Three-Section Sensorless BLDC Gate Drivers for Knowledge Heart Cooling Programs


Allegro MicroSystems, Inc. immediately introduced it has expanded its portfolio of three-phase sensorless BLDC gate drivers. Its latest choices, the A89332 and A89332-1, are designed to satisfy the evolving wants of cooling techniques in immediately’s knowledge facilities providing versatile choices for designers. Out there with revolutionary built-in energy loss brake (A89332) and AC-loss (A89332-1) options, these drivers allow compact, high-airflow fan designs to enhance thermal effectivity, lowering power use and knowledge middle prices.

When server followers malfunction or break, backflow causes them to enter reverse rotation. The opposite followers must work more durable to compensate for the ensuing airflow, which will increase energy consumption. The standard answer to stopping reverse rotation is including exterior circuitry and elements to operate as the ability loss brake—elements that don’t match into 1U followers. This strategy requires software program coding, will increase invoice of fabric (BoM) dimension, and will increase time to market.

Addressing these ache factors, the A89332’s built-in energy loss brake (PLB) operate applies a brake to followers that aren’t working correctly and stops them from spinning, with braking efficiency that’s 4 occasions higher than discrete implementations. This eliminates pointless energy consumption and will increase thermal effectivity, in the end lowering knowledge middle prices. When mixed with the A89332-1’s AC loss logic, Allegro is now in a position to serve the high-end server market with the trade’s smallest gate driver, provided in a 4mmx4mm QFN package deal that’s 36% smaller than comparable choices—good for “donut” circuit boards.

Allegro presents the trade’s solely code-free options for server cooling followers; the corporate’s revolutionary embedded algorithms and graphical person interface (GUI) remove the necessity for an extra Corridor-effect place sensor and motor management unit (MCU), and no extra software program growth is required. This helps system designers scale back R&D overhead, simplify motor tuning, and enhance time to market. The decreased want for exterior elements additional helps optimize system value and enhance reliability, and built-in performance provides prospects elevated flexibility when confronted with tight design necessities.

Each gate drivers construct on Allegro’s historical past and expertise creating distinctive motor management units for the automotive and industrial markets. With greater than three billion shipped within the final decade, the corporate’s trusted and dependable motor drivers have helped producers innovate safer, extra sturdy motor-drive options with elevated reliability. They are often discovered throughout automotive, industrial, and shopper purposes in merchandise starting from electrical automobiles to cordless energy instruments to hoover cleaners.

“The necessity to construct knowledge facilities that function extra sustainably and eat much less energy is accelerating,” says Andy Wang, Product Line Director for I&O Motors at Allegro. “It’s not nearly constructing low-maintenance ‘lights-out’ services; server and element designers are on the lookout for new and novel methods to scale back warmth and energy consumption, and followers play an enormous position. We’ve been specializing in the information middle marketplace for a while, and with the addition of the A89332 and A89332-1, we’re giving them improved management over their cooling techniques for max effectivity.”

Each units can be found in a 26-contact 4mm × 4mm QFN package deal with uncovered thermal pad (suffix EX). These packages are lead (Pb) free, with 100% matte-tin leadframe plating. For product pricing and samples, contact an Allegro gross sales workplace or licensed distributor. For datasheets and extra data on Allegro’s gate drivers, together with the brand new A89332 and A89332-1, please go to the Allegro web site.




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