SI3452B-B02-GMR

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

Power Over Ethernet (PoE) Controller technology is one of the most important applications fields of Power Management Integrated Circuit (PMIC) today. This technology allows for the delivery of both data and power over the same medium, thus allowing for the efficient use of network infrastructure. The SI3452B-B02-GMR is one of the PMICs used in PoE applications. It is a single chip solution offering a low power and high performance power management solution. In this article, we will discuss the application field and working principle of the SI3452B-B02-GMR.

Applications of the SI3452B-B02-GMR

The SI3452B-B02-GMR integrates a low standby current PWM controller, a dual-channel MOSFET driver and a buck converter into a single package. This makes it ideal for power over Ethernet (PoE) applications. This is because Ethernet switches and hubs commonly employ the differential signal protocol (802.3af) for power over Ethernet. The buck converter is designed to provide a low ripple and noise energy output from a wide input voltage range. The integrated PWM controller and dual-channel MOSFET driver enables the SI3452B-B02-GMR to provide an additional output filter that ensures a low output impedance and provides noise immunity against external electromagnetic interference (EMI).

The SI3452B-B02-GMR can be used for other power management applications, such as LCDs and LED illumination as well as mobile device charging applications. It is suitable for providing low frequency DC/DC conversion solutions with reduced external parts count, continuous conduction mode (CCM) operation, and extended operating temperature range.

Working Principle of the SI3452B-B02-GMR

The SI3452B-B02-GMR is based on a synchronous buck topology which provides high-efficiency conversion across a wide output voltage range. The synchronous buck topology allows for the power to flow from the input to the output without any losses, thanks to the use of a low RDS(ON) MOSFET combined with a high-efficiency current-mode control. The SI3452B-B02-GMR also features a wide frequency range and can be configured for low-ripple noise through its integrated over-voltage protection and short-circuit protection features. The integrated loop compensation provides quick and stable response while the internal temperature protection feature allows for the protection of the system’s components against thermal overload.

The SI3452B-B02-GMR also features a dual MOSFET driver with an adjustable turn on and turn off threshold. This helps prevent current and voltage spikes during the power-up cycle. The integrated PWM controller also allows for the reduction of power dissipation across various load conditions. This helps to ensure that the output power remains constant and improves the overall efficiency of the system.

In summary, the SI3452B-B02-GMR is an innovative PMIC solution designed for PoE applications. It offers a high level of integration, low-power operation, wide frequency range, and robust protection features making it ideal for powering Ethernet switches and hubs. Additionally, it can also be used for other power management applications such as LCDs, LED illumination, and mobile device charging.

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