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AAT4900IJS-T1 Datasheet(PDF) 10 Page - Advanced Analog Technology, Inc. |
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AAT4900IJS-T1 Datasheet(HTML) 10 Page - Advanced Analog Technology, Inc. |
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10 / 13 page  AAT4900 Buffered Power Half-Bridge 10 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 EN CLK GND IN LX AAT4900 LX IN GND AAT4900 EN 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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