The UCC24650 is an easy-to-use secondary-side voltage monitor that periodically measures its own VDD voltage. A relative droop of 3% from the previous reading triggers a alert signal to a receiving primary-side regulation (PSR) controller. Its low-power consumption helps achieve <5-mW standby loss in many applications.
An internal 200-V MOSFET switch is applied across a ground-referenced rectifier to provide a current-limited pulse to the flyback transformer secondary winding, which couples the signal to the primary-side controller. This signal is repeated at 33 kHz until controller-driven switching activity is detected.
Relative-droop detection allows scaling to any voltage between 5 and 28 V. The alert function allows very-low standby frequency to minimize switching loss and reduction of output capacitance needed to respond to a heavy load step. This monitor is used with a controller capable of detecting the signal, such as the UCC28730 PSR flyback controller.
The UCC24650 also provides an enable and disable signal which can be used to control a secondary-side circuit during no-load conditions to reduce standby power loss. Such a circuit may be a synchronous rectifier controller or a relay driver, for example.
| Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | UCC24650 200-V Wake-Up Monitor for Fast Transient PSR datasheet | PDF | HTML | 04 feb 2015 |
| More literature | Achieving High Power Density and Ultra Low Standby Power in Flyback Converters | 23 mar 2021 | ||
| Technical article | Get smarter about ‘zero’ standby power in your next appliance design | PDF | HTML | 27 ago 2018 | |
| Application note | Rapid Transient Response With UCC28633 PSR-Flyback and UCC24650 Wake-Up Monitor | 27 feb 2015 | ||
| EVM User's guide | Using the UCC28730EVM-552 10-W Adaptor Module With PSR and Wake-Up Monitor | 06 feb 2015 |
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.
El módulo de evaluación UCC28730EVM-552 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) sin el uso de un acoplador óptico. El (...)
Utilice nuestra herramienta de selección de diseños de referencia para revisar e identificar los diseños que mejor se adaptan a su aplicación y parámetros.
| Paquete | Pasadores | Descargar |
|---|---|---|
| SOT-23 (DBV) | 5 | Ver opciones |
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 preguntas sobre la calidad, el paquete o el pedido de productos de TI, consulte el soporte de TI.