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AH375 Datasheet

SINGLE PHASE HALL EFFECT LATCH

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AH375 pdf
AH375
SINGLE PHASE HALL EFFECT LATCH
Description
Pin Assignments
AH375 is an integrated Hall-Effect latched sensor designed
for electronic commutation of brush-less DC motor
applications. The device includes an on-chip Hall voltage
generator for magnetic sensing, a comparator that amplifies
the Hall voltage, and a Schmitt trigger to provide switching
hysteresis for noise rejection, and open drain output. An
internal band-gap regulator provides a temperature
compensated supply voltage for internal circuits and allows a
wide operating supply range.
When the magnetic flux density (B) is larger than operate
point (Bop), output is switched on (OUT pin is pulled low).
The output state is held on until a magnetic flux density
reversal falls below Brp. When B is less than Brp, the output
is switched off.
(Top View)
SIP-3L
3. OUT
2. GND
1. Vdd
(Top View)
GND 2.
SC59
3. OUT
1. Vdd
The AH375 is available in SIP-3L and SC59 packages.
Features
• Bipolar Hall-Effect latch sensor
• 2.2V to 20V DC Operating voltage
• Temperature compensation
• Open drain pre-driver
• 25mA maximum output sink current
• Operating temperature: -40°C to +125°C
• SIP-3L and SC59 packages
(SC59 is commonly known as SOT23 in Asia)
• Green Molding Compound (No Br, Sb) (Note 1)
Applications
• Brush-Less DC Motor
• Brush-Less DC Fan
• Revolution Counting
• Speed Measurement
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.
Typical Application Circuit
Vdd
AH375
Document number: DS31172 Rev. 6 - 2
RL
C1
AH375 3
2
Output
GND
1 of 9
www.diodes.com
July 2010
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AH375 Datasheet

SINGLE PHASE HALL EFFECT LATCH

No Preview Available !

AH375 pdf
AH375
SINGLE PHASE HALL EFFECT LATCH
Pin Descriptions
Pin Name
Vdd
GND
OUT
P/I/O
P
P
O
Pin #
1
2
3
Description
Positive Power Supply
Ground
Output Pin
Functional Block Diagram
Vdd
1
Regulator
Hall
plate
Amp
23 OUT
2 GND
Absolute Maximum Ratings (TA = 25°C)
Symbol
Vdd
B
VDS
Id
TS
TJ(MAX)
PD
Characteristics
Supply Voltage
Magnetic Flux Density
Output OFF Voltage
Output “On” Current
Storage Temperature Range
Maximum Junction Temperature
Package Power Dissipation
θJC Thermal Resistance
Continuous
SIP-3L
SC59
SIP-3L
SC59
Recommended Operating Conditions
Values
20
Unlimited
30
25
-65~+150
150
550
230
227
543
Unit
V
V
mA
°C
°C
mW
°C/W
Symbol
Parameter
Conditions
Min
Max
Unit
Vdd Supply Voltage (Note 2)
TA Operating Ambient Temperature
Operating
Operating
2.2
-40
20 V
125 °C
Notes: 2. The output of IC will be switched after the supply voltage is over 2.2V, but the magnetic characteristics won't be normal until the
supply is over 2.5V.
AH375
Document number: DS31172 Rev. 6 - 2
2 of 9
www.diodes.com
July 2010
© Diodes Incorporated


Part Number AH375
Description SINGLE PHASE HALL EFFECT LATCH
Maker Diodes Incorporated
Total Page 9 Pages
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