LM5021MMX-1/NOPB by Texas Instruments | | Avnet ASIA
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LM5021MMX-1/NOPB

Texas Instruments

Current Mode PWM Controller 700mA 8-Pin MSOP T/R

Manufacturer Part #: LM5021MMX-1/NOPB

Alternate Part #: LM5021MMX-1/NOPB


legend RoHS Compliant

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Information

The LM5021 off-line pulse width modulation (PWM) controller contains all of the features needed to implement highly efficient off-line single-ended flyback and forward power converters using current-mode control. The LM5021 features include an ultra-low (25 µA) start-up current, which minimizes power losses in the high voltage start-up network. A skip cycle mode reduces power consumption with light loads for energy conserving applications (ENERGY STAR®, CECP, and so forth). Additional features include under-voltage lockout, cycle-by-cycle current limit, hiccup mode overload protection, slope compensation, soft-start and oscillator synchronization capability. This high performance 8-pin IC has total propagation delays less than 100 ns and a 1-MHz capable oscillator that is programmed with a single resistor.

Key Features

  • Ultra Low Start-up Current (25 µA maximum)
  • Current Mode Control
  • Skip Cycle Mode for Low Standby Power
  • Single Resistor Programmable Oscillator
  • Synchronizable Oscillator
  • Adjustable Soft-Start
  • Integrated 0.7 A Peak Gate Driver
  • Direct Opto-Coupler Interface
  • Maximum Duty Cycle Limiting (80% for LM5021-1
    or 50% for LM5021-2)
  • Slope Compensation (LM5021-1 Only)
  • Under Voltage Lockout (UVLO) with Hysteresis
  • Cycle-by-Cycle Over-Current Protection
  • Hiccup Mode for Continuous Overload Protection
  • Leading Edge Blanking of Current Sense Signal
  • Packages: VSSOP-8 or PDIP-8
  • Technical Attributes

    Description
    Value
    Find similar Parts
    Max Processing Temp
    260
    Operating Temperature
    -40 to 125 °C
    Fall Time
    10 ns
    Output Current
    700 mA
    Lead Finish
    Matte Tin
    Mounting
    Surface Mount
    On/Off Pin
    Yes
    Adjustable Output
    Yes
    Number of PWM Outputs
    1
    Maximum Duty Cycle
    50 %
    Rise Time
    25 ns
    Switching Frequency
    500 kHz

    ECCN / UNSPSC

    Description
    Value
    ECCN:
    EAR99
    SCHEDULE B:
    8542.39.00.00
    HTSN:
    8542.39.00.00
    UNSPSC:
    32101600
    UNSPSC VERSION:
    V15.1101

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    USD    $0.7143

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  • Lead time: 8 weeks
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