UDN2916LB-T Allegro Microsystems Inc, UDN2916LB-T Datasheet

UDN2916LB-T

Manufacturer Part Number

UDN2916LB-T

Description

IC MOTOR DRIVER PWM DUAL 24-SOIC

Manufacturer

Allegro Microsystems Inc

Datasheets

1.UDN2916LBTR-T.pdf (10 pages)

2.UDN2916LB-T.pdf (9 pages)

Specifications of UDN2916LB-T

Applications

DC Motor Driver, Stepper Motor Driver

Number Of Outputs

2/1

Current - Output

±750mA

Voltage - Load

10 V ~ 45 V

Voltage - Supply

4.75 V ~ 5.25 V

Operating Temperature

-20°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

24-SOIC (7.5mm Width)

Operating Current

25mA

Operating Temperature Classification

Commercial

Package Type

SOIC W

Operating Supply Voltage (min)

4.75V

Operating Supply Voltage (max)

5.25V

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

620-1119

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Features and Benefits

▪ 750 mA continuous output current

▪ 45 V output sustaining voltage

▪ Internal clamp diodes

▪ Internal PWM current control

▪ Low output saturation voltage

▪ Internal thermal shutdown circuitry

▪ Similar to dual PBL3717 or UC3770

Packages

29319.20N

with internally-fused leads

Package EB 44-pin PLCC

Package B 24-pin

Package LB 24-pin

Batwing SOICW

Batwing DIP

'B' PACKAGE,

CHANNEL 1

PIN NUMBERS

SHOWN.

Not to scale

40 k

REF

20 k

PWM Current-Control Circuitry

10 k

Dual Full-Bridge PWM Motor Driver

OUT A

OUT B

R C

Description

The UDx2916 motor drivers drive both windings of a bipolar

stepper motor or bidirectionally control two DC motors.

Both bridges are capable of sustaining 45 V and include

internal pulse-width modulation (PWM) control of the

output current to 750 mA. The outputs have been optimized

for a low output saturation voltage drop (less than 1.8 V

total source plus sink at 500 mA).

For PWM current control, the maximum output current is

determined by user selection of a reference voltage and sensing

resistor. Two logic-level inputs select output current limits of

0%, 33%, 67%, or 100% of the maximum level. A PHASE

input to each bridge determines load current direction.

The bridges include both ground-clamp and flyback diodes for

protection against inductive transients. Internally generated

delays prevent crossover currents when switching current

direction. Special power-up sequencing is not required. Thermal

protection circuitry disables the outputs if the chip temperature

exceeds safe operating limits.

The device is supplied in a 24-pin dual in-line plastic (DIP,

package B) with two pairs of batwing leads as heat-sinkable

tabs for enhanced power dissipation capabilities. The LB

package is a 24-lead surface-mount wide SOIC with two pairs

Continued on the next page…

SENSE

–

SHOT

ONE

Dwg. EP-007B

SOURCE

DISABLE

2916

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UDN2916LB-T Summary of contents

Page 1

Features and Benefits ▪ 750 mA continuous output current ▪ output sustaining voltage ▪ Internal clamp diodes ▪ Internal PWM current control ▪ Low output saturation voltage ▪ Internal thermal shutdown circuitry ▪ Similar to dual PBL3717 or ...

Page 2

... Selection Guide Part Number Package UDN2916B-T 24-pin batwing DIP UDN2916EB-T 44-pin internally fused lead PLCC UDN2916EBTR-T 44-pin internally fused lead PLCC UDN2916LB-T 24-pin batwing SOICW UDN2916LBTR-T 24-pin batwing SOICW UDQ2916EB-T 44-pin internally fused lead PLCC UDQ2916EBTR-T 44-pin internally fused lead PLCC UDQ2916LB-T ...

Page 3

EB Package (PLCC) GND 7 PWM GND Package (SOIC PHASE REF ...

Page 4

ELECTRICAL CHARACTERISTICS 5.0 V (unless otherwise noted). REF Characteristic Output Drivers (OUT or OUT ) A B Motor Supply Range Output Leakage Current Output Sustaining Voltage Output Saturation Voltage Clamp Diode Leakage Current Clamp ...

Page 5

PWM CURRENT CONTROL The UDx2916 dual bridges drive both windings of a bipolar stepper motor. Output current is sensed and controlled independently in each bridge by an external sense resistor, R internal comparator, and monostable multivibrator. When the bridge ...

Page 6

LOGIC CONTROL OF OUTPUT CURRENT Two logic level inputs (I and winding current at 100%, 67%, 33 the maximum level per the table. The 0% output current condition turns off all drivers in ...

Page 7

APPLICATION NOTES Current Sensing To minimize current sensing inaccuracies caused by ground trace IR drops, each current-sensing resistor should have a separate return to the ground terminal of the device. For low-value sense resistors, the IR drops in the ...

Page 8

External batwings, Pins 6, 7, 18, and 19 are fused internally 0.005 External batwings, Pins 6, 7, 18, and 19 are fused internally 16X 0.10 C 0.41 All dimensions nominal, not ...

Page 9

External batwings, Pins 7 through 17 and 29 through 39 are fused internally Preliminary dimensions, for reference only (reference JEDEC MS-018 AC) Dimensions in inches Millimeters (mm) in brackets, for reference only Dimensions exclusive of mold flash, gate burrs, ...

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