計(jì)劃你的同步降壓轉(zhuǎn)換器通過PMBus接口

　　計(jì)劃你的同步降壓轉(zhuǎn)換器通過PMBus接口

　　ASIC和FPGA的應(yīng)用在現(xiàn)代數(shù)據(jù)中心的服務(wù)器和云計(jì)算系統(tǒng)需要高功率密度、高效率和快速的負(fù)載瞬態(tài)響應(yīng)的負(fù)載點(diǎn)（POL）降壓直流/直流轉(zhuǎn)換器。輸出電壓和電流，隨著故障的條件下，這些高度集成的，快速響應(yīng)的電壓轉(zhuǎn)換器模塊必須實(shí)時(shí)監(jiān)測。同時(shí)，對于適當(dāng)?shù)臒峁芾恚@些設(shè)備的外部溫度也必須實(shí)時(shí)監(jiān)測。如果這些設(shè)計(jì)義務(wù)是不夠的，以確保工程師的工作日，所需的輸出電壓變化需要編程，以盡量減少功耗。

　　為了滿足這些需求，德克薩斯儀器增加了新的高電流，非隔離降壓直流/直流轉(zhuǎn)換器與PMBus（一種電源管理總線的縮寫）接口迅速的家庭。同時(shí)提供高達(dá)30的輸出電流和開關(guān)頻率高，PMBus兼容的轉(zhuǎn)換器，tps544b20和tps544c20使設(shè)計(jì)人員配置和監(jiān)測其關(guān)鍵的設(shè)計(jì)參數(shù)，包括輸出電壓、電流和外部使用PMBus接口溫度。同樣，其中線性技術(shù)和Intersil，，也準(zhǔn)備大電流，輸出變量，降壓PMBus兼容的數(shù)字直流/直流轉(zhuǎn)換器。

　　PMBus essentials

　　Traditionally， in the analog world， DC/DC converters are programmed using external resistors and capacitors. However， today’s digital technology allows a designer to configure， monitor and control a power supply using signals via an interface like PMBus. It is an open-standard digital-power-management protocol managed by the System Management Interface Forum （SMIF）， which is also credited with developing the SMBus and Smart Battery standards. The PMBus-command language enables communication between components of a power system. It comprises standard and device-specific commands. The specifications were first released in March 2005 and several revisions have been introduced since then.