Inicio Gestión de la energía Controladores CA/CC y CC/CC (FET externo)
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Gestión de la energía
Controladores CA/CC y CC/CC (FET externo)

UC2578

NO RECOMENDADO PARA NUEVOS DISEÑOS

Regulador de tensión de paso a paso del modulador de ancho de impulso reductor

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UC2578 no se recomienda para nuevos diseños
Este producto sigue estando disponible para los clientes existentes. Los nuevos diseños deben considerar un producto alternativo.
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Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
LM5145 ACTIVO Controlador reductor síncrono de 75 V con amplio rango de tensión de entrada y ciclo de trabajo Voltage mode controller with adjustable switching frequency
Funcionalidad similar a la del dispositivo comparado
TPSM365R3 ACTIVO Módulo de alimentación de convertidor reductor síncrono de 0.3 A, entrada de 3 V a 65 V, salida de 1 Save board space, simplify design and speed time to market with an integrated-inductor power module.

UC2578

NO RECOMENDADO PARA NUEVOS DISEÑOS
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Detalles del producto

Vin (min) (V) 11 Vin (max) (V) 72 Iout (max) (A) 0.2 Operating temperature range (°C) -40 to 85 Control mode Voltage mode Rating Catalog Vout (min) (V) 5 Vout (max) (V) 62 Features Enable Iq (typ) (µA) 10000 Duty cycle (max) (%) 100
Vin (min) (V) 11 Vin (max) (V) 72 Iout (max) (A) 0.2 Operating temperature range (°C) -40 to 85 Control mode Voltage mode Rating Catalog Vout (min) (V) 5 Vout (max) (V) 62 Features Enable Iq (typ) (µA) 10000 Duty cycle (max) (%) 100
  • Provides Simple Single Inductor Buck PWM Step-Down Voltage Regulation
  • Drives External High Side NMOS Switch
  • 14V to 72V Input Voltage Operating Range
  • Contains 100kHz Internal Oscillator, 2V Reference and UVLO
  • Soft Start on Power Up
  • Overcurrent Shutdown Followed by Soft Start
  • Provides Simple Single Inductor Buck PWM Step-Down Voltage Regulation
  • Drives External High Side NMOS Switch
  • 14V to 72V Input Voltage Operating Range
  • Contains 100kHz Internal Oscillator, 2V Reference and UVLO
  • Soft Start on Power Up
  • Overcurrent Shutdown Followed by Soft Start

The UC3578 is a PWM controller with an integrated high side floating gate driver. It is used in buck step down converters and regulates a positive output voltage. Intended to be used in a distributed power system, the IC allows operation from 14V to 72V input voltage which range includes the prevalent telecomm bus voltages. The output duty cycle of the UC3578 can vary between 0% and 90% for operation over the wide input voltage and load conditions.

The UC3578 simplifies the design of the single switch PWM buck converter by incorporating a floating high side driver for an external N-channel MOSFET switch. It also features a 100kHz fixed frequency oscillator, an internal 2V precision reference, an error amplifier configured for voltage mode operation, and a PWM comparator with latching logic. Complementing the traditional voltage mode control block, the UC3578 incorporates an overcurrent shutdown circuit with full cycle soft re-start to limit the input current to a user defined maximum value during overload operation. Additional functions include an under voltage lockout circuit to insure that sufficient input supply voltage is present before any switching activity can occur.

The UC2578 and the UC3578 are both available in surface mount and thru-hole power packages.

The UC3578 is a PWM controller with an integrated high side floating gate driver. It is used in buck step down converters and regulates a positive output voltage. Intended to be used in a distributed power system, the IC allows operation from 14V to 72V input voltage which range includes the prevalent telecomm bus voltages. The output duty cycle of the UC3578 can vary between 0% and 90% for operation over the wide input voltage and load conditions.

The UC3578 simplifies the design of the single switch PWM buck converter by incorporating a floating high side driver for an external N-channel MOSFET switch. It also features a 100kHz fixed frequency oscillator, an internal 2V precision reference, an error amplifier configured for voltage mode operation, and a PWM comparator with latching logic. Complementing the traditional voltage mode control block, the UC3578 incorporates an overcurrent shutdown circuit with full cycle soft re-start to limit the input current to a user defined maximum value during overload operation. Additional functions include an under voltage lockout circuit to insure that sufficient input supply voltage is present before any switching activity can occur.

The UC2578 and the UC3578 are both available in surface mount and thru-hole power packages.
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Documentación técnica

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* Data sheet Buck Pulse Width Modulator Stepdown Voltage Regulator datasheet 05 sep 1999

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje