Inicio Administración de potencia Reguladores de conmutación CA/CC Controladores de CA/CC

UCC28704

ACTIVO

Controlador de retorno de CV y CC fuera de línea de alta eficiencia con regulación del lado prima

Detalles del producto

Topology Buck, Flyback Control mode Primary-side regulation Features CC/CV output regulation, Cable compensation, DCM, NTC resistor interface, Primary-side regulated, Quasi-Resonant, Soft start, Valley switching Duty cycle (max) (%) 99
Topology Buck, Flyback Control mode Primary-side regulation Features CC/CV output regulation, Cable compensation, DCM, NTC resistor interface, Primary-side regulated, Quasi-Resonant, Soft start, Valley switching Duty cycle (max) (%) 99
SOT-23 (DBV) 6 8.12 mm² (2.9 mm × 2.8 mm)
  • Efficiency Performance Exceeds DoE Level VI and EU CoC V5 Tier-2 External Power Supply Standards
  • Primary-Side Regulation Eliminates Opto-Coupler and Secondary Feedback Components
  • Compatible with Synchronous Rectifier
  • Enables <30-mW No-Load Input Power
  • ±5% Output Voltage (CV) and Current (CC) Regulation
  • Enhanced Dynamic Load Response
  • Constant Current Output Under-Voltage Protection (CCUV) with Auto-Restart Response
  • Cable Compensation (300 mV at 5-V Full Load)
  • 85-kHz Maximum Switching Frequency
  • DCM Valley-Switching Operation
  • Clamped Gate-Drive Output for MOSFET
  • NTC Resistor Interface
  • Resistor or External HV Depletion-Mode FET Start-Up
  • Fault Protections: Input Low Line, Output Over-Voltage, Over-Current, and Short-Circuit
  • SOT23-6 Package
  • Efficiency Performance Exceeds DoE Level VI and EU CoC V5 Tier-2 External Power Supply Standards
  • Primary-Side Regulation Eliminates Opto-Coupler and Secondary Feedback Components
  • Compatible with Synchronous Rectifier
  • Enables <30-mW No-Load Input Power
  • ±5% Output Voltage (CV) and Current (CC) Regulation
  • Enhanced Dynamic Load Response
  • Constant Current Output Under-Voltage Protection (CCUV) with Auto-Restart Response
  • Cable Compensation (300 mV at 5-V Full Load)
  • 85-kHz Maximum Switching Frequency
  • DCM Valley-Switching Operation
  • Clamped Gate-Drive Output for MOSFET
  • NTC Resistor Interface
  • Resistor or External HV Depletion-Mode FET Start-Up
  • Fault Protections: Input Low Line, Output Over-Voltage, Over-Current, and Short-Circuit
  • SOT23-6 Package

The UCC28704 Off-line flyback controller is a highly integrated, 6-pin primary-side regulated PWM controller for designing high efficiency AC-to-DC power supplies with low standby power consumption to comply with global efficiency standards. The controller has ultra-low current consumption at start-up to enable designs with <30-mW no-load input power and save standby mode energy consumption. Intelligent primary-side sensing and control enables 5% output voltage and current control without using an opto coupler or secondary-side feedback circuits.

UCC28704 incorporates an enhanced load transient response technique which helps minimize the output capacitor, reducing the overall system size and cost. The controller also eliminates the need for loop compensation components which simplify the design and debugging process for power supply designers. The converter output voltage and current is regulated to prevent overstress conditions that may damage the load or connectors. Similarly, the CCUV shutdown feature monitors for an output under voltage fault to protect connectors from over heat or burn out from soft shorts, which greatly enhance overall system reliability. Board or component over temperature protection is facilitated with an NTC interface pin.

UCC28704 can be readily used with TI secondary-side synchronous rectifier (SR) controllers at 2-A or higher output current levels for higher conversion efficiency or more compact designs.

For all available packages, see the orderable addendum at the end of the datasheet.

The UCC28704 Off-line flyback controller is a highly integrated, 6-pin primary-side regulated PWM controller for designing high efficiency AC-to-DC power supplies with low standby power consumption to comply with global efficiency standards. The controller has ultra-low current consumption at start-up to enable designs with <30-mW no-load input power and save standby mode energy consumption. Intelligent primary-side sensing and control enables 5% output voltage and current control without using an opto coupler or secondary-side feedback circuits.

UCC28704 incorporates an enhanced load transient response technique which helps minimize the output capacitor, reducing the overall system size and cost. The controller also eliminates the need for loop compensation components which simplify the design and debugging process for power supply designers. The converter output voltage and current is regulated to prevent overstress conditions that may damage the load or connectors. Similarly, the CCUV shutdown feature monitors for an output under voltage fault to protect connectors from over heat or burn out from soft shorts, which greatly enhance overall system reliability. Board or component over temperature protection is facilitated with an NTC interface pin.

UCC28704 can be readily used with TI secondary-side synchronous rectifier (SR) controllers at 2-A or higher output current levels for higher conversion efficiency or more compact designs.

For all available packages, see the orderable addendum at the end of the datasheet.

Descargar Ver vídeo con transcripción Video

Productos similares que pueden interesarle

open-in-new Comparar alternativas
Misma funcionalidad con diferente configuración de pines que el dispositivo comparado
UCC28700 ACTIVO PWM de tensión y corriente constantes con PSR y compensación de cable programable The UCC28700 adds cable compensation

Documentación técnica

No se encontraron resultados. Borre su búsqueda y vuelva a intentarlo.
Ver todo 15
Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos UCC28704 High-Efficiency Off-Line CV and CC Flyback Controller with Primary-Side Regulation (PSR) datasheet (Rev. A) PDF | HTML 17/02/2016
Informe Floating Ground Hot-Swap Architecture to Enable Robust Protection on 800V or ±400V DC Power Distribution PDF | HTML 10/03/2026
Artículo técnico Snubbing the flyback converter PDF | HTML 26/02/2024
Application brief Flyback Selection Guide PDF | HTML 23/06/2022
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 Minimize Standby Consumption for UCC287XX Family 1/08/2019
Nota sobre la aplicación Selecting Electrolitic Bus Capacitor for Universal Input 17/07/2018
Artículo técnico Making a solar inverter more reliable than the sun PDF | HTML 1/08/2017
Artículo técnico Powering the IoT PDF | HTML 26/01/2017
Nota sobre la aplicación Design UCC28704 With UCC24636 (PSR+SR) 12/01/2017
Artículo técnico Biasing an SR controller IC in USB smartphone charging applications PDF | HTML 8/12/2016
Artículo técnico USB Type-C: charging a new world PDF | HTML 4/10/2016
Nota sobre la aplicación Troubleshooting TI PSR controllers 3/10/2016
Artículo técnico USB chargers then and now: Type-C meets energy efficiency standards PDF | HTML 23/09/2016
Artículo técnico Keeping up with the standards: Efficiency and standby power requirements PDF | HTML 12/05/2016

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

UCC28704EVM-724 — Módulo de evaluación UCC28704 de fuente de alimentación fuera de línea de 5 V/10 W con PSR para adap

El UCC28704EVM-724 es una fuente de alimentación aislada fuera de línea de 10 W que proporciona salida 5 V en un puerto USB-A. La tensión y la corriente de salida del convertidor se regulan con precisión del 5 % sin utilizar un optoacoplador ni circuitos de retroalimentación del lado secundario. El (...)

Guía del usuario: PDF
Productos y hardware compatibles
En inventario
Límite:
??asset.out-of-stock-ti_es_MX??
No disponible
Modelo de simulación

UCC28704 PSpice Transient Model

SLUM541.ZIP (88 KB) - Modelo PSpice
Productos y hardware compatibles
Herramienta de cálculo

SLUC603 — UCC28704 Excel Design Calculator

Productos y hardware compatibles
Herramienta de cálculo

SLUC605 — UCC28704 MathCad Design Calculator

Productos y hardware compatibles

Muchos diseños de referencia de TI incluyen UCC28704

Utilice nuestra herramienta de selección de diseños de referencia para revisar e identificar los diseños que mejor se adaptan a su aplicación y parámetros.

Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOT-23 (DBV) 6 Ultra Librarian

Pedidos y calidad

Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.

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.

Si tiene alguna pregunta sobre calidad, encapsulados o pedido de productos de TI, consulte el servicio de asistencia de TI. ​​​​​​​​​​​​​​

Videos