A2557KLB Allegro Microsystems Inc, A2557KLB Datasheet

IC DRIVER QUAD 60V 300MA 16-SOIC

A2557KLB

Manufacturer Part Number
A2557KLB
Description
IC DRIVER QUAD 60V 300MA 16-SOIC
Manufacturer
Allegro Microsystems Inc
Type
Low Sider
Datasheets

Specifications of A2557KLB

Number Of Outputs
4
Input Type
Non-Inverting
Current - Output / Channel
300mA
Current - Peak Output
500mA
Voltage - Supply
4.75 V ~ 5.25 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.300", 7.5mm Width)
Switch Type
Low Side
Power Switch Family
A2557
Input Voltage
7V
Output Current
300mA
Mounting
Surface Mount
Supply Current
30mA
Package Type
SOIC W
Operating Temperature (min)
-40C
Operating Temperature Classification
Automotive
Pin Count
16
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
On-state Resistance
-
Lead Free Status / RoHS Status
Not Compliant, Contains lead / RoHS non-compliant

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Manufacturer
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Price
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A2557KLB
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A
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Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan
for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The
information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no respon-
sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
Protected Quad Driver with Fault Detection and Sleep Mode
For existing customer transition, and for new customers or new appli-
cations, contact Allegro Sales.
These parts are in production but have 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 This classification indicates that the product is
obsolete and notice has been given.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: November 1, 2010
Deadline for receipt of LAST TIME BUY orders: April 30, 2011
Recommended Substitutions:
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Last Time Buy
A2557

Related parts for A2557KLB

A2557KLB Summary of contents

Page 1

Protected Quad Driver with Fault Detection and Sleep Mode These parts are in production but have been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device ...

Page 2

Features and Benefits ▪ 300 mA output current per channel ▪ Independent overcurrent protection and thermal limiting for each driver ▪ Output voltage ▪ Output SOA protection ▪ Fault-detection circuitry for open or shorted load ▪ Low ...

Page 3

... Selection Guide Part Number Package A2557KLBTR-T 16-lead SOIC Protected Quad Driver with Fault Detection and Sleep Mode The package offers fused leads for enhanced thermal dissipation. Package 16-lead power wide SOIC for surface-mount applications ...

Page 4

A2557 Absolute Maximum Ratings Characteristic Logic Supply Voltage Input Voltage Output Voltage Overcurrent Protected Output Voltage Output Current FAULT Output Voltage Package Power Dissipation Operating Ambient Temperature Maximum Junction Temperature Storage Temperature with Fault Detection and Sleep Mode Symbol V ...

Page 5

A2557 with Fault Detection and Sleep Mode Pin-out Diagram LB Package IN OUT ENABLE 14 OUT 3 2 GROUND GROUND 4 13 GROUND GROUND 5 12 OUT FAULT IN ...

Page 6

A2557 ELECTRICAL CHARACTERISTICS over operating temperature range, V Characteristic Symbol Output Leakage Current* Output Sustaining Voltage Output Saturation Voltage Over-Current Limit Input Voltage Input Current Fault Output Leakage Current Fault Output Current Fault Output Saturation Voltage V Clamp Diode Forward ...

Page 7

A2557 0 0.2 0 100 200 OUTPUT CURRENT IN MILLIAMPERES 100 200 OUTPUT CURRENT IN MILLIAMPERES with Fault Detection and Sleep Mode TYPICAL OPERATING CHARACTERISTICS 600 500 400 ...

Page 8

A2557 CIRCUIT DESCRIPTION AND APPLICATION The A2557 low-current quad power drivers provide protected output driver functions, combined with a fault diagnostic scheme, plus an automatic low-current Sleep-Mode function. These de- vices monitor their outputs for fault (open or shorted) conditions. ...

Page 9

A2557 CIRCUIT DESCRIPTION AND APPLICATION (continued) NORMAL LAMP IN-RUSH CURRENT THERMAL GRADIENT SENSING CURRENT LIMIT I TRIP 0 TIME Inductive load driver Bifi lar (unipolar) stepper motors (and other inductive loads) can be driven directly. The internal diodes prevent damage ...

Page 10

A2557 CIRCUIT DESCRIPTION AND APPLICATION (continued) IN FAULT (SHORTED LOAD) FAULT (OPEN LOAD) Under some conditions it is possible to get spurious glitches on the FAULT output at load turn-on and turn-off transitions: • Light load turn-off. Under light loading ...

Page 11

A2557 with internally fused pins 4 and 5, and 12 and 13 10.30±0. 16X 0.10 C 1.27 0.41 ±0.10 For Reference Only Pins 4 and 5, and 12 and 13 internally fused Dimensions in millimeters (reference ...

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