ATC ATS276/277 Complementary Output Hall Effect Latch Features General Description - On-chip Hall sensor with two different sensitivity and hysteresis settings for ATS276/277 - 3.5V to 20V operating voltage - 400mA (avg) output sink current - Build-in protecting diode only for chip reverse power connecting - -20°C to 85°C operating temperature - Low profile 4 pin SIP package ATS276/277 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 ATS27X X - X X X - X Part No. Wafer Body Package Lead Packing Magnetic Characteristics 6 : ATS276 7 : ATS277 Blank or A~Z : if necessary to specify P: SIP-4L L : Lead Free Blank: Normal Blank : Tube or Bulk A : Tape & Reel 276:A or B or C 277:A or B Typical Application Circuit 27X 1 2 3 coil1 coil2 4 Vcc Brush-less DC Fan This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev.B1 Mar 17, 2004 1/7 ATC ATS276/277 Complementary Output Hall Effect Latch Block Diagram 1 VCC DO 2 REG. Hall Plate DOB Amp 3 GND 4 Pin Assignment Front View 277 (276) 1 : VCC 2 : DO 3 : DOB 1 2 3 4 :GND 4 Name P/I/O Pin # Vcc DO DOB GND P O O P 1 2 3 4 Description Power Supply Input Output Pin Output Pin Ground Anachip Corp. www.anachip.com.tw Rev.B1 Mar 17, 2004 2/7 ATC ATS276/277 Complementary Output Hall Effect Latch Absolute Maximum Ratings ( at 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 Maximum Junction Temp Symbol Values Unit VCC VRCC B 20 -20 V V Ic Ta Ts PD Tj Unlimited 0.4 0.5 0.7 -20~+85 -65~+150 550 150 A °C °C mW °C Electrical Characteristics ( T=+25°C Vcc = 4.0V to 20V ) Characteristic Low Supply Voltage Supply Voltage Output Zener Breakdown Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Falling Time Switch Time Differential Symbol Vce Vcc Vz Vce(sat) Icex Icc tr tf ∆t Conditions Min Vcc=3.5V, IL=100mA Typ Max 0.4 3.5 20 46 0.3 <0.1 16 3.0 0.3 3.0 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 0.6 10 25 10 1.5 10 Units V V V V µA mA µs µs µs Test Circuit 14V 277 (276) DO RL1 RL2 CL1 CL2 DOB RL1=RL2=820 Ohm CL1=CL2=20 pF Anachip Corp. www.anachip.com.tw Rev.B1 Mar 17, 2004 3/7 ATC ATS276/277 Complementary Output Hall Effect Latch Magnetic Characteristics( Ta=+25°C) (1mT=10 Gauss) A grade Characteristic Symbol ATS276 ATS277 ATS276 ATS277 ATS276 ATS277 Operate Point Release Point Hysteresis Min. 10 10 -50 -50 - Typ. 75 75 Max. 50 50 -10 -10 - Min. 5 5 -70 -70 - Typ. 75 75 Max. 70 70 -5 -5 - Symbol Min. Typ. Max. Unit Bop Brp Bhy Unit Gauss Gauss Gauss B grade Characteristic Symbol ATS276 ATS277 ATS276 ATS277 ATS276 ATS277 Operate Point Release Point Hysteresis Bop Brp Bhy Unit Gauss Gauss Gauss C grade Characteristic Operate Point ATS276 Bop - - 100 Gauss Release Point ATS276 Brp -100 - - Gauss Hysteresis ATS276 Bhy - 75 - Gauss Vcc DOB ( Output Voltage ) ( Output Voltage ) DO ( off-state ) Bhy Turn off Turn on Turn oFF Vsat Vsat 0 Bhy Turn on Vcc ( on-state ) ( on-state ) Brp ( off-state ) Bop Brp ( Magnetic flux density B ) 0 Bop ( Magnetic flux density B ) Anachip Corp. www.anachip.com.tw Rev.B1 Mar 17, 2004 4/7 ATC ATS276/277 Complementary Output Hall Effect Latch Performance Characteristics (SIP4) Ta (°C) 25 50 60 70 95 100 105 110 115 120 Pd (mW) 550 440 396 352 308 286 264 242 220 198 176 154 132 Pd (mW) 80 85 90 Power Dissipation Curve 1000 800 600 400 200 0 0 25 50 75 85 100 125 150 Ta (。C) Typical Magnetic Switch Point VS. Supply Voltage Flux Density (G) 120 Bhys 80 Bop 40 0 Brp -40 5 12 20 24 Supply Voltage (V) Supply Current (mA) Typical Supply Current versus Supply Voltage 16 14 12 10 8 6 4 2 0 TA=25oC TA=80oC TA=-20oC 0 5 10 15 20 25 Supply Voltage (V) Anachip Corp. www.anachip.com.tw Rev.B1 Mar 17, 2004 5/7 ATC ATS276/277 Complementary Output Hall Effect Latch Operating Characteristics S Marking side ( Output Voltage ) DO N Vcc Vd High Bhy Low Vsat ( SIP4 ) Brp N 0 Bop S ( Magnetic flux density ) Marking Information ( Top View ) Part Number 27X X XX X X Blank : normal L : Lead Free Package ~ ID Code: A ~ Z Nth week: 01~52 Year: "1" = 2001 "2" = 2002 Anachip Corp. www.anachip.com.tw Rev.B1 Mar 17, 2004 6/7 ATC ATS276/277 Complementary Output Hall Effect Latch Package Information Active Area Depth Package Sensor Location Marking side 1.75mm 1.35mm 1 0.7mm 2 3 4 Package Dimension o 5 -7 o 14.25mm +/-1.25mm 1.55mm +/-0.1mm o o 3 -5 0.46mm +/-0.03mm 27X 5.22mm +/-0.1mm 4.20mm +/-0.1mm o 0.38mm +/-0.03mm o 3.65mm +/-0.1mm 0.30mm +/-0.1mm 5 -7 o 3 -5 0.38mm +/-0.03mm 3.81mm +/-0.03mm 1.03mm +/-0.1 o 0.2mm Max. 1.42mm+/-0.1mm Anachip Corp. www.anachip.com.tw 1.27mm +/-0.03mm Rev.B1 Mar 17, 2004 7/7