Diodes AH375 User Manual
Ah375, Single phase hall effect latch, Description
AH375
SINGLE PHASE HALL EFFECT LATCH
AH375
Document number: DS31172 Rev. 6 - 2
1 of 9
July 2010
© Diodes Incorporated
Description
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.
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)
Pin Assignments
(Top View)
1. Vdd
2. GND
3. OUT
SIP-3L
1. Vdd
GND 2.
3. OUT
(Top View)
SC59
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
Typical Application Circuit
AH375
Output
GND
L
R
C
2
3
1
Vdd