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

LM5025

AKTIV

PWM-Controller mit 90 V aktivem Klemmspannungs-Modus und P oder N-Kanal-Klemmen-FET und 0,25V CS-Sch

Produktdetails

Vin (max) (V) 15 Operating temperature range (°C) -40 to 125 Control mode Feedforward Topology Active-clamp forward, Forward Rating Catalog Features Current limiting, High-voltage startup, Leading edge blanking, Soft start, Supports NFET clamp, Supports PFET clamp, Thermal shutdown Duty cycle (max) (%) 80
Vin (max) (V) 15 Operating temperature range (°C) -40 to 125 Control mode Feedforward Topology Active-clamp forward, Forward Rating Catalog Features Current limiting, High-voltage startup, Leading edge blanking, Soft start, Supports NFET clamp, Supports PFET clamp, Thermal shutdown Duty cycle (max) (%) 80
TSSOP (PW) 16 32 mm² 5 x 6.4 WSON (NHQ) 16 25 mm² 5 x 5
  • Internal Start-Up Bias Regulator
  • 3-A Compound Main Gate Driver
  • Programmable Line Undervoltage Lockout (UVLO)
    With Adjustable Hysteresis
  • Voltage Mode Control With Feed-Forward
  • Adjustable Dual-Mode Overcurrent Protection
  • Programmable Overlap or Deadtime Between the
    Main and Active Clamp Outputs
  • Volt × Second Clamp
  • Programmable Soft-Start
  • Leading Edge Blanking
  • Single Resistor Programmable Oscillator
  • Oscillator UP and DOWN Sync Capability
  • Precision 5-V Reference
  • Thermal Shutdown
  • Internal Start-Up Bias Regulator
  • 3-A Compound Main Gate Driver
  • Programmable Line Undervoltage Lockout (UVLO)
    With Adjustable Hysteresis
  • Voltage Mode Control With Feed-Forward
  • Adjustable Dual-Mode Overcurrent Protection
  • Programmable Overlap or Deadtime Between the
    Main and Active Clamp Outputs
  • Volt × Second Clamp
  • Programmable Soft-Start
  • Leading Edge Blanking
  • Single Resistor Programmable Oscillator
  • Oscillator UP and DOWN Sync Capability
  • Precision 5-V Reference
  • Thermal Shutdown

The LM5025 PWM controller contains all of the features necessary to implement power converters using the active clamp and reset technique. The device can be configured to control either a P-channel clamp switch or an N-channel clamp switch. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp and reset techniques.

Two control outputs are provided, the main power switch control (OUT_A), and the active clamp switch control (OUT_B). The active clamp output can be configured for either a specified overlap time (for P-channel switch applications) or a specified deadtime (for N_channel applications). The two internal compound gate drivers parallel both MOS and bipolar devices, providing superior gate drive characteristics. This controller is designed for high-speed operation including an oscillator frequency range up to 1 MHz and total PWM and current sense propagation delays less than 100 ns.

The LM5025 includes a high-voltage start-up regulator that operates over a wide input range of 13 V to 90 V. Additional features include: line undervoltage lockout (UVLO), soft-start, oscillator UP and DOWN sync capability, precision reference and thermal shutdown.

The LM5025 PWM controller contains all of the features necessary to implement power converters using the active clamp and reset technique. The device can be configured to control either a P-channel clamp switch or an N-channel clamp switch. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp and reset techniques.

Two control outputs are provided, the main power switch control (OUT_A), and the active clamp switch control (OUT_B). The active clamp output can be configured for either a specified overlap time (for P-channel switch applications) or a specified deadtime (for N_channel applications). The two internal compound gate drivers parallel both MOS and bipolar devices, providing superior gate drive characteristics. This controller is designed for high-speed operation including an oscillator frequency range up to 1 MHz and total PWM and current sense propagation delays less than 100 ns.

The LM5025 includes a high-voltage start-up regulator that operates over a wide input range of 13 V to 90 V. Additional features include: line undervoltage lockout (UVLO), soft-start, oscillator UP and DOWN sync capability, precision reference and thermal shutdown.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM5025 Active Clamp Voltage Mode PWM Controller datasheet (Rev. C) PDF | HTML 14 Jan 2016
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Power Tips: A simple circuit to implement smooth soft start for an isolated conver PDF | HTML 01 Mai 2017
EVM User's guide AN-1345 LM5025A Evaluation Board (Rev. B) 06 Mai 2013
EVM User's guide AN-1368 LM5115/5025A Evaluation Board (Rev. A) 26 Apr 2013
EVM User's guide AN-1542 LM5115A Evaluation Board (Rev. B) 24 Apr 2013
More literature Die D/S LM5025 MDC Active Clamp Voltage Mode Pwm Controller 27 Sep 2012
User guide LM5025 Isolated Active Clamp Forward Converter Ref Design User Guide 27 Jan 2012
Application note Operation and Benefits of Active-Clamp Forward Power Converters 22 Mär 2007
White paper PWM DC-DC Cntrllrs w/Built-In Strt-Up Regs Simp Switch Pwr Supply Design 01 Okt 2005
Application note Active Clamp Transformer Reset: High Side or Low Side? 17 Sep 2004
More literature Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset 15 Feb 2001

Design und Entwicklung

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

Simulationsmodell

LM5025 PSPICE Model (Rev. A)

SNVM013A.ZIP (63 KB) - PSpice Model
Simulationsmodell

LM5025 TINA-TI Transient Reference Design

SNVMBD8.TSC (2675 KB) - TINA-TI Reference Design
Simulationsmodell

LM5025 TINA-TI Transient Spice Model

SNVMBD9.ZIP (26 KB) - TINA-TI Spice Model
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
TSSOP (PW) 16 Ultra Librarian
WSON (NHQ) 16 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

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