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AH276Q Datasheet

COMPLEMENTARY OUTPUT HALL EFFECT LATCH

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AH276Q pdf
AH276Q
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
Features
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 Finish/RoHS Compliant for Lead Free
products (Note 1)
Lead Free Package: SIP-4L
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 DODOB 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
AH276 X - X X X- X
Version
Q
Package Lead Free
P: SIP-4L L : Lead Free
Packing
-B : Bulk
Magnetic
Characteristics
A: A grade (Note 3)
B: B grade (Note 3)
C: C grade (Note 3)
Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
AH276Q-P
Lead-free
Package Packaging
Tube/Bulk
Code
(Note 2) Quantity Part Number Suffix
P
SIP-4
1000
-B
Note: 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. 1
1 of 6
www.diodes.com
JANUARY 2007
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AH276Q Datasheet

COMPLEMENTARY OUTPUT HALL EFFECT LATCH

No Preview Available !

AH276Q pdf
AH276Q
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
Typical Application Circuit
276
12V 1 2 3 4
1uF/25V
Brush-less DC Fan
Block Diagram
1 Vcc
REG.
H all P late
Amp
DO
2
DOB
3
GND
4
Pin Assignment
276
12 3 4
Front View
1 : Vcc
2 : DO
3 : DOB
4 :GND
Name
Vcc
DO
DOB
GND
P/I/O Pin #
P1
O2
O3
P4
Description
Power Supply Input
Output Pin
Output Pin
Ground
AH276Q Rev. 1
2 of 6
www.diodes.com
JANUARY 2007
© Diodes Incorporated


Part Number AH276Q
Description COMPLEMENTARY OUTPUT HALL EFFECT LATCH
Maker Diodes Incorporated
Total Page 6 Pages
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