comment on this article

Single chip solution

Diodes Incorporated has introduced a single chip solution providing all the functionality required for driving low power single coil brushless DC fans and motors.

The AH5792 integrates a Hall sensor and amplifier, complete digital control circuitry and a full bridge output driver in the low profile SOT553 package and will appeal in particular to low voltage micro-motors and ultra thin cooling fan applications.
With its bi-directional, H-bridge output stage, the AH5792 suits single-phase full wave brushless DC motor control, by offering a pair of push-pull output drivers to source and sink current. The device operating voltage range of 1.8V to 5V also caters for low operating voltage miniature DC fans requiring low voltage start-up.
To protect motor windings from damage, the new motor controller includes integrated locked rotor detection and automatic self restart functions which serve to shutdown the output driver in the event of a locked rotor and then restart the motor when the rotor is freed. In addition, a frequency generator output provides users with tachometer-like feedback for external speed monitoring. The all-in-one smart motor controller eliminates the need for external components including a timing capacitor.
The AH5792 has an operating temperature range of –40C to 100C and is fully RoHs complaint with Green molding compound.

Chris Shaw

Comment on this article

This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team.

What you think about this article:

Add your comments


Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

Related Articles