AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH General Description Features • 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). 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) • • • • • 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 Package Lead Free Packing Q P : SIP-4L L : Lead Free G : Green B : Bulk 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 Magnetic Characteristics A or B or C (Note 3) 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 1 2 3 4 Pin Descriptions Pin Name P/I/O Pin # Description Vcc P 1 Power Supply Input DO O 2 Output Pin DOB O 3 Output Pin GND P 4 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 1 12V 2 3 4 1uF/25V Brush-less DC Fan Absolute Maximum Ratings Symbol VCC VRCC B Io (@ TA=25°C) Characteristics Supply Voltage Reverse VCC Polarity Voltage Magnetic Flux Density Output “on” current (Note 4) Rating 20 -20 Unlimited Continuous 0.4 Hold 0.5 Peak (Start Up) 0.7 Ts PD TJ Storage Temperature Range Package Power Dissipation (SIP-4L) Maximum Junction Temperature θ JC Thermal Resistance (SIP-4L) Notes: Unit V V A -65~+150 550 150 °C mW °C 227 °C/W 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 Symbol Vz Vce(sat) Icex Icc Max Unit 3.5 -20 20 85 V °C (TA=+25°C) Characteristic Output Zener Breakdown Output Saturation Voltage Output Leakage Current Supply Current Conditions (Note 6) Vcc=14V, IL=400mA Vce=14V, Vcc=14V Vcc=20V, Output Open Min 7 Typ. 35 0.6 <0.1 16 Max 0.9 10 25 Unit V V µA mA 6. Vz is a typical value for design reference. Vz will vary with different coils design. AH276Q Rev. 5 DS31066 Operating Operating Min 5. The output DO/DOB is switching as magnetic field change (S>300G, N<-300G). Electrical Characteristics Notes: Conditions 4 of 8 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Magnetic Characteristics A grade Symbol Bop Brp Bhy B grade Symbol Bop Brp Bhy C grade Symbol Bop Brp Bhy Notes: (TA=+25°C, VCC=14V, Note 7) Characteristic Min Typ. Max Unit Operate Point Release Point Hysteresis 10 -50 - 75 50 -10 - Gauss Gauss Gauss Characteristic Min Typ. Max Unit Operate Point Release Point Hysteresis 5 -70 - 75 70 -5 - Gauss Gauss Gauss Characteristic Min Typ. Max Unit Operate Point Release Point Hysteresis -100 - 75 100 - Gauss Gauss Gauss 7. Magnetic characteristics are for design information, which will vary with supply voltage, operating temperature and after soldering. Vcc DOB ( Output Voltage ) ( Output Voltage ) DO ( off-state ) Bhy Turn off Turn on 0 Bop S N ( Magnetic flux density B ) AH276Q Rev. 5 DS31066 Turn oFF Vsat Vsat Brp Bhy Turn on Vcc ( on-state ) ( on-state ) N ( off-state ) 5 of 8 www.diodes.com Brp 0 Bop S ( Magnetic flux density B ) NOVEMBER 2009 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Performance Characteristics 25 550 105 198 TA (°C) PD (mW) TA (°C) PD (mW) 50 440 110 176 60 396 115 154 70 352 120 132 80 308 125 110 85 286 130 88 90 264 135 66 95 242 140 44 100 220 150 0 P ow er Dis s ipa tion Cu rve P D (m W ) 6 00 5 00 4 00 3 00 2 00 1 00 0 0 25 50 75 8 5 1 00 12 5 150 T A (° C ) Marking Information ( Top View ) Part Number 276Q Y WW X Y : Year : 0~9 WW : Week : 01~52, "52" represents 52 and 53 week X : Internal Code : a~z : Lead Free A~Z : Green SIP-4L AH276Q Rev. 5 DS31066 6 of 8 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Package Information (All Dimensions in mm) (1) Package type: SIP-4L Marking side 1.95士0.1mm 1.1士0.1mm 1 0.7 mm 2 3 4 Sensor Location Active Area Depth Package Dimension AH276Q Rev. 5 DS31066 7 of 8 www.diodes.com NOVEMBER 2009 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 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