Si3462

Rev. 1.0

11

4. Si3462-EVB Functional Description

In combination with low-cost external components, the Si3462 controller provides a complete PSE solution for

embedded PoE applications. The Si3462-EVB reference design operates from a +50 V isolated power supply and

delivers power to the powered device.

Refer to the Si3462-EVB User's Guide and schematics for descriptions in the following sections.

The basic sequence of applying power is shown in Figure 3. Following is the description of the function that must

be performed in each phase.

Figure 3. Basic Power-up Sequence

-2.8V

-15.5V

-10V

-20.5V

-44V

-57V

Ch1: PoE output voltage referenced to the +50V rail

Detection

Classification

Power-on