高整合度四通道下橋開關提升工業自動化效率

作者 : STMicroelectronics

意法半導體(ST)的IPS4260L四通道下橋智慧功率開關可提升工業自動化設備的效率和可靠性,在節省空間的散熱加強型封裝內整合四個260mΩTYP RDS(ON)的功率開關和保護功能…

意法半導體(STMicroelectronics,ST)的IPS4260L四通道下橋智慧功率開關可提升工業自動化設備的效率和可靠性,在一個節省空間的散熱加強型封裝內整合四個260mΩTYP RDS(ON)的功率開關和保護功能,在TAMB = 85°C環境溫度下最大輸出電流2.4A (每通道0.6A或單通道2.4A),可透過外部電阻器設定限流閾值,還可並連通道。

極小的電壓上升時間和下降時間(tr,tf < 1μs)值,以及高開關頻率(高達250kHz),使IPS4260L非常適用於伺服驅動器、馬達控制、工業PC週邊、可程式設計邏輯控制器(PLC)和通用下橋開關(驅動與正電源相連的負載)。此外,IPS4260L還為智慧工業/工業4.0智慧製造應用帶來豐富的診斷功能。

診斷功能包括開路負載檢測和限流保護。開路負載檢測在輸出處於關斷狀態時運行,以防止因為線路斷開等故障導致的危險。當電流過大時,非耗散式截止限流功能可在使用者設定的時間後關閉輸出級。限流時長可以用一個外部電阻器來設定,限流時間結束後,輸出級自動重啟。

為了確保在驅動桿性負載(例如馬達)時仍能快速響應,新功率開關整合了一個智慧架構,可實現四條通道共用一個外部鉗位二極體的快速退磁功能。

其他診斷功能包括兩個用於指示負載開路和超載/熱關斷的共開路汲極針腳,以及用於指示單個通道超載/熱關斷的四個輸入/輸出汲極針腳。

身為意法半導體智慧功率開關產品大家族的一員,IPS4260L獲得廣泛生態系統的支援,包括產品配置專用圖形化使用者介面軟體(STSW-IFP029GUI)、內容詳盡的使用者手冊(UM2297)以及技術先進的STEVAL-IFP029V1評估板。其中,評估板的安全性符合國際工業設備安全標準,在邏輯電路和功率級之間有絕緣保護,亦有極性接反保護,而且電磁相容性符合EMC規定和IEC61000-4規範要求。

IPS4260L現已量產,其採用小型化HTSSOP20封裝(散熱強化的薄的縮小型小外廓封裝)。

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