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5275 COMPLEMENTARY OUTPUT POWERHALL(R) LATCH
5275
COMPLEMENTARY OUTPUT POWER HALL(R) LATCH
Type UGN5275K latching Hall-effect sensors are bipolar integrated circuits designed for electronic commutation of brushless dc motors. They feature open-collector complementary power outputs that are capable of sinking up to 300 mA continuously. Increased current ratings, complementary outputs, and sensitive switching points that are stable over temperature and time ideally suit these devices for minimum-component brushless dc motor designs. Each sensor IC includes a Hall-voltage generator, an operational amplifier, a Schmitt trigger, a voltage regulator, and large-area dual npn-output transistors. The regulator allows the IC to operate with supply voltages ranging from 4.5 V to 14 V. On-chip compensation circuitry stabilizes switch point performance over temperature. The large bipolar junction output transistors are fed by a unique driver stage, which minimizes power dissipation within the IC. The magnetic operation of this device is similar to that of the UGN3275K complementary-output Hall-effect latch. Output Q of the IC switches to the LOW state when the internal Hall generator experiences a magnetic field that exceeds the rated operate point. Output Q switches HIGH within one s of the Output Q change of state. When the device is exposed to a sufficient magnetic field of opposite polarity, Output Q returns to the HIGH state, and Output Q returns to the LOW state. The UGN5275K is rated for operation over a temperature range of -20C to +85C, and is supplied in an environmentally rugged, four-pin miniature plastic SIP. Consult the factory for alternate packaging and custom magnetic requirements.
Data Sheet 27632A
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
at TA = +25C
Supply Voltage, VCC . . . . . . . . . . . . . . . 14 V Magnetic Flux Density, B . . . . . . Unlimited Output OFF Voltage, VCE . . . . . . . . . . . 60 V Output ON Current, IC Continuous . . . . . . . . . . . . . . . . . 0.5 A Peak (Start Up) . . . . . . . . . . . . . . 0.9 A Operating Temperature Range, TA . . . . . . . . . . . . . . . . . -20C to +85C Storage Temperature Range, TS . . . . . . . . . . . . . . . . -65C to +150C Package Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . 750 mW
T C UY DL ON RO PE DC EN UE IN ER TF NE OR CR IS O DF --
V
CC
1
X
2
3
4
Dwg. PH-002
GROUND
OUTPUT
SUPPLY
OUTPUT
FEATURES
s s s s s
High Sink-Current Capability Magnetic Sensing, Complementary-Output Latch On-Chip Schmitt Trigger Provides Hysteresis Temperature-Compensated Switch Points Rugged, Low-Profile SIP
Always order by complete part number: UGN5275K .
5275 COMPLEMENTARY OUTPUT POWERHALL(R) LATCH
ELECTRICAL CHARACTERISTICS at TA = +25C, VCC = 4.5 V to 14 V (unless otherwise noted).
Characteristic Supply Voltage Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Fall Time Switch Time Differential Symbol VCC VCE(SAT) ICEX lCC tr tf t VCC = 14 V, IC = 300 mA VCE = 14 V, VCC = 14 V VCC = 14 V, Output Open VCC = 14 V, R L = 45 , C L = 20 pF VCC = 14 V, R L = 45 ,CL = 20 pF VCC = 14 V, RL = 45 , CL = 20 pF Test Conditions Min. 4.5 -- -- -- -- -- -- Typ. -- 400 -- 18 0.3 0.3 1.0 Max. 14 600 10 30 1.5 1.5 3.0 Units V mV A mA s s s
MAGNETIC CHARACTERISTICS
TA = +25C Characteristic Operate Point Release Point Hysteresis Symbol BOP BRP Bhys Min. 25 -250 100 Max. 250 -25 -- TA = -20C to +85C Min. 15 -250 100 Max. 250 -15 -- Units G G G
NOTE: As used here, negative flux densities are defined as less than zero (algebraic convention).
TEST CIRCUIT
FUNCTIONAL BLOCK DIAGRAM
1 VCC 2
OUTPUT
REG.
X
3
OUTPUT GROUND
4
Dwg. FH-002
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1988, 1995, Allegro MicroSystems, Inc.
5275 COMPLEMENTARY OUTPUT POWERHALL(R) LATCH
MOTOR COIL DRIVER
FIGURE 2
SWITCH POINTS VERSUS TEMPERATURE
APPLICATIONS
The increased current sinking capability of the UGN5275K ideally suits it for building small, inexpensive brushless dc motors using a minimum number of external components. Figure 2 shows that the only components required to commutate motor windings L1 and L2 are the Hall effect IC, flyback diodes D1 and D2, and one decoupling capacitor. The remaining components are optional for improving motor performance. Care should be taken to ensure that the motor winding impedances are high enough to guarantee that start-up surge currents do not exceed the maximum rating of the Hall effect IC. In the circuit shown, diodes D1 and D2 supply a flyback path for the current of each winding to prevent reactive voltages from exceeding the sustained voltage rating of the Hall-effect IC output transistors. Zener diode Z1 enables the windings to switch more rapidly by allowing the output voltage to rise above the source voltage, while simultaneously clamping the extreme reactive voltages. The maximum output voltage level will be restricted to the following: VCC - VD3 + VZ + VD1 (blocking diode D3 voltage drop). Blocking diode D3 provides reverse input-polarity protection, and should be used only if reverse battery voltage is a possibility. Capacitor C1 decouples the Hall-effect IC from any high dv/dt transients injected onto the VCC rail to prevent regulator latch-up within the device. Zener diode Z2 and resistor R1 are required for operation from a VCC exceeding 14 V.
5275 COMPLEMENTARY OUTPUT POWERHALL(R) LATCH
HYSTERESIS CHARACTERISTICS
SENSOR LOCATION
ACTIVE AREA DEPTH 0.015" 0.38 mm NOM 0.112" 2.86 mm
GUIDE TO INSTALLATION
0.047" 1.19 mm
A
BRANDED SURFACE 1 2 3 4
Dwg. MH-001-3A
Dwg. No. A-12,062
1. All Hall Effect integrated circuits are susceptible to mechanical stress effects. Caution should be exercised to minimize the application of stress to the leads or the epoxy package. Use of epoxy glue is recommended. Other types may deform the epoxy package. 2. To prevent permanent damage to the Hall cell, heat-sink the leads during hand-soldering. Recommended maximum conditions for wave soldering are shown in the graph above.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
5275 COMPLEMENTARY OUTPUT POWERHALL(R) LATCH
Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only)
0.208 0.203
5.28 5.16
45
0.063 0.059
45
1.60 1.50
0.138 0.133 45 0.085
MAX
3.51 3.38 45 2.16
MAX
1
2
3
4
0.033
1
2
3
4
0.84
0.600 0.560
0.015
15.24 14.23
0.38
SEE NOTE
SEE NOTE
0.016
0.050
BSC
Dwg. MH-009C in
0.41
1.27
BSC
Dwg. MH-009C 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. 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.
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.
5275 COMPLEMENTARY OUTPUT POWERHALL(R) LATCH
HALL-EFFECT SENSORS SELECTION GUIDE
Partial Part Number 3046 3054 3056 3058 3059 3060 3121 3122 3123 3132 3133 3134 3141 3142 3143 3144 3161 3175 3177 3185 3187 3188 3189 3195 3197 3235 3275 3421 3422 3503 3515 3516 3517 3518 3625 3626 5140 Avail. Oper. Temp. E/L K/S E/L E/L K/S K/S E/L E/L E/L K/L/S K/L/S E/L E/L E/L E/L E/L E S S E/L E/L E/L E/L E/L L S S E/L E/L S E/L E/L L/S L/S S S E Operate Limits Over Temp. BOP max BRP min Bhys min +200 -200 +300 +5 +225 -225 +300 -300 +100 -100 +35 -35 +500 +80 +430 +120 +470 +160 +95 -95 +75 -75 +50 -40 +175 +10 +245 +60 +355 +150 +450 +25 +160 +30 +180 -180 +150 -150 +300 -300 +175 -175 +200 -200 +250 -250 +200 -200 +200 -200 +200 +15 -200 -15 +250 -250 +300 -300 +85 -85 Typ. 1.3 mV/G Typ. 5.0 mV/G Typ. 2.5 mV/G Typ. 5.0 mV/G Typ. 2.5 mV/G +150 -150 +150 -150 +240 +25 15 5.0 15 150 20 10 60 70 70 30 30 10 20 30 30 20 5.0 80 50 280 100 160 100 110 110 15 15 100 240 10 - - - - - 200* 200* 20 Function Notes Gear-Tooth Sensor Unipolar Multiplex 1 Gear-Tooth Sensor Gear-Tooth Sensor AC Gear-Tooth Sensor AC Gear-Tooth Sensor Unipolar Switch Unipolar Switch Unipolar Switch Bipolar Switch Bipolar Switch Bipolar Switch Unipolar Switch Unipolar Switch Unipolar Switch Unipolar Switch 2-Wire Unipolar Switch Bipolar Latch Bipolar Latch Bipolar Latch Bipolar Latch Bipolar Latch Bipolar Latch Bipolar Latch 2, 3 Bipolar Latch 3 Unipolar Switch 4 Unipolar Switch Bipolar Latch 5 Direction Detection Direction Detection Linear Sensor Chopper-Stabilized Linear Sensor Chopper-Stabilized Linear Sensor Chopper-Stabilized Linear Sensor Chopper-Stabilized Linear Sensor 900 mA Bipolar Latch 3, 5, 6 400 mA Bipolar Latch 3, 5, 6 300 mA Unipolar Switch 3, 6
Operating Temperature Ranges: C = 0C to +70C, S = -20C to +85C, E = -40C to +85C, K = -40C to +125C, L = -40C to +150C Notes 1. Multiplexed two-wire sensor; after proper address, power/signal bus current indicates magnetic field condition. 2. Active pull down. 3. Protected. 4. Output 1 switches on south pole, output 2 switches on north pole for 2-phase, bifilar-wound, unipolar-driven brushless dc motor control. 5. Complementary outputs for 2-phase bifilar-wound, unipolar-driven brushless dc motor control. 6. Power driver output. * Typical. 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.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

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