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A6841SLWTR-20-T - Allegro Microsystems

Description: Allegro Microsystems A6841SLWTR-20-T Motor Driver IC 20-Pin, SOIC W

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A6841SLWTR-20-T - Allegro Microsystems - PCB symbol
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A6841SLWTR-20-T - Allegro Microsystems PCB footprint - Small Outline Packages - Small Outline Packages - Package LW, 20-Pin SOICW
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A6841SLWTR-20-T - Allegro Microsystems - 3D model - Small Outline Packages - Package LW, 20-Pin SOICW
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A6841SLWTR-20-T Details

  • Manufacturer Part Number:

    A6841SLWTR-20-T

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    SOIC

  • Package Description:

    LEAD FREE, MS-013AC, SOIC-20

  • Pin Count:

    20

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Allegro MicroSystems LLC

  • YTEOL:

    0

  • Additional Feature:

    SPLIT SUPPLY OPERATION POSSIBLE

  • Built-in Protections:

    TRANSIENT

  • Driver Number of Bits:

    8

  • Interface IC Type:

    SIPO BASED PERIPHERAL DRIVER

  • JESD-30 Code:

    R-PDSO-G20

  • JESD-609 Code:

    e3

  • Length:

    12.8 mm

  • Moisture Sensitivity Level:

    3

  • Number of Functions:

    1

  • Number of Terminals:

    20

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -20 °C

  • Output Current Flow Direction:

    SINK

  • Output Current-Max:

    0.35 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP20,.4

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    2.65 mm

  • Supply Voltage-Max:

    5.5 V

  • Supply Voltage-Min:

    3 V

  • Supply Voltage-Nom:

    3.3 V

  • Surface Mount:

    YES

  • Technology:

    CMOS

  • Temperature Grade:

    OTHER

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Time@Peak Reflow Temperature-Max (s):

    40

  • Width:

    7.5 mm

A6841SLWTR-20-T Frequently Asked Questions (FAQs)

  • A good PCB layout for the A6841SLWTR-20-T involves keeping the sense lines as short as possible, using a ground plane to reduce noise, and placing the device close to the motor to minimize lead length. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
  • The sense resistor value depends on the motor current and the desired current sense accuracy. A good starting point is to choose a sense resistor value that results in a sense voltage of around 50-100 mV at the maximum expected motor current. The datasheet provides a formula to calculate the sense resistor value based on the motor current and desired sense voltage.
  • The maximum allowable voltage on the VCC pin is 5.5V. Exceeding this voltage can damage the device. It's recommended to use a voltage regulator or a voltage clamp to ensure the VCC pin voltage remains within the specified range.
  • The A6841SLWTR-20-T has a built-in overcurrent detection feature that can be used to detect overcurrent conditions. The device provides an overcurrent flag (OCF) that can be used to trigger an interrupt or a shutdown of the motor driver. The overcurrent threshold can be set using an external resistor.
  • The thermal resistance of the A6841SLWTR-20-T package is typically around 30°C/W (junction-to-ambient) and 10°C/W (junction-to-case). This information is usually provided in the device's thermal characteristics section of the datasheet.

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A6841SLWTR-20-T Overview

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