Herramienta de cálculo
UCC28720
Controlador de corriente y tensión constantes con regulación del lado primario para dispositivos de
Hoja de datos
UCC28720
- < 10-mW No-Load Power
- Primary-Side Regulation (PSR) Eliminates Opto-
Coupler - ±5% Voltage and Current Regulation Across Line
and Load - 700-V Start-Up Switch
- 80-kHz Maximum Switching Frequency Enables
High-Power Density Charger Designs - Quasi-Resonant Valley-Switching Operation for
Highest Overall Efficiency - Wide VDD Range Allows Small Bias Capacitor
- Dynamic BJT Drive
- Overvoltage, Low-Line, and Overcurrent
Protection Functions - Programmable Cable Compensation
- SOIC-7 Package
The UCC28720 flyback power supply controller provides isolated-output 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.
An internal 700-V start-up switch, dynamically-controlled operating states and a tailored modulation profile support ultra-low standby power without sacrificing start-up time or output transient response.
Control algorithms in the UCC28720 allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a bipolar transistor 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 80 kHz and always maintains control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28720 allows compensation for voltage drop in the cable to be programmed with an external resistor.
Documentación técnica
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Ver todo 10 | Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | UCC28720 Constant-Voltage, Constant-Current Controller With Primary-Side Regulation datasheet (Rev. B) | PDF | HTML | 30 sep 2015 |
| Application note | Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips | PDF | HTML | 31 ago 2021 | |
| Application note | Minimize Standby Consumption for UCC287XX Family | 01 ago 2019 | ||
| Application note | Maximum Output Power and Thermal Considerations for UCC28720 and UCC28722 | 06 dic 2017 | ||
| Application note | Troubleshooting TI PSR controllers | 03 oct 2016 | ||
| Technical article | Slim down your flyback; lose that excess snubber | PDF | HTML | 15 feb 2016 | |
| 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 | 5-W USB Flyback Design Example Using the UCC28722 | 08 ene 2014 |
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
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
Herramienta de cálculo
SLUC529 — UCC28722 Excel Design Tool
Productos y hardware compatibles
Diseños de referencia
PMP9622 — Diseño de referencia de puente completo con desplazamiento de fase de tensión constante-corriente co
This reference design uses the UCC3895 Phase-Shifted Full Bridge controller to implement a high efficiency, 120VAC input to 44Vdc up to 8A output. The power supply is set up to be constant voltage-constant current. The voltage and current are set by fixed resistor values and could (...)
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| SOIC (D) | 7 | Ultra Librarian |
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
Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.
Soporte y capacitación
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