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AH3712

更新时间： 2023-12-06 20:03:17
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美台 - DIODES /
页数 文件大小 规格书
16页 1105K
描述
27V Open-Drain Hall Effect Latch

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AH3712 数据手册

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AH3712  
HIGH-VOLTAGE, HIGH-SENSITIVITY HALL EFFECT LATCH  
Description  
Pin Assignments  
The AH3712 is a high-voltage, high-sensitivity, Hall-effect latch IC  
designed for commutation of brushless DC motors, flow meters, linear  
encoders, and position sensors in industrial and consumer home  
appliances and personal care applications. To support a wide range  
of demanding applications, the design is optimized to operate over a  
3.0V to 27V supply range. With chopper-stabilized architecture and  
an internal bandgap regulator to provide temperature-compensated  
supply for internal circuits, the AH3712 provides a reliable solution  
over the whole operating range. The output also has an overcurrent  
limit.  
(Top View)  
3 OUTPUT  
GND 2  
1 VDD  
SC59 and SOT23 (Type S)  
(Top View)  
The single open-drain output can be switched on with a South pole of  
sufficient strength and switched off with a 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 and latched until magnetic-flux  
density reverses and becomes lower than the release point (BRP).  
3. OUTPUT  
2. GND  
VDD  
1.  
SIP-3  
Applications  
Features  
Brushless DC motor commutation  
Revolutions per minute (RPM) measurements  
Flow meters  
Bipolar Latch  
.
.
AH3712/AH3712A: South Pole On, North Pole Off  
AH3712B: South Pole Off, North Pole On  
Angular and linear encoders and position sensors  
3.0V to 27V Operating Voltage Range  
Load Dump Voltage Up to 40V  
Contactless commutation, speed measurements, and angular  
position sensing/indexing in consumer home appliances, office  
equipment, and industrial applications  
High Sensitivity: BOP and BRP of ±25G Typical  
Resistant to Physical Stress  
Single Open-Drain (AH3712, AH3712B) or  
Internal Pull-Up Resistor (AH3712A)  
Output Polarity:  
.
.
Direct: AH3712, AH3712A  
Inverted: AH3712B (*Future product)  
Output with Overcurrent Limit  
Chopper-Stabilized Design Provides  
.
.
.
Superior Temperature Stability  
Minimal Switch-Point Drift  
Enhanced Immunity to Stress  
Good RF Noise Immunity  
-40C to +125°C Operating Temperature  
ESD HBM: 8kV, CDM: 1kV  
Industry-Standard SC59, SOT23 (Type S), and SIP-3 Packages  
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  
Halogen and Antimony Free. “Green” Device (Note 3)  
An automotive-compliant part is available under separate  
datasheet (AH3712Q)  
Notes:  
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.  
2. See https://www.diodes.com/quality/lead-free/ 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.  
1 of 16  
www.diodes.com  
April 2023  
AH3712  
© 2023 Copyright Diodes Incorporated. All Rights Reserved.  
Document number: DS44464 Rev. 3 - 2  
1234567...16

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