3275 ALLEGRO
Document overview
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Technical content
Type UGN3275K latching Hall-effect sensors are bipolar inte- grated circuits designed for electronic commutation of brushless dc motors. They feature dual complementary outputs. The latches are typically used to sense matched magnetic flux densities of alternating polarity from multipole ring magnets. Each sensor IC includes a Hall voltage generator, operational amplifier, Schmitt trigger, voltage regulator, and dual bipolar output transistors. The regulator allows use of the integrated circuit with supply voltages of 4.5 V to 24 V. If the Hall cell is exposed to a magnetic flux density greater than the operate threshold (B OP ), OUTPUT goes low (turns on) and OUTPUT goes high (turns off). The outputs will hold (latch) this state until magnetic field reversal exposes the Hall cell to a magnetic flux density below the release threshold (B RP ) when OUTPUT will go high (off) and OUTPUT will go low (on). This state is also latched. Under any condition one output is on while the other is off. Because the operating state switches only with magnetic field reversal, and not merely with a change in the strength, these integrated circuits qualify as true Hall-effect latches. These complementary-output Hall-effect latches are supplied in a four-pin plastic SIP, 0.200" (5.08 mm) wide, 0.130" (3.3 mm) high, and 0.060" (1.54 mm) thick.
FEATURES
I Operable with Multipole Ring Magnets I High Reliability I Small Size I Output Compatible with All Digital Logic Families I 4.5 V to 24 V Operation I High Hysteresis Level Minimizes Stray-Field Problems I Complementary Outputs Always order by complete part number:UGN3275K . Dwg. PH-002 SUPPLY V CC GROUND 32OUTPUT OUTPUT X Pinning is shown viewed from branded side. ABSOLUTE MAXIMUM RATINGS Operating Temperature Range, Storage Temperature Range, COMPLEMENTARY-OUTPUT HALL-EFFECT LATCH 3275 Data Sheet 27632.2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000 SENSOR LOCATION FUNCTIONAL BLOCK DIAGRAM Dwg. FH-002 GROUND VCC X OUTPUT3
2 OUTPUT
REG. A 1 432 Dw g. MH-001-2A 0.015" 0.38 mm NOM 0.047" 1.21 mm BRANDED SURFACE ACTIVE AREA DEPTH 0.096" 2.44 mm Copyright © 1991, 2000 Allegro MicroSystems, Inc. Characteristic Symbol Test Conditions Min. Typ. Max. Units Supply Voltage V CC Operating 4.5 — 24 V Output Saturation Voltage VOUT(SAT) VCC = 4.5 V, IOUT = 20 mA, B > BOP — — 400 mV Output Leakage Current I OFF VOUT = 24 V, VCC = 24 V, B < BRP ——1 0 µA Supply Current l CC VCC = 24 V, B < BRP — — 7.0 mA Output Rise Time t r VCC = 12 V, RL = 820 Ω , CL = 20 pF — 0.04 0.4 µs Output Fall Time t f VCC = 12 V, RL = 820 Ω , CL = 20 pF — 0.18 0.4 µs ELECTRICAL CHARACTERISTICS at TA = +25°C, VCC = 4.5 V to 24 V (unless otherwise noted). MAGNETIC CHARACTERISTICS TA = +25°CT A = -20°C to +85°C Characteristic Symbol Min. Max. Min. Max. Units Operate Point B OP 25 250 15 250 G Release Point B RP -250 -25 -250 -15 G Hysteresis B hys 100 — 100 — G NOTE: As used here, negative flux densities are defined as less than zero (algebraic convention).
(controlling dimensions) Dimensions in Millimeters (for reference only) 45° Dwg. MH-009D in 0.063 0.059 0.033 0.0173 0.0138 0.0189 0.0142 0.050 BSC 1234 45° SEE NOTE 0.208 0.203 0.138 0.133 0.600 0.560 0.085 MAX 45° Dwg. MH-009D mm 1.60 1.50 0.84 0.44 0.35 0.48 0.36 1.27 BSC 1234 45° SEE NOTE 5.28 5.16 3.51 3.38 15.24 14.23 2.16 MAX 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). 5. Where no tolerance is specified, dimension is nominal. The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. 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 performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in life-support appliances, devices, or systems without express written approval. 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 that may result from its use.
Worcester, Massachusetts 01615-0036 (508) 853-5000 HALL-EFFECT SENSORS Partial Part Avail. Oper. Characteristics at T A = +25°C Number Temp. B OP(max) BRP(min) Bhys(typ) Features Notes HALL-EFFECT UNIPOLAR SWITCHES in order of BOP and Bhys 3240 E/L +50 +5.0 10 chopper stabilized 1 3210 E ±60 ±5.0 7.7 micropower, chopper stabilized 3361 E +55* +110‡ 5.0* 2-wire, chopper stabilized 3362 E +110 +55 5.0* 2-wire, chopper stabilized
3161 E +160 +30 20 2-wire
3141 E/L +160 +10 55
3235 S +175 +25 15* output 1 2
-25 -175 15* output 2 2
5140 E +200 +50 55 300 mA output 1, 3
3142 E/L +230 +75 55
3143 E/L +340 +165 55
3144 E/L +350 +50 55
3122 E/L +400 +140 105
3123 E/L +440 +180 105
3121 E/L +450 +125 105
3150 J +40 to +850 – 20 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
3281E/L +90 -90 1 00 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: 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. ‡ Maximum † 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.