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STL6800
STL6800系列是一款具有先进闭回路控制的BLDC风扇控制器，旋转速度变化范围在±5%以内。内建的软开关和先进的定时控制提高电机效率及减少振动。STL6800支持直接的PWM输入，不需要PWM到DC转换的电路，从而减少外部组件数量。友好的程序设计界面可以调整任何风扇曲线设置。该设备提供可调的PWM输出频率，以支持单相全波驱动电动机线圈。 STL6800 拥有软启动功能，具有可编程的增量占空比，以抑制线圈电流的启动尖峰，并且可以减少启动噪音和降低功耗。内建的软开关功能可以减少声学噪音和功率损耗。该设备通过内部参考电压提供限流功能。该设备支持锁定侦测并自动停止输出电流。一旦外部负载放松，将自动恢复到系统指定的速度。各种开漏输出类型，如 FG、RD、停止 RD 和反向 RD，作为系统监控 DC 风扇（具有 4、6 或 8 个磁极）速度的转速计进行实现。
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
应用领域
