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RT8749A - Digital Single-Phase Full Wave BLDC Fan Controller

Description

The RT8749A is a highly integrated digital controlled predriver 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.

Features

  • including the peak-current limit, the thermal shutdown protection, the under-voltage protection and the motor lock protection. An automatic restart circuit is designed to rotate the motor after the lock condition is released.

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Datasheet Details

Part number RT8749A
Manufacturer Richtek
File Size 134.10 KB
Description Digital Single-Phase Full Wave BLDC Fan Controller
Datasheet download datasheet RT8749A Datasheet

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Full PDF Text Transcription

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® RT8749A Digital Single-Phase Full Wave BLDC Fan Controller General Description The RT8749A is a highly integrated digital controlled predriver 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. 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 the user for different fan models and applications. A frequency generator output is included to provide commutation signals to the host to know the current rotating speed.
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