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UCC28750

ACTIVO

Controlador flyback en modo actual con regulación del lado secundario (SSR) para aplicaciones fuera

Detalles del producto

Operating temperature range (°C) -40 to 125 Control mode Current Topology Buck, Flyback Rating Catalog
Operating temperature range (°C) -40 to 125 Control mode Current Topology Buck, Flyback Rating Catalog
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Stable continuous conduction mode (CCM) operation with internal slope compensation
  • Fixed-frequency operation of 65kHz or 100kHz
  • Secondary-side regulation (SSR) with opto-coupler
  • Frequency foldback and burst mode for improved light-load efficiency
  • Frequency dithering for improved EMI performance
  • Gate source/sink capability: 300mA/500mA
  • Internal 4ms soft-start
  • Robust protection features:
    • Over-voltage and Under-voltage lockout
    • Output over-power protection (OPP)
    • Output short-circuit (OSC) protection
    • Output over-voltage (OVP) protection
    • Cycle-by-cycle peak over-current limit
    • External over-temperature, over-voltage protection (OTP, OVP) and brownout detection on FLT pin
    • Internal thermal shutdown
  • Stable continuous conduction mode (CCM) operation with internal slope compensation
  • Fixed-frequency operation of 65kHz or 100kHz
  • Secondary-side regulation (SSR) with opto-coupler
  • Frequency foldback and burst mode for improved light-load efficiency
  • Frequency dithering for improved EMI performance
  • Gate source/sink capability: 300mA/500mA
  • Internal 4ms soft-start
  • Robust protection features:
    • Over-voltage and Under-voltage lockout
    • Output over-power protection (OPP)
    • Output short-circuit (OSC) protection
    • Output over-voltage (OVP) protection
    • Cycle-by-cycle peak over-current limit
    • External over-temperature, over-voltage protection (OTP, OVP) and brownout detection on FLT pin
    • Internal thermal shutdown

UCC28750 is a highly-integrated current-mode, continuous-conduction-capable, PWM controller optimized for high performance, low standby power, and cost effective offline flyback converter applications using an opto-coupler. During light-load conditions the device enters frequency foldback and burst modes, improving light-load efficiency. The burst-mode algorithm used in UCC28750 controls the minimum effective switching frequency to prevent audible noise during light-load conditions. Frequency dithering improves EMI performance, and is active in normal, frequency foldback, and power boost operations.

UCC28750 provides protection features that enable a robust converter design with minimal external components. Output over-power protection (OPP) and cycle-by-cycle over-current limit protect the load and power-stage components from electrical stress. Over-voltage and under-voltage lockout (OVLO and UVLO) prevent switching in unwanted input conditions. The FLT pin provides line brown-out sensing and protection, or external over-temperature and over-voltage protection, depending on the device variant. The FLT pin is also used to disable the device through external control by pulling the pin to ground, regardless of the device variant.

UCC28750 is a highly-integrated current-mode, continuous-conduction-capable, PWM controller optimized for high performance, low standby power, and cost effective offline flyback converter applications using an opto-coupler. During light-load conditions the device enters frequency foldback and burst modes, improving light-load efficiency. The burst-mode algorithm used in UCC28750 controls the minimum effective switching frequency to prevent audible noise during light-load conditions. Frequency dithering improves EMI performance, and is active in normal, frequency foldback, and power boost operations.

UCC28750 provides protection features that enable a robust converter design with minimal external components. Output over-power protection (OPP) and cycle-by-cycle over-current limit protect the load and power-stage components from electrical stress. Over-voltage and under-voltage lockout (OVLO and UVLO) prevent switching in unwanted input conditions. The FLT pin provides line brown-out sensing and protection, or external over-temperature and over-voltage protection, depending on the device variant. The FLT pin is also used to disable the device through external control by pulling the pin to ground, regardless of the device variant.

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Documentación técnica

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Tipo Título Fecha
* Data sheet UCC28750 Current-Mode Flyback Controller with Secondary-Side Regulation (SSR) for Off-Line Applications datasheet PDF | HTML 01 abr 2022
Technical article Snubbing the flyback converter PDF | HTML 26 feb 2024
Technical article Considerations for auxiliary flyback power supplies PDF | HTML 29 ene 2024
Technical article Adding a single capacitor to improve cross-regulation in dual-output flyback power supplies PDF | HTML 21 dic 2023
Certificate UCC28750EVM-071 EU Declaration of Conformity (DoC) 20 nov 2023
EVM User's guide Using the UCC28750EVM-071 60-W AC to DC Converter Evaluation Module User's Guide PDF | HTML 15 nov 2023

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.

Placa de evaluación

UCC28750EVM-071 — Módulo de evaluación UCC28750 para controlador de retorno con modo de corriente

El UCC28750EVM-071 es un módulo de evaluación de 60 W para evaluar un convertidor de potencia de corriente alterna (AC) a corriente continua (DC) fuera de línea. El UCC28750EVM-071 está destinado a fines de evaluación y no pretende ser un producto final. El UCC28750EVM-071 convierte la tensión de (...)
Guía del usuario: PDF | HTML
Herramienta de cálculo

UCC28750-CALC Excel calculator tool for the UCC28750 Flyback controller

The UCC28750 Excel calculator helps build the schematic design and accelerate the design process.
Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores CA/CC y CC/CC (FET externo)
UCC28750 Controlador flyback en modo actual con regulación del lado secundario (SSR) para aplicaciones fuera
Herramienta de simulación

UCC28750-SIMPLIS UCC28750 Flyback Controller SIMPLIS Model

The UCC28750 SIMPLIS model helps build the schematic design and accelerates the design process.
Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores CA/CC y CC/CC (FET externo)
UCC28750 Controlador flyback en modo actual con regulación del lado secundario (SSR) para aplicaciones fuera
Diseños de referencia

PMP31288 — Diseño de referencia de reductor de lado alto no aislado con entrada de CA amplia de 7.8 W

The is an ultra wide input offline high-side buck power supply reference design that provides an 13V output at a maximum of 0.6A. The input accepts a voltage range of 85 VAC to 485 VAC. The reference design uses the UCC28750 current-mode flyback controller with opto-coupler feedback. The design is (...)
Test report: PDF
Paquete Pasadores Descargar
SOT-23 (DBV) 6 Ver opciones

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

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