Datasheet UGN5275K Datasheet (Allegro)

5275

COMPLEMENTARY OUTPUT
POWERHALL® LATCH

X

Data Sheet

27632A

5275

COMPLEMENTARY OUTPUT

POWER HALL® 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.

V

CC

1

SUPPLY

Pinning is shown viewed from branded side.

ABSOLUTE MAXIMUM RATINGS

at T

A

Supply Voltage, VCC. . . . . . . . . . . . . . . 14 V

Magnetic Flux Density, B . . . . . . Unlimited

Output OFF Voltage, VCE. . . . . . . . . . . 60 V

DISCONTINUED PRODUCT

Output ON Current, I

Continuous . . . . . . . . . . . . . . . . . 0.5 A

Peak (Start Up) . . . . . . . . . . . . . . 0.9 A

Operating Temperature Range,

TA . . . . . . . . . . . . . . . . . -20°C to +85°C

Storage Temperature Range,

TS . . . . . . . . . . . . . . . . -65°C to +150°C

Package Power Dissipation,

PD .. . . . . . . . . . . . . . . . . . . . . 750 mW

— FOR REFERENCE ONLY

32

OUTPUT

= +25°C

C

4

OUTPUT

Dwg. PH-002

GROUND

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 µs 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

-20°C to +85°C, and is supplied in an environmentally rugged, four-pin
miniature plastic SIP. Consult the factory for alternate packaging and
custom magnetic requirements.

FEATURES

■ 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

3

2

4

COMPLEMENTARY OUTPUT
POWERHALL® LATCH

ELECTRICAL CHARACTERISTICS at T

= +25°C, V

A

= 4.5 V to 14 V

CC

(unless otherwise noted).

Characteristic Symbol Test Conditions Min. Typ. Max. Units

Supply Voltage V
Output Saturation Voltage V
Output Leakage Current I
Supply Current l
Output Rise Time t
Output Fall Time t
Switch Time

Differential ∆tV

CC

CE(SAT)

CEX

CC

r

f

VCC = 14 V, IC = 300 mA — 400 600 mV
VCE = 14 V, VCC = 14 V — — 10 µA
VCC = 14 V, Output Open — 18 30 mA
VCC = 14 V, RL = 45 Ω, CL = 20 pF — 0.3 1.5 µs
VCC = 14 V, RL = 45 Ω,CL = 20 pF — 0.3 1.5 µs

= 14 V, RL = 45 Ω, CL = 20 pF — 1.0 3.0 µs

CC

4.5 — 14 V

MAGNETIC CHARACTERISTICS

TA = +25°CT

Characteristic Symbol Min. Max. Min. Max. Units

Operate Point B
Release Point B
Hysteresis B

OP

RP

hys

25 250 15 250 G

-250 -25 -250 -15 G
100 — 100 — G

= -20°C to +85°C

A

NOTE: As used here, negative flux densities are defined as less than zero (algebraic convention).

TEST CIRCUIT

FUNCTIONAL BLOCK DIAGRAM

V

1

CC

REG.

X

OUTPUT

OUTPUT

GROUND

Dwg. FH-002

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
Copyright © 1988, 1995, Allegro MicroSystems, Inc.

5275

COMPLEMENTARY OUTPUT
POWERHALL® LATCH

MOTOR COIL DRIVER

SWITCH POINTS VERSUS

TEMPERATURE

FIGURE 2

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® LATCH

HYSTERESIS CHARACTERISTICS

SENSOR LOCATION

ACTIVE AREA DEPTH

0.015"

0.38 mm
NOM

BRANDED
SURFACE

A

1 432

0.112"

2.86 mm

0.047"

1.19 mm

Dwg. MH-001-3A

GUIDE TO INSTALLATION

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 [phone]

5275

COMPLEMENTARY OUTPUT
POWERHALL® LATCH

45°

0.138

0.133

0.600

0.560

Dimensions in Inches

(controlling dimensions)

0.208

0.203

0.085

1234

MAX

0.063

0.059

0.033

0.015

45°

Dimensions in Millimeters

(for reference only)

5.28

5.16

45°

3.51

3.38

2.16

1234

MAX

15.24

14.23

1.60

1.50

45°

0.84

0.38

SEE NOTE

0.016

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.

0.050

BSC

Dwg. MH-009C in

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.

SEE NOTE

0.41

1.27

BSC

Dwg. MH-009C mm

5275

COMPLEMENTARY OUTPUT
POWERHALL® LATCH

HALL-EFFECT SENSORS SELECTION GUIDE

Partial Part Avail. Oper. ␣ Operate Limits Over Temp.␣
Number Temp. B

3046 E/L [phone] Gear-Tooth Sensor
3054 K/S +300 +5 5.0 Unipolar Multiplex 1
3056 E/L [phone] Gear-Tooth Sensor
3058 E/L [phone] Gear-Tooth Sensor
3059 K/S [phone] AC Gear-Tooth Sensor
3060 K/S +35 -35 10 AC Gear-Tooth Sensor
3121 E/L +500 +80 60 Unipolar Switch
3122 E/L +430 +120 70 Unipolar Switch
3123 E/L +470 +160 70 Unipolar Switch
3132 K/L/S +95 -95 30 Bipolar Switch
3133 K/L/S +75 -75 30 Bipolar Switch
3134 E/L +50 -40 10 Bipolar Switch
3141 E/L +175 +10 20 Unipolar Switch
3142 E/L +245 +60 30 Unipolar Switch
3143 E/L +355 +150 30 Unipolar Switch
3144 E/L +450 +25 20 Unipolar Switch
3161 E +160 +30 5.0 2-Wire Unipolar Switch
3175 S [phone] Bipolar Latch
3177 S [phone] Bipolar Latch
3185 E/L [phone] Bipolar Latch
3187 E/L [phone] Bipolar Latch
3188 E/L [phone] Bipolar Latch
3189 E/L [phone] Bipolar Latch
3195 E/L [phone] Bipolar Latch 2, 3
3197 L [phone] Bipolar Latch 3
3235 S +200 +15 15 Unipolar Switch 4

3275 S [phone] Bipolar Latch 5
3421 E/L [phone] Direction Detection
3422 E/L +85 -85 10 Direction Detection
3503 S Typ. 1.3 mV/G – Linear Sensor
3515 E/L Typ. 5.0 mV/G – Chopper-Stabilized Linear Sensor
3516 E/L Typ. 2.5 mV/G – Chopper-Stabilized Linear Sensor
3517 L/S Typ. 5.0 mV/G – Chopper-Stabilized Linear Sensor
3518 L/S Typ. 2.5 mV/G – Chopper-Stabilized Linear Sensor
3625 S [phone]* 900 mA Bipolar Latch 3, 5, 6
3626 S [phone]* 400 mA Bipolar Latch 3, 5, 6
5140 E +240 +25 20 300 mA Unipolar Switch 3, 6

Operating Temperature Ranges:

C = 0°C to +70°C, S = -20°C to +85°C, E = -40°C to +85°C, K = -40°C to +125°C, L = -40°C to +150°C

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.

max B

OP

-200 -15 15 Unipolar Switch

min B

RP

min Function† Notes

hys

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]