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MA276 Datasheet(PDF) 1 Page - Major-Power Technology Co., LTD.

Part # MA276
Description  Complementary Output Hall Effect Fan Driver
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Manufacturer  MPOWER [Major-Power Technology Co., LTD.]
Direct Link  http://major-power.com.tw/
Logo MPOWER - Major-Power Technology Co., LTD.

MA276 Datasheet(HTML) 1 Page - Major-Power Technology Co., LTD.

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MA276
Major Power Technology Co., Ltd.
Rev.1
Aug.05, 2013
mplementary Output Hall Effect Fan Driver
GENERAL DESCRIPTION
MA276 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-Drain 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.
FEATURES
- On-chip Hall effect sensor with two different sensitivity and hysteresis settings
- Built-in protecting diode only for chip reverse power connecting
- -40°C to 85°C operating temperature
- Low Profile SIP-4L Package( Green and Lead Free )
BLOCK DIAGRAM


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