Products Overview

A5931 THREE PHASE SENSORLESS FAN DRIVERS

Allegro MicroSystems

A5931 and A5931-3:Three Phase Sensorless Fan Drivers

The A5931 is a three phase sensorless BLDC fan driver IC that incorporates sinusoidal drive to minimize audible noise and vibration.
The A5931-3 is the latest in the family with a new feature that allows user to adjust deceleration speed from Force Open Loop to Close Loop.
A flexible closed-loop speed control system is integrated into the IC. This eliminates the requirement for a microprocessor-based system and minimizes programming requirements.
The A5931 devices are available in both commercial and automotive grade.

Product Number: A5931, A5931-3

Class: Fan, Motor Controllers, Drivers, BLDC Drivers, Fan Drivers

Tag: BLDC Drivers, Three Phase Sensorless Fan Drivers, Motor, Motion, Ignition Controllers & Drivers

180° sinusoidal drive - Low audible noise and vibration
Motor position using Allegro's sensorless algorithm - Eliminates external Hall sensors
Closed-loop speed control
Speed curve configuration via EEPROM
Lock detection
Soft start
Standby mode
Shorted load protection

Part Number Type Output Current Topology Mounting Style Operating Frequency Moisture Sensitive Number of Outputs Maximum Frequency Operating Temperature Voltage - Supply Package Type
A5931 3 Phase 3A Step-Down (Buck) 3 Output 24.4 kHz Yes Lighting - -40 °C ~ 105 °C(TA) 5V ~ 16V 16-lead TSSOP with exposed thermal pad (LP package),
24-contact 4×4mm QFN with exposed thermal pad (suffix ES)

See more...Allegro

  • See below for downloadable documentation, software, and other resources.

    Datasheet Download on Nov, 2021

Main Products

Allegro Micro Systems

專業的高科技電子零件IC代理商

偉度代理經銷品牌具備互補效益,涵蓋國際半導體大廠美商朗格(Allegro)、萬有半導體(AOS)、德國Vincotech、夏普(Sharp)光耦合器等產品線。
我們整合了磁性感測器晶片、馬達驅動晶片、功率元件、功率模組等產品,提供全方位系統設計之硬體基礎架構,
產品服務聚焦於雲端伺服器電源、伺服器散熱風扇馬達驅動、車用電源系統、LED車燈、工業馬達應用等,滿足客戶完整的半導體方案需求。
我們提供完整的解決方案不僅是在技術上的支援,同時也表現在價格上。如果你對我們代理的產品有任何的需求,請不吝與我們討論,我們會給你滿足的答覆。