ATS177-PG-A-B Diodes Incorporated

ATS177 SINGLE OUTPUT HALL EFFECT LATCH Description Pin Assignments ATS177 is an integrated Hall-Effect latch sensor designed for (Top View) electronic commutation of brush-less DC motor applications. 3. The device includes an on-chip Hall voltage generator for DO magnetic sensing, a comparator that amplifies the Hall 2. GND voltage, and a schmitt trigger to provide switching hysteresis Vcc 1. for noise rejection, and open-collector output. An internal bandgap regulator provides a temperature compensated SIP-3L supply voltage for internal circuits and allows a wide operating supply range. Applications When the magnetic flux density (B) is larger than operate point (Bop), output is switched on (DO pin is pulled low). The Brush-less DC Motor output state is held on until a magnetic flux density reversal Brush-less DC Fan falls below Brp. When B is less than Brp, the output is Revolution counting switched off. Speed measurement The ATS177 is available in SIP-3L package. Features Bipolar Hall-Effect latch sensor 3.5V to 20V DC operating voltage Temperature compensation Open-collector pre-driver 25mA maximum output sink current Built-in reverse polarity protection Operating temperature: -40 C to +125C SIP-3L package 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 ATS177 SINGLE OUTPUT HALL EFFECT LATCH Pin Descriptions Pin name P/I/O Pin Description Vcc P 1 Positive power supply GND P 2 Ground DO O 3 Digital output Functional Block Diagram Vcc 1 Regulator Hall 3 DO 2 plate Amp 2 GND Absolute Maximum Ratings (T = 25 C) A Symbol Characteristics Rating Unit V Supply Voltage 20 V CC V Reverse V Polarity Voltage -20 V RCC CC B Magnetic Flux Density Unlimited V Output OFF Voltage 30 V CE P Package Power Dissipation SIP-3L 550 mW D I Output ON Current Continuous 25 mA C T Maximum Junction Temperature 150 C J(MAX) T Storage Temperature Range -65~+150 C S Recommended Operating Conditions Symbol Characteristic Conditions Min Max Unit V Supply Voltage Operating 3.5 20 V CC Operating Ambient Temperature T Operating -20 85 C A (Note 2) Notes: 2. Shall not exceed P and Safety Operation Area. D 2 of 9 July 2010 ATS177 Diodes Incorporated www.diodes.com Document number: DS31055 Rev. 6 - 2