Anachip AH276K-PL Complementary putput hall effent latch Datasheet

AH276
Complementary Output Hall Effect Latch
„ Features
„ General Description
- On-chip Hall sensor with two different sensitivity
and hysteresis settings for AH276
- 400mA (avg) output sink current
- Built-in protecting diode only for chip reverse
power connecting
- -20°C to 85°C operating temperature
- Low profile 4 pin SIP package
AH276 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
AH276 X - X X X
Wafer Body
Package
Lead
K: K version Wafer Body
Q: Q version Wafer Body
P: SIP-4L
L : Lead Free
Packing
Blank : Tube or Bulk
„ Typical Application Circuit
276
1
2
coil1
3
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.1.0 Jul 21, 2005
1/6
AH276
Complementary Output Hall Effect Latch
„ Block Diagram
1
VCC
DO
2
REG.
Hall Plate
DOB
Amp
3
GND
4
„ Pin Assignment
Front View
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.1.0 Jul 21, 2005
2/6
AH276
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
VCC
VRCC
B
Ic
Ta
Ts
PD
Tj
Values
20
-20
Unlimited
0.4
0.5
0.7
-20~+85
-65~+150
550
150
Unit
V
V
A
°C
°C
mW
°C
„ Electrical Characteristics (T=+25°C)
Characteristic
Low Supply Voltage
Symbol
Vce
Supply Voltage
Vcc
Output Zener Breakdown
Vz
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Falling Time
Switch Time Differential
Vce(sat)
Icex
Icc
tr
tf
∆t
Conditions
Vcc=3.5V, IL=100mA
K version
Q version
K version
Q version
Vcc=14V, IL=400mA
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
Min
3.5
2.5*
-
Typ
0.4
46
35
0.7
<0.1
16
3.0
0.3
3.0
Max
20
20
0.9
10
25
10
1.5
10
Units
V
V
V
V
µA
mA
µs
µs
µs
*The output of DO/DOB will be switched on/off after supply voltage reaching the 2.5V.
„ Test Circuit
14V
276
DO
RL1
RL2
CL1 CL2
DOB
RL1=RL2=820 Ohm
CL1=CL2=20 pF
Anachip Corp.
www.anachip.com.tw
Rev.1.0 Jul 21, 2005
3/6
AH276
Complementary Output Hall Effect Latch
„ Magnetic Characteristics (Ta=+25°C, VCC=12V)
K version
Characteristic
Operate Point
Release Point
Hysteresis
Q version
Characteristic
Operate Point
Release Point
Hysteresis
Symbol
Bop
Brp
Bhy
Min.
-110
-
Typ.
110
Symbol
Bop
Brp
Bhy
Min.
5
-70
-
Typ.
-
Vcc
( off-state )
Bhy
Turn off
Turn on
0
Bop
( off-state )
Bhy
Turn on
Vcc
Turn oFF
Vsat
Vsat
Brp
Unit
Gauss
Gauss
Gauss
( on-state )
( on-state )
N
Max.
70
-5
-
DOB
( Output Voltage )
( Output Voltage )
DO
(1mT = 10 Gauss)
Max.
Unit
110
Gauss
Gauss
Gauss
S
Brp
N
( Magnetic flux density B )
Bop
0
S
( Magnetic flux density B )
„ Performance Characteristics (SIP-4)
25
550
105
198
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
50
440
110
176
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
P o w e r D is s ip a tio n C u rve
P d (m W )
600
500
400
300
200
100
0
0
25
50
75 85
100
125
150
T a (。 C )
Anachip Corp.
www.anachip.com.tw
Rev.1.0 Jul 21, 2005
4/6
AH276
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
276
X XX X X
Wafer Lot ID: a~z
~
K: AH276K-PL
Q: AH276Q-PL
Nth week: 01~52
Year: "1" = 2001
"2" = 2002
Anachip Corp.
www.anachip.com.tw
Rev.1.0 Jul 21, 2005
5/6
AH276
Complementary Output Hall Effect Latch
„ Package Information
Active Area Depth
Package Sensor Location
Marking side
1.95mm
+ 0.1mm
1.75mm
1.1mm
+ 0.1mm
1.35mm
1
0.7mm
2
3
1
4
K version
2
3
4
Q version
Package Dimension
o
5 -7
o
14.25mm
+/-1.25mm
1.55mm
+/-0.1mm
o
o
3 -5
0.46mm +/-0.03mm
276
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
0.41mm
+/-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.1.0 Jul 21, 2005
6/6
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