DRV10866DSC datasheet(8/14 Pages) TI

Part #	DRV10866DSC

Description	5-V, THREE-PHASE, SENSORLESS BLDC MOTOR DRIVER

Download	14 Pages

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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8 / 14 page

DRV10866

SBVS206 – NOVEMBER 2012

www.ti.com

APPLICATION INFORMATION

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

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