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

UC1844A

ACTIVO

Controlador PWM con modo de corriente

Detalles del producto

Vin (max) (V) 30 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating Military Features Error amplifier, Fixed frequency, Multi-topology Duty cycle (max) (%) 50
Vin (max) (V) 30 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating Military Features Error amplifier, Fixed frequency, Multi-topology Duty cycle (max) (%) 50
CDIP (JG) 8 64.032 mm² 9.6 x 6.67 LCCC (FK) 20 79.0321 mm² 8.89 x 8.89
  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High-Current Totem Pole Output
  • Internally-Trimmed Bandgap Reference
  • Up to 500kHz Operation
  • Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer
  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High-Current Totem Pole Output
  • Internally-Trimmed Bandgap Reference
  • Up to 500kHz Operation
  • Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

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Documentación técnica

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* Data sheet UCx84xA Current-Mode PWM Controller datasheet (Rev. H) PDF | HTML 11 oct 2024
* SMD UC1844A SMD 5962-86704 21 jun 2016
Application note UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 07 feb 2002
Application note DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 05 sep 1999
Application note DN-27 UC1842/UC1842A Family - Summary of Functional Differences 05 sep 1999
Application note DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 05 sep 1999
Application note DN-30 Programmable Electronic Circuit Breaker 05 sep 1999
Application note DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 05 sep 1999
Application note DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 05 sep 1999
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 05 sep 1999
Application note DN-65 Considerations in Powering BiCMOS ICs 05 sep 1999
Application note DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 05 sep 1999
Application note Modeling, Analysis and Compensation of the Current-Mode Converter 05 sep 1999
Application note U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control 05 sep 1999
Application note U-111, Practical Considerations in Current Mode Power Supplies 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

UCCx8C44 Unencrypted PSpice Transient Model

SLUM532.ZIP (5 KB) - PSpice Model
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
CDIP (JG) 8 Ultra Librarian
LCCC (FK) 20 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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