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AH3766Q

AUTOMOTIVE HALL- EFFECT LATCH


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AH3766Q pdf
Description
The AH3766Q is an AEC-Q100 qualified high-voltage, medium-
sensitivity Hall-Effect latch IC designed for brushless DC-motor
commutation, speed measurement, angular or linear encoders and
position sensors in automotive applications. To support wide range of
demanding applications, the design is optimized to operate over the
supply range of 3.0V to 28V. With chopper stabilized architecture and
an internal bandgap regulator to provide temperature compensated
supply for internal circuits, the AH3766Q provides a reliable solution
over the whole operating range. For robustness and protection, the
device has a reverse blocking diode with a Zener clamp on the
supply. The output has an overcurrent limit and a Zener clamp.
AH3766Q
HIGH-VOLTAGE, MEDIUM-SENQSITIVITY
AUTOMOTIVE HALL- EFFECT LATCH
Pin Assignments
(Top View)
GND 2
3 OUTPUT
1 VDD
SOT23
The single, open-drain output can be switched on with South pole of
sufficient strength and switched off with North pole of sufficient
strength. When the magnetic flux density (B) perpendicular to the
package is larger than the operate point (Bop), the output is switched
on (pulled low). The output is held latched until magnetic flux density
reverses and becomes lower than the release point (Brp).
(Top View)
SIP-3
3. OUTPUT
2. GND
1. VDD
Features
Bipolar Latch Operation (South Pole: On, North Pole: off)
High Sensitivity: Bop and Brp of +110G and -110G Typical
Single, Open-Drain Output with Overcurrent Limit
3.0V to 28V Operating Voltage Range
Chopper Stabilized Design Provides
Superior Temperature Stability
Minimal Switch Point Drift
Enhanced Immunity to Stress
Good RF Noise Immunity
Reverse Blocking Diode
Zener Clamp on Supply and Output Pins
-40°C to +150°C Operating Temperature
ESD: HBM 8kV, CDM: >2kV
AEC-Q100 Grade 0 Qualified
Industry Standard SOT23 and SIP-3 Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
Brushless DC-Motor Commutation
Revolution Per Minute (RPM) Measurement
Angular and Linear Encoder and Position Sensing and Indexing
Flow Meters
Contactless Commutation, Speed Measurement and Angular
Position Sensing/Indexing in Automotive Applications
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AH3766Q
Document number: DS38075 Rev. 2 - 2
1 of 13
www.diodes.com
July 2015
© Diodes Incorporated



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AH3766Q pdf
Typical Applications Circuit
3.0V to 28V
VDD
AH3766Q
Q
RL
OUTPUT
CIN AH3766Q
GND
Note:
4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF. RL is the pull-up resistor.
Pin Descriptions
Package: SOT23 and SIP-3
Pin Number
1
2
3
Pin Name
VDD
GND
OUTPUT
Power Supply Input
Ground
Output Pin
Function
Functional Block Diagram
VDD
Power
switch
To All Subcircuits
Amp
Amp
Control
OUTPUT
Current
Limit
GND
AH3766Q
Document number: DS38075 Rev. 2 - 2
2 of 13
www.diodes.com
July 2015
© Diodes Incorporated



Part Number AH3766Q
Description AUTOMOTIVE HALL- EFFECT LATCH
Maker Diodes Incorporated - Diodes Incorporated
Total Page 13 Pages
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