Inicio Administración de potencia Controladores CA/CC y CC/CC (FET externo)
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Administración de potencia
Controladores CA/CC y CC/CC (FET externo)

UCC28700

ACTIVO

PWM de tensión y corriente constantes con PSR y compensación de cable programable

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UCC28700

ACTIVO
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Detalles del producto

Rating Catalog Topology Buck, Flyback Iout (max) (A) 5 Vin (max) (V) 450 Vin (min) (V) 21 Vout (max) (V) 54 Vout (min) (V) 3.3 Control mode Primary-side regulation Features CC/CV output regulation, Cable compensation, Current limiting, DCM, Leading edge blanking, Low power, Overcurrent protection, Primary-side regulated, Quasi-Resonant, Soft start, Valley switching Operating temperature range (°C) -20 to 125 Iq (typ) (µA) 2000 Duty cycle (max) (%) 99
Rating Catalog Topology Buck, Flyback Iout (max) (A) 5 Vin (max) (V) 450 Vin (min) (V) 21 Vout (max) (V) 54 Vout (min) (V) 3.3 Control mode Primary-side regulation Features CC/CV output regulation, Cable compensation, Current limiting, DCM, Leading edge blanking, Low power, Overcurrent protection, Primary-side regulated, Quasi-Resonant, Soft start, Valley switching Operating temperature range (°C) -20 to 125 Iq (typ) (µA) 2000 Duty cycle (max) (%) 99
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • < 30-mW No-Load Power for 5-Star Rating
  • Primary-Side Regulation (PSR) Eliminates Opto-Coupler
  • ±5% Voltage and Current Regulation
  • 130-kHz Maximum Switching Frequency Enables High-Power
    Density Charger Designs
  • Quasi-Resonant Valley-Switching Operation for Highest
    Overall Efficiency
  • Patent-Pending Frequency-Jitter Scheme to Ease EMI
    Compliance
  • Wide VDD Range Allows Small Bias Capacitor
  • Clamped Gate-Drive Output for MOSFET
  • Protection Functions: Overvoltage, Low-Line, and
    Overcurrent
  • Programmable Cable Compensation (UCC28700 Only)
  • NTC Resistor Interface (UCC28701, UCC28702 and UCC28703
    Only) With Fixed Cable Compensation Options
  • SOT-23 Package
  • < 30-mW No-Load Power for 5-Star Rating
  • Primary-Side Regulation (PSR) Eliminates Opto-Coupler
  • ±5% Voltage and Current Regulation
  • 130-kHz Maximum Switching Frequency Enables High-Power
    Density Charger Designs
  • Quasi-Resonant Valley-Switching Operation for Highest
    Overall Efficiency
  • Patent-Pending Frequency-Jitter Scheme to Ease EMI
    Compliance
  • Wide VDD Range Allows Small Bias Capacitor
  • Clamped Gate-Drive Output for MOSFET
  • Protection Functions: Overvoltage, Low-Line, and
    Overcurrent
  • Programmable Cable Compensation (UCC28700 Only)
  • NTC Resistor Interface (UCC28701, UCC28702 and UCC28703
    Only) With Fixed Cable Compensation Options
  • SOT-23 Package

The UCC28700 family of flyback power supply controllers provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Low start-up current, dynamically controlled operating states and a tailored modulation profile support very low standby power without sacrificing start-up time or output transient response.

Control algorithms in the UCC28700 family allow operating efficiencies to meet or exceed applicable standards. The output drive 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 controllers have a maximum switching frequency of 130 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28700 allows the level of cable compensation to be programmed. The UCC28701, UCC28702, and UCC28703 devices allow remote temperature sensing using a Negative Temperature Coefficient (NTC) resistor while providing fixed cable-compensation levels.

The UCC28700 family of flyback power supply controllers provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Low start-up current, dynamically controlled operating states and a tailored modulation profile support very low standby power without sacrificing start-up time or output transient response.

Control algorithms in the UCC28700 family allow operating efficiencies to meet or exceed applicable standards. The output drive 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 controllers have a maximum switching frequency of 130 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28700 allows the level of cable compensation to be programmed. The UCC28701, UCC28702, and UCC28703 devices allow remote temperature sensing using a Negative Temperature Coefficient (NTC) resistor while providing fixed cable-compensation levels.
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Documentación técnica

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* Data sheet UCC2870x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation datasheet (Rev. A) PDF | HTML 12 dic 2014
Application note Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips PDF | HTML 31 ago 2021
Application note L1 and L2 EV Charger Electric Vehicle Service Equipment Design Considerations (Rev. B) 09 jun 2021
Application note Minimize Standby Consumption for UCC287XX Family 01 ago 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
Technical article Making a solar inverter more reliable than the sun PDF | HTML 01 ago 2017
Technical article Common challenges when choosing the auxiliary power supply for your Server PSU PDF | HTML 20 mar 2017
Application note Troubleshooting TI PSR controllers 03 oct 2016
Technical article USB Wall Chargers: Conveniences and Challenges PDF | HTML 06 oct 2015
White paper Control Challenges for Low Power AC/DC Converters 02 oct 2015
White paper Control Challenges for Low Power AC/DC Converters (PPT) 02 oct 2015
Technical article Designing multiple output converters with primary side sensing PDF | HTML 04 ago 2015
Application note Analysis of Starting Up Performance for UCC28700 11 mar 2014
Application note UCC28700 5-W USB Flyback Design Review (Rev. C) 21 feb 2014
More literature Exposing the Inner Behavior of a Quasi-Resonant Flyback Converter 29 oct 2013

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

UCC28700EVM-068 — Módulo de evaluación UCC28700

The Texas Instruments UCC28700EVM-068 evaluation module (EVM) helps designers evaluate the performance of the UCC28700 Constant-Voltage, Constant-Current PWM with Primary-Side Regulation. The 5W EVM is used for evaluating an off line adapter for USB applications. It converts a 90V to 265V RMS (...)
Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

UCC28711EVM-160 — Módulo de evaluación UCC28711

The Texas Instruments UCC28711EVM-160 evaluation module (EVM) helps designers evaluate the performance of the UCC28711 Constant-Voltage, Constant-Current PWM with Primary-Side Regulation. The 5W EVM is used for evaluating an off line adapter for USB applications. It converts a 90V to 265V RMS (...)
Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

UCC28720EVM-212 — Módulo de evaluación UCC28720EVM-212 para adaptador USB fuera de línea de 5 W

The UCC28720EVM-212 is a 5W evaluation module for evaluating an off line adapter for USB applications. It is intended for evaluation purposes and is not intended to be an end product. The UCC28720EVM-212 converters 100V to 240V RMS input voltage down to 5V DC, with a 1A current limit for USB (...)
Guía del usuario: PDF
No disponible en TI.com
Modelo de simulación

UCC2870x PSPICE Transient Model

SLUM455.ZIP (131 KB) - PSpice Model
Descargar
Modelo de simulación

UCC2870x TINA-TI Transient Reference Design

SLUM619.TSC (195 KB) - TINA-TI Reference Design
Descargar
Modelo de simulación

UCC2870x TINA-TI Transient Spice Model

SLUM617.ZIP (101 KB) - TINA-TI Spice Model
Descargar
Herramienta de cálculo

SLUC381 — MathCAD Design Tool

Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores CA/CC y CC/CC (FET externo)
UCC28700 — PWM de tensión y corriente constantes con PSR y compensación de cable programable UCC28700-Q1 — Controlador PWM de regulación de lado primario compacto y calidad automotriz UCC28701 — PWM de tensión y corriente constantes con PSR, opción NTC y compensación de cable de 0 mV UCC28702 — PWM de tensión y corriente constantes con PSR, opción NTC y compensación de cable de 150 mV UCC28703 — PWM de tensión y corriente constantes con PSR, opción NTC y compensación de cable de 300 mV
Descargar
Herramienta de cálculo

SLUC408 — UCC28700 Excel 97 Design Tool

Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores CA/CC y CC/CC (FET externo)
UCC28700 — PWM de tensión y corriente constantes con PSR y compensación de cable programable UCC28700-Q1 — Controlador PWM de regulación de lado primario compacto y calidad automotriz UCC28701 — PWM de tensión y corriente constantes con PSR, opción NTC y compensación de cable de 0 mV UCC28702 — PWM de tensión y corriente constantes con PSR, opción NTC y compensación de cable de 150 mV UCC28703 — PWM de tensión y corriente constantes con PSR, opción NTC y compensación de cable de 300 mV
Descargar

Muchos diseños de referencia de TI incluyen UCC28700

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

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

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