Datasheet4U Logo Datasheet4U.com

RT8749 - Digital Single-Phase Full Wave BLDC Fan Controller

Description

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.

Features

  • 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.

📥 Download Datasheet

Datasheet Details

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

📁 Similar Datasheet

  • RT8004 - Synchronous Step-Down Regulator (Richtek Technology)
  • RT8015 - Synchronous Step-Down Regulator (Richtek Technology)
  • RT8015B - Synchronous Step-Down Converter (Richtek Technology)
  • RT805 - AUTOMOTIVE BRIDGE RECTIFIERS (LRC)
  • RT81 - AUTOMOTIVE BRIDGE RECTIFIERS (LRC)
  • RT810 - AUTOMOTIVE BRIDGE RECTIFIERS (LRC)
  • RT8100A - Synchronous buck PWM DC/DC (Richtek Technology Corporation)
  • RT8101 - 12V Synchronous Buck PWM DC-DC (Richtek Technology Corporation)
  • RT8101A - 12V Synchronous Buck PWM DC-DC (Richtek Technology Corporation)
  • RT8105 - 5V/12V Synchronous Buck PWM DC-DC Controller (RichTek Technology)
Other Datasheets by Richtek
  • 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

Full PDF Text Transcription

Click to expand full text
® RT8749 Digital Single-Phase Full Wave BLDC Fan Controller General Description 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. This speed profile can be programmed by users for different fan models and applications. By integrating a low RDS(ON) power MOSFET, the RT8749 minimizes component count on the PCB, thus reducing board size and cost of the motor/fan module.
Published: |