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AH3775 Dataheets PDF



Part Number AH3775
Manufacturers Diodes
Logo Diodes
Description HIGH-VOLTAGE MEDIUM-SENSITIVITY HALL EFFECT LATCH
Datasheet AH3775 DatasheetAH3775 Datasheet (PDF)

AH3775 HIGH-VOLTAGE MEDIUM-SENSITIVITY HALL EFFECT LATCH Description The AH3775 is a high-voltage medium-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 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 regu.

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AH3775 HIGH-VOLTAGE MEDIUM-SENSITIVITY HALL EFFECT LATCH Description The AH3775 is a high-voltage medium-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 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 AH3775 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. Pin Assignments (Top View) GND 2 3 OUTPUT 1 VDD SC59 and 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). The magnetic operating and release polarity is opposite for SOT23 and SC59 packages. SOT23 and SIP-3 packages will require south pole to the part marking side to operate while SC59 will require south pole to the non-part marking side. (Top View) SIP-3 3. OUTPUT 2. GND 1. VDD Features • Bipolar Latch Operation (South Pole: On, North Pole: off) • 3.0V to 28V Operating Voltage Range • Medium Sensitivity: BOP and BRP of +70G and -70G Typical • Single, Open-Drain Output with Overcurrent Limit • Chopper Stabilized Design Provides: - Superior Temperature Stability - Minimal Switch Point Drift - Enhanced Immunity to Stress • Good RF Noise Immunity • Reverse Blocking Diode and Zener Clamp on Supply • -40C to +125C Operating Temperature • ESD (HBM): 6kV • Industry Standard SC59, 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 • Flow Meters • Angular and Linear Encoder and Position Sensors • Contactless Commutation, Speed Measurement and Angular Position Sensing/Indexing in Consumer Home Appliances, Office Equipments and Industrial 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. AH3775 Document number: DS37900 Rev. 1 - 2 1 of 14 www.diodes.com September 2015 © Diodes Incorporated Typical Applications Circuit 3.0V to 28V VDD AH3775 RL OUTPUT CIN AH3775 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: SC59, 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 Low-Pass Filter Sample and Hold Dynamic Offset Cancellation Current Limit GND AH3775 Document number: DS37900 Rev. 1 - 2 2 of 14 www.diodes.com September 2015 © Diodes Incorporated AH3775 Absolute Maximum Ratings (Notes 5 & 6) (@TA = +25°C, unless otherwise specified.) Symbol VDD VDDR VOUT_MAX IOUT Supply Voltage (Note 6) Reverse Supply Voltage Output off Voltage (Note 6) Continuous Output Current Characteristic Value 32 -32 32V 60 Unit V V V mA IOUT_R Reverse Output Current -50 mA B Magnetic Flux Density Unlimited PD Package Power Dissipation SIP-3 SC59 and SOT23 550 mW 230 mW Ts Storage Temperature Range -65 to +165 °C TJ Maximum Junction Temperature +150 °C ESD Electrostatic Discharge Withstand Capability - Human Body Model 6 kV Notes: 5. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time. 6. The absolute maximum VDD of 32V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate the device at the absolute maximum rated conditions for any period of time. Recommended Operating Conditions (@TA = -40°C to +125°C, unless otherwise .


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