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STL7100
STL7100 是一款内建功率 MOSFET 和霍尔传感器的无刷直流电机控制器。它可以提供高达 1.2A 的驱动电流,并在 3V 到 18V 的工作电压范围内可靠运行。STL7100 支持直接 PWM 输入,不需要PWM到DC转换的电路,从而减少外部组件数量。其用户友好的编程接口允许调整风扇曲线设置。该设备提供可调的 PWM 输出频率,以支持单相全波驱动。整合了可编程增量占空比的软启动功能。 STL7100 有效地抑制了线圈电流的启动尖波,减少了启动噪音以及功耗损失。此外,它内置的软切换功能可以减少可听噪音和能量损失。另外, 亦整合使用内部参考电压的电流限制功能。此外,STL7100 支持热关闭功能,以防止过热。支持锁定侦测,自动停止输出电流。当外部负载释放后,它无缝恢复到先前的速度。STL7100 通过 open-drain 输出 FG 信号提供旋转速度指示。
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
应用领域