UDQ2917 Allegro MicroSystems, UDQ2917 Datasheet

UDQ2917

Manufacturer Part Number

UDQ2917

Description

DUAL FULL-BRIDGE PWM MOTOR DRIVER

Manufacturer

Allegro MicroSystems

Datasheet

1.UDQ2917.pdf (8 pages)

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GND

Motor Supply Voltage, V

Output Current, I

Logic Supply Voltage, V

Logic Input Voltage Range,

Output Emitter Voltage, V

Package Power Dissipation,

Operating Temperature Range,

Storage Temperature Range,

Output current rating may be limited by duty cycle,

ambient temperature, and heat sinking. Under any

set of conditions, do not exceed the specified peak

current rating or a junction temperature of +150°C.

(Continuous) ...............................

......................................... See Graph

.................................. -20

................................ -55

................................ -0.3 V to +7.0 V

OUT

≤

≤ 20 µs) .....

PWM 1

.................... 7.0 V

.................... 45 V

................... 1.0 V

PWM 2

C to +150

C to +85

Dwg. PP-021

1.75 A

1.5 A

Dwg. PP-021

GND

2 9 1 7

of a bipolar stepper motor or bidirectionally control two dc motors. Both

bridges are capable of sustaining 45 V and include internal pulse-width modula-

tion (PWM) control of the output current to 1.5 A.

user’s 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. Active-

low ENABLE inputs control the four drivers in each bridge.

against inductive transients. Internally generated delays prevent cross-over

currents when switching current direction. Special power-up sequencing is not

required. Thermal protection circuitry disables the outputs if the chip tempera-

ture exceeds safe operating limits.

applications. Its batwing construction provides for maximum package power

dissipation in the smallest possible construction. The UDN2917EB is available

for operation from -40°C to +85°C. To order, change the prefix from 'UDN' to

'UDQ'. This device is also available on special order for operation to +125°C.

Always order by complete part number: UDN2917EB .

1.5 A Continuous Output Current

45 V Output Sustaining Voltage

Internal Clamp Diodes

Digital Control of Output Current

Internal Thermal Shutdown Circuitry

Similar to Dual PBL3770

The UDN2917EB motor driver is designed to drive both windings

For PWM current control, the maximum output current is determined by the

The bridges include both ground clamp and flyback diodes for protection

The UDN2917EB is supplied in a 44-lead power PLCC for surface-mount

PWM MOTOR DRIVER

DUAL FULL-BRIDGE

Related parts for UDQ2917

UDQ2917 Summary of contents

Page 1

GND 7 PWM PWM 2 GND 17 Dwg. PP-021 ≤ ° Motor Supply Voltage, V .................... ± ≤ 20 µs) ..... Output Current ...

... Don’t care Z = High impedance 125 150 Dwg. GP-020B 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1991, 2000 Allegro MicroSystems, Inc. ONE SOURCE SHOT DISABLE Dwg. EP-007-2A Enable Phase ...

Page 3

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 Diode Forward Voltage Driver Supply Current Control Logic Input Voltage Input Current Reference Voltage ...

Page 4

DUAL FULL-BRIDGE PWM MOTOR DRIVER The UDN2917EB dual bridge is designed to drive both windings of a bipolar stepper motor. Output current is sensed and con- trolled independently in each bridge by an external sense resistor (R ), internal ...

Page 5

I I Output Current /10 R REF / 2/3 I REF / 1/3 I REF www.allegromicro.com Loads with high ...

Page 6

DUAL FULL-BRIDGE PWM MOTOR DRIVER 0.319 0.291 0.021 0.013 0.319 0.291 0.050 BSC 8.10 7.39 0.533 0.331 8.10 7.39 1.27 BSC 28 29 0.032 0.026 0.695 0.685 0.656 0.650 0.020 0.656 MIN 0.650 0.180 0.165 28 ...

Page 7

... PWM MOTOR DRIVER The products described here are manufactured under one or more U.S. patents or U.S. 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 ...

Page 8

DUAL FULL-BRIDGE PWM MOTOR DRIVER * Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or over-current protection voltage limits. Negative current is defined as coming out of (sourcing) the output. † ...

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