AH374-W-7 Diodes Incorporated

AH374 SINGLE PHASE HALL EFFECT LATCH Description Pin Assignments The AH374 is an integrated Hall-Effect latched sensor designed for (Top View) electronic commutation of brush-less DC motor applications. The 3. OUT device includes an on-chip Hall voltage generator for magnetic GND 2. sensing, a comparator that amplifies the Hall voltage, and a Schmitt 1. V DD trigger to provide switching hysteresis for noise rejection, and open SC59 and SOT23 drain output. An internal band-gap regulator provides a temperature compensated supply voltage for internal circuits and allows a wide operating supply range. (Top View) 3. OUT When the magnetic flux density (B) is larger than operate point (B ), OP 2. GND output is switched on (OUT pin is pulled low). The output state is held on until a magnetic flux density reversal falls below B . When B is RP 1. V DD less than B , the output is switched off. RP SIP-3 (Bulk Pack) The AH374 is available in SIP-3 (Ammo Pack), SIP-3 (Bulk Pack), SC59 and SOT23 packages. Applications Features Brush-Less DC Motor Bipolar Hall Effect Latch Operation Brush-Less DC Fan 2.2V to 20V Operating Range Revolution Counting Open Drain Pre-Driver Speed Measurement 25mA Output Sink Capability -40C to +125C Operating Temperature Industry Standard SIP-3 (Ammo Pack), SIP-3 (Bulk Pack), SC59 and SOT23 Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AH374 Pin Descriptions Packages: SC59, SOT23, SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack) Pin Number Pin Name Function 1 Power Supply Input VDD 2 GND Ground 3 OUT Output Functional Block Diagram V DD 1 Regulator 3 OUT 2 Hall Plate Amp 2 GND 2 of 12 AH374 December 2016 Diodes Incorporated www.diodes.com Document number: DS39163 Rev. 1 - 2 NEW PRO DUCT