AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH General Description 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 Finish/RoHS Compliant for Lead Free products (Note 1) Lead Free Package: SIP-4L • • • • 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 AH276 X - X X X - X Note: 1. Version Package Lead Free Packing Q P: SIP-4L L : Lead Free -B : Bulk 2. 3. A: A grade (Note 3) B: B grade (Note 3) C: C grade (Note 3) RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Lead-free Note: Magnetic Characteristics Device Package Code Packaging (Note 2) Quantity AH276Q-P P SIP-4 1000 Tube/Bulk Part Number Suffix -B 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. Please refer to page 4 (Magnetic Characteristics table). AH276Q Rev. 1 1 of 6 www.diodes.com JANUARY 2007 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Typical Application Circuit 276 1 12V 2 3 4 1uF/25V Brush-less DC Fan Block Diagram 1 V cc DO 2 REG. H a ll P la te DOB Amp 3 GND 4 Pin Assignment Front View 276 1 : Vcc 3 AH276Q Rev. 1 4 P/I/O Pin # Description Vcc P 1 Power Supply Input DO O 2 Output Pin 3 : DOB DOB O 3 Output Pin 4 :GND GND P 4 Ground 2 : DO 1 2 Name 2 of 6 www.diodes.com JANUARY 2007 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Absolute Maximum Ratings ( @ TA=25°C ) Characteristics Supply voltage Reverse VCC Polarity Voltage Magnetic flux density Continuous Output “on” current* Hold Peak (Start Up) Operating temperature range Storage temperature range Package Power Dissipation (SIP-4) Maximum Junction Temp Symbol VCC VRCC B 4. Unit V V Unlimited TA Ts PD Tj 0.4 0.5 0.7 -20~+85 -65~+150 550 150 °C °C mW °C θ jc 227 °C/W Io Thermal Resistance (SIP-4) *Note: Rating 20 -20 A Pd shall be within Safety Operation Area. Ta Tj Tc θja θjc Electrical Characteristics (TA=+25°C) Characteristic Symbol Supply Voltage Output Zener Breakdown Output Saturation Voltage Output Leakage Current Supply Current Vcc Vz Vce(sat) Icex Icc Note: Conditions (Note 5) (Note 6) Vcc=14V, IL=400mA Vce=14V, Vcc=14V Vcc=20V, Output Open Min Typ Max Units 3.5 7 35 0.6 <0.1 16 20 0.9 10 25 V V V µA mA 5. The output DO/DOB is switching as magnetic field change (S>300G, N<-300G). 6. Vz is a typical value for design reference. Vz will vary with different coils design. AH276Q Rev. 1 3 of 6 www.diodes.com JANUARY 2007 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Magnetic Characteristics (TA=+25°C, VCC=14V, Note 7) A grade Characteristic Operate Point Release Point Hysteresis B grade Characteristic Operate Point Release Point Hysteresis C grade Characteristic Operate Point Release Point Hysteresis Note: 7. Symbol Bop Brp Bhy Min. 10 -50 - Typ. 75 Max. 50 -10 - Unit Gauss Gauss Gauss Symbol Bop Brp Bhy Min. 5 -70 - Typ. 75 Max. 70 -5 - Unit Gauss Gauss Gauss Symbol Bop Brp Bhy Min. -100 - Typ. 75 Max. 100 - Unit Gauss Gauss Gauss 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. 1 Turn oFF Vsat Vsat Brp Bhy Turn on Vcc ( on-state ) ( on-state ) N ( off-state ) 4 of 6 www.diodes.com Brp 0 Bop S ( Magnetic flux density B ) JANUARY 2007 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Performance Characteristics (SIP-4L) 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 o w e r D is s ip a tio n C u rv e P D (m W ) 600 500 400 300 200 100 0 0 25 50 75 85 100 125 150 T A (。 C ) Marking Information ( Front View ) Part Number 276 Y WW X x AH276Q Rev. 1 Internal code a~z : Lead Free Y :Year: "1" = 2001 "2" = 2002 WW : Nth week : 01~52 X : Version : Q 5 of 6 www.diodes.com JANUARY 2007 © Diodes Incorporated AH276Q COMPLEMENTARY OUTPUT HALL EFFECT LATCH Sensor Location ( unit: mm ) Active Area Depth Package Sensor Location Marking side 1.95 ± 0.1mm 1.1 ± 0.1mm 1 0.7mm 2 3 4 276 Package Information ( unit: mm ) IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated. AH276Q Rev. 1 6 of 6 www.diodes.com JANUARY 2007 © Diodes Incorporated