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SI3462-EVB 数据表(PDF) 1 Page - Silicon Laboratories |
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SI3462-EVB 数据表(HTML) 1 Page - Silicon Laboratories |
1 / 32 page Rev. 1.2 1/15 Copyright © 2015 by Silicon Laboratories Si3462-EVB Si3462-EVB Si3462 EVALUATION BOARD USER’S GUIDE 1. Introduction This document is intended to be used in conjunction with the Si3462 data sheet for designers interested in the following: An introduction to Power over Ethernet (PoE) and Power Sourcing Equipment (PSE) design considerations Operation of the Si3462 PSE controller in the Si3462-EVB reference design Configuration and operation of the Si3462-EVB 2. Overview of the Si3462 and Evaluation Board The Si3462 is a single-port power management controller for IEEE 802.3at PoE/PoE+ compliant Power Sourcing Equipment (PSE). The Si3462 operates directly from a 50 V (nominal) isolated input for PoE or 54 V (nominal) isolated input for PoE+. The complete Si3462 reference design (i.e., the Si3462-EVB) also provides full IEEE-compliant classification and detection as well as a robust disconnect algorithm. Intelligent protection circuitry includes input under-voltage and over-voltage lockout (UVLO/OVLO), current limiting, and output short-circuit protection. The Si3462 is designed to operate completely independently of host processor control. A reset button and an optional LED status signal are provided to indicate port status including detect, power good, and output fault event information. The Si3462 is pin-programmable to support: No classification mode reduces bill of materials for 15.4 W operation and also for non-standard powered devices that do not present a proper classification signature Endpoint and midspan applications with support for either 10/100BASE-T or 10/100/1000BASE-T All PoE/PoE+ classification power levels Classification-based current limiting Automatic or manual restart after various fault events are detected Figure 1. Typical Application Circuit (Example is for PoE; for PoE+, use +54 V nominal VIN) Si3462 GND DETA VDD +3.3 V VOUT 48 V PSE output (to port magnetics) RST VDD Detect & Mark ISENSE GND STATUS CLSMODE DC1 CLSMARK VSENSE DETECT FAULT PGOOD DC2 VIN +50 V GND + _ +50 V Classification & Gate drive Optional 3.3 V regulator |
类似零件编号 - SI3462-EVB |
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类似说明 - SI3462-EVB |
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