RT8749 Datasheet Digital Single-phase Full Wave Bldc Fan Controller

Manufacturer: Richtek

Overview: ® RT8749 Digital Single-Phase Full Wave BLDC Fan Controller General.

Datasheet Details

Part number	RT8749
Manufacturer	Richtek
File Size	102.93 KB
Description	Digital Single-Phase Full Wave BLDC Fan Controller
Datasheet	RT8749-Richtek.pdf

The RT8749 is a highly integrated digital control IC for regulating single-phase full wave brushless DC (BLDC) fans at a programmed speed.

The controller IC accepts a Pulse-Width Modulated (PWM) signal provided by the host, and decodes the duty-ratio of this PWM signal to 256 counts.

The decoded duty-ratio will then be used for mapping to the programmed speed which is stored at the embedded flash memory.

including the peak-current limit, thermal shutdown protection, under-voltage protection and motor lock protection. An automatic restart circuit is designed to rotate the motor after the lock condition is released. Features.
Embedded 256 x 16 Bits Flash Memory.
Built-in Low RDS(ON) Power MOSFET.
External PWM Speed Control.
Wide Range External PWM Input Frequency (100Hz to 100kHz).
Built-in Frequency Generator with Selectable FG or FG/2 Output Signal.
Built-in Peak.

Part Number	Description
RT8749A	Digital Single-Phase Full Wave BLDC Fan Controller
RT8720A	Single-Phase Full-Wave Fan Motor Driver
RT8720B	Single-Phase Full-Wave Fan Motor Driver
RT8723	Single-Phase Full-Wave Fan Motor Driver
RT8725	Single-Phase BLDC Fan Driver
RT8003	High-Efficiency Synchronous Buck PWM Converter
RT8005	High-Efficiency Synchronous Buck PWM Converter
RT8008	High Efficiency PWM Step-Down DC/DC Converter
RT8009	High Efficiency PWM Step-Down DC/DC Converter
RT8010	High Efficiency PWM Step-Down DC/DC Converter