Anachip ATS277D-P-A Complementary output hall effect latch Datasheet

ATC
ATS276/277
Complementary Output Hall Effect Latch
„ Features
„ General Description
- On-chip Hall sensor with two different sensitivity
and hysteresis settings for ATS276/277
- 3.5V to 20V operating voltage
- 400mA (avg) output sink current
- Build-in protecting diode only for chip reverse
power connecting
- -20°C to 85°C operating temperature
- Low profile 4 pin SIP package
ATS276/277 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
ATS27X X - X X X - X
Part No.
Wafer Body
Package
Lead
Packing
Magnetic
Characteristics
6 : ATS276
7 : ATS277
Blank or
A~Z : if necessary
to specify
P: SIP-4L
L : Lead Free
Blank: Normal
Blank : Tube or Bulk
A : Tape & Reel
276:A or B or C
277:A or B
„ Typical Application Circuit
27X
1
2
3
coil1
coil2
4
Vcc
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.B1 Mar 17, 2004
1/7
ATC
ATS276/277
Complementary Output Hall Effect Latch
„ Block Diagram
1
VCC
DO
2
REG.
Hall Plate
DOB
Amp
3
GND
4
„ Pin Assignment
Front View
277
(276)
1 : VCC
2 : DO
3 : DOB
1 2
3
4 :GND
4
Name
P/I/O
Pin #
Vcc
DO
DOB
GND
P
O
O
P
1
2
3
4
Description
Power Supply Input
Output Pin
Output Pin
Ground
Anachip Corp.
www.anachip.com.tw
Rev.B1 Mar 17, 2004
2/7
ATC
ATS276/277
Complementary Output Hall Effect Latch
„ Absolute Maximum Ratings ( at Ta=25°C )
Characteristics
Supply voltage
Reverse VCC Polarity Voltage
Magnetic flux density
Continuous
Output “on” current
Hold
Peak (Start Up)
Operating temperature range
Storage temperature range
Package Power Dissipation
Maximum Junction Temp
Symbol
Values
Unit
VCC
VRCC
B
20
-20
V
V
Ic
Ta
Ts
PD
Tj
Unlimited
0.4
0.5
0.7
-20~+85
-65~+150
550
150
A
°C
°C
mW
°C
„ Electrical Characteristics ( T=+25°C Vcc = 4.0V to 20V )
Characteristic
Low Supply Voltage
Supply Voltage
Output Zener Breakdown
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Falling Time
Switch Time Differential
Symbol
Vce
Vcc
Vz
Vce(sat)
Icex
Icc
tr
tf
∆t
Conditions
Min
Vcc=3.5V, IL=100mA
Typ
Max
0.4
3.5
20
46
0.3
<0.1
16
3.0
0.3
3.0
Vcc=14V, IL=300mA
Vce=14V, Vcc=14V
Vcc=20V, Output Open
Vcc=14V, RL=820Ω, CL=20pF
Vcc=14V, RL=820Ω, CL=20pF
Vcc=14V, RL=820Ω, CL=20pF
0.6
10
25
10
1.5
10
Units
V
V
V
V
µA
mA
µs
µs
µs
„ Test Circuit
14V
277
(276)
DO
RL1
RL2
CL1 CL2
DOB
RL1=RL2=820 Ohm
CL1=CL2=20 pF
Anachip Corp.
www.anachip.com.tw
Rev.B1 Mar 17, 2004
3/7
ATC
ATS276/277
Complementary Output Hall Effect Latch
„ Magnetic Characteristics( Ta=+25°C)
(1mT=10 Gauss)
A grade
Characteristic
Symbol
ATS276
ATS277
ATS276
ATS277
ATS276
ATS277
Operate Point
Release Point
Hysteresis
Min.
10
10
-50
-50
-
Typ.
75
75
Max.
50
50
-10
-10
-
Min.
5
5
-70
-70
-
Typ.
75
75
Max.
70
70
-5
-5
-
Symbol
Min.
Typ.
Max.
Unit
Bop
Brp
Bhy
Unit
Gauss
Gauss
Gauss
B grade
Characteristic
Symbol
ATS276
ATS277
ATS276
ATS277
ATS276
ATS277
Operate Point
Release Point
Hysteresis
Bop
Brp
Bhy
Unit
Gauss
Gauss
Gauss
C grade
Characteristic
Operate Point
ATS276
Bop
-
-
100
Gauss
Release Point
ATS276
Brp
-100
-
-
Gauss
Hysteresis
ATS276
Bhy
-
75
-
Gauss
Vcc
DOB
( Output Voltage )
( Output Voltage )
DO
( off-state )
Bhy
Turn off
Turn on
Turn oFF
Vsat
Vsat
0
Bhy
Turn on
Vcc
( on-state )
( on-state )
Brp
( off-state )
Bop
Brp
( Magnetic flux density B )
0
Bop
( Magnetic flux density B )
Anachip Corp.
www.anachip.com.tw
Rev.B1 Mar 17, 2004
4/7
ATC
ATS276/277
Complementary Output Hall Effect Latch
„ Performance Characteristics (SIP4)
Ta (°C)
25
50
60
70
95
100
105
110
115
120
Pd (mW) 550 440 396 352 308 286 264 242
220
198
176
154
132
Pd (mW)
80
85
90
Power Dissipation Curve
1000
800
600
400
200
0
0
25
50
75
85
100
125
150
Ta (。C)
Typical Magnetic Switch Point VS. Supply Voltage
Flux Density (G)
120
Bhys
80
Bop
40
0
Brp
-40
5
12
20
24
Supply Voltage (V)
Supply Current (mA)
Typical Supply Current versus Supply Voltage
16
14
12
10
8
6
4
2
0
TA=25oC
TA=80oC
TA=-20oC
0
5
10
15
20
25
Supply Voltage (V)
Anachip Corp.
www.anachip.com.tw
Rev.B1 Mar 17, 2004
5/7
ATC
ATS276/277
Complementary Output Hall Effect Latch
„ Operating Characteristics
S
Marking side
( Output Voltage )
DO
N
Vcc
Vd
High
Bhy
Low
Vsat
( SIP4 )
Brp
N
0
Bop
S
( Magnetic flux density )
„ Marking Information
( Top View )
Part Number
27X
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.
www.anachip.com.tw
Rev.B1 Mar 17, 2004
6/7
ATC
ATS276/277
Complementary Output Hall Effect Latch
„ Package Information
Active Area Depth
Package Sensor Location
Marking side
1.75mm
1.35mm
1
0.7mm
2
3
4
Package Dimension
o
5 -7
o
14.25mm
+/-1.25mm
1.55mm
+/-0.1mm
o
o
3 -5
0.46mm +/-0.03mm
27X
5.22mm
+/-0.1mm
4.20mm
+/-0.1mm
o
0.38mm
+/-0.03mm
o
3.65mm
+/-0.1mm
0.30mm
+/-0.1mm
5 -7
o
3 -5
0.38mm
+/-0.03mm
3.81mm
+/-0.03mm
1.03mm
+/-0.1
o
0.2mm Max.
1.42mm+/-0.1mm
Anachip Corp.
www.anachip.com.tw
1.27mm
+/-0.03mm
Rev.B1 Mar 17, 2004
7/7
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