3625 datasheet, PDF - EEWORLD Datasheet

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3625: DescriptionBRUSHLESS DC MOTOR CONTROLLER, 0.75 A, PDIP8; Categoryaccessories; File Size146KB，8 Pages; ManufacturerAllegro; Websitehttp://www.allegromicro.com/

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3625 Overview

BRUSHLESS DC MOTOR CONTROLLER, 0.75 A, PDIP8

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3625

AND

3626

OWER

ALL®

SENSOR/DRIVERS

FOR BRUSHLESS DC MOTORS

Requiring a minimum of external components, the UDN3625M

and UDN3626M are monolithic ICs that provide single-chip control

and direct drive solutions for many small, single-phase, unipolar

brushless dc motor applications. Integrated into the ICs are a high-

sensitivity Hall-effect sensor, control and commutating logic, a stable

voltage regulator, extensive self and system protective functions, and

two high-current saturated npn outputs. Both ICs include thermal

shutdown, output over-current limiting, and output transient protection/

flyback diodes. The UDN3625M is nominally for 12 V motor applica-

tions while the UDN3626M is better suited to 24 V motors.

Output over-current limiting (relating to startup surge or a locked

rotor condition) and short-circuit protection are provided by an internal

current-sense resistor. The maximum (default) output load current is

typically 1.3 A for the UDN3625M or 600 mA for the UDN3626M,

but may be decreased by user selection of an external low-wattage

resistor.

A separate low-level output provides tachometer capability for

motor speed control or sensing a locked rotor condition. With appro-

priate external logic, pulse-width modulated (PWM) speed control can

be accomplished at the output current adjust pin.

These sensor/drivers are supplied in an 8-pin mini-DlP plastic

package with a copper leadframe for increased package power

handling capability.

Data Sheet

27690A

CONTACT FACTORY

for availability

and latest information

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, V

. . . . . . . . . .

See Table

Output Current, I

. . . . . . . . . . . .

See Table

PWM Current Control Voltage,

ADJ

. . . . . . . . . . . . .

See Applications

Magnetic Flux Density, B . . . . . .

Unlimited

Package Power Dissipation,

. . . . . . . . . . . . . . . . . . . .

See Graph

Operating Temperature Range,

. . . . . . . . . . . . . . . . .

-20

C to +85

Storage Temperature Range,

. . . . . . . . . . . . . . . .

-65

C to +150

UDN3625M

CC(MAX)

O(CONT)

O(PEAK)

14 V

1.0 A

1.6 A

UDN3626M

26 V

0.45 A

0.75 A

FEATURES

900 mA /12 V or 400 mA /24 V Operation

Speed-Control (PWM) Capability

Locked-Rotor Indication

Minimum External Components

Over-Current Protected

Thermal Protection

Enhanced Reliability

Reduced Cost

Output current rating will be limited by

ambient temperature, supply voltage, and

duty cycle. Under any set of conditions, do

not exceed a junction temperature of

+150°C.

Always order by complete part number, e.g.,

UDN3625M

See Maximum Ratings at left.

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