UDN2961B Allegro Microsystems Inc, UDN2961B Datasheet

UDN2961B

Manufacturer Part Number

UDN2961B

Description

Manufacturer

Allegro Microsystems Inc

Datasheets

1.UDN2961B.pdf (10 pages)

2.UDN2961B.pdf (12 pages)

Specifications of UDN2961B

Lead Free Status / RoHS Status

Not Compliant

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Company:

BOSTOCK HK LIMITED

Part Number:

UDN2961B

Quantity:

1 531

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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

MODE

INPUT

V REF

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

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

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

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

20 s, 10% duty cycle) . .

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.

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 UDN2961B

UDN2961B Summary of contents

Page 1

... A user-selectable blanking window prevents false triggering of the current control circuitry during chopping. 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 ...

Page 2

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER 10 SUFFIX 'W 2.0 C SUFFIX 'B 6.0 C SUFFIX 'W C SUFFIX 'B C ...

Page 3

Characteristic Output Drivers Output Leakage Current Output Saturation Voltage Output Sustaining Voltage Recovery Diode Leakage Current Recovery Diode Forward Voltage Motor Supply Current Output Rise Time Output Fall Time Control Logic Logic Input Voltage Logic Input Current Reference Input Current ...

Page 4

... HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER 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 pulse-width modulating (PWM) the output driver( fixed off-time, variable- frequency format. The peak current level is set by the user’ ...

Page 5

... INPUT pin turns ON the output drivers. To protect against inductive load voltage transients, an external ground clamp diode is required. A fast-recovery diode is recom- mended to reduce power dissipation in the UDN2961B/W. The blank- ing time prevents false triggering of the current sense comparator, which can be caused by the recovery current spike of the ground clamp diode when the chopping source driver turns ON ...

Page 6

... The output drivers are re-enabled when the junction temperature cools down to approximately +145 C. Two UDN2961B/Ws can be cross connected as shown to form a full-bridge driver circuit. Two full-bridge circuits are needed to drive a two-phase bipolar stepper motor. When in a full-bridge configuration, ...

Page 7

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 limits shown. 2. Lead spacing ...

Page 8

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/MOTOR DRIVER 0.020 INDEX AREA 1 0.065 0.035 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. ...

Page 9

INDEX AREA 1 1.65 0.89 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 ...

Page 10

HIGH-CURRENT HALF-BRIDGE PRINTHEAD/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. † Complete ...

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