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NCP1681ABD2R2G - onsemi

Description: Totem Pole PFC Topology Eliminates Input Diode Bridge; Continuous Conduction Mode (CCM) Operation At High Power Level; Optional Multi-mode Operation With CCM at High Power & CrM at Medium Power Level; Frequency Foldback in DCM With 25 kHz Minimum Frequency; Skip Mode in Very Light Load Condition; Novel Current Sense Scheme; Digital Voltage Loop Compensation; AC Line Monitoring Circuit & AC Phase Detection; Near Unity Power Factor in All Operating Modes; PFC OK Indicator

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NCP1681ABD2R2G - onsemi PCB footprint - Other - Other - NCP1681ABD2R2G-4
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NCP1681ABD2R2G Details

  • Manufacturer Part Number:

    NCP1681ABD2R2G

  • Brand Name:

    onsemi

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC20 NB LESS PIN 17 & 19

  • Package Description:

    SOIC-20

  • Manufacturer Package Code:

    751EZ

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    22 Weeks

  • Manufacturer:

    onsemi

  • Analog IC - Other Type:

    POWER FACTOR CONTROLLER

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Min:

    9.4 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    R-PDSO-G20

  • Length:

    9.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    20

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    LSSOP

  • Package Equivalence Code:

    SOP20,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE, LOW PROFILE, SHRINK PITCH

  • Peak Reflow Temperature (Cel):

    260

  • Seated Height-Max:

    1.7 mm

  • Supply Current-Max (Isup):

    4 mA

  • Surface Mount:

    YES

  • Switching Frequency-Max:

    101.7 kHz

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1 mm

  • Terminal Position:

    DUAL

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

    30

  • Width:

    3.9 mm

NCP1681ABD2R2G Frequently Asked Questions (FAQs)

  • The recommended PCB layout for optimal thermal performance involves placing the device on a 2-layer or 4-layer board with a solid ground plane on the bottom layer, and using thermal vias to connect the exposed pad to the ground plane. This helps to dissipate heat efficiently and reduce thermal resistance.
  • To ensure reliable start-up of the converter in a noisy environment, it is recommended to add a soft-start capacitor (Css) between the EN pin and GND, and to use a pull-up resistor (Rpu) between the EN pin and VIN. This helps to filter out noise and ensure a clean start-up signal.
  • The maximum allowed voltage on the EN pin is 6V. Exceeding this voltage can damage the device. It is recommended to use a voltage divider or a zener diode to limit the voltage on the EN pin if the input voltage is higher than 6V.
  • The output voltage ripple of the converter can be calculated using the following formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency.
  • The recommended input capacitor type is a low-ESR ceramic capacitor, such as an X5R or X7R dielectric capacitor. The recommended value is 10uF to 22uF, depending on the input voltage and current requirements.

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NCP1681ABD2R2G Overview

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