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| DRV10866 Datasheet, PDF (8/14 Pages) Texas Instruments – 5-V, THREE-PHASE, SENSORLESS BLDC MOTOR DRIVER | |||
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DRV10866
SBVS206 â NOVEMBER 2012
APPLICATION INFORMATION
www.ti.com
The DRV10866 only requires three external components. A 2.2-µF or higher ceramic capacitor connected to VCC
and ground is needed for decoupling purposes. This capacitor must be placed close to the VCC pin (pin 3) and
GND pin (pin 5). During normal operation, a sudden drop in motor speed (caused by changing the PWM duty
from high to low immediately) causes the VCC voltage to rise to a very high level, especially when an anti-reverse
diode is added on the VCC side. In order to avoid this condition, a larger input capacitor between VCC and GND is
needed, along with removing the anti-reverse diode. The DRV10866 is simple to design with a single-layer
printed circuit board (PCB) layout. During layout, the strategy of ground copper pour is very important to enhance
the thermal performance. Refer to Figure 1 for an example of PCB layout.
Figure 1. Single-Layer PCB Layout
8
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Copyright © 2012, Texas Instruments Incorporated
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