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| AH375 Single Phase Hall Effect Latch Features - 2.2V to 20V DC operation voltage - Temperature compensation - Wide operating voltage range - Open drain pre-driver - 25mA maximum sinking output current - Package: SIP3, SOT23 General Description AH375 is an integrated Hall effect latched sensor designed for electronic commutation of brush-less DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a schmitt trigger to provide switching hysteresis for noise rejection, and open drain output. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. If a magnetic flux density larger than threshold Bop, DO is turned on(low). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off (high). Applications - Brush-less DC Motor - Brush-less DC Fan - Revolution counting - Speed measurement Pin Assignments 375 Pin Descriptions Name Vdd GND OUT P/I/O P P O Pin # 1 2 3 Description Positive Power Supply Ground Output Pin 2 (Top view) 375 1 : Vdd 1 3 2 : GND 3 : OUT (SOT23 package) 123 (SIP package) Ordering Information AH375 X - X X X Wafer Body Blank or A~Z : if necessary to specify Package P: SIP3 W: SOT23 Lead L : Lead Free Packing Blank : Bulk A : Tape & Reel 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.1.3 Jan. 09, 2006 1/6 AH375 Single Phase Hall Effect Latch Typical Application Circuit +12V D1 R1 2K U1 1 Vdd OUTPUT GND 2 AH375 3 Q1 NPN L1 L2 R2 3K + C1 0.47uF Q2 NPN + C2 0.47uF Brush-less DC Fan Functional Block Diagrams Vdd 1 Regulator Hall plate 3 2 Amp 2 OUT GND Anachip Corp. www.anachip.com.tw 2/6 Rev.1.3 Jan. 09, 2006 AH375 Single Phase Hall Effect Latch Absolute Maximum Ratings Characteristics Supply Voltage Magnetic Flux Density Output OFF Voltage Output "On" Current Continuous Operating Temperature Range Storage Temperature Range Maximum Junction Temp. SIP-3L Package Power Dissipation SOT23-3L SIP-3L Thermal Resistance SOT23-3L ( at Ta=25oC ) Symbol Vdd B VDS Id Ta Ts Tj Pd jc (Ta=+ 25C, Vdd =12V) Test Conditions -- Iout=20mA VDD =14V Output Open RL=820, CL=20Pf RL=820, CL=20pF Min 2.2 Typ 300 <0.1 2 0.1 0.1 Max 20 700 10 4 1 1 Units V mV uA mA us us Values 20 Unlimited 30 25 -40~+125 -65~+150 150 550 230 227 543 Unit V V mA C C C mW mW C/W Electrical Characteristics Characteristic Supply Voltage Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Falling Time Symbol Vdd Vds(sat) Ioff Idd tr tf Test Circuit 12V OUT RL RL=820 Ohm CL=20 pF CL Test Circuit Magnetic Characteristics Parameter Operate Point Release Point Hysteresis (Ta=25C, Vdd =2.5V to 20V) (1mT=10Gauss) Max. Unit 60 Gauss -5 Gauss Gauss Symbol Bop Brp Bhys Min. 5 -60 - Typ. 30 -30 60 Anachip Corp. www.anachip.com.tw 3/6 Rev.1.3 Jan. 09, 2006 AH375 Single Phase Hall Effect Latch Output S S Marking side ( Output Voltage ) ( off-state ) Vdd Marking side Turn off Bh y Turn on ( on-state ) N ( SOT23 ) N ( SIP3 ) Vsat Brp 0 Vsat Bop ( Magnetic flux density B ) Performance Characteristics (SIP3) Ta (C) Pd (mW) Ta (C) Pd (mW) P d (m W ) 600 500 400 300 200 100 0 0 25 50 75 100 125 150 T a ( C ) 25 550 105 198 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 Performance Characteristics (SOT23-3) Ta (C) Pd (mW) 25 230 50 184 60 166 70 147 80 129 90 110 100 92 110 74 120 55 125 46 130 37 140 18 150 0 P d (m W ) P o w e r D is s ip a tio n C u rv e 300 200 100 0 0 25 50 75 100 125 150 T a ( C ) Anachip Corp. www.anachip.com.tw 4/6 Rev.1.3 Jan. 09, 2006 AH375 Single Phase Hall Effect Latch Marking Information (1) SIP3 (Top View) 375 YWW X ID Code: A~Z: Non-Lead Free a~z : Lead Free Date code Y : Year WW : Nth week (2) SOT23 (Top View) ID code A~Z: Non-Lead Free a~z: Lead Free P3:AH375 Date code Y : Year M : Month(A~L) XX YM X Package Information (1) Package Type: SIP-3L (unit: mm) 0.51mm NOM 2.00mm 1.15mm BRANDED SURFACE 1 2 3 Active Area Depth Package Dimension 45 Sensor Location 0.38mm 0.7mm 1.57mm 1.47mm 0.41mm 0.41mm 3 4.17mm 4.04mm 1.27mm 2 1 1.82 mm 45 3.10mm 2.97mm 15.50mm 13.00mm Anachip Corp. www.anachip.com.tw 5/6 Rev.1.3 Jan. 09, 2006 AH375 Single Phase Hall Effect Latch Package Information (Continued) (2) Package Type: SOT23-3L D ( Sensing point ) E HE 0.8mm GAUGE PLANE L L1 e1 e 1(4x) 1 1.45mm 3 VIEW C C 2 A2 A b(3x) 2(4x) Symbol A A1 A2 b C D E HE L L1 M e e1 1 2 Dimensions In Millimeters Min. 1.05 0.05 1.00 0.25 0.08 2.70 1.50 2.60 0.30 0.50 0.73 1.80 0.85 0o 3o 6o Nom. 1.10 2.90 1.60 2.80 0.60 0.78 1.90 0.95 5o 5o 8o Max. 1.35 0.15 1.20 0.50 0.20 3.00 1.70 3.00 0.60 0.70 0.83 2.00 1.05 10o 7o 10o Min. 0.041 0.002 0.039 0.010 0.003 0.106 0.059 0.102 0.012 0.020 0.029 0.071 0.033 0o 3o 6o A1 SEE VIEW C Dimensions In Inches Nom. 0.043 0.114 0.063 0.110 0.024 0.031 0.075 0.037 5o 5o 8o Max. 0.053 0.006 0.047 0.020 0.008 0.118 0.067 0.118 0.024 0.028 0.033 0.079 0.041 10o 7o 10o Anachip Corp. www.anachip.com.tw 6/6 Rev.1.3 Jan. 09, 2006 M |
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