UCC2946PWG4

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PMIC (Power Management Integrated Circuit) devices are responsible for regulating power in a variety of applications. They provide our modern electronics with essential safety features, and come in a wide variety of configurations, sizes and styles. Within the PMIC world, Supervisors are circuits that monitor system voltages to ensure that the equipment is functioning properly. The UCC2946PWG4 is a Supervisor IC specifically designed for USB power switching applications.

The UCC2946PWG4 is a single-channel Power Supervisor IC intended to monitor and control system power in USB-powered systems. It detects a voltage drop in the system power rail and then either latches down (restricting further current flow) or cycles the system power, depending on its settings. This ensures that the system is always supplied with enough power and prevents a sudden power loss due to insufficient power rail voltage.

This particular supervisor IC is designed to be small, efficient, and reliable. It features a compact 4x4 mm QFN packaging that takes up minimal board space, and it requires only a single external capacitor for operation. Its rapid power-on reset allows for quick system startup, which is ideal for USB-powered applications. Additionally, the UCC2946PWG4 offers over-temperature protection, built-in ESD protection, and 2.4V tip fault protection.

In terms of operation, the UCC2946PWG4 relies on three primary inputs: Power Good (PGOOD), System Power (SPWR), and the Enable (EN) pin. When the system is powered up, the UCC2946PWG4 first checks the voltage on the system power rail. If the voltage is above the desired threshold, the UCC2946PWG4 will then activate the Switch Enable (SE) output, allowing the power switch to turn on. At the same time, it will also activate the PGOOD output to indicate that the system power rail voltage is healthy.

If the system power rail voltage falls below the threshold, the UCC2946PWG4 will execute one of two possible operations, depending on its settings. If the system is set to "latch down", the SE output will remain inactive, limiting the power switch in current. If the system is set to cycle, the UCC2946PWG4 will turn off the power switch and then wait for the power rail voltage to rise again before reactivating the SE pin and turning the power switch back on.

This device is incredibly versatile and can be used in a variety of USB-powered applications. It is well suited for controlling power in embedded systems, routers and switches, telecommunication equipment, and process control systems. It is also useful for applications where secure startup and reliable system power delivery is required, such as medical devices, hearing aids, and smart cards.

In conclusion, the UCC2946PWG4 is a highly-reliable and power-efficient supervisor IC designed for USB power switching applications. It features a compact QFN package, over-temperature protection, built-in ESD protection, and rapid power-on reset. By monitoring and controlling the system power rail voltage, the UCC2946PWG4 helps ensure that the system is always supplied with enough power and prevents a sudden power loss due to insufficient power rail voltage.

The specific data is subject to PDF, and the above content is for reference