AH276Q
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
General Description
Features
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,
•
•
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)
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
Magnetic
Version
Q
Package
P : SIP-4L
Lead Free
Packing
B : Bulk
Characteristics
A or B or C (Note 3)
L : Lead Free
G : Green
Bulk
Package
Code
Packaging
Magnetic
Characteristics
Device
(Note 2)
SIP-4L
SIP-4L
SIP-4L
SIP-4L
SIP-4L
SIP-4L
Quantity
1000
Part Number Suffix
AH276Q-PL-B-A
AH276Q-PL-B-B
AH276Q-PL-B-C
AH276Q-PG-B-A
AH276Q-PG-B-B
AH276Q-PG-B-C
P
P
P
P
P
P
-B
-B
-B
-B
-B
-B
A
B
C
A
B
C
1000
1000
1000
1000
1000
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