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ATS276D-PA-A Datasheet(PDF) 1 Page - Anachip Corp

Part # ATS276D-PA-A
Description  Complementary Output Hall Effect Latch
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Manufacturer  ANACHIP [Anachip Corp]
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Complementary Output Hall Effect Latch
ATS276/277
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
Features
- 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
Applications
- Dual-coil Brush-less DC Motor
- Dual-coil Brush-less DC Fan
- Revolution Counting
- Speed Measurement
General Description
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.
Ordering Information
ATS27X X -X X 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
276:A or B or C
Part No.
6 : ATS276
7 : ATS277
277:A or B
Typical Application Circuit
12
4
3
27X
coil1
coil2
Vcc
Brush-less DC Fan


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