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

UC3846

ACTIVO

Controlador PWM de 500 kHz y terminación doble con modo de corriente y 0 °C a 70 °C

Detalles del producto

Vin (max) (V) 40 Operating temperature range (°C) 0 to 70 Control mode Current Topology Boost, Flyback, Forward, Half bridge, Push pull Rating Catalog Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology, Soft start, Synchronization pin Duty cycle (max) (%) 50
Vin (max) (V) 40 Operating temperature range (°C) 0 to 70 Control mode Current Topology Boost, Flyback, Forward, Half bridge, Push pull Rating Catalog Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology, Soft start, Synchronization pin Duty cycle (max) (%) 50
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (DW) 16 106.09 mm² 10.3 x 10.3
  • Automatic Feedforward Compensation
  • Programmable Pulse-by-Pulse Current Limiting
  • Automatic Symmetry Correction in Push-Pull
    Configuration
  • Enhanced Load Response Characteristics
  • Parallel Operation Capability for Modular Power
    Systems
  • Differential Current Sense Amplifier with Wide
    Common Mode Range
  • Double-Pulse Suppression
  • 500-mA (Peak) Totem-pole Outputs
  • ±1% Band Gap Reference
  • Undervoltage Lockout
  • Soft-Start Capability
  • Shutdown Terminal
  • 500-kHz Operation
  • Automatic Feedforward Compensation
  • Programmable Pulse-by-Pulse Current Limiting
  • Automatic Symmetry Correction in Push-Pull
    Configuration
  • Enhanced Load Response Characteristics
  • Parallel Operation Capability for Modular Power
    Systems
  • Differential Current Sense Amplifier with Wide
    Common Mode Range
  • Double-Pulse Suppression
  • 500-mA (Peak) Totem-pole Outputs
  • ±1% Band Gap Reference
  • Undervoltage Lockout
  • Soft-Start Capability
  • Shutdown Terminal
  • 500-kHz Operation

The UC1846/7 family of control devices provides all of the necessary features to implement fixed-frequency, current-mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel while maintaining equal current sharing. \

Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic restart or latch the supply off.

Other features include fully-latched operation, double-pulse suppression, deadline adjust capability, and a ±1% trimmed band gap reference.

The UC1846 features low outputs in the OFF state, while the UCx847 features high outputs in the OFF state.

The UC1846/7 family of control devices provides all of the necessary features to implement fixed-frequency, current-mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel while maintaining equal current sharing. \

Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic restart or latch the supply off.

Other features include fully-latched operation, double-pulse suppression, deadline adjust capability, and a ±1% trimmed band gap reference.

The UC1846 features low outputs in the OFF state, while the UCx847 features high outputs in the OFF state.

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Documentación técnica

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Tipo Título Fecha
* Data sheet UCx846/7 Current Mode PWM Controller datasheet (Rev. C) PDF | HTML 04 ene 2016
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
Technical article When should you use PWM controllers? PDF | HTML 02 dic 2016
Technical article Before digital control, there were general-purpose PWMs PDF | HTML 19 oct 2016
Application note DN-45 UC3846, UC3856 and UCC3806 Push Pull PWM Current Mode Control ICs 05 sep 1999
Application note Modeling, Analysis and Compensation of the Current-Mode Converter 05 sep 1999
Application note U-93 A New Integrated Circuit for Current Mode Control 05 sep 1999

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

UCx846 Family PSpice Transient Model

SLUM099.ZIP (54 KB) - PSpice Model
Modelo de simulación

UCx846 Unencrypted PSpice Transient Model

SLUM632.ZIP (2 KB) - PSpice Model
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
PDIP (N) 16 Ultra Librarian
SOIC (DW) 16 Ultra Librarian

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

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

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