AH375 Single Phase Hall Effect Latch Features General Description - 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 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 2 (Top view) 375 1 : Vdd 1 3 (SOT23 package) P/I/O P P O Pin # 1 2 3 Description Positive Power Supply Ground Output Pin 2 : GND 3 : OUT 1 2 3 (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 L1 R1 2K L2 U1 1 Vdd OUTPUT R2 Q1 NPN 3 GND 2 AH375 Q2 NPN 3K + C1 0.47uF + C2 0.47uF Brush-less DC Fan Functional Block Diagrams Vdd 1 Regulator Hall plate 23 OUT 2 GND Amp Anachip Corp. www.anachip.com.tw Rev.1.3 Jan. 09, 2006 2/6 AH375 Single Phase Hall Effect Latch Absolute Maximum Ratings ( at Ta=25oC ) 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 Electrical Characteristics Characteristic Symbol Supply Voltage Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Falling Time Vdd Vds(sat) Ioff Idd tr tf Symbol Vdd B VDS Id Ta Ts Tj Values 20 Unlimited 30 25 -40~+125 -65~+150 150 550 230 227 543 Pd θjc Unit V V mA °C °C °C mW mW °C/W (Ta=+ 25°C, Vdd =12V) Test Conditions — Iout=20mA VDD =14V Output Open RL=820Ω, CL=20Pf RL=820Ω, CL=20pF Min Typ Max Units 2.2 - 300 <0.1 2 0.1 0.1 20 700 10 4 1 1 V mV uA mA us us Test Circuit 12V OUT RL RL=820 Ohm CL=20 pF CL Test Circuit Magnetic Characteristics Parameter Operate Point Release Point Hysteresis (Ta=25°C, Vdd =2.5V to 20V) Symbol Bop Brp Bhys Anachip Corp. www.anachip.com.tw Min. 5 -60 - Typ. 30 -30 60 (1mT=10Gauss) Max. Unit 60 Gauss -5 Gauss Gauss Rev.1.3 Jan. 09, 2006 3/6 AH375 Single Phase Hall Effect Latch S ( Output Voltage ) Output S Marking side Marking side Vdd ( off-state ) B hy Turn off Turn on N N ( SOT23 ) ( on-state ) Vsat ( SIP3 ) Vsat Brp 0 B op ( Magnetic flux density B ) Performance Characteristics (SIP3) 25 550 105 198 Ta (°C) Pd (mW) Ta (°C) Pd (mW) 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 P d (m W ) 600 500 400 300 200 100 0 0 25 50 75 100 125 150 T a (。 C ) Performance Characteristics (SOT23-3) Ta (°C) 25 50 60 70 80 90 100 110 120 125 130 140 150 Pd (mW) 230 184 166 147 129 110 92 74 55 46 37 18 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 Rev.1.3 Jan. 09, 2006 4/6 AH375 Single Phase Hall Effect Latch Marking Information (1) SIP3 (2) SOT23 (Top View) (Top View) ID Code: A~Z: Non-Lead Free a~z : Lead Free 375 YWW X ID code A~Z: Non-Lead Free a~z: Lead Free XX YM X P3:AH375 Date code Y : Year M : Month(A~L) Date code Y : Year WW : Nth week Package Information (unit: mm) (1) Package Type: SIP-3L 0.51mm NOM 2.00mm 1.15mm BRANDED SURFACE 1 2 3 Sensor Location Active Area Depth Package Dimension 45º 0.38mm 0.7mm 1.57mm 1.47mm 0.41mm 0.41mm 3 1.27mm 4.17mm 4.04mm 2 1 45º 3.10mm 2.97mm Anachip Corp. www.anachip.com.tw 1.82 mm 15.50mm 13.00mm Rev.1.3 Jan. 09, 2006 5/6 AH375 Single Phase Hall Effect Latch Package Information (Continued) (2) Package Type: SOT23-3L D C 2 HE E ( Sensing point ) GAUGE PLANE 0.8mm 1 θ L 3 L1 1.45mm e1 VIEW C e b(3x) Symbol A A1 A2 b C D E HE L L1 M e e1 θ θ1 θ2 θ 2(4x) 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 Anachip Corp. www.anachip.com.tw A SEE VIEW C A1 A2 M θ 1(4x) Dimensions In Inches 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 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 Rev.1.3 Jan. 09, 2006 6/6