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UCC28740

ACTIVO

Controlador de retorno de corriente y tensión constantes (CVCC) con regulación del lado secundari

Detalles del producto

Topology Flyback Control mode Secondary-side regulation Features Current limiting, DCM, High-voltage startup, Light load efficiency, Overcurrent protection, Overvoltage protection, Quasi-Resonant, Secondary-side regulated, Soft start, USB C/PD compatible, Valley switching Sector Robotics, Test & measurement
Topology Flyback Control mode Secondary-side regulation Features Current limiting, DCM, High-voltage startup, Light load efficiency, Overcurrent protection, Overvoltage protection, Quasi-Resonant, Secondary-side regulated, Soft start, USB C/PD compatible, Valley switching Sector Robotics, Test & measurement
SOIC (D) 7 29.4 mm² (4.9 mm × 6 mm)
  • Less than 10-mW No-Load Power Capability
  • Optocoupled Feedback for CV, and
    Primary-Side Regulation (PSR) for CC
  • Enables ±1% Voltage Regulation and ±5% Current Regulation Across Line and Load
  • 700-V Startup Switch
  • 100-kHz Maximum Switching Frequency Enables High-Power-Density Charger Designs
  • Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency
  • Frequency Dithering to Ease EMI Compliance
  • Clamped Gate-Drive Output for MOSFET
  • Overvoltage, Low-Line, and Overcurrent Protection Functions
  • SOIC-7 Package
  • Create a Custom Design Using the UCC28740 With the WEBENCH® Power Designer
  • Less than 10-mW No-Load Power Capability
  • Optocoupled Feedback for CV, and
    Primary-Side Regulation (PSR) for CC
  • Enables ±1% Voltage Regulation and ±5% Current Regulation Across Line and Load
  • 700-V Startup Switch
  • 100-kHz Maximum Switching Frequency Enables High-Power-Density Charger Designs
  • Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency
  • Frequency Dithering to Ease EMI Compliance
  • Clamped Gate-Drive Output for MOSFET
  • Overvoltage, Low-Line, and Overcurrent Protection Functions
  • SOIC-7 Package
  • Create a Custom Design Using the UCC28740 With the WEBENCH® Power Designer

The UCC28740 isolated-flyback power-supply controller provides Constant-Voltage (CV) using an optical coupler to improve transient response to large-load steps. Constant-Current (CC) regulation is accomplished through Primary-Side Regulation (PSR) techniques. This device processes information from opto-coupled feedback and an auxiliary flyback winding for precise high-performance control of output voltage and current.

An internal 700-V startup switch, dynamically controlled operating states, and a tailored modulation profile support ultra-low standby power without sacrificing startup time or output transient response.

Control algorithms in the UCC28740 allow operating efficiencies to meet or exceed applicable standards. The drive output interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley-switching reduces switching losses. Modulation of switching frequency and primary current-peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controller has a maximum switching frequency of 100 kHz and always maintains control of the peak-primary current in the transformer. Protection features keep primary and secondary component stresses in check. A minimum switching frequency of 170 Hz facilitates the achievement of less than 10-mW no-load power.

The UCC28740 isolated-flyback power-supply controller provides Constant-Voltage (CV) using an optical coupler to improve transient response to large-load steps. Constant-Current (CC) regulation is accomplished through Primary-Side Regulation (PSR) techniques. This device processes information from opto-coupled feedback and an auxiliary flyback winding for precise high-performance control of output voltage and current.

An internal 700-V startup switch, dynamically controlled operating states, and a tailored modulation profile support ultra-low standby power without sacrificing startup time or output transient response.

Control algorithms in the UCC28740 allow operating efficiencies to meet or exceed applicable standards. The drive output interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley-switching reduces switching losses. Modulation of switching frequency and primary current-peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controller has a maximum switching frequency of 100 kHz and always maintains control of the peak-primary current in the transformer. Protection features keep primary and secondary component stresses in check. A minimum switching frequency of 170 Hz facilitates the achievement of less than 10-mW no-load power.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos UCC28740 Constant-Voltage Constant-Current Flyback Controller Using Optocoupled Feedback datasheet (Rev. D) PDF | HTML 23/03/2018
Artículo técnico How to design a limited power source industrial AC/DC power supply with minimal components – part 1 PDF | HTML 11/01/2024
Application brief Flyback Selection Guide PDF | HTML 23/06/2022
Product overview CCS-Compliant EV Service Equipment Reference Design for Level 1 and 2 EV Charger 16/06/2022
Nota sobre la aplicación Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips PDF | HTML 31/08/2021
Nota sobre la aplicación Practical Feedback Loop Design Considerations for Flyback Converter Using PDF | HTML 20/05/2020
Nota sobre la aplicación Minimize Standby Consumption for UCC287XX Family 1/08/2019
Artículo técnico Choosing the right flyback controller for your design PDF | HTML 24/08/2018
Nota sobre la aplicación Selecting Electrolitic Bus Capacitor for Universal Input 17/07/2018
Artículo técnico How to minimize time to market in your USB Type-C™ and USB Power Delivery designs PDF | HTML 26/03/2018
Artículo técnico Brush up on the latest motor design considerations for appliances PDF | HTML 26/10/2017
Artículo técnico Powering the IoT PDF | HTML 26/01/2017
Artículo técnico How to design a limited power source industrial AC/DC power supply - part 2 PDF | HTML 26/10/2016
Analog Design Journal Agency requirements for stand-by power consumption w/ offline and PoL converters 26/01/2016
Informe Control Challenges for Low Power AC/DC Converters 2/10/2015
Informe Control Challenges for Low Power AC/DC Converters (PPT) 2/10/2015

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

UCC24630EVM-636 — UCC24630: Adaptador CA/CC de 65 W

Este diseño AC/CC de 65 W de alta eficiencia utiliza el controlador de rectificación sincrónica UCC24630 y admite una entrada universal de 85 Vac a 265 Vac. Proporciona una salida de 19.5 V a 3.33 A y supera los requisitos de rendimiento CoC-5 Nivel 2 y DOE Nivel VI para fuentes de alimentación (...)

Guía del usuario: PDF
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Placa de evaluación

UCC28740EVM-525 — Módulo de evaluación UCC28740EVM-525

El módulo de evaluación UCC28740EVM-525 es un convertidor de retorno en modo discontinuo (DCM) fuera de línea de 10 W que proporciona regulación de salida de tensión constante (CV) y corriente constante (CC). Utiliza retroalimentación del acoplador óptico para una regulación ajustada de la tensión (...)

Guía del usuario: PDF
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Modelo de simulación

UCC28740 SIMPLIS Transient Model (Rev. A)

SLUM672A.ZIP (122 KB) - Modelo SIMPLIS
Productos y hardware compatibles
Herramienta de cálculo

SLUC487 — UCC28740 Design Calculator

Productos y hardware compatibles

Muchos diseños de referencia de TI incluyen UCC28740

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Pedidos y calidad

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