Si3462 SINGLE-PORT IEEE 802.3AT POE/POE+ PSE INTERFACE Features Pin Assignments TM Short-circuit output fault IEEE 802.3at compliant PSE protection Autonomous operation requires no Si3462 LED status signal (detect, host processor interface power good, output fault) Complete reference design UNH Interoperability Test Lab available, including Si3462 controller 1 10 CLSMARK STATUS report available and schematic: 2 DC1 9 ISENSE Extended operating range Low-cost BOM VDD 3 8 GND RST (40 to +85 C) Compact PCB footprint DC2 4 7 VSENSE 11-Pin Quad Flat No-Lead (QFN) Operates directly from a +50 V package 5 6 CLSMODE DETA isolated supply Tiny 3x3 mm PCB footprint Supports up to 30 W maximum RoHS-compliant output power (Class 4) No-classify modes force power 11-pin QFN (3x3 mm) Robust 3-point detection algorithm Top ViewPads on bottom of package after valid detection eliminates false detection events IEEE-compliant disconnect Eliminates 10 BOM Inrush current control components Applications IEEE 802.3at endpoints and Set-top boxes midspans FTTH media converters Environment A and B PSEs Cable modem and DSL gateways Embedded PSEs Description The Si3462 is a single-port power management controller for IEEE 802.3at- compliant Power Sourcing Equipment (PSE). The Si3462 can be powered from a 50 V input using a shunt regulator, or, to save power, it can be powered from 50 V and 3.3 V power supplies. The IEEE-required Powered Device (PD) detection feature uses a robust 3-point algorithm to avoid false detection events. The Si3462 s reference design kit also provides full IEEE-compliant classification and PD disconnect. Intelligent protection circuitry includes input under-voltage lockout (UVLO), classification-based current limiting, and output short-circuit protection. The Si3462 is designed to operate completely independently of host processor control. An LED status signal is provided to indicate the port status, including detection, power good, and output fault event information. The Si3462 is pin-programmable to support four available power levels, endpoint and mid-span applications, and auto-retry or restart after disconnect functions. A comprehensive reference design kit is available (Si3462-EVB), including a complete schematic and bill of materials. The Si3462 also features no-classify modes, for circumstances where detection is desired but classification steps can be skipped. Example applications include dedicated, point-to-point connections for IP cameras, point-of-sale terminals, and wireless access points where the application power requirements are well understood. These modes allow elimination of classification-related components from the bill of materials. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice August 9, 2021 11 11 11 11Si3462 2 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice August 9, 2021