
o
C )
Symbol
V
CC
V
RCC
B
Vce
Ic
Ta
Ts
Tj
Pd
Values
20
-20
Unlimited
30
25
-20~+85
-65~+150
150
550
230
Unit
V
V
V
mA
°C
°C
°C
mW
mW
ATS177
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
(Ta=+ 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
Anachip Corp.
www.anachip.com.tw
3/7
Rev.1.0 Oct 13, 2005
Not Recommended for New Design
Actual Package is SC-59, not SOT-23
ATC
Single Phase Hall Effect Latch
Magnetic Characteristics
A grade
Parameter
Operate Point
Release Point
Hysteresis
B grade
Parameter
Operate Point
Release Point
Hysteresis
*B grade is for SIP package only.
ATS177
(Ta= 25°C)
(1mT=10Gauss)
Symbol
Bop
Brp
Bhys
Min.
5
-70
-
Typ.
-
-
80
Max.
70
-5
-
Unit
Gauss
Gauss
Gauss
Symbol
Bop
Brp
Bhys
DO
Min.
-
-100
-
Typ.
-
-
80
Max.
100
-
-
Unit
Gauss
Gauss
Gauss
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)
Anachip Corp.
www.anachip.com.tw
4/7
Rev.1.0 Oct 13, 2005
Not Recommended for New Design
Actual Package is SC-59, not SOT-23
ATC
Single Phase Hall Effect Latch
Performance Characteristics (SIP3)
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
P d (m W )
600
500
400
300
200
100
0
0
25
50
75
85
ATS177
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
25
550
105
198
50
440
110
176
P o w e r D is s ip a tio n C u rv e
100
125
150
T a (。 C )
Performance Characteristics (SOT23-3)
Ta (°C)
25
50
184
60
166
70
147
80
129
85
120
90
110
100
92
110
74
120
55
125
46
130
37
140
18
150
0
Pd (mW) 230
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
85
100
125
150
T a (。 C )
Marking Information
(1) SOT23
(Top View)
ID code
A~Z: Non-Lead Free
a~z: Lead Free
J7:ATS177
(2) SIP3
(Top View)
177
YWW X
XX YM X
ID code
A~Z: Non-Lead Free
a~z : Lead Free
Date code
Y : Year
WW : Nth week
Date code
Y : Year
M :Month (A~L)
Anachip Corp.
www.anachip.com.tw
5/7
Rev.1.0 Oct 13, 2005
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