UDN2961W Allegro Micro Systems, Inc., UDN2961W Datasheet

UDN2961W

Manufacturer Part Number

UDN2961W

Description

High-current half-bridge printhead/motor driver - with internal current sensing and control

Manufacturer

Allegro Micro Systems, Inc.

Datasheet

1.UDN2961W.pdf (12 pages)

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

UDN2961W

Manufacturer:

ALLEGRO

Quantity:

5 510

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2961

HIGH-CURRENT

HALF-BRIDGE

PRINTHEAD/MOTOR DRIVER

Supply Voltage, V

Output Current, I

Logic Supply Voltage, V

Input Voltage Range,

Package Power Dissipation,

Operating Temperature Range,

Junction Temperature, T

Storage Temperature Range,

Output current rating may be restricted to a value

determined by system concerns and factors.

These include: system duty cycle and timing,

ambient temperature, and use of any heatsinking

and/or forced cooling. For reliable operation, the

specified maximum junction temperature should

not be exceeded.

* Fault conditions that produce excessive junction

temperature will activate device thermal shutdown

circuitry. These conditions can be tolerated, but

should be avoided.

GROUND

ENABLE

ABSOLUTE MAXIMUM RATINGS

MODE

INPUT

REF

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

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

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

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

20 s, 10% duty cycle) . .

UDN2961B

CURRENT-

CONTROL

OUT

LOGIC

PRINTHEAD/MOTOR DRIVER—WITH INTERNAL

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

(continuous) .

. . . . . . . +150 C*

. . . . . . . . . 7.0 V

-55 C to +150 C

-20 C to +85 C

SINK OUT

EMITTER

GROUND

SOURCE OUT

LOGIC SUPPLY

LOAD SUPPLY

Dwg. PP-035

3.4 A

4.0 A

CURRENT SENSING AND CONTROL

2961

specifically for driving solenoid printheads, stepper motors, and dc

motors. The UDN2961B/W consists of a power source driver output,

a power sink driver output, a flyback recovery diode, internal current

sensing circuitry, and a user-selectable fixed off-time chopper circuit.

currents of 3.4 A and peak transient currents of 4 A permitted. The

outputs have been optimized for a low output saturation voltage

(typically 2.6 V total source plus sink drops at 3.4 A).

limited by chopping the output driver(s) in a user-selectable fixed off-

time PWM mode. The maximum output current is determined by the

user’s selection of a reference voltage. The MODE pin determines

whether the current control circuitry will chop in a slow current-decay

mode (only the source driver switching) or in a fast current-decay

mode (source and sink switching). A user-selectable blanking window

prevents false triggering of the current control circuitry during

chopping.

package with a copper lead-frame and heat sinkable tabs for improved

power dissipation capabilities. For higher power dissipation require-

ments, the UDN2961W is supplied in a 12-pin single in-line power tab

package.

FEATURES

Always order by complete part number:

Part Number Package

UDN2961B

UDN2961W

3.4 A, 45 V Source and Sink Drivers

Internal Current Sensing

User-Selectable Fixed Off-Time PWM Current Control

Internal Flyback Diode

Low Output Saturation Voltage

Chip Enable

Fast or Slow Current-Decay Modes

Programmable Blanking Window

Internal Thermal Shutdown Circuitry

The UDN2961B and UDN2961W are 3.4 A half bridges designed

The output drivers are capable of sustaining 45 V with continuous

For output current control, load current is sensed internally and

The UDN2961B is supplied in a 16-pin dual in-line plastic batwing

HIGH-CURRENT HALF-BRIDGE

16-Pin DIP

12-Pin Power-Tab SIP

Related parts for UDN2961W

UDN2961W Summary of contents

Page 1

... The UDN2961B is supplied in a 16-pin dual in-line plastic batwing 3.4 A package with a copper lead-frame and heat sinkable tabs for improved 4.0 A power dissipation capabilities. For higher power dissipation require- ments, the UDN2961W is supplied in a 12-pin single in-line power tab package. FEATURES 3 Source and Sink Drivers Internal Current Sensing ...

Page 2

... Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 W Copyright © 1995, 1996 Allegro MicroSystems, Inc REF V CIRCUIT REF 2940 + R FLIP- V FLOP SENSE - Q SOURCE OUT V BB TSD GROUND UDN2961W V BB CURRENT- CONTROL LOGIC Dwg. PP-036 SINK OUT EMITTER Dwg. FP-019A ...

Page 3

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER ELECTRICAL CHARACTERISTICS 4. 5. Characteristic Output Drivers Output Leakage Current Output Saturation Voltage Output Sustaining Voltage Recovery Diode Leakage Current Recovery Diode Forward Voltage Motor ...

Page 4

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER APPLICATIONS INFORMATION The UDN2961B high current half-bridge designed to drive a number of inductive loads such as printer solenoids, stepper motors, and dc motors. Load current is sensed internally and is controlled by ...

Page 5

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER A logic high on the MODE pin sets the current-control circuitry into the fast-decay mode. When the peak current threshold is detected, the flip-flop is reset and both the source driver and the sink driver ...

Page 6

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER The load supply (V ) should be well decoupled with a capacitor BB placed as close as possible to the device. The EMITTER pin should be connected to a high-current power ground. Thermal shutdown protection ...

Page 7

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER 16 0.280 0.240 1 0.070 0.045 0.210 MAX 0.015 MIN 0.022 0.014 16 7.11 6.10 1 1.77 1.15 5.33 MAX 0.39 MIN 0.558 0.356 NOTES: 1. Exact body and lead configuration at vendor’s option within ...

Page 8

... NOTES: 1. Lead thickness is measured at seating plane or below. 2. Lead spacing tolerance is non-cumulative 3. Exact body and lead configuration at vendor’s option within limits shown. 4. Lead gauge plane is 0.030” below seating plane. UDN2961W Dimensions in Inches (controlling dimensions) 1.260 1.240 0.775 0.245 ...

Page 9

... NOTES: 1. Lead thickness is measured at seating plane or below. 2. Lead spacing tolerance is non-cumulative 3. Exact body and lead configuration at vendor’s option within limits shown. 4. Lead gauge plane is 0.762 mm below seating plane. UDN2961W Dimensions in Millimeters (for reference only) 32.00 31.49 19.69 6.22 19 ...

Page 10

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER This page intentionally left blank 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 ...

Page 11

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER This page intentionally left blank ...

Page 12

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER Function INTEGRATED CIRCUITS FOR BRUSHLESS DC MOTORS 3-Phase Controller/Drivers Hall-Effect Latched Sensors 2-Phase Hall-Effect Sensor/Controller Hall-Effect Complementary-Output Sensor 2-Phase Hall-Effect Sensor/Driver 2-Phase Hall-Effect Sensor/Driver Hall-Effect Complementary-Output Sensor/Driver 3-Phase Back-EMF Controller/Driver 3-Phase Controller/DMOS Driver 3-Phase Back-EMF ...

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