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Related Links:

Datasheets:
A4930: Single Phase Fan Pre-Driver (PDF)

Selection Guides:
Power Motor Drivers,

Power Motor Drivers - Brushless DC

when this product is updated

Press Releases:
A4930: Allegro MicroSytems, Inc. Announces New Single Phase Brushless DC Pre-driver IC

A4930
Single Phase Fan Pre-Driver

Features and Benefits

• Synchronous rectification for low power dissipation
• Drives four N-channel MOSFETs
• Internal UVLO and thermal shutdown circuitry
• Hall element input
• PWM current limiting
• Dead time protection
• FG output
• RD output
• Lock detect protection
• High V_BB absolute maximum
• Soft start

Description

Designed for pulse width modulated (PWM) current control of single phase brushless fans, the A4930 minimizes external component count and integrates all the key features required for high-current fans. Internal synchronous rectification control circuitry is provided to improve power dissipation in the external MOSFETs during PWM operation. Internal circuit protection includes thermal shutdown with hysteresis, rotor lock, and dead time protection.

The A4930 is supplied in a 0.90 nominal overall height, 5 mm × 5 mm, 28-pin QFN with exposed thermal pad, (suffix ET). It is lead (Pb) free with 100% matte tin leadframe plating.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
A4930METTR-T	28-lead QFN	Yes	view data	-20 °C to  105 °C	new

Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.