Single Phase Hall Effect Latch ATS477
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. A5 Apr 15, 2004
1/7
ATC
Features
- On-chip Hall sensor
- Bi-direction H type output drivers for single coil
- Internal bandgap regulator allows temperature
compensated operations and a wide operating
voltage range
- High output sinking capability up to 250mA
- Operating voltage: 3.5V~20V
- Low output switching current noise
- Build-in shunt Zener protection for output driver
- SOP-7L provide FG output pin
- Package: SIP-4L and SOP-7L
Applications
- Single-coil Brush-less DC Fan
- Single-coil Brush-less DC Motor
General Description
ATS477 that integrates Hall sensor with output
drivers is designed for electrical commutation of
brush-less DC motor application. The device
includes on-chip Hall voltage generator for
magnetic sensing, the error amplifier that amplifies
the Hall voltage, a comparator that is to provide
switching hysteresis for noise rejection, the
bi-direction drivers for sinking and driving large
current load, and the frequency generator (FG) that
provides a signal proportional to rotation speed.
Internal bandgap regulator is used to provide
temperature compensated bias for internal circuits
and allows a wide operating supply voltage range.
Built-in protection circuit and output shunt Zener
diodes were applied for protecting output drivers
during operating.
If a magnetic flux density is larger than threshold
Bop, DO is turned to sink and DOB is turned to
drive. The output state is held until a magnetic flux
density reversal falls below Brp causing DO to be
turned to drive and DOB turned to sink.
ATS477 is rated for operation over-temperature
range from -20 oC to 85 oC and voltage range from
3.5V to 20V. The devices are available in low cost
die forms or rugged SIP-4L and power SOP-7L
packages.
Ordering Information
ATS477 X -XX X -X
Packing
Blank : Tube or Bulk
A : Tape & Reel
P: SIP-4L
Package Lead
L : Lead Free
Blank: Normal
Wafer Body Magnetic
Characteristics
Blank or
A~Z : if necessary
to specify
A or B
S: SOP-7L
Application Circuit
Vcc
12 34
coil
coil
1
54
3
26
7
FG
Vcc
(SIP-4L) (SOP 7)
Single-coil brush-less DC Fan
Single Phase Hall Effect Latch ATS477
Anachip Corp.
www.anachip.com.tw Rev. A5 Apr 15, 2004
2/7
ATC
Pin Configuration
(1)SIP-4L
Front View
477
12 43
Name P/I/O Pin # Description
Vcc P 1 Positive Power Supply
DOB O 2 Output Pin
DO O 3 Output Pin
Vss P 4 Ground
(2)SOP-7L
1
54
3
26
7
Top view
477
Name P/I/O Pin # Description
Vcc P 3,4 Positive Power Supply
DO O 7 Output Pin
DOB O 5 Output Pin
FG O 1 Frequency Generator
Vss P 6 Ground
Single Phase Hall Effect Latch ATS477
Anachip Corp.
www.anachip.com.tw Rev. A5 Apr 15, 2004
3/7
ATC
Block Diagrams
(1). SIP-4L
1
REG.
Hall
Sensor
Amp
VSS
2
3
OUTPUT(DOB)
4
CTL
CKT
1
1
OUTPUT(DO)
(2). SOP-7L
3
REG.
Hall
Sensor
Amp
OUTPUT(DO)
CTL
CKT
1FG
5
VSS
7
OUTPUT(DOB)
6
4
4
Single Phase Hall Effect Latch ATS477
Anachip Corp.
www.anachip.com.tw Rev. A5 Apr 15, 2004
4/7
ATC
Absolute Maximum Ratings ( at Ta=25oC )
Characteristics Symbol Values Unit
Supply voltage VCC 20 V
Magnetic flux density B Unlimited
Continuous 250
Hold 300
Output “on” current
Peak (Start Up)
Ic
600
mA
Operating temperature range Ta -20~+85 °C
Storage temperature range Ts -65~+150 °C
SIP-4L 550 mW
Package Power
Dissipation SOP-7L PD 800 mW (Note 1)
(Note 1) Ground pin must connect to large area copper on PCB as possible.
Electrical Characteristics ( Ta=+25°C, Vcc=3.5V to 20V )
Characteristic Symbol Test Conditions Min Typ Max Unit
Supply Voltage Vcc － 3.5 － 20 V
Vce(sink) Vcc=14V, Ic=200mA － 500 800 mV
Output Saturation
Voltage Vce(drive) Vcc=14V, Ic=200mA Vcc-1.5 － Vcc V
FG Saturation Voltage Vce Vcc=14V, IFG=20mA 0.3 0.7 V
Supply Current Icc Vcc=20V, Output Open － 18 30 mA
Output Rise Time tr Vcc=14V, RL=820Ω, CL=20pF － 1.0 5.0 µs
Output Falling Time tf Vcc=14V, RL=820Ω, CL=20pF － 0.3 1.5 µs
Switch Time Differential ∆t Vcc=14V, RL=820Ω, CL=20pF － 1.0 5.0 µs
Magnetic Characteristics (Ta=+25°C)
(1mT=10Gauss)
A grade
Characteristic Symbol Min. Typ. Max. Unit
Operate Point Bop 5 - 70 Gauss
Release Point Brp -70 - -5 Gauss
Hysteresis Bhy - 60 - Gauss
B grade
Characteristic Symbol Min. Typ. Max. Unit
Operate Point Bop - - 100 Gauss
Release Point Brp -100 - - Gauss
Hysteresis Bhy - 60 - Gauss
Single Phase Hall Effect Latch ATS477
Anachip Corp.
www.anachip.com.tw Rev. A5 Apr 15, 2004
5/7
ATC
12
10
8
6
4
2
OFF
OP
RP
ON
Output Voltage in Volts
12
10
8
6
4
2
OP
ON
OFF
RP
Output Voltage in Volts
-200 200100
-100 0-200 200100
-100 0
HYSTERCSIS CHARACTERISTICS
Magnetic Flux Density in Gauss Magnetic Flux Density in Gauss
DOB DO
Vsat Vsat
Operation Characteristics
Marking side
S
B
hy
V
sat
V
cc
( Output Voltage )
V
d
B
rp
B
op
0
( Magnetic flux density )
DO
High
Low
Marking side
S
( SIP4 ) ( SOP-7 )
N
N
Marking Information
477
Part Number
Year:
( Top View )
"2" = 2002
"1" = 2001
X XX X X
Nth week: 01~52
ID Code: A ~ Z
Blank : normal
L : Lead Free Package
~
Single Phase Hall Effect Latch ATS477
Anachip Corp.
www.anachip.com.tw Rev. A5 Apr 15, 2004
6/7
ATC
Package Information
(1) SIP-4L
Active Area Depth Package Sensor Location
Marking side
0.7mm
1.50mm
1.35mm
1234
Package Dimension
14.25mm
+/-1.25mm
1.03mm
+/-0.1
1.55mm
+/-0.1mm
0.38mm
+/-0.03mm
5.22mm
+/-0.1mm
4.20mm
+/-0.1mm
3.65mm
+/-0.1mm
1.42mm+/-0.1mm
1.27mm
+/-0.03mm
0.38mm
+/-0.03mm
0.30mm
+/-0.1mm
3.81mm
+/-0.03mm
477
0.46mm +/-0.03mm
0.2mm Max.
5
o
-7
o
o
3
o
-5
o
3
o
-55
o
-7
o
Single Phase Hall Effect Latch ATS477
Anachip Corp.
www.anachip.com.tw Rev. A5 Apr 15, 2004
7/7
ATC
(2) SOP-7L
A
C
C2
B1
D
e
E
B2
F
β
C3
C1
XY
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 5.79 5.99 6.19 0.228 0.236 0.244
B1 3.83 3.91 3.99 0.151 0.154 0.157
B2 3.78 3.86 3.94 0.149 0.152 0.155
C 4.80 4.87 4.94 0.189 0.192 0.194
C1 1.57 1.67 1.77 0.062 0.066 0.070
C2 0.32 0.40 0.48 0.013 0.016 0.019
C3 1.17 1.27 1.37 0.046 0.050 0.054
D 0.19 0.22 0.25 0.007 0.009 0.010
E 1.04REF 0.041REF
e 0.48 0.68 0.88 0.019 0.027 0.035
F 1.35 1.45 1.55 0.053 0.057 0.061
X - 2.90 - - 0.114 -
Y - 2.00 - - 0.079 -
β
7o 7
o
