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STL7100
STL7100 是一款內建功率 MOSFET 和霍爾傳感器的無刷直流電機控制器。它可以提供高達 1.2A 的驅動電流,並在 3V 到 18V 的工作電壓範圍內可靠運行。STL7100 支持直接 PWM 輸入,不需要PWM到DC轉換的電路,從而減少外部元件數量。其用戶友好的編程介面允許調整風扇曲線設置。該設備提供可調的 PWM 輸出頻率,以支持單相全波驅動。整合了可編程增量佔空比的軟啟動功能。 STL7100 有效地抑制了線圈電流的啟動尖波,減少了啟動噪音以及功耗損失。此外,它內置的軟切換功能可以減少可聽噪音和能量損失。另外, 亦整合使用內部參考電壓的電流限制功能。此外,STL7100 支援熱關閉功能,以防止過熱。支援鎖定偵測,自動停止輸出電流。當外部負載釋放後,它無縫恢復到先前的速度。STL7100 通過 open-drain 輸出 FG 信號提供旋轉速度指示。
Features
- Absolute maximum voltage 25V
- Operating input range 3V ~ 18V
- Embedded hall sensor with high sensitivity ±20 Gauss
- Built-in power MOSFET with peak current 1.2A
- Closed-loop fan speed control within ±5% accuracy of rotation speed
- Support soft start with programmable duty cycle
- Support timing control for better performance
- Support auto-phase control
- Built-in soft-switch function with programmable duration
- Programmable fan speed curve set by 6 points
- 12.4Hz ~ 100KHz PWM input frequency range with reverse-able polarity
- Support current-limit setting internally with multi-levels
- Built-in thermal protection circuit (160°C)
- Built-in over-voltage protection
- Built-in programmable period for lock detection and auto recovery
- Various open-drain tachometers: FG, RD, Stop RD and Reverse RD
- Wide product selection to support 4, 6 or 8 magnetic poles
- Built-in On-line Tuning for iterative performance tuning
- 2-wired communication channel to program parameters
- Parameters can be programmed twice
- Compact TSOT23-6G / TSOT23-6L package
- Absolute maximum voltage 25V
應用領域