AH276Q Просмотр технического описания (PDF) - Diodes Incorporated.
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AH276Q Datasheet PDF : 8 Pages
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AH276Q
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
Features
General Description
• On-chip Hall sensor with two different sensitivity and
hysteresis settings for AH276
• Built-in protecting diode only for chip reverse power
connecting
• -20°C to 85°C operating temperature
• Lead Free Package: SIP-4L
• SIP-4L: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)
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
AH 276 Q - P X - B - X
Version
Q
Package
P : SIP-4L
Lead Free
L : Lead Free
G : Green
Packing
B : Bulk
Magnetic
Characteristics
A or B or C (Note 3)
Device
AH276Q-PL-B-A
AH276Q-PL-B-B
AH276Q-PL-B-C
AH276Q-PG-B-A
AH276Q-PG-B-B
AH276Q-PG-B-C
Package
Code
P
P
P
P
P
P
Packaging
(Note 2)
SIP-4L
SIP-4L
SIP-4L
SIP-4L
SIP-4L
SIP-4L
Quantity
1000
1000
1000
1000
1000
1000
Bulk
Part Number Suffix
-B
-B
-B
-B
-B
-B
Magnetic
Characteristics
A
B
C
A
B
C
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
3. Please refer to page 4 (Magnetic Characteristics table).
AH276Q Rev. 5
DS31066
1 of 8
www.diodes.com
NOVEMBER 2009
© Diodes Incorporated
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