ATS278PLAA [ANACHIP]
暂无描述;
| 型号： | ATS278PLAA |
| 厂家： | 
ANACHIP CORP |
| 描述： | 暂无描述 锁存器 |
| 文件： | 总6页 (文件大小：211K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ATS278
Two Phase Hall Effect Latch With FG Output
Features
General Description
- On-chip Hall plate
ATS278 is an integrated Hall sensor with two output
drivers and rotor speed output, typically designed
for electronic commutation of two-phase brush-less
DC fan applications.
- Operating voltage: 3.5V~20V
- Internal bandgap regulator allows temperature
compensated operations and a wide operating
voltage range
On-chip Hall sensor will generate Hall voltage due
to magnetics sensing. The amplifier will amplify the
Hall voltage. The Schmitt trigger determines
switching hysteresis and then control internal
driver’s on/off to sink load current. Meanwhile, An
internal bandgap regulator is used to provide stable
bais due to temperature-compensation. FG pin will
provide switching frequency of driver. Major feature
is to minimize the external components by
building-in FG output transistor.
- High output sinking capability up to 400mA for
driving large load
- Built-in protection diode only for chip reverse
power connecting
- Frequency Generation (FG) output
- Package: SIP-5L
Applications
If a magnetic flux density larger than threshold Bop,
DO is turned on (low) and DOB is turned off (high).
The output state is held until a magnetic flux density
reversal falls below Brp causing DO to be turned off
and DOB turned on.
- Dual-coil Brush-less DC Motor
- Dual-coil Brush-less DC Fan
- Revolution Counting
- Speed Measurement
Ordering Information
ATS278X - X X - X
Magnetic
Wafer Body
Package
Lead
Characteristics
Blank or
P: SIP-5L
L : Lead Free
A or B
A~Z : if necessary
to specify
*Packing: Bulk
Typical Application Circuit
5V/12V
+
C1
278
Rpu
Coil1
Coil2
1
2
3
4
5
Speed
R1 = R2 = 47Ω
μ
F
C1 = C2 = 2.2
R2
C2
R1
C1
The R, C value need to be fine tuned
base on coils design.
5V/12V DC Brush-less Fan with FG output function
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 4, 2005
1/6
ATS278
Two Phase Hall Effect Latch With FG Output
Block Diagram
VCC
2
DO
3
REG.
Comparators
Hall Plane
Amp
4
5
DOB
GND
1
1
FG
Pin Configuration
( Front View )
278
1 : FG
2 : VCC
3 : DO
4 : DOB
5 : GND
1 2 3 4 5
Name
P/I/O
Pin #
Description
FG
VCC
DO
DOB
GND
O
P
O
O
P
1
2
3
4
5
Frequency detection output
Positive power input
Driver Output
Driver Output ( Inverting )
Ground
Anachip Corp.
www.anachip.com.tw
Rev. 1.0 Oct 4, 2005
2/6
ATS278
Two Phase Hall Effect Latch With FG Output
Absolute Maximum Ratings
Characteristics
Symbol
Values
Unit
Supply voltage
Reverse VCC Polarity Voltage
Magnetic flux density
VCC
VRCC
B
20
-20
V
V
Unlimited
Continuous
Hold
0.4
0.5
Output “on” current
Ic
A
Peak (Start Up)
0.7
40
-20~+85
-65~+150
550
Sink current of FG
IFG
Ta
Ts
mA
°C
°C
Operating temperature range
Storage temperature range
Package Power Dissipation
PD
mW
Electrical Characteristics ( Ta=+25°C )
Characteristic
Supply Voltage
Output Saturation Voltage
Output Zener Breakdown
Output Leakage Current
Supply Current
Symbol
Conditions
Min
Typ Max
Unit
VCC
Vce(sat)
Vz*
Icex
Icc
3.5
----
----
20
V
mV
V
µA
mA
Vcc=14V, IL=300mA
300
46
800
Vce=14V, Vcc=14V
Vcc=20V, Output Open
----
----
<0.1
16
10
25
Vcc=14V, RL=820Ω,
Output Rise Time
tr
tf
----
----
3.0
0.3
10
µs
µs
CL=20pF (Test Circuit)
Vcc=14V, RL=820Ω,
Output Falling Time
1.5
CL=20pF (Test Circuit)
Vcc=14V, RL=820Ω,
Switch Time Differential
FG saturation voltage
----
----
3.0
10
µs
∆t
CL=20pF (Test Circuit)
Vcc=14V, IL=20 mA
200
700
mV
VFG
*Note: 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 (on page 1).
R
C
= R = 820Ω
L2
L1
278
= C = 20 pf
L1
L2
1
2
3
4
5
14V
R
R
L1
DO
L2
DOB
C
C
L2
L1
( Test circuit )
Anachip Corp.
www.anachip.com.tw
Rev. 1.0 Oct 4, 2005
3/6
ATS278
Two Phase Hall Effect Latch With FG Output
Magnetic Characteristics( Ta=+25oC)
(1mT=10 Gauss)
A grade
Characteristic
Symbol
Min.
Typ.
Max.
Unit
Operate Point
Release Point
Hysteresis
BOP
BRP
BHYS
10
-60
-
-
-
75
60
-10
-
Gauss
Gauss
Gauss
B grade
Characteristic
Symbol
Min.
Typ.
Max.
Unit
Operate Point
Release Point
Hysteresis
BOP
BRP
BHYS
5
-80
-
-
-
75
80
-5
-
Gauss
Gauss
Gauss
DOB
DO
12
12
RP
OFF
OP
OFF
RP
OP
10
8
10
8
6
6
4
4
2
2
ON
ON
Vsat
200
Vsat
-200
-200
-100
0
100
-100
0
100
200
Magnetic Flux Density in Gauss
Magnetic Flux Density in Gauss
Anachip Corp.
www.anachip.com.tw
Rev. 1.0 Oct 4, 2005
4/6
ATS278
Two Phase Hall Effect Latch With FG Output
Performance Characteristics (SIP5)
25
50
60
70
80
85
286
130
88
90
264
135
66
95
100
220
150
0
Ta (°C)
Pd (mW)
Ta (°C)
550
105
198
440
110
176
396
115
154
352
120
132
308
125
110
242
140
44
Pd (mW)
Pd (mW)
1000
Power Dissipation Curve
800
600
400
200
0
0
25
50
75
100
125
150
85
Ta (。C)
Timing Diagram
Rotatory Locked
Rotatory
Locked
Rotor state
DO
DOB
FG
Marking Information
( Front View )
Wafer Lot ID: L & a~z
is lead-free products
Part Number
278
X XX X x
ID Code: A~Z
Nth week: 01~52
Year: "1" = 2001
"2" = 2002
Anachip Corp.
www.anachip.com.tw
Rev. 1.0 Oct 4, 2005
5/6
ATS278
Two Phase Hall Effect Latch With FG Output
Package Information
Package type: SIP-5L ( unit: mm / [inch] )
5.22 ± 0.1
[0.206 ± 0.003]
2° ~ 3°
2-0.3C
[0.079-0.012C]
2° ~ 5°
1.55 ± 0.1
[0.061± 0.003]
0.73 ± 0.1
4.2 REF
[0.029 ± 0.003]
[0.165 REF]
2° ~ 3°
2° ~ 5°
3.65 ± 0.1
[0.144 ± 0.003]
0.48 ± 0.1
[0.019 ± 0.003]
14.3 ± 0.3
0.41± 0.03
[0.563 ± 0.012]
[0.016 ± 0.001]
0.38 ± 0.03
[0.015 ± 0.001]
0.95 ± 0.03
[0.037 ± 0.001]
Location of Sensing Point
2.006 mm
[0.079 inch]
( Top View)
1.016 mm
[0.04 inch]
1
2
3
4
5
Anachip Corp.
www.anachip.com.tw
Rev. 1.0 Oct 4, 2005
6/6
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