A1101EUA-T Allegro

AH337 SINGLE PHASE HALL EFFECT SWITCH Description Pin Assignments (Top View) AH337 is an unipolar Hall-Effect sensor for contactless switching applications. The device includes an on-chip Hall 3. OUT voltage generator for magnetic sensing, an amplifier that GND 2. amplifies the Hall voltage, a Schmitt trigger to provide 1. Vdd switching hysteresis for noise rejection, and an open-collector output. The band-gap regulator allows a wide operating SIP-3L voltage range. (Top View) When the magnetic flux density (B) is larger than operate 3. OUT point (Bop), output is switched on (OUT pin is pulled low). GND 2. The output state is held on until a magnetic flux density falls 1. Vdd below Brp. When B is less than Brp, the output is switched SC59 off. The AH337 is available in SIP-3L and SC59 packages. Applications Features VCD/DVD Loader, CD/DVD ROM Cover Detector Speed Measurement Unipolar Hall-Effect sensor Home Appliances 4.2V to 28V DC operating voltage Home Safety 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 AH337 SINGLE PHASE HALL EFFECT SWITCH 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 30 V B Magnetic Flux Density Unlimited V Output OFF Voltage 30 V DS I Output ON Current Continuous 25 mA d T Storage Temperature Range -65~+150 C S T Maximum Junction Temperature 150 C J(MAX) mW SIP-3L 550 P Package Power Dissipation D SC59 230 mW Recommended Operating Conditions Symbol Parameter Conditions Min Max Unit Vdd Supply Voltage (Note 2) Operating 4.2 28 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 4.2V, but the magnetic characteristics won t be normal until the supply is over 4.5V. 2 of 9 July 2010 AH337 Diodes Incorporated www.diodes.com Document number: DS31050 Rev. 9 - 2