A2919SLB-T

A2919SLB-T Datasheet

A2919 Dual Full-Bridge PWM Motor Driver

Part	Datasheet
A2919SLB-T	A2919SLB-T (pdf)

Related Parts	Information
A2919SLBTR-T	A2919SLBTR-T
A2919SB	A2919SB
A2919SLB	A2919SLB
A2919SLBTR	A2919SLBTR

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A2919 Dual Full-Bridge PWM Motor Driver Last Time Buy This part is in production but has been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available. Date of status change May 3, 2010 Deadline for receipt of LAST TIME BUY orders October 29, 2010 Recommended Substitutions: For existing customer transition, and for new customers or new applications, contact Allegro Sales. NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. A2919 Dual Full-Bridge PWM Motor Driver 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 Half- or quarter-step operation of bipolar stepper motors Package 24-pin SOIC with exposed thermal tabs suffix LB The A2919 motor driver is designed to 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 V total source plus sink at 500 mA . For PWM current control, the maximum output current is determined by the user’s selection of a reference voltage and sensing resistor. Two logic-level inputs select output current limits of 0%, 41%, 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. Not to scale Continued on the next I 01 13 I1 12 PWM Control Circuitry Channel 1 pin numbers shown VREF1 10 LOAD SUPPLY 24 VBB OUT 1A OUT 1B 60 k7 16 E1 120 k7 w10 42 k7 SENSE1 ONE SHOT 9 RC1 SOURCE DISABLE 29319.21G Dwg. EP-007-3 A2919 Dual Full-Bridge PWM Motor Driver Description continued The A2919 is supplied in a 24-pin surface-mountable SOICW with dissipation in the smallest possible construction. The A2919 is heat sinkable tabs for improved power dissipation capabilities available for operation from -20°C to 85°C, and are also available This batwing construction provides for maximum package power on special order for operation to +125°C. Selection Guide Part Number A2919SLBTR-T Packing 1000 pieces per reel Package 24-pin SOICW with exposed thermal tabs Absolute Maximum Ratings Characteristic

PDF Datasheet Preview

A2919 Dual Full-Bridge PWM Motor Driver

Last Time Buy

This part is in production but has been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available. Date of status change May 3, 2010 Deadline for receipt of LAST TIME BUY orders October 29, 2010

Recommended Substitutions:

For existing customer transition, and for new customers or new applications, contact Allegro Sales.

NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative.

A2919 Dual Full-Bridge PWM Motor Driver
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 Half- or quarter-step operation of bipolar stepper motors

Package 24-pin SOIC with exposed thermal tabs suffix LB

The A2919 motor driver is designed to 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 V total source plus sink at 500 mA .

For PWM current control, the maximum output current is determined by the user’s selection of a reference voltage and sensing resistor. Two logic-level inputs select output current limits of 0%, 41%, 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.

Not to scale

Continued on the next

I 01 13 I1 12

PWM Control Circuitry

Channel 1 pin numbers shown

VREF1 10

LOAD SUPPLY 24 VBB

OUT 1A

OUT 1B
60 k7
16 E1
120 k7
w10 42 k7

SENSE1

ONE SHOT
9 RC1

SOURCE DISABLE
29319.21G

Dwg. EP-007-3

A2919

Dual Full-Bridge PWM Motor Driver

Description continued

The A2919 is supplied in a 24-pin surface-mountable SOICW with dissipation in the smallest possible construction. The A2919 is heat sinkable tabs for improved power dissipation capabilities available for operation from -20°C to 85°C, and are also available This batwing construction provides for maximum package power on special order for operation to +125°C.

Selection Guide Part Number

A2919SLBTR-T

Packing 1000 pieces per reel

Package 24-pin SOICW with exposed thermal tabs

Absolute Maximum Ratings

Characteristic

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived A2919SLB-T Datasheet file may be downloaded here without warranties.

Datasheet ID: A2919SLB-T 516013