Features - On-chip Hall sensor with two different sensitivity and hysteresis settings for - 3.5V to 18V operating voltage - 35mA (avg) output sink current - Built-in protecting diode only for chip reverse power connecting - -4 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 coilside. If necessary, add one external diode to block the reverse current from coil-side. Ordering Information DTS27X X -X X X -X Part No. Wafer Body Package Packing 6 : DTS276 Blank or P: SIP-4L L : Lead Free Blank : Tube or Bulk 276:A or B or C 7 : A~Z : if necessary Blank: Normal A : Tape & Reel 277:A or B to specify Typical Application Circuit Lead Magnetic Characteristics 27X coil1 coil2 1 2 3 4 R1 = R2 = 47Ω C1 = C2 = 2.2 μ F The R, C value need to be fine tuned base on coils design. R1 C1 R2 C2 Brush-less DC Fan 1/7
Block Diagram VDD Regulator Thermal Protection Chopper Amplifier Chopper Schmitt Trigger Driver B GND 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
Absolute Maximum Ratings ( at Ta=25 C ) Symbol Parameter Value Unit VDD Supply Voltage 18 V VDDR Reversed Supply Voltage -18 V B Magnetic Flux Density Un-limited Continuous.35 Io Output Current Hold.5 A Peak.7 Ta Ambient Temp -4~85 C Ts Storage Temp -65~15 C PD Power Dissipation 55 mw TJ Maximum Junction Temp 15 C RJC Thermal Resistance 227 C/W Electrical Characteristics ( T=+25 C = 4.V to 2V ) Symbol Parameter Condition Min. Typ. Max. Unit VDD Supply voltage 3.5 18 V Vz Output protect voltage - 31.5 - V Idd Operating Current VDD=18V, B open - 1.5 3 ma Test Circuit Output saturation voltage VDD=3.5V, Io=1mA -.2 - V Io=35mA -.5.8 V Ioff Output Leakage current VDD=18V, Vo=18V -.1 1 ua Tr Output rise time RL=82Ohm, CL=2pF - 3 1 us Tf Output fall time RL=82Ohm, CL=2pF -.3 1 us T Switch time differential RL=82Ohm, CL=2pF - 3 1 us TSD Thermal protect temp - 165 - C TREL Thermal release temp - 135 - C TSD Thermal protection window - 3 - C 14V 277 (276) RL1 RL2 RL1=RL2=82 Ohm CL1=CL2=2 pf CL1 CL2 B 3/7
Magnetic Characteristics( Ta=+25 C) (1mT=1 ) A grade Characteristic Symbol Min. Typ. Max. Unit Operate Point DTS276 1-5 1-5 Release Point DTS276-5 - -1-5 - -1 Hysteresis DTS276-75 - - 75 - B grade Characteristic Symbol Min. Typ. Max. Unit Operate Point DTS276 5-7 5-7 Release Point DTS276-7 - -5-7 - -5 Hysteresis DTS276-75 - - 75 - C grade Characteristic Symbol Min. Typ. Max. Unit Operate Point DTS276 - - 1 Release Point DTS276-1 - - Hysteresis DTS276-75 - B ( Output Voltage ) Turn off ( off-state ) Turn on ( Output Voltage ) Turn on ( off-state ) Turn off ( on-state ) ( Magnetic flux density B ) ( on-state ) ( Magnetic flux density B ) 4/7
Performance Characteristics (SIP4) Ta ( C) 25 5 6 7 8 85 9 95 1 Pd (mw) 55 44 396 352 38 286 264 242 22 Ta ( C) 15 11 115 12 125 13 135 14 15 Pd (mw) 198 176 154 132 11 88 66 44 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
Operating Characteristics S N ( SIP4 ) Marking side ( Output Voltage ) N 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
Package Information Active Area Depth Marking side Package Sensor Location 1.75mm 1.35mm.7mm 1 2 3 4 Package Dimension 1.55mm 1.3mm +/-.1 5 o -7 o o 3 o -5 14.25mm +/-1.25mm.38mm +/-.3mm.3mm 3.65mm.46mm +/-.3mm.41mm +/-.3mm 5.22mm 4.2mm 27X 3.81mm +/-.3mm 5 o -7 o o 3 o -5.2mm Max. 1.42mm 1.27mm +/-.3mm 7/7