AAT4900_06 datasheet(10/13 Pages) ANALOGICTECH

部品番号	AAT4900

部品情報	Buffered Power Half-Bridge

PDF	13 Pages

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メーカー	ANALOGICTECH [Advanced Analogic Technologies]

ホームページ	http://www.analogictech.com

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10 / 13 page

AAT4900

Buffered Power Half-Bridge

4900.2006.05.1.3

Figure 3: Typical Motor Control Block Diagram.

Figure 4: Recommended Decoupling Layout Pattern.

5 V+

2 GND

1 LX

3 EN

4 CLK

AAT4900

CAP

CLK

GND

AAT4900

GND

AAT4900

CLK

DC Brushless

Motor

Clock

Enable

Ground

+5V

Motor Drive

The AAT4900 is also ideally suited for use as an effi-

cient output driver for DC brushless motor control.

The inductive load switching capability of the

AAT4900 eliminates the need for external diodes. A

typical motor control circuit is illustrated in Figure 3.

Recommended Decoupling Layout

Pattern

Because of the extremely fast switching speed and

the high switching currents, optimum placement of

the input capacitor is critical. It is recommended

that a 0.1µF to 10µF 0805 or 1206 ceramic capac-

itor be placed as close as possible to the IC, as

shown in Figure 4. This helps to decouple the

switching transients from the stray inductance

present in the PC board.

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