AH375-PG-B Diodes Incorporated

AH375 SINGLE PHASE HALL EFFECT LATCH Description Pin Assignments AH375 is an integrated Hall-Effect latched sensor designed (Top View) for electronic commutation of brush-less DC motor 3. OUT applications. The device includes an on-chip Hall voltage 2. GND generator for magnetic sensing, a comparator that amplifies Vdd 1. the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open drain output. An SIP-3L 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 GND 2. point (Bop), output is switched on (OUT pin is pulled low). 1. Vdd The output state is held on until a magnetic flux density SC59 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. Applications Features Brush-Less DC Motor Brush-Less DC Fan Bipolar Hall-Effect latch sensor Revolution Counting 2.2V to 20V DC Operating voltage Speed Measurement Temperature compensation Open drain pre-driver 25mA maximum output sink current Operating temperature: -40C to +125C SIP-3L and SC59 packages (SC59 is commonly known as SOT23 in Asia) Green Molding Compound (No Br, Sb) (Note 1) Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at AH375 SINGLE PHASE HALL EFFECT LATCH Pin Descriptions Pin Name P/I/O Pin Description Vdd P 1 Positive Power Supply GND P 2 Ground OUT O 3 Output Pin Functional Block Diagram V dd 1 Regulator 3 OUT 2 Hall plate Amp 2 GND Absolute Maximum Ratings (T = 25 C) A Symbol Characteristics Values Unit Vdd Supply Voltage 20 V B Magnetic Flux Density Unlimited V Output OFF Voltage 30 V DS Id Output On Current Continuous 25 mA T Storage Temperature Range -65~+150 C S T Maximum Junction Temperature 150 C J(MAX) SIP-3L 550 P Package Power Dissipation mW D SC59 230 SIP-3L 227 Thermal Resistance C/W JC SC59 543 Recommended Operating Conditions Symbol Parameter Conditions Min Max Unit Vdd Supply Voltage (Note 2) Operating 2.2 20 V T Operating Ambient Temperature Operating -40 125 C A Notes: 2. The output of IC will be switched after the supply voltage is over 2.2V, but the magnetic characteristics won t be normal until the supply is over 2.5V. 2 of 9 July 2010 AH375 Diodes Incorporated www.diodes.com Document number: DS31172 Rev. 6 - 2