Inicio Gestión de la energía Convertidores de CA/CC y CC/CC (FET integrado)
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Gestión de la energía
Convertidores de CA/CC y CC/CC (FET integrado)
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UCG28826

PRESENTACIÓN PRELIMINAR

Convertidor de retorno QR de alta frecuencia con polarización propia y GaN integrado (65 W)

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UCG28826

PRESENTACIÓN PRELIMINAR
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Detalles del producto

Rating Catalog Operating temperature range (°C) -40 to 105 Topology Flyback Type Converter (Integrated Switch) Switching frequency (min) (kHz) 25 Switching frequency (max) (kHz) 500 Features Adjustable current limit, Auxless-sense, High-voltage startup, Integrated GaN FET, Over Current Protection, Over Temperature Protection, Over Voltage Protection, Self-bias, Short circuit protection, USB C/PD compatible, Under Voltage Protection, X-cap discharge EMI features Frequency Dithering, Switching slew rate control, Valley hopping Control mode Peak current mode Switch current limit (typ) (A) 3.5
Rating Catalog Operating temperature range (°C) -40 to 105 Topology Flyback Type Converter (Integrated Switch) Switching frequency (min) (kHz) 25 Switching frequency (max) (kHz) 500 Features Adjustable current limit, Auxless-sense, High-voltage startup, Integrated GaN FET, Over Current Protection, Over Temperature Protection, Over Voltage Protection, Self-bias, Short circuit protection, USB C/PD compatible, Under Voltage Protection, X-cap discharge EMI features Frequency Dithering, Switching slew rate control, Valley hopping Control mode Peak current mode Switch current limit (typ) (A) 3.5
VQFN (REZ) 12 25 mm² 5 x 5
  • Integrated 700V GaN with 170mΩ Rds(on)
  • Dynamic QR/DCM/CCM modes of operation
  • Support up to 500kHz switching frequency
  • Enable low BoM cost by integration
    • Remove auxiliary winding with self bias
    • Integrated input/output voltage sensing
    • Integrated current sense
    • Integrated HV startup
    • Integrated X-cap discharge
  • High efficiency and low EMI performance
    • Ultra-low standby power: <30mW
    • Frequency foldback and burst mode
    • Valley locking
    • Frequency dithering
    • Switching slew rate control
  • Comprehensive protection features
    • Over Temperature Protection
    • Over Voltage Protection
    • Short Circuit Protection
    • Cycle-by-cycle current limit
    • Two-Level Over Power Protection with LPS
    • Brown-in/out Protection
    • Open feedback protection
  • Flexible configurability via external resistors
    • X-cap discharge and CCM mode disable
    • Selectable switching slew rate
    • Multiple clamping frequency settings
    • Fault latch or auto-restart
    • Max/min peak current ratio
    • Dithering amplitude
  • Integrated 700V GaN with 170mΩ Rds(on)
  • Dynamic QR/DCM/CCM modes of operation
  • Support up to 500kHz switching frequency
  • Enable low BoM cost by integration
    • Remove auxiliary winding with self bias
    • Integrated input/output voltage sensing
    • Integrated current sense
    • Integrated HV startup
    • Integrated X-cap discharge
  • High efficiency and low EMI performance
    • Ultra-low standby power: <30mW
    • Frequency foldback and burst mode
    • Valley locking
    • Frequency dithering
    • Switching slew rate control
  • Comprehensive protection features
    • Over Temperature Protection
    • Over Voltage Protection
    • Short Circuit Protection
    • Cycle-by-cycle current limit
    • Two-Level Over Power Protection with LPS
    • Brown-in/out Protection
    • Open feedback protection
  • Flexible configurability via external resistors
    • X-cap discharge and CCM mode disable
    • Selectable switching slew rate
    • Multiple clamping frequency settings
    • Fault latch or auto-restart
    • Max/min peak current ratio
    • Dithering amplitude

UCG28826 is a high frequency, quasi-resonant flyback converter with built-in 170mΩ GaN high electron mobility transistor (HEMT) to convert AC to DC for up to 65W power converters. It is best suited for high power density applications such as cell phone fast chargers and laptop adapters. The key feature of this device is the self-bias and auxless sensing scheme which completely eliminates the need of the auxiliary winding and simplifies the system design with higher efficiency.

This device also features intelligent mode transition (CCM/QR/DCM) to enable high efficiency across wide power range and <30mW standby power consumption. In addition, UCG28826 includes a full list of protections such as brown-in/out protection, SCP, OVP, OLP, OFB and OTP. The cycle-by-cycle current limit ensures fast response to the fault conditions to safeguard the system and improve the reliability. The Input feedforward and output voltage based OLP correction are implemented to meet LPS requirements. Furthermore, the UCG28826 has dedicated configuration pins to offer more flexibility. Only resistors are needed to tune certain parameters for each system, enabling a platform design with a single device.

UCG28826 is a high frequency, quasi-resonant flyback converter with built-in 170mΩ GaN high electron mobility transistor (HEMT) to convert AC to DC for up to 65W power converters. It is best suited for high power density applications such as cell phone fast chargers and laptop adapters. The key feature of this device is the self-bias and auxless sensing scheme which completely eliminates the need of the auxiliary winding and simplifies the system design with higher efficiency.

This device also features intelligent mode transition (CCM/QR/DCM) to enable high efficiency across wide power range and <30mW standby power consumption. In addition, UCG28826 includes a full list of protections such as brown-in/out protection, SCP, OVP, OLP, OFB and OTP. The cycle-by-cycle current limit ensures fast response to the fault conditions to safeguard the system and improve the reliability. The Input feedforward and output voltage based OLP correction are implemented to meet LPS requirements. Furthermore, the UCG28826 has dedicated configuration pins to offer more flexibility. Only resistors are needed to tune certain parameters for each system, enabling a platform design with a single device.
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Documentación técnica

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* Data sheet UCG28826 Self-biased High Frequency QR Flyback Converter with Integrated GaN datasheet PDF | HTML 12 sep 2023
Technical article How an auxless GaN flyback converter can solve AC/DC adapter design challenges PDF | HTML 15 oct 2024
EVM User's guide Using the UCG28826EVM-093 65-W USB-C PD High-Density Quasi-Resonant flyback controller PDF | HTML 06 sep 2024

Diseño y desarrollo

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Placa de evaluación

UCG28826EVM-093 — Módulo de evaluación UCG28826

El UCG28826EVM-093 es un módulo de evaluación (EVM) USB-C® PD de 65 W para evaluar un adaptador de retorno cuasirresonante integrado de GaN fuera de línea para adaptadores de CA/CC, cargadores, tomas de pared USB y otras aplicaciones. El EVM cumple con los requisitos de eficiencia y energía de (...)

Guía del usuario: PDF | HTML
No disponible en TI.com
Diseños de referencia

PMP41145 — Diseño de referencia fuente de alimentación de 65 W, 20 V y 3.25 A con convertidor de retorno, entra

Este diseño de referencia es una fuente de alimentación CA/CC con una tensión de salida fija de 65 W y 20 V con convertidor retorno y nitruro de galio (GaN) integrados. Este diseño puede suministrar 65 W de plena potencia nominal a un rango que va de los 90 VCA a los 264 VCA y lograr una (...)
Test report: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VQFN (REZ) 12 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

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

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