ATS276 COMPLEMENTARY OUTPUT HALL EFFECT LATCH General Description Features • • • • • • • • • On-Chip Hall Sensor with Two Different Sensitivity and Hysteresis Settings for ATS276 3.5V to 20V Operating Voltage 400mA (avg.) Output Sink Current Built-in Protecting Diode Only for Chip Reverse Power Connecting -20°C to 85°C Operating Temperature Low Profile 4 Pin SIP Package Lead Free package: SIP-4L SIP-4L: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 1) ATS276 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 ATS276 X - P X - B - X Version Package Lead Free Packing G or H P : SIP-4L L : Lead Free G : Green B : Bulk Device Lead-free Lead-free Lead-free Lead-free Lead-free ATS276G-PL-B-A S276G-PL-B-B ATS276G-PL-B-C ATS276H-PL-B-A ATS276H-PL-B-B ATS276H-PG-B-A TS276H-PG-B-B Notes: Package Code P P P P P P P Packaging (Note 2) SIP-4L SIP-4L SIP-4L SIP-4L SIP-4L SIP-4L SIP-4L Quantity 1000 1000 1000 1000 1000 1000 1000 Bulk Part Number Suffix -B -B -B -B -B -B -B Magnetic Characteristics A or B or C (Note 3) Magnetic Characteristics A B C A B A B 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes. 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 5 (Magnetic Characteristics table). ATS276 Rev. 1 1 of 9 www.diodes.com DECEMBER 2008 © Diodes Incorporated ATS276 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Pin Assignments ( Top View ) 276 1 2 3 4 SIP-4L Pin Descriptions 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 VCC DO 2 REG. Hall Plate Amp DOB 3 GND 4 ATS276 Rev. 1 2 of 9 www.diodes.com DECEMBER 2008 © Diodes Incorporated ATS276 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Typical Application Circuit 276 1 2 3 Coil 1 Coil 2 R1 R2 C1 C2 4 V cc R1 = R2 = 47O C1 = C2 = 2.2 uF The R , C value need to be fine tuned based on coils design. Brush-Less DC Fan Absolute Maximum Ratings Symbol VCC VRCC B Ic TS PD TJ (TA = 25°C) Characteristics Values Supply Voltage Reverse VCC Polarity Voltage Magnetic Flux Density 20 -20 Unlimited 0.4 0.5 0.7 -65~+150 550 150 Continuous Hold Peak (Start Up) Output “on” Current Unit Storage Temperature Range S R PackageTPower Dissipation P k P Di i i Maximum Junction Temperature M i J i T V V A °C mW °C Recommended Operating Conditions Symbol Characteristic VCC Supply Voltage (Note 4) Operating Ambient Temperature (Note 5) TA Notes: Min Max Unit Operating Conditions 3.5 20 V Operating -20 85 °C 4. The output DO/DOB is switching as magnetic field change (S>300G, N<-300G). 5. Shall not exceed PD and Safety Operation Area. ATS276 Rev. 1 3 of 9 www.diodes.com DECEMBER 2008 © Diodes Incorporated ATS276 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Electrical Characteristics Symbol Characteristic Vce Vz Low Supply Voltage Output Zener Breakdown Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Falling Time Switch Time Differential Vce(SAT) Icex Icc tr tf Δt Notes: (TA = +25°C, Vcc = 4.0V to 20V) Conditions Min Typ. 0.4 46 0.3 <0.1 16 3.0 0.3 3.0 Vcc = 3.5V, IL = 100mA (Note 6) Vcc = 14V, IL = 300mA Vce = 14V, Vcc = 14V Vcc = 20V, Output Open Vcc = 14V, RL = 820Ω, CL = 20pF Vcc = 14V, RL = 820Ω, CL = 20pF Vcc = 14V, RL = 820Ω, CL = 20pF Max Units 0.6 10 25 10 1.5 10 V V V µA mA µs µs µs 6. The Vz may vary with the inductance/resistance of DC Fan. In order to reduce the risk of dynamic operation, the capacitor/ resistor is recommended to add below the DO/DOB as Application Circuit (see General Description on page 1). Test Circuit 14 V 276 DO RL 1 DOB RL 2 CL 1 CL 2 RL 1 = RL 2 = 820 Ohm CL 1 = CL 2 = 20 pF ATS276 Rev. 1 4 of 9 www.diodes.com DECEMBER 2008 © Diodes Incorporated ATS276 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Magnetic Characteristics (TA = +25°C, Vcc = 14V) ( 1mT = 10 Gauss ) A grade Symbol Characteristic Min Typ. Max Unit Bop Operation Point 10 - 50 Gauss Brp Release Point -50 - -10 Gauss Bhy Hysteresis - 75 - Gauss Min Typ. Max Unit 5 - 70 Gauss -70 - -5 Gauss - 75 - Gauss Min Typ. Max Unit - - 100 Gauss -100 - - Gauss - 75 - Gauss B grade Symbol Characteristic Bop Operation Point Brp Release Point Bhy Hysteresis C grade Symbol Characteristic Bop Operation Point Brp Release Point Bhy Hysteresis Vcc DOB ( off-state ) Bhy Turn off Turn on ( Output Voltage ) ( Output Voltage ) DO ( on-state ) VSAT Brp 0 Bop Bhy Turn on 5 of 9 www.diodes.com Vcc Turn oFF ( on-state ) VSAT Brp ( Magnetic Flux Density B ) ATS276 Rev. 1 ( off-state ) 0 Bop ( Magnetic Flux Density B ) DECEMBER 2008 © Diodes Incorporated ATS276 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Operating Characteristics S Marking side ( Output Voltage ) DO N ( SIP-4L ) Vcc Vd High Bhy Low Vsat N Brp 0 Bop S ( Magnetic Flux Density ) ATS276 Rev. 1 6 of 9 www.diodes.com DECEMBER 2008 © Diodes Incorporated ATS276 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Performance Characteristics 25 550 105 198 TA (°C) PD (mW) TA (°C) PD (mW) 50 440 110 176 PD (mW) 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 Power Dissipation Curve 1000 800 600 400 200 0 0 25 50 75 85 100 125 150 TA (°C) Flux Density (G) Typical Magnetic Switch Point vs. Supply Voltage 120 Bhys 80 Bop 40 0 Brp -40 5 12 20 24 Supply Voltage (V) T y p ic a l S u p p ly C u r r e n t v s . S u p p ly V o lta g e 16 T A = 2 5 oC T A = 8 0 oC Supply Current (mA) 14 12 10 T A = -2 0 oC 8 6 4 2 0 0 5 10 15 20 25 S u p p ly V o lt a g e ( V ) ATS276 Rev. 1 7 of 9 www.diodes.com DECEMBER 2008 © Diodes Incorporated ATS276 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Marking Information ( Top View ) Part Number 276X Y WW X X : Version : G or H Y : Year : 0~9 WW : Week : 01~52, "52" represents 52 and 53 week X : Internal Code : A~Z : Green a~z : Lead Free SIP-4L Package Information (All Dimensions in mm) Active Area Depth Package Sensor Location Marking side 1.95士0.1mm 1.1士0.1mm 1 0.7mm 2 3 4 Package Dimension ATS276 Rev. 1 8 of 9 www.diodes.com DECEMBER 2008 © Diodes Incorporated ATS276 COMPLEMENTARY OUTPUT HALL EFFECT LATCH 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. ATS276 Rev. 1 9 of 9 www.diodes.com DECEMBER 2008 © Diodes Incorporated