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STL6800
STL6800系列是一款具有先進閉迴路控制的BLDC風扇控制器,旋轉速度變化範圍在±5%以內。內建的軟開關和先進的定時控制提高電機效率及減少振動。STL6800支援直接的PWM輸入,不需要PWM到DC轉換的電路,從而減少外部元件數量。友好的程式設計介面可以調整任何風扇曲線設置。該設備提供可調的PWM輸出頻率,以支持單相全波驅動電動機線圈。 STL6800 擁有軟啟動功能,具有可編程的增量佔空比,以抑制線圈電流的啟動尖峰,並且可以減少啟動噪音和降低功耗。內建的軟開關功能可以減少聲學噪音和功率損耗。該設備通過內部參考電壓提供限流功能。該設備支援鎖定偵測並自動停止輸出電流。一旦外部負載放鬆,將自動恢復到系統指定的速度。各種開漏輸出類型,如 FG、RD、停止 RD 和反向 RD,作為系統監控 DC 風扇(具有 4、6 或 8 個磁極)速度的轉速計進行實現。
Features
- Support Hall sensor / Hall IC input
- Built-in On-line Tuning for iterative performance tuning
- 15Hz ~ 100KHz PWM input frequency range with reversible polarity
- Support soft start with programmable duty cycle and soft-switch function
- Built-in soft-switch function with programmable duration
- Closed-loop fan speed control within ±5% accuracy of rotation speed
- Programmable linear curve set by [HS], [LS], and [S0]
- Programmable fan speed curve set by 6 points
- Various open-drain tachometers: FG, RD, Stop RD and Reverse RD
- Built-in programmable period for lock detection and auto recovery
- Support internal current-limit setting with 7 levels
- Support current-limit setting from external pin
- Wide product selection to support 4, 6, 8 or 12 magnetic poles
- 2-wire communication channel to program parameters in OTP memory
- Compact DFN16 package
- Green package available
- RoHS compliant and Halogen free
- Support Hall sensor / Hall IC input
應用領域