基于POWR1220AT8設計的12V熱插拔技術

作者：時間：2010-06-22 來源：網(wǎng)絡

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ispPAC-POWR1220AT8集成了在系統(tǒng)可編程邏輯和在系統(tǒng)可編程模擬功能,是通用的電源監(jiān)視器,順序和余量控制器,它提供12個單獨的模擬輸入通道,用來監(jiān)視多達12個電源測試點. POWR1220AT8提供和IPMC標準的命令接口,能把板上的DC/DC轉換器轉換成精密的數(shù)控電源.本文介紹了ispPAC-POWR1220AT8主要特性,方框圖,以及應用方框圖, 評估板外形圖,采用ispPAC-POWR1220AT8的12V熱插拔控制器參考設計電路圖.

ispPAC-POWR1220AT8典型應用:

The Power Manager II POWR1220AT8 provides a standard command interface to the IPMC while performing FRU specific payload power management functions using the on-chip CPLD. The POWR1220AT8 also converts all on board DC-DC converters into accurate digitally controlled supplies.

圖1.ispPAC-POWR1220AT8方框圖

圖2.ispPAC-POWR1220AT8應用方框圖

圖3.ispPAC-POWR1220AT8提高DC/DC轉換器精度的應用方框圖

The PAC-POWR1220AT8 evaluation board allows the designer to quickly configure and evaluate the ispPAC-POWR1220AT8 device on a fully assembled printed-circuit board. The four-layer board supports a 100-pin TQFP package, pads for user I/O, a JTAG programming cable connector, and a connector for the device’s I2C interface. JTAG programming signals can be generated by using an ispDOWNLOAD® programming cable connected between the evaluation board and a PC. Both analog and digital features of the ispPACPOWR1220AT8 device can be easily configured using PAC-Designer® software.

The PAC-POWR1220AT8 evaluation board is available in a Development Kit that includes:

PAC-POWR1220AT8 Evaluation Board

ispDOWNLOAD Cable

AC Adapter (International plugs)

User Documentation

圖4.ispPAC-POWR1220AT8評估板外形圖

采用ispPAC-POWR1220AT8的12V熱插拔控制器參考設計

A hot swap controller is used to limit the inrush current when a circuit board is plugged into a powered backplane.

In addition, a hot swap controller may offer some or all of the following features: over-current protection (electronic circuit breaker), over-voltage protection, and under-voltage protection. Hot swap controllers are also required to isolate the board from the backplane which is useful in troubleshooting, maintenance, and upgrade activities. The power-down request may come from the backplane (remote) or an on-board switch (manual).

This document describes how a Lattice Power Manager II ispPAC®-POWR1220AT8 can be used to implement the functions required for 12V hot swap applications. This reference design is targeted to operate on the Power Manager Hercules Development Kit (PAC-POWR1220AT8-HS-EVN C Standard or PAC-POWR1220AT8-HA-EVN CAdvanced).