Data Sheet 27609.4A 3175 AND 3177 HALL-EFFECT LATCHES X These Hall-effect latches are temperature-stable and stress-resistant sensors especially suited for electronic commutation in brushless dc motors using multipole ring magnets. Each device includes a voltage regulator, quadratic Hall voltage generator, temperature compensation circuit, signal amplifier, Schmitt trigger, and an open-collector output on a single silicon chip. The on-board regulator permits operation with supply voltages of 4.5 volts to 18 volts. The switch output can sink 10 mA. With suitable output pull up, they can be used directly with bipolar or MOS logic circuits. 2 3 OUTPUT 1 GROUND CC SUPPLY V Dwg. PH-003A Pinning is shown viewed from branded side. The three package styles available provide a magnetically optimized package for most applications. Suffix ‘LT’ is a surface-mount SOT-89/ TO-243AA package; suffixes ‘U’ and ‘UA’ feature wire leads for through-hole mounting. FEATURES ■ Symmetrical Response ■ 4.5 V to 18 V Operation ■ Open-Collector Output ■ Reverse Battery Protection ■ Activate With Small, Commercially Available Permanent Magnets ■ Solid-State Reliability ■ Small Size ■ Superior Temperature Stability ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC . . . . . . . . . . . . . 18 V Reverse Battery Voltage, VRCC . . . . -18 V Magnetic Flux Density, B . . . . Unlimited Output OFF Voltage, VOUT . . . . . . . . 18 V Continuous Output Current, IOUT . 15 mA Operating Temperature Range, TA . . . . . . . . . . . . . . . -20°C to +85°C Storage Temperature Range, TS . . . . . . . . . . . . . . . -65°C to +150°C ■ Resistant to Physical Stress Always order by complete part number, e.g., UGN3175LT . See Magnetic Characteristics table for differences between devices. 3175 AND 3177 HALL-EFFECT LATCHES FUNCTIONAL BLOCK DIAGRAM 1 VCC REG. X 3 OUTPUT 2 GROUND Dwg. FH-005-2 ELECTRICAL CHARACTERISTICS at TA = +25°C, VCC = 4.5 V to 18 V (unless otherwise noted). Limits Characteristic Symbol Supply Voltage VCC Output Saturation Voltage Test Conditions VOUT(SAT) Min. Typ. Max. Units Operating 4.5 — 18 V VCC = 18 V, IOUT = 10 mA, B > BOP — 200 300 mV Output Leakage Current IOFF VOUT = 18 V, B < BRP — 0.05 5.0 µA Supply Current ICC VCC = 4.5 V, B < BRP (Output OFF) — 5.0 10 mA Output Rise Time tr VCC = 12 V, RL = 1.1 kΩ, CL = 20 pF — 0.04 2.0 µs Output Fall Time tf VCC = 12 V, RL = 1.1 kΩ, CL = 20 pF — 0.18 2.0 µs MAGNETIC CHARACTERISTICS in gauss; VCC = 4.5 V to 18 V. TA = +25°C TA = -20°C to +85°C Characteristic Part Number* Min. Typ. Max. Min. Typ. Max. Operate Point, BOP UGN3175 25 — 170 15 — 180 UGN3177 50 — 150 25 — 150 UGN3175 -170 — -25 -180 — -15 UGN3177 -150 — -50 -150 — -25 UGN3175 100 200 — 80 180 — UGN3177 100 200 — 50 180 — Release Point, BRP Hysteresis, Bhys NOTE: As used here, negative flux densities are defined as less than zero (algebraic convention). Complete part number includes a suffix denoting package type (LT, U, or UA). 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1991, 1999, Allegro MicroSystems, Inc. 3175 AND 3177 HALL-EFFECT LATCHES TYPICAL OPERATING CHARACTERISTICS SENSOR LOCATIONS (±0.005” [0.13mm] die placement) Suffix “LT” ACTIVE AREA DEPTH 0.030" 0.76 mm NOM 200 0.090" 2.30 mm 0.045" 1.15 mm A 1 2 3 Dwg. MH-008-1B SWITCH POINT IN GAUSS OPERATE POINT 100 V 0 -100 RELEASE POINT -10 10 30 50 70 90 AMBIENT TEMPERATURE IN °C Dwg. GH-020 ACTIVE AREA DEPTH 0.015" 0.38 mm NOM 0.092" 2.35 mm 0.072" 1.83 mm A BRANDED SURFACE 1 2 3 Dwg. MH-002-3B Suffix “UA” ACTIVE AREA DEPTH 0.018" 0.46 mm NOM 0.083" 2.12 mm 0.055" 1.39 mm A BRANDED SURFACE = 14 V -200 -30 Suffix “U” CC 1 2 3 Dwg. MH-011B 3175 AND 3177 HALL-EFFECT LATCHES PACKAGE DESIGNATOR ‘LT’ Dimensions in Inches (for reference only) 0.173 0.181 0.064 0.072 0.155 0.167 1 2 0.055 0.063 3 0.090 0.102 0.014 0.017 0.084 0.090 0.014 0.019 0.017 0.022 0.035 0.047 0.059 BSC 0.118 BSC Dwg. MA-009-3 in Dimensions in Millimeters (controlling dimensions) 4.40 4.60 1.62 1.83 3.94 4.25 1 2 1.40 1.60 3 2.29 2.60 0.35 0.44 2.13 2.29 0.36 0.48 0.89 1.20 0.44 0.56 1.50 BSC 3.00 BSC Dwg. MA-009-3 mm 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3175 AND 3177 HALL-EFFECT LATCHES PACKAGE DESIGNATOR ‘U’ Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) 4.65 4.52 0.183 0.178 1.60 1.50 0.063 0.059 4.60 4.47 0.181 0.176 45° 45° 0.086 1 2 0.018 3 2.18 1 2 0.46 3 MAX MAX 0.600 0.560 0.015 15.24 14.23 0.38 0.41 0.016 SEE NOTE SEE NOTE 1.27 0.050 2.54 0.100 Dwg. MH-003D in Devices in the ‘U’ package are NOT RECOMMENDED FOR NEW DESIGN NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line). 2. Exact body and lead configuration at vendor’s option within limits shown. 3. Height does not include mold gate flash. 4. Recommended minimum PWB hole diameter to clear transition area is 0.035" (0.89 mm). Dwg. MH-003D mm 3175 AND 3177 HALL-EFFECT LATCHES PACKAGE DESIGNATOR ‘UA’ Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) 4.17 4.04 0.164 0.159 0.062 0.058 45° 1.57 1.47 45° 3.10 2.97 0.122 0.117 45° 45° 0.085 1 2 3 0.031 2.16 1 2 3 0.79 MAX MAX 0.640 0.600 16.26 15.24 0.015 SEE NOTE SEE NOTE 0.016 0.41 1.27 0.050 BSC 0.38 BSC Dwg. MH-014D in Dwg. MH-014D mm NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line). 2. Exact body and lead configuration at vendor’s option within limits shown. 3. Height does not include mold gate flash. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3175 AND 3177 HALL-EFFECT LATCHES HALL-EFFECT SENSORS SELECTION GUIDE Partial Part Number Avail. Oper. Characteristics at TA = +25°C Temp. BOP(max) BRP(min) Bhys(typ) Features HALL-EFFECT UNIPOLAR SWITCHES in order of BOP and Bhys 3240 3210 3361 3362 3161 3141 3235 E/L E E E E E/L S 5140 3142 3143 3144 3122 3123 3121 3150 E E/L E/L E/L E/L E/L E/L J +50 ±70 +120 +120 +160 +160 +175 -25 +200 +230 +340 +350 +400 +440 +450 +40 to +850 +5.0 ±5.0 +50 +50 +30 +10 +25 -175 +50 +75 +165 +50 +140 +180 +125 – 10 7.7 5.0* 5.0* 20 55 15* 15* 55 55 55 55 105 105 105 20 Notes chopper stabilized micropower, chopper stabilized 2-wire, chopper stabilized 2-wire, chopper stabilized 2-wire 1 output 1 output 2 300 mA output 2 2 1, 3 programmable, chopper stabilized 1 † HALL-EFFECT LATCHES & BIPOLAR SWITCHES in order of BOP and Bhys 3260 E/L +30 -30 20 bipolar, chopper stabilized 3280 E/L +40 -40 45 chopper stabilized 3134 E/L +50 -50 27 bipolar switch 3133 K/L/S +75 -75 52 bipolar switch 3281 E/L +90 -90 100 chopper stabilized 3132 K/L/S +95 -95 52 bipolar switch 3187 E/L +150 -150 100* 3177 S +150 -150 200 3625 S +150 -150 200 900 mA outputs 1, 3, 5 3626 S +150 -150 200 400 mA outputs 1, 3, 5 3195 E/L +160 -160 220 1, 4 3197 L +160 -160 230 1 3175 S +170 -170 200 3188 E/L +180 -180 200* 3283 E/L +180 -180 300 chopper stabilized 3189 E/L +230 -230 100* 3275 S +250 -250 100* 5 3185 E/L +270 -270 340* Operating Temperature Ranges: S = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K = -40°C to +125°C, L = -40°C to +150°C Notes 1. Protected. 2. Output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc motor control. 3. Power driver output. 4. Active pull down. 5. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control. *Minimum. †Latches will not switch on removal of magnetic field; bipolar switches may switch on removal of field but require field reversal for reliable operation over operating temperature range. 3175 AND 3177 HALL-EFFECT LATCHES Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the design of its products. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000