Startseite Energiemanagement AC/DC- und DC/DC-Controller (externer FET)

LM5021

AKTIV

Strommodus-PWM-Controller (30 V, 1 MHz)

Produktdetails

Operating temperature range (°C) -40 to 125 Control mode Secondary-side regulation Topology Flyback, Forward Rating Catalog Features CCM, DCM, Frequency synchronization, Leading edge blanking, Secondary-side regulated, Skip cycle mode, Slope compensation Duty cycle (max) (%) 80
Operating temperature range (°C) -40 to 125 Control mode Secondary-side regulation Topology Flyback, Forward Rating Catalog Features CCM, DCM, Frequency synchronization, Leading edge blanking, Secondary-side regulated, Skip cycle mode, Slope compensation Duty cycle (max) (%) 80
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • 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
  • 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

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.

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.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM5021 AC-DC Current-Mode PWM Controller datasheet (Rev. E) PDF | HTML 24 Dez 2014
Functional safety information LM5021 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 12 Sep 2022
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Power Tips: Design considerations of high-voltage converters in a cascode MOSFET PDF | HTML 03 Nov 2015
Application note AN-2102 LM3464 and LM5021 DHC 25W Reference Designs (Rev. A) 01 Mai 2013
User guide Load Detecting Power Supply User Guide 27 Jan 2012

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Simulationsmodell

LM5021 Unencrypted PSpice Transient Model

SNVM012.ZIP (623 KB) - PSpice Model
Simulationsmodell

LM5021-1 TINA-TI Transient Reference Design

SNVM454.TSC (552 KB) - TINA-TI Reference Design
Simulationsmodell

LM5021-1 TINA-TI Transient Spice Model

SNVM455.ZIP (19 KB) - TINA-TI Spice Model
Simulationsmodell

LM5021-2 TINA-TI Transient Reference Design

SNVM453.TSC (552 KB) - TINA-TI Reference Design
Simulationsmodell

LM5021-2 TINA-TI Transient Spice Model

SNVM452.ZIP (18 KB) - TINA-TI Spice Model
CAD/CAE-Symbol

Load Detecting Power Supply CAD Files

SNVC021.ZIP (458 KB)

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VSSOP (DGK) 8 Ultra Librarian

Bestellen & Qualität

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  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

Support und Schulungen

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