AH276Q_09

AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Features • • • • • • On-chip Hall sensor with two different sensitivity and hysteresis settings for AH276 Built-in protecting diode only for chip reverse power connecting -20°C to 85°C operating temperature Lead Free Package: SIP-4L SIP-4L: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 1) General Description AH276 are integrated Hall sensors with output drivers, mainly designed for electronic commutation of brush-less DC Fan. This IC internally includes the regulator, protecting diode, Hall plate, amplifier, comparator, and a pair of complementary open-collector outputs (DO, DOB). While the magnetic flux density (B) is larger than operate point (Bop), 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 DO, DOB transfer each state. For DC fan application, sometimes need to test power reverse 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. Applications • • • • Dual-coil Brush-less DC Motor Dual-coil Brush-less DC Fan Revolution Counting Speed Measurement Ordering Information AH 276 Q - P X - B - X Version Q Package P : SIP-4L Lead Free L : Lead Free G : Green Packing B : Bulk Magnetic Characteristics A or B or C (Note 3) Device AH276Q-PL-B-A AH276Q-PL-B-B AH276Q-PL-B-C AH276Q-PG-B-A AH276Q-PG-B-B AH276Q-PG-B-C Notes: Package Code P P P P P P Packaging (Note 2) SIP-4L SIP-4L SIP-4L SIP-4L SIP-4L SIP-4L Quantity 1000 1000 1000 1000 1000 1000 Bulk Part Number Suffix -B -B -B -B -B -B Magnetic Characteristics A B C A B C 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. 3. Please refer to page 4 (Magnetic Characteristics table). AH276Q Rev. 5 DS31066 1 of 8 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Pin Assignment ( Top View ) 276 1 : Vcc 2 : DO 3 : DOB 4 : GND 12 3 4 Pin Descriptions Pin Name Vcc DO DOB GND P/I/O Pin # P O O P 1 2 3 4 Description Power Supply Input Output Pin Output Pin Ground Block Diagram 1 V cc DO 2 REG. H a ll P la te Amp DOB 3 GND 4 AH276Q Rev. 5 DS31066 2 of 8 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Typical Application Circuit 276 12V 1uF/25V 1 2 3 4 Brush-less DC Fan Absolute Maximum Ratings Symbol VCC VRCC B Io Ts PD TJ Characteristics Supply Voltage Reverse VCC Polarity Voltage Magnetic Flux Density (@ TA=25°C) Rating 20 -20 Unlimited Continuous 0.4 0.5 0.7 -65~+150 550 150 227 Unit V V Output “on” current (Note 4) Hold Peak (Start Up) A °C mW °C °C/W Storage Temperature Range Package Power Dissipation (SIP-4L) Maximum Junction Temperature Thermal Resistance (SIP-4L) θ JC Notes: 4. PD shall be within Safety Operation Area. TA TJ Tc θ JA θ JC AH276Q Rev. 5 DS31066 3 of 8 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Recommended Operating Conditions Symbol VCC TA Notes: Characteristic Supply Voltage (Note 5) Operating Ambient Temperature Conditions Operating Operating Min 3.5 -20 Max 20 85 Unit V °C 5. The output DO/DOB is switching as magnetic field change (S>300G, N