LM5025

ACTIVO

Controlador PWM de 90 V con modo de tensión de pinza activa, FET de pinza de canal P o N y umbral CS

Haga su pedido ahora

Hoja de datos

document-pdfAcrobat LM5025 Active Clamp Voltage Mode PWM Controller datasheet (Rev. C) (Inglés) PDF | HTML

LM5025

ACTIVO

Hoja de datos

Haga su pedido ahora

Detalles del producto

Topology

Active-clamp forward, Forward

Control mode

Feedforward

Features

Current limiting, High-voltage startup, Leading edge blanking, Soft start, Supports NFET clamp, Supports PFET clamp, Thermal shutdown

Duty cycle (max) (%)

80

Topology

Active-clamp forward, Forward

Control mode

Feedforward

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 mm × 6.4 mm)

WSON (NHQ)

16

25 mm² (5 mm × 5 mm)

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.

filter

Buscar otro/a Controladores de CA/CC

Descargar Ver vídeo con transcripción Video

Productos similares que pueden interesarle

open-in-new

Comparar alternativas

Reemplazo con funcionalidad mejorada del dispositivo comparado

LM5025A

ACTIVO

Controlador PWM de 90 V con modo de tensión de pinza activa, FET de pinza de canal P o N y umbral CS This product has performance improvement over LM5025.

Documentación técnica

No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.

Ver todo 8

Documentación principal	Tipo	Título	Opciones de formato	Fecha
*	Hoja de datos	LM5025 Active Clamp Voltage Mode PWM Controller datasheet (Rev. C)	PDF \| HTML	14/01/2016
	Guía de selección	Power Management Guide 2018 (Rev. R)		25/06/2018
	Artículo técnico	Power Tips: A simple circuit to implement smooth soft start for an isolated conver	PDF \| HTML	1/05/2017
	Guía del usuario	LM5025 Isolated Active Clamp Forward Converter Ref Design User Guide		27/01/2012
	Nota sobre la aplicación	Operation and Benefits of Active-Clamp Forward Power Converters		22/03/2007
	Informe	PWM DC-DC Cntrllrs w/Built-In Strt-Up Regs Simp Switch Pwr Supply Design		1/10/2005
	Nota sobre la aplicación	Active Clamp Transformer Reset: High Side or Low Side?		17/09/2004
	Más documentación	Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset		15/02/2001

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Modelo de simulación