E-MAIL: Features - On-chip Hall sensor with two different sensitivity and hysteresis settings for - 3.5V to 2V operating voltage - 4mA (avg) output sink current - Build-in protecting diode only for chip reverse power connecting - -2 C to 85 C operating temperature - Low profile 4 pin SIP package Applications - Dual-coil Brush-less DC Motor - Dual-coil Brush-less DC Fan - Revolution Counting - Speed Measurement General Description 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 (, B). While the magnetic flux density (B) is larger than operate point (), will turn on (low), and meanwhile B will turn off (high). Each output is latched until B is lower than release point (), and then B 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. Ordering Information ATS27X X -XX X -X Part No. Wafer Body Package Lead Packing Magnetic Characteristics 6 : ATS276 Blank or P: SIP-4L L : Lead Free Blank : Tube or Bulk 276:A or B or C 7 : A~Z : if necessary to specify Blank: Normal A : Tape & Reel 277:A or B Typical Application Circuit 27X coil1 coil2 1 2 3 4 Brush-less DC Fan This datasheet contains new product information. 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, 24 1/7
E-MAIL: Block Diagram 1 REG. VCC 2 Hall Plate Amp B 3 GND 4 Pin Assignment 277 (276) Front View 1 : VCC 2 : 3 : B 1 2 3 4 4 :GND Name P/I/O Pin # Description P 1 Power Supply Input O 2 Output Pin B O 3 Output Pin GND P 4 Ground 2/7
E-MAIL: Absolute Maximum Ratings ( at Ta=25 C ) Characteristics Symbol Values Unit Supply voltage V CC 2 V Reverse V CC Polarity Voltage V RCC -2 V Magnetic flux density B Unlimited Continuous.4 Output on current Hold Ic.5 A Peak (Start Up).7 Operating temperature range Ta -2~+85 C Storage temperature range Ts -65~+15 C Package Power Dissipation PD 55 mw Maximum Junction Temp Tj 15 C Electrical Characteristics ( T=+25 C = 4.V to 2V ) Characteristic Symbol Conditions Min Typ Max Units Low Supply Voltage Vce =3.5V, I L =1mA.4 V Supply Voltage 3.5 2 V Output Zener Breakdown Vz 46 V Output Saturation Voltage Vce(sat) =14V, I L =3mA.3.6 V Output Leakage Current Icex Vce=14V, =14V <.1 1 µa Supply Current Icc =2V, Output Open 16 25 ma Output Rise Time tr =14V, R L =82Ω, C L =2pF 3. 1 µs Output Falling Time tf =14V, R L =82Ω, C L =2pF.3 1.5 µs Switch Time Differential t =14V, R L =82Ω, C L =2pF 3. 1 µs Test Circuit 14V 277 (276) RL1 RL2 RL1=RL2=82 Ohm CL1=CL2=2 pf CL1 CL2 B 3/7
E-MAIL: Magnetic Characteristics( Ta=+25 C) (1mT=1 ) A grade Characteristic Symbol Min. Typ. Max. Unit Operate Point ATS276 1-5 1-5 Release Point ATS276-5 - -1-5 - -1 Hysteresis ATS276-75 - - 75 - B grade Characteristic Symbol Min. Typ. Max. Unit Operate Point ATS276 5-7 5-7 Release Point ATS276-7 - -5-7 - -5 Hysteresis ATS276-75 - - 75 - C grade Characteristic Symbol Min. Typ. Max. Unit Operate Point ATS276 - - 1 Release Point ATS276-1 - - Hysteresis ATS276-75 - B ( Output Voltage ) Turn off ( off-state ) Turn on ( Output Voltage ) Turn on ( off-state ) Turn off ( on-state ) Vsat ( Magnetic flux density B ) ( on-state ) Vsat ( Magnetic flux density B ) 4/7
E-MAIL: Performance Characteristics (SIP4) Ta ( C) 25 5 6 7 8 85 9 95 1 15 11 115 12 Pd (mw) 55 44 396 352 38 286 264 242 22 198 176 154 132 Pd (mw) 1 Power Dissipation Curve 8 6 4 2 25 5 75 85 1 125 15 Ta ( C) Typical Magnetic Switch Point VS. Supply Voltage Flux Density (G) 12 8 4-4 5 12 2 24 Supply Voltage (V) s Typical Supply Current versus Supply Voltage Supply Current (ma) 16 14 12 1 8 6 4 2 TA=8 o C TA=25 o C TA=-2 o C 5 1 15 2 25 Supply Voltage (V) 5/7
E-MAIL: Operating Characteristics S N ( SIP4 ) Marking side ( Output Voltage ) N Vsat High Vd Low S ( Magnetic flux density ) Marking Information Part Number ( Top View ) 27X X XX X X Blank : normal L : Lead Free Package ID Code: A ~ Z Nth week: 1~52 Year: "1" = 21 "2" = 22 ~ 6/7
E-MAIL: Package Information Active Area Depth Marking side Package Sensor Location 1.75mm 1.35mm.7mm 1 2 3 4 Package Dimension 1.55mm +/-.1mm 1.3mm +/-.1 5 o -7 o o 3 o -5 14.25mm +/-1.25mm.38mm +/-.3mm.3mm +/-.1mm 3.65mm +/-.1mm.46mm +/-.3mm.38mm +/-.3mm 5.22mm +/-.1mm 4.2mm +/-.1mm 27X 3.81mm +/-.3mm 5 o -7 o o 3 o -5.2mm Max. 1.42mm+/-.1mm 1.27mm +/-.3mm 7/7