AH276 查看數據表（PDF） - Anachip Corporation
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AH276 Datasheet PDF : 6 Pages
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Complementary Output Hall Effect Latch
AH276
Features
- 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
Applications
- Dual-coil Brush-less DC Motor
- Dual-coil Brush-less DC Fan
- Revolution Counting
- Speed Measurement
General Description
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.
Ordering Information
AH276 X - X X X
Wafer Body
K: K version Wafer Body
Q: Q version Wafer Body
Package
P: SIP-4L
Lead
Packing
L : Lead Free Blank : Tube or Bulk
Typical Application Circuit
276
123 4
Vcc
coil1
coil2
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
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