Green AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Description Pin Assignments AH276 are integrated Hall sensors with output drivers, mainly designed for electronic commutation of brush-less DC Fan. This IC ( Top View ) internally includes the regulator, protecting diode, Hall plate, amplifier, comparator, and a pair of complementary open-collector outputs (DO, 276 DOB). 1 : Vcc While the magnetic flux density (B) is larger than operate point (Bop), 2 : DO DO will turn on (low), and meanwhile DOB will turn off (high). Each output is latched until B is lower than release point (Brp), and then 3 : DOB DO, DOB transfer each state. 4 : GND For DC fan application, sometimes need to test power reverse 12 3 4 connection condition. Internal diode only protects chip-side but not for coil-side. If necessary, add one external diode to block the reverse current from coil-side. Features Applications On-chip Hall sensor with two different sensitivity and hysteresis Dual-coil Brush-less DC Motor settings for AH276 Dual-coil Brush-less DC Fan Built-in protecting diode only for chip reverse power connecting Revolution Counting -20C to +85C operating temperature Speed Measurement Lead Free Package: SIP-4L SIP-4L: Available in Green Molding Compound (No Br, Sb) Lead-Free Finish RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied. 2. See AH276Q Pin Descriptions Pin Name P/I/O Pin Function P 1 Power Supply Input V CC DO O 2 Output Pin DOB O 3 Output Pin GND P 4 Ground Functional Block Diagram 1 Vcc DO 2 REG. Hall Plate DOB Amp 3 GND 4 Absolute Maximum Ratings ( T = +25C, unless otherwise specified.) A Symbol Parameter Rating Unit Supply Voltage 20 V V CC Reverse VCC Polarity Voltage -20 V V RCC B Magnetic Flux Density Unlimited Continuous 0.4 Output on Current Io Hold 0.5 A (Note 3) Peak (Start Up) 0.7 Ts Storage Temperature Range -65 ~ +150 C PD Package Power Dissipation (SIP-4L) 550 mW T Maximum Junction Temperature +150 C J Thermal Resistance Junction-to-Ambient (SIP-4L) 227 C/W JA Thermal Resistance Junction-to-Case (SIP-4L) 49 C/W JC Note: 3. P shall be within Safety Operation Area. D T A T J Tc JA JC 2 of 6 September 2013 AH276Q Diodes Incorporated www.diodes.com Document number: DS31066 Rev. 6 - 2