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STL6810
The STL6810 series is a BLDC fan controller with advanced closed-loop control within ±5% variation of rotation speed. The built-in soft-switch and advanced timing control improve the motor efficiency and vibration. The STL6810 supports direct PWM input to eliminate the circuit for PWM to DC conversion and thus, external component counts can be reduced. Friendly programming interface can adjust any fan curve setting. The device provides adjustable PWM outputs frequency to support single-phase full-wave driving of a motor coil. The STL6810 has a soft-start feature with programmable incremental duty cycle to smooth-out the power-up spike on the coil current and it can reduce the start-up noise and relax the power budget. The built-in soft-switch function can reduce the acoustic noise and power loss. The device provides a current limiting function by internal reference voltages. The device supports lock detection and cease the output current automatically. Once the external load is relaxed, it will automatically recover to system-specified speed. Various open-drain output types, such as FG, RD, Stop RD, and Reverse RD, are implemented as the tachometer for system to monitor the speed of a DC fan with 4, 6, or 8 magnetic poles.
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
- Support brake before soft start and brake for stop
- Support 25KHz and 50KHz PWM output
- Built-in soft-switch function with programmable duration
- Support timing control for better performance
- 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
- Built-in thermal protection circuit (150°C)
- Support internal current-limit setting with 7 levels
- Support current-limit setting from external pin
- Support programmable VIH level (1.6V or 1.8V)
- Support programmable UVLO threshold
- Wide product selection to support 2, 4, 6, 8 or 12 magnetic poles
- 2-wire communication channel to program parameters in OTP memory
- Parameters can be programmed twice
- Compact DFN16 package
- Green package available
- RoHS compliant and Halogen free
- Support Hall sensor / Hall IC input
Applications
